Fix bungee compilation (did md5 break something?)

Better pipeline injection

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -1,6 +1,6 @@
 name: Bug Report
-description: Unwanted behavior that does not match configuration.
-labels: ["Bug"]
+description: Plugin does not work as described.
+labels: ["Type: Bug"]
 body:
   - type: input
     attributes:
@@ -45,7 +45,7 @@ body:
   - type: textarea
     attributes:
       label: Additional info
-      description: Any other info you want to provide, such as screenshots.
+      description: Anything else you want to provide that will help in resolving the issue faster, such as screenshots or videos.
     validations:
       required: false
   - type: checkboxes
@@ -57,5 +57,7 @@ body:
           required: true
         - label: I have read the wiki to make sure it's not an issue with configuration
           required: true
+        - label: I ticked all of the boxes without actually reading them
+          required: false
         - label: I have read the Compatibility wiki page and am not trying to run the plugin on an unsupported server version / platform
           required: true

.github/ISSUE_TEMPLATE/error.yml

@@ -1,6 +1,6 @@
 name: Error
 description: Error message with a stack trace in console or error file.
-labels: ["Error"]
+labels: ["Type: Error"]
 body:
   - type: input
     attributes:
@@ -51,5 +51,7 @@ body:
           required: true
         - label: I have included a paste of the error
           required: true
+        - label: I ticked all of the boxes without actually reading them
+          required: false
         - label: I have read the Compatibility wiki page and am not trying to run the plugin on an unsupported server version / platform
           required: true

.github/ISSUE_TEMPLATE/memory_leak.yml

@@ -0,0 +1,56 @@
+name: Memory leak
+description: Memory leak caused by TAB.
+labels: ["Type: Memory leak"]
+body:
+  - type: input
+    attributes:
+      label: Server version
+      description: Version and type of used server software where TAB is installed.
+      placeholder: Spigot 1.18.1
+    validations:
+      required: true
+
+  - type: input
+    attributes:
+      label: TAB version
+      description: Full version in numbers, "latest" is not a version.
+      placeholder: 3.0.2
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Heap dump
+      description: Link to uploaded memory dump which I can look into.
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Uncleared object(s)
+      description: Objects you believe should have been removed from the memory but are not
+      placeholder: |
+        There is only 1 player online, but heap dump has 100 instances of TabPlayer
+    validations:
+      required: false
+
+  - type: textarea
+    attributes:
+      label: Additional info
+      description: Any other info you want to provide.
+    validations:
+      required: false
+
+  - type: checkboxes
+    attributes:
+      label: Checklist
+      description: Let's make sure this report is valid
+      options:
+        - label: I am running latest version of the plugin
+          required: true
+        - label: I have included download link of my heap dump
+          required: true
+        - label: I ticked all of the boxes without actually reading them
+          required: false
+        - label: I have explained what I believe is wrong with the heap dump
+          required: true

.github/ISSUE_TEMPLATE/performance_issue.yml

@@ -0,0 +1,55 @@
+name: Performance issue
+description: Performance issue in TAB or in server caused by TAB
+labels: ["Type: Performance"]
+body:
+  - type: input
+    attributes:
+      label: Server version
+      description: Version and type of used server software where TAB is installed.
+      placeholder: Spigot 1.18.1
+    validations:
+      required: true
+
+  - type: input
+    attributes:
+      label: TAB version
+      description: Full version in numbers, "latest" is not a version.
+      placeholder: 3.0.2
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Evidence
+      description: Any evidence proving the performance issue, such as output of /tab cpu or timings.
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Steps to reproduce (if known)
+      description: What to do in order to reproduce this issue
+      placeholder: |
+        Step 1: ..
+        Step 2: ..
+    validations:
+      required: false
+
+  - type: textarea
+    attributes:
+      label: Additional info
+      description: Any other info you want to provide.
+    validations:
+      required: false
+
+  - type: checkboxes
+    attributes:
+      label: Checklist
+      description: Let's make sure this report is valid
+      options:
+        - label: I am running latest version of the plugin
+          required: true
+        - label: I have included sufficient evidence of the issue
+          required: true
+        - label: I ticked all of the boxes without actually reading them
+          required: false

.github/ISSUE_TEMPLATE/wiki_change.yml

@@ -1,6 +1,6 @@
 name: Wiki change
 description: Change to text on a wiki page or adding a new section.
-labels: ["Wiki"]
+labels: ["Type: Wiki change"]
 body:
   - type: input
     attributes:

.github/workflows/build.yml

@@ -3,7 +3,6 @@ on:
   push:
     branches:
       - master
-      - v3
   pull_request:
     types: [opened, synchronize, reopened]
 jobs:
@@ -11,22 +10,22 @@ jobs:
     name: Build
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v3.3.0 #https://github.com/actions/checkout/releases
         with:
           fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
       - name: Set up JDK 11
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v3.9.0 #https://github.com/actions/setup-java/releases
         with:
           distribution: 'temurin'
           java-version: 11
       - name: Cache SonarCloud packages
-        uses: actions/cache@v2
+        uses: actions/cache@v3.2.3 #https://github.com/actions/cache/releases
         with:
           path: ~/.sonar/cache
           key: ${{ runner.os }}-sonar
           restore-keys: ${{ runner.os }}-sonar
       - name: Cache Gradle
-        uses: actions/cache@v2
+        uses: actions/cache@v3.2.3 #https://github.com/actions/cache/releases
         with:
           path: |
             ~/.gradle/caches
@@ -39,7 +38,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  # Needed to get PR information, if any
         run: ./gradlew clean build
       - name: Upload a Build Artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v3.1.2 #https://github.com/actions/upload-artifact/releases
         with:
           name: Jar
           path: jar/build/libs/TAB-**.jar

CONTRIBUTING.md

@@ -0,0 +1,10 @@
+If this plugin has helped you in any way, and you would like to return something back 
+to make the plugin even better, there is a lot of ways to contribute:  
+* Open a **pull request** containing a new feature or a bug fix, which you believe many users will benefit from.
+* Make detailed high-quality **bug reports**. The difference between a bug getting fixed in 1 week vs 1 hour 
+is in quality of the report (typically providing correct steps to reproduce that actually work).
+* Test **experimental builds**, which can be found in [GitHub Actions](https://github.com/NEZNAMY/TAB/actions) for problems of any kind including bugs. 
+This way you will help make the actual releases more stable / help get stable releases sooner.
+* Help improve the wiki by opening a [Wiki change issue](https://github.com/NEZNAMY/TAB/issues/new?assignees=&labels=Wiki&template=wiki_change.yml), 
+where you can improve existing descriptions, add information you found missing, fix typos / grammar mistakes or add more examples of usage of functions.
+* [Buy a copy](https://builtbybit.com/resources/14009/) of the plugin or [send a donation](https://paypal.me/neznamy1) to keep the plugin active.

LICENSE

@@ -0,0 +1,174 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
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+
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+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
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+
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+
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+
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+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
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+      the terms of any separate license agreement you may have executed
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+
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+      agreed to in writing, Licensor provides the Work (and each
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+      implied, including, without limitation, any warranties or conditions
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+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
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+      other commercial damages or losses), even if such Contributor
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+   9. Accepting Warranty or Additional Liability. While redistributing
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+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.

README.md

@@ -6,26 +6,71 @@ More information can be found at [Why TAB?](https://github.com/NEZNAMY/TAB/wiki/
 # Distribution
 As of TAB 3.0.0, released with MC 1.18 (November 30th, 2021), there is no free / premium
 version anymore. Only one version of the plugin exists now, which contains all implemented features
-and is available to everyone for free. However, official support on discord is only provided to 
-those who have purchased the plugin.  
+and is available to everyone for free. However, customer support is only provided to 
+customers who have purchased the plugin (see [Customer support](#customer-support)).  
 
 # Compiling
 Compilation requires JDK 8 and up.  
 To compile the plugin, run `./gradlew build` from the terminal.  
-Once the plugin compiles, grab the jar from `/jar/build/libs/` folder.
+Once the plugin compiles, grab the jar from `/jar/build/libs/` folder.  
+The universal jar contains all modules for all supported platforms.
 
-# Links
-The precompiled JAR can be downloaded for free from:  
-* GitHub releases: https://github.com/NEZNAMY/TAB/releases
-* MC-Market: https://www.mc-market.org/resources/20631/
+# Customer support
+Unlike with other projects where requirements and level of support provided are unclear,
+we provide a clear answer to what kind of service you will or will not receive. Some don't
+even clearly state if they are free or paid. While they are listed as paid on spigot, they have
+a free download link in description, which can be confusing.  
+  
+Free plugins typically do have a support discord, however you will rarely receive
+official support from the developers, especially for large projects with tons of users, where
+helping everyone in the world (theoretically) would consume too much time, leaving authors
+no time left to actually work on the project.
+In the end, they are free, made by people in their free time, and they are allowed to choose
+what they do or don't want to do in their free time. They often leave support to other people,
+possibly staff members, who are, however, in the end just more volunteers who may not even know
+the answer.  
+  
+With paid plugins you are more likely to receive support, but unless explicitly said, nothing is
+guaranteed. There are lots of paid plugins where authors don't provide any support or redirect
+it to helpers, where again they are unpaid volunteers who might not even know the answer.  
+  
+In TAB, everything is clearly defined. The plugin is free to download for everyone.
+Customer support, however, is only provided to customers who have formally purchased a copy 
+of the plugin on any of the websites the plugin is being sold on:  
+* [BuiltByBit](https://builtbybit.com/resources/14009/) (accepts any payment method)  
+* [Polymart](https://polymart.org/resource/484) (only PayPal)
+  
+After purchasing, you can request assistance via either private messages on the website where you
+have purchased it, or using [TAB's Discord server](https://discord.gg/EaSvdk6) (which is highly 
+preferred, since the communication will be much faster thanks to notifications and more).  
+* We use a ticket system, which allows us to effectively track any amount of unresolved problems.
+No more questions getting lost in the sea of messages from other people asking. Tickets are only closed
+after user confirmed all of their questions were answered and then receive a transcript of the ticket
+from the bot after ticket is closed into private messages (unless user is blocking them).
+* We do not rely on the community helping, which often makes things even worse. We know people have
+better things to do than helping random people with a random plugin, especially when most people only
+have a very basic knowledge of the plugin, not being able to answer more complicated problems.
+* We have notifications enabled and reply as soon as possible. We do not have the server muted unlike
+most mods on most servers who only check it when they are really bored, give a wiki link and 
+disappear again.
+* As the developer, I do not rely on helpers providing support instead of me. They are handy as
+I am obviously not available 24/7, but I do not intentionally leave anything to them. I reply
+whenever I am available without any intentional delays.  
+  
+The wiki contains everything about the plugin in one way or another, so support should not 
+even be needed. It also contains a few examples, but obviously cannot contain a pre-made config
+for every possible idea anyone can come up with.  
+Support is provided to people who decided paying for support is more time efficient than reading the wiki,
+especially for serious servers, where price of the plugin is nothing compared to other server costs.
 
-Supporting my work:  
-* MC-Market: https://www.mc-market.org/resources/14009/
-* Polymart: https://polymart.org/resource/484
-
-Other links:
-* Discord support for buyers: https://discord.gg/EaSvdk6  
-* Wiki: https://github.com/NEZNAMY/TAB/wiki  
+# Other links
+Download the plugin for free: 
+* [GitHub releases](https://github.com/NEZNAMY/TAB/releases)
+* [BuiltByBit](https://builtbybit.com/resources/20631/)
+* [Modrinth](https://modrinth.com/plugin/tab-was-taken)
+  
+[Wiki](https://github.com/NEZNAMY/TAB/wiki)  
+[Donate](https://paypal.me/neznamy1) if you are feeling extra generous
 
 # Issues
 The [Issues](https://github.com/NEZNAMY/TAB/issues) section is **only** available for cases included in templates.
@@ -33,15 +78,9 @@ In other words, they **are not available for**:
 * **Support** - support is provided on discord for buyers, where roles are given to verified users
 allowing us to know who bought it and who didn't. It also serves as a much faster way of communication.
 * **Feature requests** - closed indefinitely.
+  
+**If you're a customer, please use discord for reporting bugs, especially if you aren't good at making bug reports. 
+You will be provided with a much faster and higher quality service.**
 
 # Contributing
-If this plugin has helped you in any way, and you would like to return something back 
-to make the plugin even better, there is a lot of ways to contribute:  
-* Open a **pull request** containing a new feature or a bug fix, which you believe many users will benefit from.
-* Make detailed high-quality **bug reports**. The difference between a bug getting fixed in 1 week vs 1 hour 
-is in quality of the report (typically providing correct steps to reproduce that actually work).
-* Test **experimental builds**, which can be found in [Github Actions](https://github.com/NEZNAMY/TAB/actions) or in a form of pre-releases on discord
-for problems of any kind including bugs. This way you will help make the actual releases more stable / help get stable releases sooner.
-* Help improve the wiki by opening a [Wiki change issue](https://github.com/NEZNAMY/TAB/issues/new?assignees=&labels=Wiki&template=wiki_change.yml), 
-where you can improve existing descriptions, add information you found missing, fix typos / grammar mistakes or add more examples of usage of functions.
-* [Buy a copy](https://www.mc-market.org/resources/14009/) of the plugin or [send a donation](https://paypal.me/neznamy1) to keep the plugin active.
+See [CONTRIBUTING.md](https://github.com/NEZNAMY/TAB/blob/master/CONTRIBUTING.md)

SECURITY.md

@@ -0,0 +1,2 @@
+# Security Policy
+If you found a security issue, send me a private message anywhere.

api/build.gradle.kts

@@ -9,14 +9,19 @@ dependencies {
     }
     compileOnlyApi(libs.snakeyaml)
     api(libs.yamlAssist)
-    compileOnlyApi(libs.gson)
     compileOnlyApi(libs.adventureMiniMessage)
     compileOnlyApi(libs.adventureApi)
     compileOnlyApi(libs.adventureLegacy)
+    compileOnlyApi(libs.via)
 }
 
 blossom {
-    replaceToken("@plugin_version@", project.version)
+    replaceToken("@name@", rootProject.name)
+    replaceToken("@id@", rootProject.ext.get("id")!!.toString())
+    replaceToken("@version@", project.version)
+    replaceToken("@description@", project.description)
+    replaceToken("@website@", rootProject.ext.get("website")!!.toString())
+    replaceToken("@author@", rootProject.ext.get("author")!!.toString())
     replaceTokenIn("src/main/java/me/neznamy/tab/api/TabConstants.java")
 }
 

api/src/main/java/me/neznamy/tab/api/ArmorStand.java

@@ -1,5 +1,9 @@
 package me.neznamy.tab.api;
 
+/**
+ * Interface representing an armor stand attached to player
+ * for displaying text in game.
+ */
 public interface ArmorStand {
 
     /**
@@ -7,7 +11,7 @@ public interface ArmorStand {
      *
      * @return  true if static, false if dynamic
      */
-    boolean hasStaticOffset();
+    boolean isStaticOffset();
     
     /**
      * Changes offset of the armor stand
@@ -43,28 +47,7 @@ public interface ArmorStand {
      *          player to send packet to
      */
     void teleport(TabPlayer viewer);
-    
-    /**
-     * Changes sneaking flag and sends packets to everyone in range
-     *
-     * @param   sneaking
-     *          new sneaking status
-     */
-    void sneak(boolean sneaking);
-    
-    /**
-     * DeSpawns armor stand for everyone
-     */
-    void destroy();
-    
-    /**
-     * DeSpawns armor stand for specified player
-     *
-     * @param   viewer
-     *          player to send packet to
-     */
-    void destroy(TabPlayer viewer);
-    
+
     /**
      * Updates armor stand's name if needed
      */
@@ -92,6 +75,4 @@ public interface ArmorStand {
      *          player to spawn for
      */
     void spawn(TabPlayer viewer);
-    
-    void respawn(TabPlayer viewer);
 }

api/src/main/java/me/neznamy/tab/api/ArmorStandManager.java

@@ -10,5 +10,11 @@ public interface ArmorStandManager {
      */
     void destroy();
 
+    /**
+     * Refreshes text of all armor stands for all nearby players
+     *
+     * @param   force
+     *          If refresh should be force despite no update seemingly being needed
+     */
     void refresh(boolean force);
 }

api/src/main/java/me/neznamy/tab/api/FeatureManager.java

@@ -91,9 +91,26 @@ public interface FeatureManager {
      */
     boolean onCommand(TabPlayer sender, String command);
 
+    /**
+     * Internal function that marks objective packet deserialization
+     * when at least 1 feature uses it.
+     * <p>
+     * Internal use only.
+     */
     void markObjective();
 
+    /**
+     * Internal function that marks display objective packet deserialization
+     * when at least 1 feature uses it.
+     * <p>
+     * Internal use only.
+     */
     void markDisplayObjective();
 
+    /**
+     * Returns array of all currently enabled features
+     *
+     * @return  array of all currently enabled features
+     */
     TabFeature[] getValues();
 }

api/src/main/java/me/neznamy/tab/api/HeaderFooterManager.java

@@ -1,16 +1,82 @@
 package me.neznamy.tab.api;
 
+/**
+ * Interface allowing to send header/footer to players.
+ * <p>
+ * Instance can be obtained using {@link TabAPI#getHeaderFooterManager()}.
+ * This requires the Header/footer feature to be enabled in config, otherwise
+ * the method will return {@code null}.
+ */
 public interface HeaderFooterManager {
 
+    /**
+     * Sets raw value of header to specified value. This overrides plugin
+     * configuration until reset is called. Has full placeholder support
+     * and will send update packet whenever a placeholder used inside
+     * changes its value.
+     *
+     * @param   player
+     *          Player to set header for
+     * @param   header
+     *          Raw header value
+     */
     void setHeader(TabPlayer player, String header);
 
+    /**
+     * Sets raw value of footer to specified value. This overrides plugin
+     * configuration until reset is called. Has full placeholder support
+     * and will send update packet whenever a placeholder used inside
+     * changes its value.
+     *
+     * @param   player
+     *          Player to set header for
+     * @param   footer
+     *          Raw footer value
+     */
     void setFooter(TabPlayer player, String footer);
 
+    /**
+     * Sets raw value of header and footer to specified values. This overrides plugin
+     * configuration until reset is called. Has full placeholder support
+     * and will send update packet whenever a placeholder used inside
+     * changes its value.
+     *
+     * @param   player
+     *          Player to set header for
+     * @param   header
+     *          Raw header value
+     * @param   footer
+     *          Raw footer value
+     */
     void setHeaderAndFooter(TabPlayer player, String header, String footer);
 
+    /**
+     * Resets header value previously set using {@link #setHeader(TabPlayer, String)}
+     * or {@link #setHeaderAndFooter(TabPlayer, String, String)} and restores internal
+     * logic using configuration files.
+     *
+     * @param   player
+     *          Player to reset header for
+     */
     void resetHeader(TabPlayer player);
 
+    /**
+     * Resets footer value previously set using {@link #setFooter(TabPlayer, String)}
+     * or {@link #setHeaderAndFooter(TabPlayer, String, String)} and restores internal
+     * logic using configuration files.
+     *
+     * @param   player
+     *          Player to reset header for
+     */
     void resetFooter(TabPlayer player);
 
+    /**
+     * Resets values previously set using {@link #setHeader(TabPlayer, String)},
+     * {@link #setFooter(TabPlayer, String)} or {@link #setHeaderAndFooter(TabPlayer, String, String)}
+     * and restores internal logic using configuration files.
+     *
+     * @param   player
+     *          Player to reset header and footer for
+     */
     void resetHeaderAndFooter(TabPlayer player);
 }

api/src/main/java/me/neznamy/tab/api/ProtocolVersion.java

@@ -1,5 +1,11 @@
 package me.neznamy.tab.api;
 
+import com.viaversion.viaversion.api.Via;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.util.UUID;
+
 /**
  * Enum class representing all possibly used protocol versions
  */
@@ -8,6 +14,9 @@ public enum ProtocolVersion {
     UNKNOWN_SERVER_VERSION ("Unknown"),
     UNKNOWN_CLIENT_VERSION ("Unknown"),
     PROXY   ("Proxy"),
+    V1_19_4 (762),
+    V1_19_3 (761),
+    V1_19_2 (760),
     V1_19_1 (760),
     V1_19   (759),
     V1_18_2 (758),
@@ -68,13 +77,16 @@ public enum ProtocolVersion {
     public static final ProtocolVersion[] VALUES = values();
 
     /** Version's network id found at https://wiki.vg/Protocol_version_numbers */
-    private final int networkId;
+    @Getter private final int networkId;
 
-    /** Version's minor version, such as 16 for 1.16.x */
-    private int minorVersion;
+    /** Version's minor version, such as 16 for 1.16.x. Allowing override to
+     * set minor version of UNKNOWN_SERVER_VERSION value to value from package to fix compatibility
+     * with server forks that set bukkit version field value to "Unknown".
+     */
+    @Getter @Setter private int minorVersion;
 
     /** Version's friendly name displayed in %player-version% placeholder */
-    private final String friendlyName;
+    @Getter private final String friendlyName;
 
     /**
      * Constructs new instance with given network id
@@ -82,7 +94,7 @@ public enum ProtocolVersion {
      * @param   networkId
      *          network id of this version
      */
-    ProtocolVersion(int networkId){
+    ProtocolVersion(int networkId) {
         this.networkId = networkId;
         this.minorVersion = Integer.parseInt(toString().split("_")[1]);
         this.friendlyName = toString().substring(1).replace("_", ".");
@@ -94,51 +106,12 @@ public enum ProtocolVersion {
      * @param   friendlyName
      *          friendly name to display
      */
-    ProtocolVersion(String friendlyName){
+    ProtocolVersion(String friendlyName) {
         this.networkId = 999;
         this.minorVersion = 18;
         this.friendlyName = friendlyName;
     }
 
-    /**
-     * Returns the version's network id
-     *
-     * @return  version's network id
-     */
-    public int getNetworkId() {
-        return networkId;
-    }
-
-    /**
-     * Returns user-friendly name of the version (such as 1.16.2 instead of V1_16_2)
-     *
-     * @return  user-friendly name of the version
-     */
-    public String getFriendlyName() {
-        return friendlyName;
-    }
-
-    /**
-     * Returns minor version of this release, such as 8 for 1.8.x or 13 for 1.13.x
-     *
-     * @return  version's minor version
-     */
-    public int getMinorVersion() {
-        return minorVersion;
-    }
-
-    /**
-     * Overrides minor version of the version instance. This is used internally to
-     * set minor version of UNKNOWN_SERVER_VERSION value to value from package to fix compatibility
-     * with server forks that set bukkit version field value to "Unknown".
-     *
-     * @param   minorVersion
-     *          minor version to change value to
-     */
-    public void setMinorVersion(int minorVersion) {
-        this.minorVersion = minorVersion;
-    }
-
     /**
      * Returns enum constant of entered version or UNKNOWN_SERVER_VERSION if unknown version
      *
@@ -168,4 +141,19 @@ public enum ProtocolVersion {
         }
         return UNKNOWN_CLIENT_VERSION;
     }
+
+    /**
+     * Gets player's network version using ViaVersion API
+     *
+     * @param   player
+     *          Player's UUID
+     * @param   playerName
+     *          Player's name for debug messages
+     * @return  Player's network version
+     */
+    public static int getPlayerVersionVia(UUID player, String playerName) {
+        int version = Via.getAPI().getPlayerVersion(player);
+        TabAPI.getInstance().debug("ViaVersion returned protocol version " + version + " for " + playerName);
+        return version;
+    }
 }

api/src/main/java/me/neznamy/tab/api/TabAPI.java

@@ -18,6 +18,13 @@ public abstract class TabAPI {
     /** Instance of the API */
     private static TabAPI instance;
 
+    /**
+     * Constructs new instance and sets it as new API instance
+     */
+    public TabAPI() {
+        instance = this;
+    }
+
     /**
      * Returns API instance. If instance was not set by the plugin, throws
      * {@code IllegalStateException}. This is usually caused by shading the API
@@ -29,21 +36,15 @@ public abstract class TabAPI {
      *          If instance is {@code null}
      */
     public static TabAPI getInstance() {
-        if (instance == null) throw new IllegalStateException("API instance is null. This likely means you shaded TAB's API into your project" +
-                " instead of only using it, which is not allowed.");
+        if (instance == null) throw new IllegalStateException("The API instance is null. This can have 2 possible causes: \n" +
+                "#1 - API was called before TAB was loaded. This means your plugin was loaded before TAB was. To make sure your " +
+                "plugin loads after TAB, add it as a depend or softdepend of your plugin.\n" +
+                "#2 - You shaded TAB's classes into your plugin, instead of only using them. This is not allowed. To verify this " +
+                "is your case, unzip your plugin and check for TAB's classes. If they are there, you will need to fix your compiler " +
+                "to not include them, such as scope provided for maven compilation.");
         return instance;
     }
 
-    /**
-     * Instance setter for internal use by the plugin only.
-     *
-     * @param   instance
-     *          API instance
-     */
-    public static void setInstance(TabAPI instance) {
-        TabAPI.instance = instance;
-    }
-
     /**
      * Returns player object from given UUID
      *

api/src/main/java/me/neznamy/tab/api/TabConstants.java

@@ -1,26 +1,33 @@
 package me.neznamy.tab.api;
 
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+
 /**
  * A class containing various constants used everywhere in the plugin
  * to allow easier overview and modification to prevent inconsistencies.
  */
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
 public class TabConstants {
 
-    public static final String PLUGIN_VERSION = "@plugin_version@";
+    public static final String PLUGIN_NAME = "@name@";
+    public static final String PLUGIN_ID = "@id@";
+    public static final String PLUGIN_VERSION = "@version@";
+    public static final String PLUGIN_DESCRIPTION = "@description@";
+    public static final String PLUGIN_WEBSITE = "@website@";
+    public static final String PLUGIN_AUTHOR = "@author@";
+
     public static final String NO_GROUP = "NONE";
     public static final String DEFAULT_GROUP = "_DEFAULT_";
     public static final String PLUGIN_MESSAGE_CHANNEL_NAME = "tab:bridge-2";
-    public static final String REDIS_CHANNEL_NAME = "TAB";
-
-    /**
-     * Private constructor to prevent the class from being instantiated
-     */
-    private TabConstants() {}
+    public static final String REDIS_CHANNEL_NAME = PLUGIN_NAME;
+    public static final String PIPELINE_HANDLER_NAME = PLUGIN_NAME;
 
     /**
      * Feature sub-category explaining why / when a certain feature
      * needed CPU time to process tasks.
      */
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
     public static class CpuUsageCategory {
 
         public static final String PLAYER_JOIN = "Player Join";
@@ -54,17 +61,13 @@ public class TabConstants {
         public static final String SCOREBOARD_PACKET_CHECK = "Checking for other plugins";
         public static final String PROCESSING_PLAYER_MOVEMENT = "Processing player movement";
         public static final String TELEPORTING_WITHER = "Teleporting wither";
-
-        /**
-         * Private constructor to prevent the class from being instantiated
-         */
-        private CpuUsageCategory() {}
     }
 
     /**
      * Information why a specific feature sent a packet
      * and what the packet sent is supposed to do.
      */
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
     public static class PacketCategory {
 
         public static final String BOSSBAR_COLOR_STYLE = "BossBar (Color and style)";
@@ -83,6 +86,8 @@ public class TabConstants {
         public static final String NAMETAGS_TEAM_UNREGISTER = "NameTags (Team unregister)";
         public static final String NAMETAGS_TEAM_UPDATE = "NameTags (Team update)";
 
+        public static final String SORTING_CHANGING_TEAM_NAME = "Sorting (Changing team name)";
+
         public static final String SCOREBOARD_TITLE = "Scoreboard (Title)";
         public static final String SCOREBOARD_LINES = "Scoreboard (Lines)";
 
@@ -92,16 +97,12 @@ public class TabConstants {
         public static final String UNLIMITED_NAMETAGS_TELEPORT = "Unlimited NameTags (Teleporting)";
         public static final String UNLIMITED_NAMETAGS_SNEAK = "Unlimited NameTags (Sneaking)";
         public static final String UNLIMITED_NAMETAGS_METADATA = "Unlimited NameTags (Metadata)";
-
-        /**
-         * Private constructor to prevent the class from being instantiated
-         */
-        private PacketCategory() {}
     }
 
     /**
      * Permission nodes used by the plugin
      */
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
     public static class Permission {
 
         public static final String COMMAND_ALL = "tab.admin";
@@ -116,7 +117,11 @@ public class TabConstants {
         public static final String COMMAND_MYSQL_DOWNLOAD = "tab.mysql.download";
         public static final String COMMAND_MYSQL_UPLOAD = "tab.mysql.upload";
         public static final String COMMAND_NAMETAG_TOGGLE = "tab.nametag.toggle";
+
+        public static final String COMMAND_NAMETAG_TOGGLE_OTHER = "tab.nametag.toggle.other";
         public static final String COMMAND_NAMETAG_PREVIEW = "tab.nametag.preview";
+
+        public static final String COMMAND_NAMETAG_PREVIEW_OTHER = "tab.nametag.preview.other";
         public static final String COMMAND_PARSE = "tab.parse";
         public static final String COMMAND_SCOREBOARD_ANNOUNCE = "tab.announce.scoreboard";
         public static final String COMMAND_SCOREBOARD_TOGGLE = "tab.scoreboard.toggle";
@@ -138,17 +143,13 @@ public class TabConstants {
         public static final String TEST_PERMISSION = "tab.testpermission";
 
         public static final String GROUP_PREFIX = "tab.group.";
-
-        /**
-         * Private constructor to prevent the class from being instantiated
-         */
-        private Permission(){}
     }
 
     /**
      * Internal property names used to store text
      * under a specific key
      */
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
     public static class Property {
 
         public static final String HEADER = "header";
@@ -173,11 +174,6 @@ public class TabConstants {
 
         public static final String YELLOW_NUMBER = "yellow-number";
 
-        /**
-         * Private constructor to prevent the class from being instantiated
-         */
-        private Property() {}
-
         public static String bossbarTitle(String name) {
             return "bossbar-title-" + name;
         }
@@ -211,6 +207,7 @@ public class TabConstants {
      * Feature names used to register features under in the
      * feature manager which they can be retrieved by.
      */
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
     public static class Feature {
 
         //universal features
@@ -238,6 +235,7 @@ public class TabConstants {
         public static final String UNLIMITED_NAME_TAGS = "NameTagX";
         public static final String UNLIMITED_NAME_TAGS_PACKET_LISTENER = "nametagx-packet";
         public static final String UNLIMITED_NAME_TAGS_VEHICLE_REFRESHER = "nametagx-vehicle";
+        public static final String UNLIMITED_NAME_TAGS_GAMEMODE_LISTENER = "nametagx-gamemode";
 
         //Bukkit only
         public static final String PER_WORLD_PLAYER_LIST = "PerWorldPlayerList";
@@ -251,11 +249,6 @@ public class TabConstants {
         public static final String PACKET_SERIALIZING = "Packet serializing";
         public static final String PACKET_DESERIALIZING = "Packet deserializing";
 
-        /**
-         * Private constructor to prevent the class from being instantiated
-         */
-        private Feature(){}
-
         public static String scoreboardLine(String line) {
             return "scoreboard-" + line;
         }
@@ -288,6 +281,7 @@ public class TabConstants {
     /**
      * All internal placeholders offered by the plugin
      */
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
     public static class Placeholder {
 
         // Universal
@@ -329,6 +323,8 @@ public class TabConstants {
         public static final String VAULT_SUFFIX = "%vault-suffix%";
         public static final String HEALTH = "%health%";
 
+        public static final int MINIMUM_REFRESH_INTERVAL = 50;
+
         public static String condition(String name) {
             return "%condition:" + name + "%";
         }
@@ -336,17 +332,23 @@ public class TabConstants {
         public static String animation(String name) {
             return "%animation:" + name + "%";
         }
+
+        public static String globalPlayerListGroup(String group) {
+            return "%playerlist-group_" + group + "%";
+        }
     }
 
     /**
      * All plugins TAB hooks into
      */
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
     public static class Plugin {
 
         public static final String LUCKPERMS = "LuckPerms";
         public static final String VAULT = "Vault";
         public static final String PLACEHOLDER_API = "PlaceholderAPI";
         public static final String LIBS_DISGUISES = "LibsDisguises";
+        public static final String VIAREWIND = "ViaRewind";
         public static final String VIAVERSION = "ViaVersion";
         public static final String PROTOCOL_SUPPORT = "ProtocolSupport";
         public static final String ESSENTIALS = "Essentials";
@@ -357,6 +359,7 @@ public class TabConstants {
     /**
      * TAB's custom metrics charts
      */
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
     public static class MetricsChart {
 
         public static final String PERMISSION_SYSTEM = "permission_system";

api/src/main/java/me/neznamy/tab/api/TabFeature.java

@@ -2,6 +2,7 @@ package me.neznamy.tab.api;
 
 import java.util.*;
 
+import lombok.NonNull;
 import me.neznamy.tab.api.protocol.PacketPlayOutPlayerInfo;
 import me.neznamy.tab.api.protocol.PacketPlayOutScoreboardDisplayObjective;
 import me.neznamy.tab.api.protocol.PacketPlayOutScoreboardObjective;
@@ -13,12 +14,6 @@ import me.neznamy.tab.api.protocol.PacketPlayOutScoreboardObjective;
  */
 public abstract class TabFeature {
 
-    /** Feature's name displayed in /tab cpu */
-    private final String featureName;
-
-    /** Feature's function name displayed in place of refreshing in /tab cpu */
-    private final String refreshDisplayName;
-
     /** Servers where the feature is disabled (or enabled if using whitelist mode) */
     protected String[] disabledServers = new String[0];
 
@@ -43,19 +38,16 @@ public abstract class TabFeature {
     private final List<String> methodOverrides = new ArrayList<>();
 
     /**
-     * Constructs new instance with given parameters and loads method overrides
-     *
-     * @param   featureName
-     *          Feature's name in /tab cpu
-     * @param   refreshDisplayName
-     *          "refreshing" cpu display type name of the feature
+     * Constructs new instance and loads method overrides
      */
-    protected TabFeature(String featureName, String refreshDisplayName) {
-        this.featureName = featureName;
-        this.refreshDisplayName = refreshDisplayName;
+    protected TabFeature() {
         try {
             if (getClass().getMethod("onCommand", TabPlayer.class, String.class).getDeclaringClass() != TabFeature.class)
                 methodOverrides.add("onCommand");
+            if (getClass().getMethod("load").getDeclaringClass() != TabFeature.class)
+                methodOverrides.add("load");
+            if (getClass().getMethod("unload").getDeclaringClass() != TabFeature.class)
+                methodOverrides.add("unload");
             if (getClass().getMethod("onJoin", TabPlayer.class).getDeclaringClass() != TabFeature.class)
                 methodOverrides.add("onJoin");
             if (getClass().getMethod("onQuit", TabPlayer.class).getDeclaringClass() != TabFeature.class)
@@ -94,16 +86,12 @@ public abstract class TabFeature {
      * Also loads lists of disabled worlds and servers of this feature with config
      * section path specified with {@code configSection} parameter.
      *
-     * @param   featureName
-     *          Feature's name in /tab cpu
-     * @param   refreshDisplayName
-     *          "refreshing" cpu display type name of the feature
      * @param   configSection
      *          Configuration section of the feature to load disabled
      *          servers / worlds from
      */
-    protected TabFeature(String featureName, String refreshDisplayName, String configSection) {
-        this(featureName, refreshDisplayName);
+    protected TabFeature(@NonNull String configSection) {
+        this();
         List<String> disabledServers = TabAPI.getInstance().getConfig().getStringList(configSection + ".disable-in-servers");
         List<String> disabledWorlds = TabAPI.getInstance().getConfig().getStringList(configSection + ".disable-in-worlds");
         if (disabledServers != null) {
@@ -284,7 +272,7 @@ public abstract class TabFeature {
      * @param   player
      *          Player who changed vanish status
      */
-    public void onVanishStatusChange(TabPlayer player){
+    public void onVanishStatusChange(TabPlayer player) {
         //empty by default
     }
 
@@ -340,24 +328,6 @@ public abstract class TabFeature {
         return false;
     }
 
-    /**
-     * Returns name of the feature displayed in /tab cpu.
-     *
-     * @return  name of the feature displayed in /tab cpu
-     */
-    public String getFeatureName() {
-        return featureName;
-    }
-
-    /**
-     * Returns text to display in /tab cpu of this feature refreshing visuals
-     *
-     * @return  Text to display as refreshing of this feature
-     */
-    public String getRefreshDisplayName() {
-        return refreshDisplayName;
-    }
-
     /**
      * Returns {@code true} if method with specified name is overridden
      * in the implementation, {@code false} if not
@@ -405,4 +375,19 @@ public abstract class TabFeature {
     public void removeDisabledPlayer(TabPlayer p) {
         disabledPlayers.remove(p);
     }
+
+    /**
+     * Returns display name of {@link #refresh(TabPlayer, boolean)}
+     * called for this feature in /tab cpu
+     *
+     * @return  Display name of refresh function in this feature
+     */
+    public String getRefreshDisplayName() { return null; }
+
+    /**
+     * Returns name of this feature displayed in /tab cpu
+     *
+     * @return  name of this feature display in /tab cpu
+     */
+    public abstract String getFeatureName();
 }

api/src/main/java/me/neznamy/tab/api/TabPlayer.java

@@ -2,7 +2,6 @@ package me.neznamy.tab.api;
 
 import java.util.UUID;
 
-import io.netty.channel.Channel;
 import me.neznamy.tab.api.chat.IChatBaseComponent;
 import me.neznamy.tab.api.protocol.Skin;
 import me.neznamy.tab.api.protocol.TabPacket;
@@ -33,11 +32,11 @@ public interface TabPlayer {
 
     /**
      * Returns player's uuid used in TabList. This may only be different from real uuid if
-     * TAB is installed on velocity with some specific velocity setup
+     * TAB is installed on a proxy which does not rewrite UUIDs.
      *
      * @return  player's uuid in TabList
      */
-    UUID getTablistUUID();
+    UUID getTablistId();
 
     /**
      * Returns player's protocol version
@@ -141,13 +140,6 @@ public interface TabPlayer {
      */
     void sendMessage(IChatBaseComponent message);
 
-    /**
-     * Returns player's netty channel. On servers running version 1.7 or older returns {@code null}.
-     *
-     * @return  player's channel
-     */
-    Channel getChannel();
-
     /**
      * Returns player's ping calculated by server
      *
@@ -212,13 +204,6 @@ public interface TabPlayer {
      */
     String getTeamName();
 
-    /**
-     * Returns user-friendly explanation of team name
-     *
-     * @return  explanation behind team name
-     */
-    String getTeamNameNote();
-
     /**
      * Returns {@code true} if player is disguised using LibsDisguises, {@code false} if not
      *
@@ -310,12 +295,4 @@ public interface TabPlayer {
      * @return  player's game profile name as seen by other players
      */
     String getNickname();
-
-    /**
-     * Returns player's chat message signing key. Returned object is a direct
-     * object from the server, which is different per platform.
-     *
-     * @return  Player's direct chat message signing key
-     */
-    Object getProfilePublicKey();
 }

api/src/main/java/me/neznamy/tab/api/bossbar/BarStyle.java

@@ -1,10 +1,14 @@
 package me.neznamy.tab.api.bossbar;
 
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
 /**
  * An enum representing all available BossBar styles.
  * Calling ordinal() will return style's network ID.
  * Style names are equal to NMS names.
  */
+@AllArgsConstructor
 public enum BarStyle {
 
     PROGRESS("SOLID"),
@@ -14,23 +18,5 @@ public enum BarStyle {
     NOTCHED_20("SEGMENTED_20");
 
     /** Style's name used in Bukkit API */
-    private final String bukkitName;
-
-    /**
-     * Initializes enum constant with given bukkit name
-     *
-     * @param   bukkitName
-     *          Name of color to be returned in {@code getBukkitName()}
-     */
-    BarStyle(String bukkitName){
-        this.bukkitName = bukkitName;
-    }
-
-    /**
-     * Returns name of this style in Bukkit API
-     * @return  name of this style in Bukkit API
-     */
-    public String getBukkitName() {
-        return bukkitName;
-    }
+    @Getter private final String bukkitName;
 }

api/src/main/java/me/neznamy/tab/api/chat/ChatClickable.java

@@ -1,52 +1,19 @@
 package me.neznamy.tab.api.chat;
 
-import me.neznamy.tab.api.util.Preconditions;
+import lombok.Data;
+import lombok.NonNull;
 
 /**
  * Class for click event action in chat component
  */
+@Data
 public class ChatClickable {
 
     /** Click action */
-    private final EnumClickAction action;
+    @NonNull private final EnumClickAction action;
 
     /** Click value */
-    private final String value;
-
-    /**
-     * Constructs new instance with given action and value.
-     *
-     * @param   action
-     *          click event action
-     * @param   value
-     *          click event value
-     * @throws  IllegalArgumentException
-     *          if {@code action} is null or {@code value} is null
-     */
-    public ChatClickable(EnumClickAction action, String value) {
-        Preconditions.checkNotNull(action, "hover action");
-        Preconditions.checkNotNull(value, "hover value");
-        this.action = action;
-        this.value = value;
-    }
-
-    /**
-     * Returns click action defined in constructor
-     *
-     * @return  click action
-     */
-    public EnumClickAction getAction() {
-        return action;
-    }
-
-    /**
-     * Returns click action defined in constructor
-     *
-     * @return  click action
-     */
-    public String getValue() {
-        return value;
-    }
+    @NonNull private final String value;
 
     /**
      * Enum for all possible click actions

api/src/main/java/me/neznamy/tab/api/chat/ChatComponentEntity.java

@@ -1,22 +1,22 @@
 package me.neznamy.tab.api.chat;
 
+import lombok.NonNull;
+import me.neznamy.tab.api.TabAPI;
+
 import java.util.UUID;
 
-import com.google.gson.JsonObject;
-import me.neznamy.tab.api.util.Preconditions;
-
 public class ChatComponentEntity extends IChatBaseComponent {
 
-    private final String type;
-    private final UUID id;
-    private final String name;
-    
-    public ChatComponentEntity(String type, UUID id, String name) {
-        Preconditions.checkNotNull(type, "type");
-        Preconditions.checkNotNull(id, "id");
-        this.type = type;
-        this.id = id;
-        this.name = name;
+    private final String CONTENTS;
+    private final String VALUE_1_13;
+    private final String VALUE_1_12;
+    private final String VALUE_1_8;
+
+    public ChatComponentEntity(@NonNull String type, @NonNull UUID id, String name) {
+        this.CONTENTS = String.format("{\"type\":\"%s\",\"id\":\"%s\",\"name\":{\"text\":\"%s\"}}", type, id, name);
+        this.VALUE_1_13 = String.format("{type:\"%s\",id:\"%s\",name:\"{\\\"text\\\":\\\"%s\\\"}\"}", type, id, name);
+        this.VALUE_1_12 = String.format("{type:\"%s\",id:\"%s\",name:\"%s\"}", type, id, name);
+        this.VALUE_1_8 = String.format("{type:%s,id:%s,name:%s}", type, id, name);
     }
 
     @Override
@@ -26,16 +26,10 @@ public class ChatComponentEntity extends IChatBaseComponent {
     
     @Override
     public String toString() {
-        return String.format("{\"type\":\"%s\",\"id\":\"%s\",\"name\":{\"text\":\"%s\"}}", type, id, name);
-    }
-    
-    public JsonObject toJson() {
-        JsonObject json = new JsonObject();
-        json.addProperty("type", type);
-        json.addProperty("id", id.toString());
-        JsonObject json2 = new JsonObject();
-        json2.addProperty("text", name);
-        json.add("name", json2);
-        return json;
+        if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 16) return CONTENTS;
+        if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 13) return VALUE_1_13;
+        if (TabAPI.getInstance().getServerVersion().getMinorVersion() == 12) return VALUE_1_12;
+        if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 8) return VALUE_1_8;
+        throw new IllegalStateException("show_entity hover action is not supported on <1.8");
     }
 }

api/src/main/java/me/neznamy/tab/api/chat/ChatHoverable.java

@@ -1,60 +1,32 @@
 package me.neznamy.tab.api.chat;
 
-import me.neznamy.tab.api.util.Preconditions;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.Getter;
+import lombok.NonNull;
 
 /**
  * Class for hover event action in chat component
  */
+@Data
 public class ChatHoverable {
 
     /** Hover action */
-    private final EnumHoverAction action;
+    @NonNull private final EnumHoverAction action;
 
     /** Hover value */
-    private final IChatBaseComponent value;
-
-    /**
-     * Constructs new instance with given action and value.
-     *
-     * @param   action
-     *          hover event action
-     * @param   value
-     *          hover event value
-     * @throws  IllegalArgumentException
-     *          if {@code action} is null or {@code value} is null
-     */
-    public ChatHoverable(EnumHoverAction action, IChatBaseComponent value) {
-        Preconditions.checkNotNull(action, "hover action");
-        Preconditions.checkNotNull(value, "hover value");
-        this.action = action;
-        this.value = value;
-    }
-
-    /**
-     * Returns hover action defined in constructor
-     *
-     * @return  hover action
-     */
-    public EnumHoverAction getAction() {
-        return action;
-    }
-
-    /**
-     * Returns hover value defined in constructor
-     *
-     * @return  hover value
-     */
-    public IChatBaseComponent getValue() {
-        return value;
-    }
+    @NonNull private final IChatBaseComponent value;
 
     /**
      * Enum for all possible hover actions
      */
+    @AllArgsConstructor
     public enum EnumHoverAction {
 
-        SHOW_TEXT,
-        SHOW_ITEM,
-        SHOW_ENTITY
+        SHOW_TEXT("contents"),
+        SHOW_ITEM("value"),
+        SHOW_ENTITY("contents");
+
+        @Getter private final String preferredKey;
     }
 }

api/src/main/java/me/neznamy/tab/api/chat/ChatModifier.java

@@ -1,37 +1,31 @@
 package me.neznamy.tab.api.chat;
 
-import java.util.UUID;
-
-import me.neznamy.tab.api.util.Preconditions;
-import org.json.simple.JSONObject;
-
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.NonNull;
 import me.neznamy.tab.api.ProtocolVersion;
 import me.neznamy.tab.api.TabAPI;
 import me.neznamy.tab.api.chat.ChatClickable.EnumClickAction;
 import me.neznamy.tab.api.chat.ChatHoverable.EnumHoverAction;
+import org.json.simple.JSONObject;
 
+import java.util.UUID;
+
+@Data @NoArgsConstructor
 public class ChatModifier {
 
     private TextColor color;
-
     private Boolean bold;
     private Boolean italic;
     private Boolean underlined;
     private Boolean strikethrough;
     private Boolean obfuscated;
-
     private ChatClickable clickEvent;
     private ChatHoverable hoverEvent;
-
     private String font;
-
     private ProtocolVersion targetVersion;
 
-    public ChatModifier() {
-    }
-
-    public ChatModifier(ChatModifier modifier) {
-        Preconditions.checkNotNull(modifier, "modifier");
+    public ChatModifier(@NonNull ChatModifier modifier) {
         this.color = modifier.color == null ? null : new TextColor(modifier.color);
         this.bold = modifier.bold;
         this.italic = modifier.italic;
@@ -44,60 +38,13 @@ public class ChatModifier {
         this.targetVersion = modifier.targetVersion;
     }
 
-    public TextColor getColor() {
-        return color;
-    }
-
-    public void setColor(TextColor color) {
-        this.color = color;
-    }
-
-    public Boolean getBold() {
-        return bold;
-    }
-
-    public void setBold(Boolean bold) {
-        this.bold = bold;
-    }
-
-    public Boolean getItalic() {
-        return italic;
-    }
-
-    public void setItalic(Boolean italic) {
-        this.italic = italic;
-    }
-
-    public Boolean getUnderlined() {
-        return underlined;
-    }
-
-    public void setUnderlined(Boolean underlined) {
-        this.underlined = underlined;
-    }
-
-    public Boolean getStrikethrough() {
-        return strikethrough;
-    }
-
-    public void setStrikethrough(Boolean strikethrough) {
-        this.strikethrough = strikethrough;
-    }
-
-    public Boolean getObfuscated() {
-        return obfuscated;
-    }
-
-    public void setObfuscated(Boolean obfuscated) {
-        this.obfuscated = obfuscated;
-    }
 
     /**
      * Returns true if bold is defined and set to true, false otherwise
      *
      * @return  true if bold is defined and set to true, false otherwise
      */
-    public boolean isBold(){
+    public boolean isBold() {
         return Boolean.TRUE.equals(bold);
     }
 
@@ -106,7 +53,7 @@ public class ChatModifier {
      *
      * @return  true if italic is defined and set to true, false otherwise
      */
-    public boolean isItalic(){
+    public boolean isItalic() {
         return Boolean.TRUE.equals(italic);
     }
 
@@ -115,7 +62,7 @@ public class ChatModifier {
      *
      * @return  true if underlined is defined and set to true, false otherwise
      */
-    public boolean isUnderlined(){
+    public boolean isUnderlined() {
         return Boolean.TRUE.equals(underlined);
     }
 
@@ -124,7 +71,7 @@ public class ChatModifier {
      *
      * @return  true if strikethrough is defined and set to true, false otherwise
      */
-    public boolean isStrikethrough(){
+    public boolean isStrikethrough() {
         return Boolean.TRUE.equals(strikethrough);
     }
 
@@ -133,34 +80,17 @@ public class ChatModifier {
      *
      * @return  true if obfuscation is defined and set to true, false otherwise
      */
-    public boolean isObfuscated(){
+    public boolean isObfuscated() {
         return Boolean.TRUE.equals(obfuscated);
     }
 
-    public ChatClickable getClickEvent() {
-        return clickEvent;
-    }
-
-    public void setClickEvent(ChatClickable clickEvent) {
-        this.clickEvent = clickEvent;
-    }
-
-    public ChatHoverable getHoverEvent() {
-        return hoverEvent;
-    }
-
-    public void setHoverEvent(ChatHoverable hoverEvent) {
-        this.hoverEvent = hoverEvent;
-    }
-
     /**
      * Sets click action to OPEN_URL and url to given value
      *
      * @param   url
      *          url to open
      */
-    public void onClickOpenUrl(String url) {
-        Preconditions.checkNotNull(url, "url");
+    public void onClickOpenUrl(@NonNull String url) {
         clickEvent = new ChatClickable(EnumClickAction.OPEN_URL, url);
     }
 
@@ -170,8 +100,7 @@ public class ChatModifier {
      * @param   command
      *          command to perform, might be without / to send a chat message
      */
-    public void onClickRunCommand(String command) {
-        Preconditions.checkNotNull(command, "command");
+    public void onClickRunCommand(@NonNull String command) {
         clickEvent = new ChatClickable(EnumClickAction.RUN_COMMAND, command);
     }
 
@@ -181,8 +110,7 @@ public class ChatModifier {
      * @param   command
      *          command to suggest
      */
-    public void onClickSuggestCommand(String command) {
-        Preconditions.checkNotNull(command, "command");
+    public void onClickSuggestCommand(@NonNull String command) {
         clickEvent = new ChatClickable(EnumClickAction.SUGGEST_COMMAND, command);
     }
 
@@ -203,14 +131,11 @@ public class ChatModifier {
      * @param   text
      *          text to copy to clipboard on click
      */
-    public void onClickCopyToClipBoard(String text) {
-        Preconditions.checkNotNull(text, "text");
+    public void onClickCopyToClipBoard(@NonNull String text) {
         clickEvent = new ChatClickable(EnumClickAction.COPY_TO_CLIPBOARD, text);
     }
 
-    public void onClick(EnumClickAction action, String value) {
-        Preconditions.checkNotNull(action, "action");
-        Preconditions.checkNotNull(value, "value");
+    public void onClick(@NonNull EnumClickAction action, @NonNull String value) {
         clickEvent = new ChatClickable(action, value);
     }
 
@@ -220,8 +145,7 @@ public class ChatModifier {
      * @param   text
      *          text to show
      */
-    public void onHoverShowText(IChatBaseComponent text) {
-        Preconditions.checkNotNull(text, "text");
+    public void onHoverShowText(@NonNull IChatBaseComponent text) {
         hoverEvent = new ChatHoverable(EnumHoverAction.SHOW_TEXT, text);
     }
 
@@ -231,8 +155,7 @@ public class ChatModifier {
      * @param   serializedItem
      *          item to show
      */
-    public void onHoverShowItem(String serializedItem) {
-        Preconditions.checkNotNull(serializedItem, "item");
+    public void onHoverShowItem(@NonNull String serializedItem) {
         hoverEvent = new ChatHoverable(EnumHoverAction.SHOW_ITEM, new IChatBaseComponent(serializedItem));
     }
 
@@ -246,36 +169,14 @@ public class ChatModifier {
      * @param   name
      *          entity custom name
      */
-    public void onHoverShowEntity(String type, UUID id, String name) {
-        Preconditions.checkNotNull(type, "type");
-        Preconditions.checkNotNull(id, "id");
-        if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 16) {
-            hoverEvent = new ChatHoverable(EnumHoverAction.SHOW_ENTITY, new ChatComponentEntity(type, id, name));
-        } else if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 13) {
-            hoverEvent = new ChatHoverable(EnumHoverAction.SHOW_ENTITY, new IChatBaseComponent(String.format("{type:\"%s\",id:\"%s\",name:\"{\\\"text\\\":\\\"%s\\\"}\"}", type, id, name)));
-        } else if (TabAPI.getInstance().getServerVersion().getMinorVersion() == 12) {
-            hoverEvent = new ChatHoverable(EnumHoverAction.SHOW_ENTITY, new IChatBaseComponent(String.format("{type:\"%s\",id:\"%s\",name:\"%s\"}", type, id, name)));
-        } else if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 8) {
-            hoverEvent = new ChatHoverable(EnumHoverAction.SHOW_ENTITY, new IChatBaseComponent(String.format("{type:%s,id:%s,name:%s}", type, id, name)));
-        } else {
-            throw new IllegalStateException("show_entity hover action is not supported on <1.8");
-        }
+    public void onHoverShowEntity(@NonNull String type, @NonNull UUID id, String name) {
+        hoverEvent = new ChatHoverable(EnumHoverAction.SHOW_ENTITY, new ChatComponentEntity(type, id, name));
     }
 
-    public void onHover(EnumHoverAction action, IChatBaseComponent value) {
-        Preconditions.checkNotNull(action, "action");
-        Preconditions.checkNotNull(value, "value");
+    public void onHover(@NonNull EnumHoverAction action, @NonNull IChatBaseComponent value) {
         hoverEvent = new ChatHoverable(action, value);
     }
 
-    public String getFont() {
-        return font;
-    }
-
-    public void setFont(String font) {
-        this.font = font;
-    }
-
     @SuppressWarnings("unchecked")
     public JSONObject serialize() {
         JSONObject json = new JSONObject();
@@ -295,7 +196,7 @@ public class ChatModifier {
             JSONObject hover = new JSONObject();
             hover.put("action", hoverEvent.getAction().toString().toLowerCase());
             if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 16) {
-                hover.put("contents", hoverEvent.getValue());
+                hover.put(hoverEvent.getAction().getPreferredKey(), hoverEvent.getValue());
             } else {
                 hover.put("value", TabAPI.getInstance().getServerVersion().getMinorVersion() >= 9 ?
                         hoverEvent.getValue() : hoverEvent.getValue().toRawText());
@@ -315,12 +216,4 @@ public class ChatModifier {
         if (isObfuscated()) builder.append(EnumChatFormat.OBFUSCATED.getFormat());
         return builder.toString();
     }
-
-    public void setTargetVersion(ProtocolVersion targetVersion) {
-        this.targetVersion = targetVersion;
-    }
-
-    public ProtocolVersion getTargetVersion() {
-        return targetVersion;
-    }
 }

api/src/main/java/me/neznamy/tab/api/chat/DeserializedChatComponent.java

@@ -1,8 +1,10 @@
 package me.neznamy.tab.api.chat;
 
+import lombok.NonNull;
+import lombok.RequiredArgsConstructor;
 import me.neznamy.tab.api.ProtocolVersion;
 import me.neznamy.tab.api.TabAPI;
-import me.neznamy.tab.api.util.Preconditions;
+import org.jetbrains.annotations.NotNull;
 import org.json.simple.JSONObject;
 import org.json.simple.parser.JSONParser;
 import org.json.simple.parser.ParseException;
@@ -23,10 +25,11 @@ import java.util.List;
  * will act like a normal chat component.
  */
 @SuppressWarnings("unchecked")
+@RequiredArgsConstructor
 public class DeserializedChatComponent extends IChatBaseComponent {
 
     /** The original serialized component string */
-    private final String json;
+    @NonNull private final String json;
 
     /**
      * Flag tracking whether this component was fully deserialized
@@ -41,17 +44,6 @@ public class DeserializedChatComponent extends IChatBaseComponent {
      */
     private boolean modified;
 
-    /**
-     * Constructs new instance with given parameter
-     *
-     * @param   json
-     *          serialized component as string
-     */
-    public DeserializedChatComponent(String json) {
-        Preconditions.checkNotNull(json, "json");
-        this.json = json;
-    }
-
     @Override
     public String toString() {
         if (modified) return super.toString();
@@ -65,7 +57,7 @@ public class DeserializedChatComponent extends IChatBaseComponent {
     }
 
     @Override
-    public List<IChatBaseComponent> getExtra(){
+    public List<IChatBaseComponent> getExtra() {
         if (!deserialized) deserialize();
         return super.getExtra();
     }
@@ -77,27 +69,27 @@ public class DeserializedChatComponent extends IChatBaseComponent {
     }
 
     @Override
-    public ChatModifier getModifier() {
+    public @NotNull ChatModifier getModifier() {
         if (!deserialized) deserialize();
         return super.getModifier();
     }
 
     @Override
-    public IChatBaseComponent setExtra(List<IChatBaseComponent> components){
+    public IChatBaseComponent setExtra(List<IChatBaseComponent> components) {
         if (!deserialized) deserialize();
         modified = true;
         return super.setExtra(components);
     }
 
     @Override
-    public void addExtra(IChatBaseComponent child) {
+    public void addExtra(@NotNull IChatBaseComponent child) {
         if (!deserialized) deserialize();
         modified = true;
         super.addExtra(child);
     }
 
     @Override
-    public void setModifier(ChatModifier modifier) {
+    public void setModifier(@NotNull ChatModifier modifier) {
         if (!deserialized) deserialize();
         modified = true;
         super.setModifier(modifier);
@@ -162,9 +154,7 @@ public class DeserializedChatComponent extends IChatBaseComponent {
      *          name of key
      * @return  value from json object or null if not present
      */
-    private static Boolean getBoolean(JSONObject jsonObject, String key) {
-        Preconditions.checkNotNull(jsonObject, "json object");
-        Preconditions.checkNotNull(key, "key");
+    private static Boolean getBoolean(@NonNull JSONObject jsonObject, @NonNull String key) {
         String value = String.valueOf(jsonObject.getOrDefault(key, null));
         return "null".equals(value) ? null : Boolean.parseBoolean(value);
     }

api/src/main/java/me/neznamy/tab/api/chat/EnumChatFormat.java

@@ -1,5 +1,6 @@
 package me.neznamy.tab.api.chat;
 
+import lombok.Getter;
 import me.neznamy.tab.api.chat.rgb.RGBUtils;
 
 /**
@@ -40,22 +41,22 @@ public enum EnumChatFormat {
     public static final String COLOR_STRING = String.valueOf(COLOR_CHAR);
 
     /** Character representing the color or magic code */
-    private final char character;
+    @Getter private final char character;
 
     /** Red value of this constant, 0 for magic codes */
-    private final short red;
+    @Getter private final short red;
 
     /** Green value of this constant, 0 for magic codes */
-    private final short green;
+    @Getter private final short green;
 
     /** Blue value of this constant, 0 for magic codes */
-    private final short blue;
+    @Getter private final short blue;
 
     /** Color as 6-digit hex code, null for magic codes */
-    private final String hexCode;
+    @Getter private final String hexCode;
 
     /** Color symbol followed by constant's character */
-    private final String chatFormat;
+    @Getter private final String format;
 
     /**
      * Constructs new color instance with given character and hex code
@@ -67,7 +68,7 @@ public enum EnumChatFormat {
      */
     EnumChatFormat(char character, String hexCode) {
         this.character = character;
-        this.chatFormat = String.valueOf(COLOR_CHAR) + character;
+        this.format = String.valueOf(COLOR_CHAR) + character;
         this.hexCode = hexCode;
         int hexColor = Integer.parseInt(hexCode, 16);
         red = (short) ((hexColor >> 16) & 0xFF);
@@ -83,40 +84,13 @@ public enum EnumChatFormat {
      */
     EnumChatFormat(char character) {
         this.character = character;
-        this.chatFormat = String.valueOf(COLOR_CHAR) + character;
+        this.format = String.valueOf(COLOR_CHAR) + character;
         red = 0;
         green = 0;
         blue = 0;
         hexCode = null;
     }
 
-    /**
-     * Returns red value of this color code
-     *
-     * @return  red value
-     */
-    public short getRed() {
-        return red;
-    }
-
-    /**
-     * Returns green value of this color code
-     *
-     * @return  green value
-     */
-    public short getGreen() {
-        return green;
-    }
-
-    /**
-     * Returns blue value of this color code
-     *
-     * @return  blue value
-     */
-    public short getBlue() {
-        return blue;
-    }
-
     /**
      * Returns enum value based on provided character or null if character is not valid
      *
@@ -152,33 +126,6 @@ public enum EnumChatFormat {
         return EnumChatFormat.WHITE;
     }
 
-    /**
-     * Returns color char followed by color's character
-     *
-     * @return  color char followed by color's character
-     */
-    public String getFormat() {
-        return chatFormat;
-    }
-
-    /**
-     * Returns character representing this color
-     *
-     * @return  character representing this color
-     */
-    public char getCharacter() {
-        return character;
-    }
-
-    /**
-     * Returns hex code of this format, null if this is a magic code
-     *
-     * @return  hex code of this format
-     */
-    public String getHexCode() {
-        return hexCode;
-    }
-
     /**
      * Returns enum value with exact red, green and blue values or null if no match was found
      *
@@ -190,7 +137,7 @@ public enum EnumChatFormat {
      *          exact blue value
      * @return  enum value or null if no such combination exists
      */
-    public static EnumChatFormat fromRGBExact(int red, int green, int blue){
+    public static EnumChatFormat fromRGBExact(int red, int green, int blue) {
         for (EnumChatFormat format : VALUES) {
             if (format.red == red && format.green == green && format.blue == blue) return format;
         }
@@ -205,12 +152,12 @@ public enum EnumChatFormat {
      *          text to replace color symbol in
      * @return  colorized string from provided text
      */
-    public static String color(String textToTranslate){
+    public static String color(String textToTranslate) {
         if (textToTranslate == null) return null;
         if (!textToTranslate.contains("&")) return textToTranslate;
         char[] b = textToTranslate.toCharArray();
         for (int i = 0; i < b.length - 1; i++) {
-            if ((b[i] == '&') && ("0123456789AaBbCcDdEeFfKkLlMmNnOoRrXx".indexOf(b[(i + 1)]) > -1)){
+            if ((b[i] == '&') && ("0123456789AaBbCcDdEeFfKkLlMmNnOoRrXx".indexOf(b[(i + 1)]) > -1)) {
                 b[i] = COLOR_CHAR;
                 b[(i + 1)] = Character.toLowerCase(b[(i + 1)]);
             }
@@ -242,9 +189,9 @@ public enum EnumChatFormat {
         if (input == null) return "";
         StringBuilder result = new StringBuilder();
         int length = input.length();
-        for (int index = length - 1; index > -1; index--){
+        for (int index = length - 1; index > -1; index--) {
             char section = input.charAt(index);
-            if ((section == COLOR_CHAR || section == '&') && (index < length - 1)){
+            if ((section == COLOR_CHAR || section == '&') && (index < length - 1)) {
                 char c = input.charAt(index + 1);
                 if ("0123456789AaBbCcDdEeFfKkLlMmNnOoRr".contains(String.valueOf(c))) {
                     result.insert(0, COLOR_CHAR);

api/src/main/java/me/neznamy/tab/api/chat/IChatBaseComponent.java

@@ -1,9 +1,13 @@
 package me.neznamy.tab.api.chat;
 
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.NonNull;
+import lombok.Setter;
 import me.neznamy.tab.api.ProtocolVersion;
 import me.neznamy.tab.api.TabAPI;
 import me.neznamy.tab.api.chat.rgb.RGBUtils;
-import me.neznamy.tab.api.util.Preconditions;
+import me.neznamy.tab.api.util.ComponentCache;
 import org.json.simple.JSONObject;
 
 import java.util.*;
@@ -12,39 +16,37 @@ import java.util.*;
  * A class representing the n.m.s.IChatBaseComponent class to make work with it much easier
  */
 @SuppressWarnings("unchecked")
+@NoArgsConstructor
 public class IChatBaseComponent {
 
     /**
      * Component cache maps to avoid large memory allocations as well as
      * higher CPU usage when using animations which send the same text on repeat.
      */
-    private static final Map<String, IChatBaseComponent> componentCache = new HashMap<>();
-    private static final Map<IChatBaseComponent, String> serializeCacheModern = new HashMap<>();
-    private static final Map<IChatBaseComponent, String> serializeCacheLegacy = new HashMap<>();
+    private static final ComponentCache<String, IChatBaseComponent> stringCache = new ComponentCache<>(10000, (text, clientVersion) -> {
+                return text.contains("#") || text.contains("&x") || text.contains(EnumChatFormat.COLOR_CHAR + "x") || text.contains("<") ?
+                    IChatBaseComponent.fromColoredText(text) : //contains RGB colors
+                    new IChatBaseComponent(text); //no RGB
+            });
+    private static final ComponentCache<IChatBaseComponent, String> serializeCache = new ComponentCache<>(10000,
+            (component, clientVersion) -> component.toString());
 
     /** Text of the component */
-    private String text;
+    @Getter @Setter private String text;
 
     /** Chat modifier containing color, magic codes, hover and click event */
-    private ChatModifier modifier = new ChatModifier();
+    @Getter @Setter @NonNull private ChatModifier modifier = new ChatModifier();
 
     /** Extra components used in "extra" field */
     private List<IChatBaseComponent> extra;
 
-    /**
-     * Constructs a new empty component
-     */
-    public IChatBaseComponent() {
-    }
-    
     /**
      * Constructs a new component which is a clone of provided component
      *
      * @param   component
      *          component to clone
      */
-    public IChatBaseComponent(IChatBaseComponent component) {
-        Preconditions.checkNotNull(component, "component");
+    public IChatBaseComponent(@NonNull IChatBaseComponent component) {
         this.text = component.text;
         this.modifier = new ChatModifier(component.modifier);
         for (IChatBaseComponent child : component.getExtra()) {
@@ -67,7 +69,7 @@ public class IChatBaseComponent {
      *
      * @return  list of extra components
      */
-    public List<IChatBaseComponent> getExtra(){
+    public List<IChatBaseComponent> getExtra() {
         if (extra == null) return Collections.emptyList();
         return extra;
     }
@@ -81,7 +83,7 @@ public class IChatBaseComponent {
      * @throws  IllegalArgumentException
      *          if {@code components} is an empty list
      */
-    public IChatBaseComponent setExtra(List<IChatBaseComponent> components){
+    public IChatBaseComponent setExtra(List<IChatBaseComponent> components) {
         if (components.isEmpty()) throw new IllegalArgumentException("Unexpected empty array of components"); //exception taken from minecraft
         this.extra = components;
         return this;
@@ -93,53 +95,11 @@ public class IChatBaseComponent {
      * @param   child
      *          component to append
      */
-    public void addExtra(IChatBaseComponent child) {
-        Preconditions.checkNotNull(child, "extra");
+    public void addExtra(@NonNull IChatBaseComponent child) {
         if (extra == null) extra = new ArrayList<>();
         extra.add(child);
     }
 
-    /**
-     * Returns text of this component
-     *
-     * @return  text of this component
-     */
-    public String getText() {
-        return text;
-    }
-
-    /**
-     * Returns chat modifier of this component
-     *
-     * @return  chat modifier of this component
-     */
-    public ChatModifier getModifier() {
-        return modifier;
-    }
-
-    /**
-     * Sets modifier to provided value
-     *
-     * @param   modifier
-     *          modifier to set value to
-     * @throws  IllegalArgumentException
-     *          if {@code modifier} is null
-     */
-    public void setModifier(ChatModifier modifier) {
-        Preconditions.checkNotNull(modifier, "modifier");
-        this.modifier = modifier;
-    }
-
-    /**
-     * Changes text of this component
-     *
-     * @param   text
-     *          text to show
-     */
-    public void setText(String text) {
-        this.text = text;
-    }
-
     /**
      * Deserializes string and returns created component. If provided string is null, returns null.
      *
@@ -207,19 +167,7 @@ public class IChatBaseComponent {
         for (IChatBaseComponent child : getExtra()) {
             child.modifier.setTargetVersion(clientVersion);
         }
-        String string;
-        if (clientVersion.getMinorVersion() >= 16) {
-            if (serializeCacheModern.containsKey(this)) return serializeCacheModern.get(this);
-            string = toString();
-            if (serializeCacheModern.size() > 10000) serializeCacheModern.clear();
-            serializeCacheModern.put(this, string);
-        } else {
-            if (serializeCacheLegacy.containsKey(this)) return serializeCacheLegacy.get(this);
-            string = toString();
-            if (serializeCacheLegacy.size() > 10000) serializeCacheLegacy.clear();
-            serializeCacheLegacy.put(this, string);
-        }
-        return string;
+        return serializeCache.get(this, clientVersion);
     }
 
     /**
@@ -229,15 +177,14 @@ public class IChatBaseComponent {
      *          text to convert
      * @return  organized component from colored text
      */
-    public static IChatBaseComponent fromColoredText(String originalText){
-        Preconditions.checkNotNull(originalText, "text");
+    public static IChatBaseComponent fromColoredText(@NonNull String originalText) {
         String text = RGBUtils.getInstance().applyFormats(EnumChatFormat.color(originalText));
         List<IChatBaseComponent> components = new ArrayList<>();
         StringBuilder builder = new StringBuilder();
         IChatBaseComponent component = new IChatBaseComponent();
-        for (int i = 0; i < text.length(); i++){
+        for (int i = 0; i < text.length(); i++) {
             char c = text.charAt(i);
-            if (c == EnumChatFormat.COLOR_CHAR){
+            if (c == EnumChatFormat.COLOR_CHAR) {
                 i++;
                 if (i >= text.length()) {
                     break;
@@ -247,7 +194,7 @@ public class IChatBaseComponent {
                     c = (char)(c + ' ');
                 }
                 EnumChatFormat format = EnumChatFormat.getByChar(c);
-                if (format != null){
+                if (format != null) {
                     if (builder.length() > 0) {
                         component.setText(builder.toString());
                         components.add(component);
@@ -255,7 +202,7 @@ public class IChatBaseComponent {
                         component.text = null;
                         builder = new StringBuilder();
                     }
-                    switch (format){
+                    switch (format) {
                     case BOLD: 
                         component.modifier.setBold(true);
                         break;
@@ -281,7 +228,7 @@ public class IChatBaseComponent {
                         break;
                     }
                 }
-            } else if (c == '#' && text.length() > i+6){
+            } else if (c == '#' && text.length() > i+6) {
                 String hex = text.substring(i+1, i+7);
                 if (RGBUtils.getInstance().isHexCode(hex)) {
                     TextColor color;
@@ -292,7 +239,7 @@ public class IChatBaseComponent {
                         color = new TextColor(hex);
                         i += 6;
                     }
-                    if (builder.length() > 0){
+                    if (builder.length() > 0) {
                         component.setText(builder.toString());
                         components.add(component);
                         builder = new StringBuilder();
@@ -420,19 +367,7 @@ public class IChatBaseComponent {
      *          text to create component from
      * @return  The most performance-optimized component based on text
      */
-    public static IChatBaseComponent optimizedComponent(String text){
-        if (text == null) return null;
-        if (componentCache.containsKey(text)) return componentCache.get(text);
-        IChatBaseComponent component;
-        if (text.contains("#") || text.contains("&x") || text.contains(EnumChatFormat.COLOR_CHAR + "x") || text.contains("<")){
-            //contains RGB colors
-            component = IChatBaseComponent.fromColoredText(text);
-        } else {
-            //no RGB
-            component = new IChatBaseComponent(text);
-        }
-        if (componentCache.size() > 10000) componentCache.clear();
-        componentCache.put(text, component);
-        return component;
+    public static IChatBaseComponent optimizedComponent(String text) {
+        return stringCache.get(text, null);
     }
 }

api/src/main/java/me/neznamy/tab/api/chat/TextColor.java

@@ -1,5 +1,7 @@
 package me.neznamy.tab.api.chat;
 
+import lombok.Getter;
+import lombok.NonNull;
 import me.neznamy.tab.api.util.Preconditions;
 
 /**
@@ -24,7 +26,7 @@ public class TextColor {
      * Boolean value whether the legacy color was forced with constructor or should be
      * automatically assigned as closest color.
      * This value is used in gradients when converting text for legacy players. */
-    private boolean legacyColorForced;
+    @Getter private boolean legacyColorForced;
 
     /**
      * Constructs new instance as a clone of the provided color.
@@ -34,8 +36,7 @@ public class TextColor {
      * @throws  IllegalArgumentException
      *          if color is {@code null}
      */
-    public TextColor(TextColor color) {
-        Preconditions.checkNotNull(color, "color");
+    public TextColor(@NonNull TextColor color) {
         rgb = color.rgb;
         legacyColor = color.legacyColor;
         hexCode = color.hexCode;
@@ -50,8 +51,7 @@ public class TextColor {
      * @throws  IllegalArgumentException
      *          if hexCode is {@code null}
      */
-    public TextColor(String hexCode) {
-        Preconditions.checkNotNull(hexCode, "hex code");
+    public TextColor(@NonNull String hexCode) {
         this.hexCode = hexCode;
     }
 
@@ -65,9 +65,7 @@ public class TextColor {
      * @throws  IllegalArgumentException
      *          if {@code hexCode} is {@code null} or {@code legacyColor} is {@code null}
      */
-    public TextColor(String hexCode, EnumChatFormat legacyColor) {
-        Preconditions.checkNotNull(hexCode, "hex code");
-        Preconditions.checkNotNull(legacyColor, "legacy color");
+    public TextColor(@NonNull String hexCode, EnumChatFormat legacyColor) {
         this.hexCode = hexCode;
         this.legacyColorForced = true;
         this.legacyColor = legacyColor;
@@ -81,8 +79,7 @@ public class TextColor {
      * @throws  IllegalArgumentException
      *          if {@code legacyColor} is {@code null}
      */
-    public TextColor(EnumChatFormat legacyColor) {
-        Preconditions.checkNotNull(legacyColor, "legacy color");
+    public TextColor(@NonNull EnumChatFormat legacyColor) {
         this.rgb = (legacyColor.getRed() << 16) + (legacyColor.getGreen() << 8) + legacyColor.getBlue();
         this.hexCode = legacyColor.getHexCode();
     }
@@ -195,15 +192,6 @@ public class TextColor {
         return "#" + getHexCode();
     }
 
-    /**
-     * Returns true if legacy color was forced with a constructor, false if not
-     *
-     * @return  true if forced, false if not
-     */
-    public boolean isLegacyColorForced() {
-        return legacyColorForced;
-    }
-
     /**
      * Reads the string as it appears in chat component and turns it into the color object.
      * If the entered string is null, returns null.

api/src/main/java/me/neznamy/tab/api/chat/WrappedChatComponent.java

@@ -1,6 +1,10 @@
 package me.neznamy.tab.api.chat;
 
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NonNull;
 import me.neznamy.tab.api.ProtocolVersion;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
@@ -10,28 +14,11 @@ import java.util.List;
  * slows down the performance, as well as makes code more complicated
  * and open to problems.
  */
+@AllArgsConstructor
 public class WrappedChatComponent extends IChatBaseComponent {
 
     /** Original NMS component */
-    private final Object originalComponent;
-
-    /**
-     * Constructs new instance with given parameter
-     *
-     * @param   originalComponent
-     *          Original NMS component
-     */
-    public WrappedChatComponent(Object originalComponent) {
-        this.originalComponent = originalComponent;
-    }
-
-    /**
-     * Returns the original NMS component
-     * @return  the original NMS component
-     */
-    public Object get() {
-        return originalComponent;
-    }
+    @Getter private final Object originalComponent;
 
     @Override
     public String toString() {
@@ -44,7 +31,7 @@ public class WrappedChatComponent extends IChatBaseComponent {
     }
 
     @Override
-    public List<IChatBaseComponent> getExtra(){
+    public List<IChatBaseComponent> getExtra() {
         throw new UnsupportedOperationException("Not supported for " + getClass().getSimpleName());
     }
 
@@ -54,22 +41,22 @@ public class WrappedChatComponent extends IChatBaseComponent {
     }
 
     @Override
-    public ChatModifier getModifier() {
+    public @NotNull ChatModifier getModifier() {
         throw new UnsupportedOperationException("Not supported for " + getClass().getSimpleName());
     }
 
     @Override
-    public IChatBaseComponent setExtra(List<IChatBaseComponent> components){
+    public IChatBaseComponent setExtra(List<IChatBaseComponent> components) {
         throw new UnsupportedOperationException("Not supported for " + getClass().getSimpleName());
     }
 
     @Override
-    public void addExtra(IChatBaseComponent child) {
+    public void addExtra(@NonNull IChatBaseComponent child) {
         throw new UnsupportedOperationException("Not supported for " + getClass().getSimpleName());
     }
 
     @Override
-    public void setModifier(ChatModifier modifier) {
+    public void setModifier(@NotNull ChatModifier modifier) {
         throw new UnsupportedOperationException("Not supported for " + getClass().getSimpleName());
     }
 }

api/src/main/java/me/neznamy/tab/api/chat/rgb/RGBUtils.java

@@ -1,18 +1,20 @@
 package me.neznamy.tab.api.chat.rgb;
 
-import java.util.ArrayList;
-import java.util.List;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
+import lombok.Getter;
+import lombok.NonNull;
 import me.neznamy.tab.api.chat.EnumChatFormat;
-import me.neznamy.tab.api.chat.TextColor;
+import me.neznamy.tab.api.chat.IChatBaseComponent;
 import me.neznamy.tab.api.chat.rgb.format.*;
 import me.neznamy.tab.api.chat.rgb.gradient.CMIGradient;
 import me.neznamy.tab.api.chat.rgb.gradient.CommonGradient;
 import me.neznamy.tab.api.chat.rgb.gradient.GradientPattern;
 import me.neznamy.tab.api.chat.rgb.gradient.KyoriGradient;
-import me.neznamy.tab.api.util.Preconditions;
+import me.neznamy.tab.api.util.ReflectionUtils;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 /**
  * A helper class to reformat all RGB formats into the default #RRGGBB and apply gradients
@@ -20,7 +22,7 @@ import me.neznamy.tab.api.util.Preconditions;
 public class RGBUtils {
 
     /** Instance of the class */
-    private static final RGBUtils instance = new RGBUtils();
+    @Getter private static final RGBUtils instance = new RGBUtils();
 
     /** Registered RGB formatters */
     private final RGBFormatter[] formats;
@@ -39,15 +41,14 @@ public class RGBUtils {
      */
     public RGBUtils() {
         List<RGBFormatter> list = new ArrayList<>();
+        if (ReflectionUtils.classExists("net.kyori.adventure.text.minimessage.MiniMessage")) {
+            list.add(new MiniMessageFormat());
+        }
         list.add(new BukkitFormat());
         list.add(new CMIFormat());
         list.add(new UnnamedFormat1());
         list.add(new HtmlFormat());
         list.add(new KyoriFormat());
-        try {
-            Class.forName("net.kyori.adventure.text.minimessage.MiniMessage");
-            list.add(new MiniMessageFormat());
-        } catch (ClassNotFoundException ignored) {}
         formats = list.toArray(new RGBFormatter[0]);
 
         gradients = new GradientPattern[] {
@@ -65,15 +66,6 @@ public class RGBUtils {
         };
     }
 
-    /**
-     * Returns instance of this class
-     *
-     * @return  instance
-     */
-    public static RGBUtils getInstance() {
-        return instance;
-    }
-
     /**
      * Applies all RGB formats and gradients to text and returns it.
      *
@@ -81,8 +73,7 @@ public class RGBUtils {
      *          original text
      * @return  text where everything is converted to #RRGGBB
      */
-    public String applyFormats(String text) {
-        Preconditions.checkNotNull(text, "text");
+    public String applyFormats(@NonNull String text) {
         String replaced = text;
         for (GradientPattern pattern : gradients) {
             replaced = pattern.applyPattern(replaced, false);
@@ -101,8 +92,7 @@ public class RGBUtils {
      *          original text
      * @return  text where all gradients with static text are converted to #RRGGBB
      */
-    public String applyCleanGradients(String text) {
-        Preconditions.checkNotNull(text, "text");
+    public String applyCleanGradients(@NonNull String text) {
         String replaced = text;
         for (GradientPattern pattern : gradients) {
             replaced = pattern.applyPattern(replaced, true);
@@ -142,7 +132,9 @@ public class RGBUtils {
     }
 
     /**
-     * Converts all hex codes in given string to legacy codes
+     * Converts all hex codes in given string to legacy codes.
+     * Also removes redundant color codes caused by this operation
+     * to properly fit in limits.
      *
      * @param   text
      *          text to convert
@@ -150,29 +142,7 @@ public class RGBUtils {
      */
     public String convertRGBtoLegacy(String text) {
         if (text == null) return null;
-        if (!text.contains("#")) return EnumChatFormat.color(text);
-        String applied = applyFormats(text);
-        StringBuilder sb = new StringBuilder();
-        for (int i = 0; i < applied.length(); i++){
-            char c = applied.charAt(i);
-            if (c == '#' && applied.length() > i+6) {
-                String hexCode = applied.substring(i+1, i+7);
-                if (isHexCode(hexCode)) {
-                    if (containsLegacyCode(applied, i)) {
-                        sb.append(new TextColor(hexCode, EnumChatFormat.getByChar(applied.charAt(i+8))).getLegacyColor().getFormat());
-                        i += 8;
-                    } else {
-                        sb.append(new TextColor(hexCode).getLegacyColor().getFormat());
-                        i += 6;
-                    }
-                } else {
-                    sb.append(c);
-                }
-            } else {
-                sb.append(c);
-            }
-        }
-        return sb.toString();
+        return IChatBaseComponent.fromColoredText(text).toLegacyText();
     }
 
     /**
@@ -183,8 +153,7 @@ public class RGBUtils {
      *          string to check
      * @return  {@code true} if valid, {@code false} if not
      */
-    public boolean isHexCode(String string) {
-        Preconditions.checkNotNull(string, "string");
+    public boolean isHexCode(@NonNull String string) {
         if (string.length() != 6) return false;
         for (int i=0; i<6; i++) {
             char c = string.charAt(i);
@@ -192,18 +161,4 @@ public class RGBUtils {
         }
         return true;
     }
-
-    /**
-     * Returns true if text contains legacy color request at defined RGB index start
-     *
-     * @param   text
-     *          text to check
-     * @param   i
-     *          current index start
-     * @return  {@code true} if legacy color is defined and valid, {@code false} otherwise
-     */
-    private static boolean containsLegacyCode(String text, int i) {
-        if (text.length() - i < 9 || text.charAt(i+7) != '|') return false;
-        return EnumChatFormat.getByChar(text.charAt(i+8)) != null;
-    }
 }

api/src/main/java/me/neznamy/tab/api/chat/rgb/format/HtmlFormat.java

@@ -4,7 +4,7 @@ import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 /**
- * Formatter for #<RRGGBB>
+ * Formatter for #&lt;RRGGBB&gt;
  */
 public class HtmlFormat implements RGBFormatter {
 

api/src/main/java/me/neznamy/tab/api/chat/rgb/format/KyoriFormat.java

@@ -4,7 +4,7 @@ import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 /**
- * Formatter for <#RRGGBB>
+ * Formatter for <#RRGGBB>
  */
 public class KyoriFormat implements RGBFormatter {
 

api/src/main/java/me/neznamy/tab/api/chat/rgb/format/MiniMessageFormat.java

@@ -1,20 +1,18 @@
 package me.neznamy.tab.api.chat.rgb.format;
 
-import me.neznamy.tab.api.chat.EnumChatFormat;
 import net.kyori.adventure.text.minimessage.MiniMessage;
 import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer;
 
 /**
- * Formatter for <#RRGGBB>
+ * Call to MiniMessage API to reformat text to &x&R&R&G&G&B&B
  */
 public class MiniMessageFormat implements RGBFormatter {
 
     @Override
     public String reformat(String text) {
         if (!text.contains("<")) return text;
-        String format = text.replace(EnumChatFormat.RESET.getFormat(), ""); //remove &r from header/footer newline inserts
         try {
-            return LegacyComponentSerializer.legacySection().serialize(MiniMessage.miniMessage().deserialize(format));
+            return LegacyComponentSerializer.legacySection().serialize(MiniMessage.miniMessage().deserialize(text));
         } catch (Throwable ignored) {
             return text;
         }

api/src/main/java/me/neznamy/tab/api/chat/rgb/gradient/CommonGradient.java

@@ -3,9 +3,11 @@ package me.neznamy.tab.api.chat.rgb.gradient;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import lombok.AllArgsConstructor;
 import me.neznamy.tab.api.chat.EnumChatFormat;
 import me.neznamy.tab.api.chat.TextColor;
 
+@AllArgsConstructor
 public class CommonGradient implements GradientPattern {
 
     private final Pattern pattern;
@@ -15,18 +17,7 @@ public class CommonGradient implements GradientPattern {
     private final int startColorStart;
     private final int messageStart;
     private final int endColorStartSub;
-    
-    public CommonGradient(Pattern pattern, Pattern legacyPattern, String containCheck, int legacyCharPosition,
-            int startColorStart, int messageStart, int endColorStartSub) {
-        this.pattern = pattern;
-        this.legacyPattern = legacyPattern;
-        this.containCheck = containCheck;
-        this.legacyCharPosition = legacyCharPosition;
-        this.startColorStart = startColorStart;
-        this.messageStart = messageStart;
-        this.endColorStartSub = endColorStartSub;
-    }
-    
+
     @Override
     public String applyPattern(String text, boolean ignorePlaceholders) {
         if (!text.contains(containCheck)) return text;

api/src/main/java/me/neznamy/tab/api/chat/rgb/gradient/KyoriGradient.java

@@ -7,8 +7,8 @@ import me.neznamy.tab.api.chat.EnumChatFormat;
 import me.neznamy.tab.api.chat.TextColor;
 
 /**
- * Gradient applier for <gradient:#RRGGBB:#RRGGBB>Text</gradient>
- * and <gradient:#RRGGBB|L:#RRGGBB>Text</gradient>
+ * Gradient applier for <gradient:#RRGGBB:#RRGGBB>Text</gradient>
+ * and <gradient:#RRGGBB|L:#RRGGBB>Text</gradient>
  */
 public class KyoriGradient implements GradientPattern {
 

api/src/main/java/me/neznamy/tab/api/config/ConfigurationFile.java

@@ -1,14 +1,13 @@
 package me.neznamy.tab.api.config;
 
-import java.io.BufferedReader;
-import java.io.BufferedWriter;
+import lombok.Getter;
+import lombok.NonNull;
+import lombok.Setter;
+import me.neznamy.tab.api.TabAPI;
+
 import java.io.File;
-import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.io.OutputStreamWriter;
-import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.util.ArrayList;
 import java.util.LinkedHashMap;
@@ -16,9 +15,6 @@ import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 
-import me.neznamy.tab.api.TabAPI;
-import me.neznamy.tab.api.util.Preconditions;
-
 /**
  * Abstract class for configuration file
  */
@@ -29,10 +25,10 @@ public abstract class ConfigurationFile {
     protected List<String> header;
 
     /** Configuration file content */
-    protected Map<String, Object> values;
+    @Getter @Setter protected Map<String, Object> values;
 
     /** File to use */
-    protected final File file;
+    @Getter protected final File file;
 
     /**
      * Constructs new instance and attempts to load specified configuration file.
@@ -49,22 +45,12 @@ public abstract class ConfigurationFile {
      * @throws  IOException
      *          if I/O operation with the file unexpectedly fails
      */
-    protected ConfigurationFile(InputStream source, File destination) throws IOException {
-        Preconditions.checkNotNull(destination, "destination");
+    protected ConfigurationFile(InputStream source, @NonNull File destination) throws IOException {
         this.file = destination;
         if (file.getParentFile() != null && !file.getParentFile().exists()) Files.createDirectories(file.getParentFile().toPath());
-        if (!file.exists() && source == null) throw new IllegalStateException("File does not exist and source is null");
-        if (file.createNewFile()) {
-//            Files.copy(source, file.toPath());
-            //avoiding MalformedInputException thrown on fabric due to file not having UTF8 encoding by default
-            //also automatically using the encoding so users don't have to worry about it anymore
-            try (BufferedReader reader = new BufferedReader(new InputStreamReader(source, StandardCharsets.UTF_8));
-                BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file), StandardCharsets.UTF_8))){
-                String line;
-                while ((line = reader.readLine()) != null) {
-                    writer.write(line + "\n");
-                }
-            }
+        if (!file.exists()) {
+            if (source == null) throw new IllegalStateException("File does not exist and source is null");
+            Files.copy(source, file.toPath());
         }
         detectHeader();
     }
@@ -83,19 +69,6 @@ public abstract class ConfigurationFile {
         return file.getName();
     }
 
-    /**
-     * Returns the root value map
-     *
-     * @return  the root value map
-     */
-    public Map<String, Object> getValues(){
-        return values;
-    }
-
-    public void setValues(Map<String, Object> values) {
-        this.values = values;
-    }
-
     /**
      * Gets config option with specified path. If the option is not present and
      * {@code defaultValue} is not {@code null}, value is inserted, {@link #save()}
@@ -423,8 +396,4 @@ public abstract class ConfigurationFile {
             Files.write(file.toPath(), content);
         }
     }
-
-    public File getFile() {
-        return file;
-    }
 }

api/src/main/java/me/neznamy/tab/api/protocol/PacketBuilder.java

@@ -1,14 +1,14 @@
 package me.neznamy.tab.api.protocol;
 
-import java.util.HashMap;
-import java.util.Map;
-
+import lombok.NonNull;
 import me.neznamy.tab.api.ProtocolVersion;
 import me.neznamy.tab.api.chat.EnumChatFormat;
 import me.neznamy.tab.api.chat.IChatBaseComponent;
 import me.neznamy.tab.api.chat.rgb.RGBUtils;
 import me.neznamy.tab.api.util.BiFunctionWithException;
-import me.neznamy.tab.api.util.Preconditions;
+
+import java.util.HashMap;
+import java.util.Map;
 
 /**
  * A class for packet building, methods are overridden in
@@ -48,9 +48,7 @@ public class PacketBuilder {
      * @throws  ReflectiveOperationException
      *          if reflection fails
      */
-    public Object build(TabPacket packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
-        Preconditions.checkNotNull(packet, "packet");
-        Preconditions.checkNotNull(clientVersion, "clientVersion");
+    public Object build(@NonNull TabPacket packet, @NonNull ProtocolVersion clientVersion) throws ReflectiveOperationException {
         return buildMap.get(packet.getClass()).apply(packet, clientVersion);
     }
 
@@ -77,10 +75,8 @@ public class PacketBuilder {
      * @param   clientVersion
      *          Protocol version of player to build the packet for
      * @return  Platform-specific packet
-     * @throws  ReflectiveOperationException
-     *          if thrown by reflective operation
      */
-    public Object build(PacketPlayOutChat packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
+    public Object build(PacketPlayOutChat packet, ProtocolVersion clientVersion) {
         return packet;
     }
 
@@ -107,10 +103,8 @@ public class PacketBuilder {
      * @param   clientVersion
      *          Protocol version of player to build the packet for
      * @return  Platform-specific packet
-     * @throws  ReflectiveOperationException
-     *          if thrown by reflective operation
      */
-    public Object build(PacketPlayOutPlayerListHeaderFooter packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
+    public Object build(PacketPlayOutPlayerListHeaderFooter packet, ProtocolVersion clientVersion) {
         return packet;
     }
 
@@ -122,10 +116,8 @@ public class PacketBuilder {
      * @param   clientVersion
      *          Protocol version of player to build the packet for
      * @return  Platform-specific packet
-     * @throws  ReflectiveOperationException
-     *          if thrown by reflective operation
      */
-    public Object build(PacketPlayOutScoreboardDisplayObjective packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
+    public Object build(PacketPlayOutScoreboardDisplayObjective packet, ProtocolVersion clientVersion) {
         return packet;
     }
 
@@ -137,10 +129,8 @@ public class PacketBuilder {
      * @param   clientVersion
      *          Protocol version of player to build the packet for
      * @return  Platform-specific packet
-     * @throws  ReflectiveOperationException
-     *          if thrown by reflective operation
      */
-    public Object build(PacketPlayOutScoreboardObjective packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
+    public Object build(PacketPlayOutScoreboardObjective packet, ProtocolVersion clientVersion) {
         return packet;
     }
 
@@ -152,10 +142,8 @@ public class PacketBuilder {
      * @param   clientVersion
      *          Protocol version of player to build the packet for
      * @return  Platform-specific packet
-     * @throws  ReflectiveOperationException
-     *          if thrown by reflective operation
      */
-    public Object build(PacketPlayOutScoreboardScore packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
+    public Object build(PacketPlayOutScoreboardScore packet, ProtocolVersion clientVersion) {
         return packet;
     }
 
@@ -167,10 +155,8 @@ public class PacketBuilder {
      * @param   clientVersion
      *          Protocol version of player to build the packet for
      * @return  Platform-specific packet
-     * @throws  ReflectiveOperationException
-     *          if thrown by reflective operation
      */
-    public Object build(PacketPlayOutScoreboardTeam packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
+    public Object build(PacketPlayOutScoreboardTeam packet, ProtocolVersion clientVersion) {
         return packet;
     }
 
@@ -202,7 +188,7 @@ public class PacketBuilder {
     }
 
     /**
-     * If {@code clientVersion} is >= 1.13, creates a component from given text and returns
+     * If {@code clientVersion} is >= 1.13, creates a component from given text and returns
      * it as a serialized component, which BungeeCord uses.
      * <p>
      * If {@code clientVersion} is &lt; 1.12, the text is cut to {@code length} characters if

api/src/main/java/me/neznamy/tab/api/protocol/PacketPlayOutBoss.java

@@ -1,21 +1,23 @@
 package me.neznamy.tab.api.protocol;
 
-import java.util.UUID;
-
+import lombok.Data;
+import lombok.NonNull;
 import me.neznamy.tab.api.bossbar.BarColor;
 import me.neznamy.tab.api.bossbar.BarStyle;
-import me.neznamy.tab.api.util.Preconditions;
+
+import java.util.UUID;
 
 /**
  * A class representing platform specific packet class
  */
+@Data
 public class PacketPlayOutBoss implements TabPacket {
 
     /** UUID of the BossBar */
     private final UUID id;
 
     /** Action of this packet */
-    private final Action action;
+    private Action action;
 
     /** BossBar title */
     private String name;
@@ -53,11 +55,7 @@ public class PacketPlayOutBoss implements TabPacket {
      * @param   overlay
      *          BossBar style
      */
-    public PacketPlayOutBoss(UUID id, String name, float pct, BarColor color, BarStyle overlay) {
-        Preconditions.checkNotNull(id, "uuid");
-        Preconditions.checkNotNull(name, "title");
-        Preconditions.checkNotNull(color, "color");
-        Preconditions.checkNotNull(overlay, "style");
+    public PacketPlayOutBoss(@NonNull UUID id, @NonNull String name, float pct, @NonNull BarColor color, @NonNull BarStyle overlay) {
         this.action = Action.ADD;
         this.id = id;
         this.name = name;
@@ -68,28 +66,26 @@ public class PacketPlayOutBoss implements TabPacket {
 
     /**
      * Constructs new instance with given parameters and
-     * {@link me.neznamy.tab.api.protocol.PacketPlayOutBoss.Action}.REMOVE action
+     * {@link me.neznamy.tab.api.protocol.PacketPlayOutBoss.Action#REMOVE} action
      *
      * @param   id
      *          BossBar uuid
      */
-    public PacketPlayOutBoss(UUID id) {
-        Preconditions.checkNotNull(id, "uuid");
+    public PacketPlayOutBoss(@NonNull UUID id) {
         this.action = Action.REMOVE;
         this.id = id;
     }
 
     /**
      * Constructs new instance with given parameters and
-     * {@link me.neznamy.tab.api.protocol.PacketPlayOutBoss.Action}.UPDATE_PCT action
+     * {@link me.neznamy.tab.api.protocol.PacketPlayOutBoss.Action#UPDATE_PCT} action
      *
      * @param   id
      *          BossBar uuid
      * @param   pct
      *          BossBar progress
      */
-    public PacketPlayOutBoss(UUID id, float pct) {
-        Preconditions.checkNotNull(id, "uuid");
+    public PacketPlayOutBoss(@NonNull UUID id, float pct) {
         this.action = Action.UPDATE_PCT;
         this.id = id;
         this.pct = pct;
@@ -97,16 +93,14 @@ public class PacketPlayOutBoss implements TabPacket {
 
     /**
      * Constructs new instance with given parameters and
-     * {@link me.neznamy.tab.api.protocol.PacketPlayOutBoss.Action}.UPDATE_NAME action
+     * {@link me.neznamy.tab.api.protocol.PacketPlayOutBoss.Action#UPDATE_NAME} action
      *
      * @param   id
      *          BossBar uuid
      * @param   name
      *          BossBar title
      */
-    public PacketPlayOutBoss(UUID id, String name) {
-        Preconditions.checkNotNull(id, "uuid");
-        Preconditions.checkNotNull(name, "title");
+    public PacketPlayOutBoss(@NonNull UUID id, @NonNull String name) {
         this.action = Action.UPDATE_NAME;
         this.id = id;
         this.name = name;
@@ -114,7 +108,7 @@ public class PacketPlayOutBoss implements TabPacket {
 
     /**
      * Constructs new instance with given parameters and
-     * {@link me.neznamy.tab.api.protocol.PacketPlayOutBoss.Action}.UPDATE_STYLE action
+     * {@link me.neznamy.tab.api.protocol.PacketPlayOutBoss.Action#UPDATE_STYLE} action
      *
      * @param   id
      *          BossBar uuid
@@ -123,10 +117,7 @@ public class PacketPlayOutBoss implements TabPacket {
      * @param   overlay
      *          BossBar style
      */
-    public PacketPlayOutBoss(UUID id, BarColor color, BarStyle overlay) {
-        Preconditions.checkNotNull(id, "uuid");
-        Preconditions.checkNotNull(color, "color");
-        Preconditions.checkNotNull(overlay, "style");
+    public PacketPlayOutBoss(@NonNull UUID id, @NonNull BarColor color, @NonNull BarStyle overlay) {
         this.action = Action.UPDATE_STYLE;
         this.id = id;
         this.color = color;
@@ -135,7 +126,7 @@ public class PacketPlayOutBoss implements TabPacket {
 
     /**
      * Constructs new instance with given parameters and
-     * {@link me.neznamy.tab.api.protocol.PacketPlayOutBoss.Action}.UPDATE_PROPERTIES action
+     * {@link me.neznamy.tab.api.protocol.PacketPlayOutBoss.Action#UPDATE_PROPERTIES} action
      *
      * @param   darkenScreen
      *          Darken screen flag
@@ -144,8 +135,7 @@ public class PacketPlayOutBoss implements TabPacket {
      * @param   createWorldFog
      *          Create fog flag
      */
-    public PacketPlayOutBoss(UUID id, boolean darkenScreen, boolean playMusic, boolean createWorldFog) {
-        Preconditions.checkNotNull(id, "uuid");
+    public PacketPlayOutBoss(@NonNull UUID id, boolean darkenScreen, boolean playMusic, boolean createWorldFog) {
         this.action = Action.UPDATE_PROPERTIES;
         this.id = id;
         this.darkenScreen = darkenScreen;
@@ -161,7 +151,7 @@ public class PacketPlayOutBoss implements TabPacket {
      *
      * @return  the bitmask
      */
-    public byte getFlags(){
+    public byte getFlags() {
         byte value = 0;
         if (darkenScreen) value += 1;
         if (playMusic) value += 2;
@@ -169,123 +159,6 @@ public class PacketPlayOutBoss implements TabPacket {
         return value;
     }
 
-    @Override
-    public String toString() {
-        return String.format("PacketPlayOutBoss{id=%s,operation=%s,name=%s,pct=%s,color=%s,overlay=%s,darkenScreen=%s,playMusic=%s,createWorldFog=%s}",
-                id, action, name, pct, color, overlay, darkenScreen, playMusic, createWorldFog);
-    }
-
-    /**
-     * Returns {@link #color}
-     *
-     * @return  color
-     */
-    public BarColor getColor() {
-        return color;
-    }
-
-    /**
-     * Returns {@link #overlay}
-     *
-     * @return  style
-     */
-    public BarStyle getOverlay() {
-        return overlay;
-    }
-
-    /**
-     * Returns {@link #name}
-     *
-     * @return  name
-     */
-    public String getName() {
-        return name;
-    }
-
-    /**
-     * Returns {@link #id}
-     *
-     * @return  id
-     */
-    public UUID getId() {
-        return id;
-    }
-
-    /**
-     * Returns {@link #pct}
-     *
-     * @return  progress
-     */
-    public float getPct() {
-        return pct;
-    }
-
-    /**
-     * Returns {@link #action}
-     *
-     * @return  packet action
-     */
-    public Action getAction() {
-        return action;
-    }
-
-    /**
-     * Returns {@link #darkenScreen}
-     *
-     * @return  darkenScreen
-     */
-    public boolean isDarkenScreen() {
-        return darkenScreen;
-    }
-
-    /**
-     * Returns {@link #createWorldFog}
-     *
-     * @return  createWorldFog
-     */
-    public boolean isCreateWorldFog() {
-        return createWorldFog;
-    }
-
-    /**
-     * Returns {@link #playMusic}
-     *
-     * @return  playMusic
-     */
-    public boolean isPlayMusic() {
-        return playMusic;
-    }
-
-    /**
-     * Sets {@link #darkenScreen} to specified value
-     *
-     * @param   darkenScreen
-     *          Darken screen flag
-     */
-    public void setDarkenScreen(boolean darkenScreen) {
-        this.darkenScreen = darkenScreen;
-    }
-
-    /**
-     * Sets {@link #createWorldFog} to specified value
-     *
-     * @param   createWorldFog
-     *          Create fog flag
-     */
-    public void setCreateWorldFog(boolean createWorldFog) {
-        this.createWorldFog = createWorldFog;
-    }
-
-    /**
-     * Sets {@link #playMusic} to specified value
-     *
-     * @param   playMusic
-     *          Play music flag
-     */
-    public void setPlayMusic(boolean playMusic) {
-        this.playMusic = playMusic;
-    }
-
     /**
      * An enum representing all valid boss packet actions.
      * Calling ordinal() will return action's network ID.

api/src/main/java/me/neznamy/tab/api/protocol/PacketPlayOutChat.java

@@ -1,56 +1,20 @@
 package me.neznamy.tab.api.protocol;
 
+import lombok.Data;
+import lombok.NonNull;
 import me.neznamy.tab.api.chat.IChatBaseComponent;
-import me.neznamy.tab.api.util.Preconditions;
 
 /**
  * A class representing platform specific packet class
  */
+@Data
 public class PacketPlayOutChat implements TabPacket {
 
     /** Message to be sent */
-    private final IChatBaseComponent message;
+    @NonNull private final IChatBaseComponent message;
 
     /** Message position */
-    private final ChatMessageType type;
-
-    /**
-     * Constructs new instance with given parameters
-     * 
-     * @param   message
-     *          Chat message to be sent
-     * @param   type
-     *          Message position
-     */
-    public PacketPlayOutChat(IChatBaseComponent message, ChatMessageType type) {
-        Preconditions.checkNotNull(message, "message");
-        Preconditions.checkNotNull(type, "message type");
-        this.message = message;
-        this.type = type;
-    }
-
-    @Override
-    public String toString() {
-        return String.format("PacketPlayOutChat{message=%s,type=%s}", message, type);
-    }
-
-    /**
-     * Returns {@link #message}
-     *
-     * @return  message
-     */
-    public IChatBaseComponent getMessage() {
-        return message;
-    }
-
-    /**
-     * Returns {@link #type}
-     *
-     * @return  type
-     */
-    public ChatMessageType getType() {
-        return type;
-    }
+    @NonNull private final ChatMessageType type;
 
     /**
      * An enum representing positions of a chat message

api/src/main/java/me/neznamy/tab/api/protocol/PacketPlayOutPlayerInfo.java

@@ -1,19 +1,34 @@
 package me.neznamy.tab.api.protocol;
 
-import java.util.Arrays;
-import java.util.List;
-import java.util.UUID;
-
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NonNull;
 import me.neznamy.tab.api.chat.IChatBaseComponent;
-import me.neznamy.tab.api.util.Preconditions;
+
+import java.util.*;
 
 /**
  * A class representing platform specific packet class
  */
+@Data @AllArgsConstructor
 public class PacketPlayOutPlayerInfo implements TabPacket {
 
-    /** Packet action */
-    private final EnumPlayerInfoAction action;
+    /** Map for faster EnumSet creation */
+    private static final EnumMap<EnumPlayerInfoAction, EnumSet<EnumPlayerInfoAction>> actionToEnumSetMap =
+            new EnumMap<EnumPlayerInfoAction, EnumSet<EnumPlayerInfoAction>>(EnumPlayerInfoAction.class) {{
+                for (EnumPlayerInfoAction action : EnumPlayerInfoAction.values()) {
+                    if (action == EnumPlayerInfoAction.ADD_PLAYER) {
+                        EnumSet<EnumPlayerInfoAction> set = EnumSet.allOf(EnumPlayerInfoAction.class);
+                        set.remove(EnumPlayerInfoAction.REMOVE_PLAYER);
+                        put(action, set);
+                    } else {
+                        put(action, EnumSet.of(action));
+                    }
+                }
+            }};
+
+    /** Packet actions */
+    private final EnumSet<EnumPlayerInfoAction> actions;
 
     /** List of affected entries */
     private final List<PlayerInfoData> entries;
@@ -27,10 +42,7 @@ public class PacketPlayOutPlayerInfo implements TabPacket {
      *          Affected entries
      */
     public PacketPlayOutPlayerInfo(EnumPlayerInfoAction action, PlayerInfoData... entries) {
-        Preconditions.checkNotNull(action, "action");
-        Preconditions.checkNotNull(entries, "entries");
-        this.action = action;
-        this.entries = Arrays.asList(entries);
+        this(action, Arrays.asList(entries));
     }
 
     /**
@@ -41,41 +53,42 @@ public class PacketPlayOutPlayerInfo implements TabPacket {
      * @param   entries
      *          Affected entries
      */
-    public PacketPlayOutPlayerInfo(EnumPlayerInfoAction action, List<PlayerInfoData> entries) {
-        Preconditions.checkNotNull(action, "action");
-        Preconditions.checkNotNull(entries, "entries");
-        this.action = action;
+    public PacketPlayOutPlayerInfo(@NonNull EnumPlayerInfoAction action, @NonNull List<PlayerInfoData> entries) {
+        this.actions = actionToEnumSetMap.get(action);
         this.entries = entries;
     }
 
-    @Override
-    public String toString() {
-        return String.format("PacketPlayOutPlayerInfo{action=%s,entries=%s}", action, entries);
-    }
-
     /**
-     * Returns {@link #action}
+     * Constructs new instance with given parameters.
      *
-     * @return  packet action
+     * @param   actions
+     *          Packet actions
+     * @param   entries
+     *          Affected entries
      */
-    public EnumPlayerInfoAction getAction() {
-        return action;
-    }
-
-    /**
-     * Returns {@link #entries}
-     *
-     * @return  affected entries
-     */
-    public List<PlayerInfoData> getEntries() {
-        return entries;
+    public PacketPlayOutPlayerInfo(@NonNull EnumSet<EnumPlayerInfoAction> actions, @NonNull PlayerInfoData... entries) {
+        this.actions = actions;
+        this.entries = Arrays.asList(entries);
     }
 
     /**
      * A subclass representing player list entry
      */
+    @Data @AllArgsConstructor
     public static class PlayerInfoData {
 
+        /** Real name of affected player */
+        private String name;
+
+        /** Player UUID */
+        @NonNull private UUID uniqueId;
+
+        /** Player's skin, null for empty skin */
+        private Skin skin;
+
+        /** I have no idea what this is */
+        private boolean listed;
+
         /** Latency */
         private int latency;
 
@@ -88,252 +101,75 @@ public class PacketPlayOutPlayerInfo implements TabPacket {
          */
         private IChatBaseComponent displayName;
 
-        /** Real name of affected player */
-        private String name;
-
-        /** Player UUID */
-        private UUID uniqueId;
-
-        /** Player's skin, null for empty skin */
-        private Skin skin;
+        /** Chat session ID */
+        private UUID chatSessionId;
 
         /** Player's chat signing key */
         private Object profilePublicKey;
 
         /**
          * Constructs new instance with given parameters. Suitable for 
-         * {@link EnumPlayerInfoAction}.ADD_PLAYER action
-         * 
-         * @param   name
-         *          Player's name
-         * @param   uniqueId
-         *          Player's uuid
-         * @param   skin
-         *          Player's platform-specific skin object
-         * @param   latency
-         *          Player's ping
-         * @param   gameMode
-         *          Player's GameMode
-         * @param   displayName
-         *          Player's display name
-         * @param   profilePublicKey
-         *          Player's chat signing key
-         */
-        public PlayerInfoData(String name, UUID uniqueId, Skin skin, int latency, EnumGamemode gameMode, IChatBaseComponent displayName, Object profilePublicKey) {
-            Preconditions.checkNotNull(uniqueId, "uuid");
-            this.name = name;
-            this.uniqueId = uniqueId;
-            this.skin = skin;
-            this.latency = latency;
-            this.gameMode = gameMode;
-            this.displayName = displayName;
-            this.profilePublicKey = profilePublicKey;
-        }
-
-        /**
-         * Constructs new instance with given parameters. Suitable for 
-         * {@link EnumPlayerInfoAction}.UPDATE_GAME_MODE action
+         * {@link EnumPlayerInfoAction#UPDATE_GAME_MODE} action
          * 
          * @param   uniqueId
          *          Player's uuid
          * @param   gameMode
          *          Player's GameMode
          */
-        public PlayerInfoData(UUID uniqueId, EnumGamemode gameMode) {
-            Preconditions.checkNotNull(uniqueId, "uuid");
+        public PlayerInfoData(@NonNull UUID uniqueId, EnumGamemode gameMode) {
             this.uniqueId = uniqueId;
             this.gameMode = gameMode;
         }
 
         /**
          * Constructs new instance with given parameters. Suitable for 
-         * {@link EnumPlayerInfoAction}.UPDATE_LATENCY action
+         * {@link EnumPlayerInfoAction#UPDATE_LATENCY} action
          * 
          * @param   uniqueId
          *          Player's uuid
          * @param   latency
          *          Player's ping
          */
-        public PlayerInfoData(UUID uniqueId, int latency) {
-            Preconditions.checkNotNull(uniqueId, "uuid");
+        public PlayerInfoData(@NonNull UUID uniqueId, int latency) {
             this.uniqueId = uniqueId;
             this.latency = latency;
         }
 
         /**
          * Constructs new instance with given parameters. Suitable for 
-         * {@link EnumPlayerInfoAction}.UPDATE_DISPLAY_NAME action
+         * {@link EnumPlayerInfoAction#UPDATE_DISPLAY_NAME} action
          * 
          * @param   uniqueId
          *          Player's uuid
          * @param   displayName
          *          Player's display name
          */
-        public PlayerInfoData(UUID uniqueId, IChatBaseComponent displayName) {
-            Preconditions.checkNotNull(uniqueId, "uuid");
+        public PlayerInfoData(@NonNull UUID uniqueId, IChatBaseComponent displayName) {
             this.uniqueId = uniqueId;
             this.displayName = displayName;
         }
 
         /**
          * Constructs new instance with given parameter. Suitable for 
-         * {@link EnumPlayerInfoAction}.REMOVE_PLAYER action
+         * {@link EnumPlayerInfoAction#REMOVE_PLAYER} action
          * 
          * @param   uniqueId
          *          Player's uuid
          */
-        public PlayerInfoData(UUID uniqueId) {
+        public PlayerInfoData(@NonNull UUID uniqueId) {
             this.uniqueId = uniqueId;
         }
-
-        @Override
-        public String toString() {
-            return String.format("PlayerInfoData{latency=%s,gameMode=%s,displayName=%s,name=%s,uniqueId=%s,skin=%s,profilePublicKey=%s}",
-                    latency, gameMode, displayName, name, uniqueId, skin, profilePublicKey);
-        }
-
-        /**
-         * Returns {@link #latency}
-         *
-         * @return  latency
-         */
-        public int getLatency() {
-            return latency;
-        }
-
-        /**
-         * Sets {@link #latency} to specified value
-         *
-         * @param   latency
-         *          Latency to use
-         */
-        public void setLatency(int latency) {
-            this.latency = latency;
-        }
-
-        /**
-         * Returns {@link #displayName}
-         *
-         * @return  displayName
-         */
-        public IChatBaseComponent getDisplayName() {
-            return displayName;
-        }
-
-        /**
-         * Sets {@link #displayName} to specified value
-         *
-         * @param   displayName
-         *          Display name to use
-         */
-        public void setDisplayName(IChatBaseComponent displayName) {
-            this.displayName = displayName;
-        }
-
-        /**
-         * Returns {@link #uniqueId}
-         *
-         * @return  uniqueId
-         */
-        public UUID getUniqueId() {
-            return uniqueId;
-        }
-
-        /**
-         * Sets {@link #uniqueId} to specified value
-         *
-         * @param   uniqueId
-         *          UUID to use
-         */
-        public void setUniqueId(UUID uniqueId) {
-            this.uniqueId = uniqueId;
-        }
-
-        /**
-         * Returns {@link #name}
-         *
-         * @return  name
-         */
-        public String getName() {
-            return name;
-        }
-
-        /**
-         * Sets {@link #name} to specified value
-         *
-         * @param   name
-         *          name to use
-         */
-        public void setName(String name) {
-            this.name = name;
-        }
-
-        /**
-         * Returns {@link #gameMode}
-         *
-         * @return  gameMode
-         */
-        public EnumGamemode getGameMode() {
-            return gameMode;
-        }
-
-        /**
-         * Sets {@link #gameMode} to specified value
-         *
-         * @param   gameMode
-         *          GameMode to use
-         */
-        public void setGameMode(EnumGamemode gameMode) {
-            this.gameMode = gameMode;
-        }
-
-        /**
-         * Returns {@link #skin}
-         *
-         * @return  skin
-         */
-        public Skin getSkin() {
-            return skin;
-        }
-
-        /**
-         * Sets {@link #skin} to specified value
-         *
-         * @param   skin
-         *          Skin to use
-         */
-        public void setSkin(Skin skin) {
-            this.skin = skin;
-        }
-
-        /**
-         * Returns {@link #profilePublicKey}
-         *
-         * @return  profilePublicKey
-         */
-        public Object getProfilePublicKey() {
-            return profilePublicKey;
-        }
-
-        /**
-         * Sets {@link #profilePublicKey} to specified value
-         *
-         * @param   profilePublicKey
-         *          profilePublicKey to use
-         */
-        public void setProfilePublicKey(Object profilePublicKey) {
-            this.profilePublicKey = profilePublicKey;
-        }
     }
 
     /**
      * En enum representing packet action
-     * Calling ordinal() will return action's network ID.
      */
     public enum EnumPlayerInfoAction {
 
         ADD_PLAYER,
+        INITIALIZE_CHAT,
         UPDATE_GAME_MODE,
+        UPDATE_LISTED,
         UPDATE_LATENCY,
         UPDATE_DISPLAY_NAME,
         REMOVE_PLAYER

api/src/main/java/me/neznamy/tab/api/protocol/PacketPlayOutPlayerListHeaderFooter.java

@@ -1,18 +1,21 @@
 package me.neznamy.tab.api.protocol;
 
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NonNull;
 import me.neznamy.tab.api.chat.IChatBaseComponent;
-import me.neznamy.tab.api.util.Preconditions;
 
 /**
  * A class representing platform specific packet class
  */
+@Data @AllArgsConstructor
 public class PacketPlayOutPlayerListHeaderFooter implements TabPacket {
 
     /** TabList header */
-    private final IChatBaseComponent header;
+    @NonNull private final IChatBaseComponent header;
 
     /** TabList footer */
-    private final IChatBaseComponent footer;
+    @NonNull private final IChatBaseComponent footer;
 
     /**
      * Constructs new instance with given parameters. They are converted to {@link IChatBaseComponent}
@@ -23,48 +26,8 @@ public class PacketPlayOutPlayerListHeaderFooter implements TabPacket {
      * @param   footer
      *          TabList footer
      */
-    public PacketPlayOutPlayerListHeaderFooter(String header, String footer) {
-        Preconditions.checkNotNull(header, "header");
-        Preconditions.checkNotNull(footer, "footer");
+    public PacketPlayOutPlayerListHeaderFooter(@NonNull String header, @NonNull String footer) {
         this.header = IChatBaseComponent.optimizedComponent(header);
         this.footer = IChatBaseComponent.optimizedComponent(footer);
     }
-
-    /**
-     * Constructs new instance with given parameters.
-     * 
-     * @param   header
-     *          TabList header
-     * @param   footer
-     *          TabList footer
-     */
-    public PacketPlayOutPlayerListHeaderFooter(IChatBaseComponent header, IChatBaseComponent footer) {
-        Preconditions.checkNotNull(header, "header");
-        Preconditions.checkNotNull(footer, "footer");
-        this.header = header;
-        this.footer = footer;
-    }
-
-    @Override
-    public String toString() {
-        return String.format("PacketPlayOutPlayerListHeaderFooter{header=%s,footer=%s}", header, footer);
-    }
-
-    /**
-     * Returns {@link #header}
-     *
-     * @return  header
-     */
-    public IChatBaseComponent getHeader() {
-        return header;
-    }
-
-    /**
-     * Returns {@link #footer}
-     *
-     * @return  footer
-     */
-    public IChatBaseComponent getFooter() {
-        return footer;
-    }
 }

api/src/main/java/me/neznamy/tab/api/protocol/PacketPlayOutScoreboardDisplayObjective.java

@@ -1,10 +1,12 @@
 package me.neznamy.tab.api.protocol;
 
-import me.neznamy.tab.api.util.Preconditions;
+import lombok.Data;
+import lombok.NonNull;
 
 /**
  * A class representing platform specific packet class
  */
+@Data
 public class PacketPlayOutScoreboardDisplayObjective implements TabPacket {
 
     /**
@@ -16,45 +18,5 @@ public class PacketPlayOutScoreboardDisplayObjective implements TabPacket {
     private final int slot;
 
     /** Up to 16 characters long objective name */
-    private final String objectiveName;
-
-    /**
-     * Constructs new instance with given parameters
-     *
-     * @param   slot
-     *          Display slot
-     * @param   objectiveName
-     *          Internal name of the objective
-     * @throws  IllegalArgumentException
-     *          if {@code objectiveName} is null or longer than 16 characters
-     */
-    public PacketPlayOutScoreboardDisplayObjective(int slot, String objectiveName) {
-        Preconditions.checkNotNull(objectiveName, "objective name");
-        Preconditions.checkMaxLength(objectiveName, 16, "objective name");
-        this.slot = slot;
-        this.objectiveName = objectiveName;
-    }
-
-    @Override
-    public String toString() {
-        return String.format("PacketPlayOutScoreboardDisplayObjective{slot=%s,objectiveName=%s}", slot, objectiveName);
-    }
-
-    /**
-     * Returns {@link #slot}
-     *
-     * @return  slot
-     */
-    public int getSlot() {
-        return slot;
-    }
-
-    /**
-     * Returns {@link #objectiveName}
-     *
-     * @return  objectiveName
-     */
-    public String getObjectiveName() {
-        return objectiveName;
-    }
+    @NonNull private final String objectiveName;
 }

api/src/main/java/me/neznamy/tab/api/protocol/PacketPlayOutScoreboardObjective.java

@@ -1,21 +1,16 @@
 package me.neznamy.tab.api.protocol;
 
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NonNull;
 import me.neznamy.tab.api.util.Preconditions;
 
 /**
  * A class representing platform specific packet class
  */
+@Data @AllArgsConstructor
 public class PacketPlayOutScoreboardObjective implements TabPacket {
 
-    /** Up to 16 characters long objective name */
-    private final String objectiveName;
-
-    /** Display name */
-    private final String displayName;
-
-    /** Display type, only takes effect in PlayerList */
-    private final EnumScoreboardHealthDisplay renderType;
-
     /**
      * Packet action.
      * 0 = register,
@@ -24,30 +19,14 @@ public class PacketPlayOutScoreboardObjective implements TabPacket {
      */
     private final int action;
 
-    /**
-     * Constructs new instance with given parameters.
-     *
-     * @param   action
-     *          Packet action (0 = add, 1 = remove, 2 = update title)
-     * @param   objectiveName
-     *          objective name, up to 16 characters long
-     * @param   displayName
-     *          title
-     * @param   renderType
-     *          display type
-     * @throws  IllegalArgumentException
-     *          if {@code objectiveName} is null or longer than 16 characters
-     */
-    public PacketPlayOutScoreboardObjective(int action, String objectiveName, String displayName, EnumScoreboardHealthDisplay renderType) {
-        Preconditions.checkRange(action, 0, 2, "action");
-        Preconditions.checkNotNull(objectiveName, "objective name");
-        Preconditions.checkMaxLength(objectiveName, 16, "objective name");
-        Preconditions.checkNotNull(renderType, "render type");
-        this.objectiveName = objectiveName;
-        this.displayName = displayName;
-        this.renderType = renderType;
-        this.action = action;
-    }
+    /** Up to 16 characters long objective name */
+    @NonNull private final String objectiveName;
+
+    /** Display name */
+    private final String displayName;
+
+    /** Display type, only takes effect in PlayerList */
+    private final EnumScoreboardHealthDisplay renderType;
 
     /**
      * Constructs new packet with given objective name and 1 (unregister) action.
@@ -57,8 +36,7 @@ public class PacketPlayOutScoreboardObjective implements TabPacket {
      * @throws  IllegalArgumentException
      *          if {@code objectiveName} is null or longer than 16 characters
      */
-    public PacketPlayOutScoreboardObjective(String objectiveName) {
-        Preconditions.checkNotNull(objectiveName, "objective name");
+    public PacketPlayOutScoreboardObjective(@NonNull String objectiveName) {
         Preconditions.checkMaxLength(objectiveName, 16, "objective name");
         this.objectiveName = objectiveName;
         this.displayName = ""; //avoiding NPE on <1.7
@@ -66,48 +44,6 @@ public class PacketPlayOutScoreboardObjective implements TabPacket {
         this.renderType = null;
     }
 
-    @Override
-    public String toString() {
-        return String.format("PacketPlayOutScoreboardObjective{objectiveName=%s,displayName=%s,renderType=%s,method=%s}",
-                objectiveName, displayName, renderType, action);
-    }
-
-    /**
-     * Returns {@link #displayName}
-     *
-     * @return  displayName
-     */
-    public String getDisplayName() {
-        return displayName;
-    }
-
-    /**
-     * Returns {@link #objectiveName}
-     *
-     * @return  objectiveName
-     */
-    public String getObjectiveName() {
-        return objectiveName;
-    }
-
-    /**
-     * Returns {@link #renderType}
-     *
-     * @return  renderType
-     */
-    public EnumScoreboardHealthDisplay getRenderType() {
-        return renderType;
-    }
-
-    /**
-     * Returns {@link #action}
-     *
-     * @return  packet action
-     */
-    public int getAction() {
-        return action;
-    }
-
     /**
      * An enum representing available display types.
      * They only take effect in PlayerList position.

api/src/main/java/me/neznamy/tab/api/protocol/PacketPlayOutScoreboardScore.java

@@ -1,91 +1,26 @@
 package me.neznamy.tab.api.protocol;
 
-import me.neznamy.tab.api.util.Preconditions;
+import lombok.Data;
+import lombok.NonNull;
 
 /**
  * A class representing platform specific packet class
  */
+@Data
 public class PacketPlayOutScoreboardScore implements TabPacket {
 
     /** Packet action */
-    private final Action action;
+    @NonNull private final Action action;
 
     /** Objective name */
-    private final String objectiveName;
+    @NonNull private final String objectiveName;
 
     /** Affected player */
-    private final String player;
+    @NonNull private final String player;
 
     /** Player's score */
     private final int score;
 
-    /**
-     * Constructs new instance with given parameters
-     *
-     * @param   action
-     *          Packet action
-     * @param   objectiveName
-     *          Objective name
-     * @param   player
-     *          Affected player
-     * @param   score
-     *          Player's score
-     * @throws  IllegalArgumentException
-     *          if {@code objectiveName} is null or longer than 16 characters
-     */
-    public PacketPlayOutScoreboardScore(Action action, String objectiveName, String player, int score) {
-        Preconditions.checkNotNull(action, "action");
-        Preconditions.checkNotNull(objectiveName, "objective name");
-        Preconditions.checkMaxLength(objectiveName, 16, "objective name");
-        Preconditions.checkNotNull(player, "player");
-        this.action = action;
-        this.objectiveName = objectiveName;
-        this.player = player;
-        this.score = score;
-    }
-
-    @Override
-    public String toString() {
-        return String.format("PacketPlayOutScoreboardScore{action=%s,objectiveName=%s,player=%s,score=%s}",
-                action, objectiveName, player, score);
-    }
-
-    /**
-     * Returns {@link #action}
-     *
-     * @return  packet action
-     */
-    public Action getAction() {
-        return action;
-    }
-
-    /**
-     * Returns {@link #objectiveName}
-     *
-     * @return  objective name
-     */
-    public String getObjectiveName() {
-        return objectiveName;
-    }
-
-    /**
-     * Returns {@link #player}
-     *
-     * @return  player
-     */
-    public String getPlayer() {
-        return player;
-    }
-
-    /**
-     * Returns {@link #score}
-     *
-     * @return  score
-     */
-    public int getScore() {
-        return score;
-    }
-
     /**
      * An enum representing action types
      */

api/src/main/java/me/neznamy/tab/api/protocol/PacketPlayOutScoreboardTeam.java

@@ -1,14 +1,17 @@
 package me.neznamy.tab.api.protocol;
 
+import lombok.Data;
+import lombok.NonNull;
+import me.neznamy.tab.api.chat.EnumChatFormat;
+import me.neznamy.tab.api.util.Preconditions;
+
 import java.util.Collection;
 import java.util.Collections;
 
-import me.neznamy.tab.api.chat.EnumChatFormat;
-import me.neznamy.tab.api.util.Preconditions;
-
 /**
  * A class representing platform specific packet class
  */
+@Data
 public class PacketPlayOutScoreboardTeam implements TabPacket {
 
     /**
@@ -18,12 +21,12 @@ public class PacketPlayOutScoreboardTeam implements TabPacket {
      * Players with teams are below them, players of the same team are
      * sorted alphabetically by usernames.
      */
-    private final String name;
+    @NonNull private final String name;
 
-    /** Team prefix, limited to 16 characters, on <1.13 */
+    /** Team prefix, limited to 16 characters, on &lt;1.13 */
     private String playerPrefix;
 
-    /** Team suffix, limited to 16 characters, on <1.13 */
+    /** Team suffix, limited to 16 characters, on &lt;1.13 */
     private String playerSuffix;
 
     /** 
@@ -46,10 +49,10 @@ public class PacketPlayOutScoreboardTeam implements TabPacket {
 
     /** 
      * Affected entities. For players, it is their name, for other entities their UUID
-     * Player name length is limited to 16 characters for <1.8, 40 characters since 1.8.
+     * Player name length is limited to 16 characters for &lt;1.8, 40 characters since 1.8.
      * Entity UUID option was added in 1.8.
      */
-    private Collection<String> players = Collections.emptyList();
+    @NonNull private Collection<String> players = Collections.emptyList();
 
     /**
      * Packet action.
@@ -80,8 +83,7 @@ public class PacketPlayOutScoreboardTeam implements TabPacket {
      * @throws  IllegalArgumentException
      *          if {@code name} is null, empty or longer than 16 characters
      */
-    private PacketPlayOutScoreboardTeam(int action, String name) {
-        Preconditions.checkNotNull(name, "team name");
+    private PacketPlayOutScoreboardTeam(int action, @NonNull String name) {
         Preconditions.checkMaxLength(name, 16, "team name");
         this.action = action;
         this.name = name;
@@ -107,13 +109,9 @@ public class PacketPlayOutScoreboardTeam implements TabPacket {
      * @throws  IllegalArgumentException
      *          if {@code name} is null, empty or longer than 16 characters
      */
-    public PacketPlayOutScoreboardTeam(String team, String prefix, String suffix, String visibility, String collision, Collection<String> players, int options) {
+    public PacketPlayOutScoreboardTeam(String team, @NonNull String prefix, @NonNull String suffix, String visibility,
+                                       String collision, @NonNull Collection<String> players, int options) {
         this(0, team);
-        Preconditions.checkNotNull(prefix, "prefix");
-        Preconditions.checkNotNull(suffix, "suffix");
-        Preconditions.checkNotNull(visibility, "visibility");
-        Preconditions.checkNotNull(collision, "collision");
-        Preconditions.checkNotNull(players, "players");
         this.playerPrefix = prefix;
         this.playerSuffix = suffix;
         this.nameTagVisibility = visibility;
@@ -152,13 +150,9 @@ public class PacketPlayOutScoreboardTeam implements TabPacket {
      * @throws  IllegalArgumentException
      *          if {@code name} is null, empty or longer than 16 characters
      */
-    public PacketPlayOutScoreboardTeam(String team, String prefix, String suffix, String visibility, String collision, int options) {
+    public PacketPlayOutScoreboardTeam(String team, @NonNull String prefix, @NonNull String suffix,
+                                       String visibility, String collision, int options) {
         this(2, team);
-        Preconditions.checkNotNull(prefix, "prefix");
-        Preconditions.checkNotNull(suffix, "suffix");
-        Preconditions.checkNotNull(visibility, "visibility");
-        Preconditions.checkNotNull(collision, "collision");
-        Preconditions.checkNotNull(players, "players");
         this.playerPrefix = prefix;
         this.playerSuffix = suffix;
         this.nameTagVisibility = visibility;
@@ -179,107 +173,8 @@ public class PacketPlayOutScoreboardTeam implements TabPacket {
      * @throws  IllegalArgumentException
      *          if {@code name} is null, empty or longer than 16 characters
      */
-    public PacketPlayOutScoreboardTeam(String team, Collection<String> players, boolean add) {
+    public PacketPlayOutScoreboardTeam(String team, @NonNull Collection<String> players, boolean add) {
         this(add ? 3 : 4, team);
-        Preconditions.checkNotNull(players, "players");
         this.players = players;
     }
-
-    @Override
-    public String toString() {
-        return String.format("PacketPlayOutScoreboardTeam{name=%s,playerPrefix=%s,playerSuffix=%s,nameTagVisibility=%s,"
-                + "collisionRule=%s,color=%s,players=%s,method=%s,options=%s}",
-                name, playerPrefix, playerSuffix, nameTagVisibility, collisionRule, color, players, action, options);
-    }
-
-    /**
-     * Returns {@link #name}
-     *
-     * @return  team name
-     */
-    public String getName() {
-        return name;
-    }
-
-    /**
-     * Returns {@link #playerPrefix}
-     *
-     * @return  playerPrefix
-     */
-    public String getPlayerPrefix() {
-        return playerPrefix;
-    }
-
-    /**
-     * Returns {@link #playerSuffix}
-     *
-     * @return  playerSuffix
-     */
-    public String getPlayerSuffix() {
-        return playerSuffix;
-    }
-
-    /**
-     * Returns {@link #nameTagVisibility}
-     *
-     * @return  nameTagVisibility
-     */
-    public String getNameTagVisibility() {
-        return nameTagVisibility;
-    }
-    
-    /**
-     * Returns {@link #collisionRule}
-     *
-     * @return  collisionRule
-     */
-    public String getCollisionRule() {
-        return collisionRule;
-    }
-
-    /**
-     * Sets {@link #color} to specified color
-     * 
-     * @param   color
-     *          color to use
-     */
-    public void setColor(EnumChatFormat color) {
-        this.color = color;
-    }
-
-    /**
-     * Returns {@link #color}
-     *
-     * @return  color
-     */
-    public EnumChatFormat getColor() {
-        return color;
-    }
-
-    /**
-     * Returns {@link #players}
-     *
-     * @return  players
-     */
-    public Collection<String> getPlayers() {
-        return players;
-    }
-
-    /**
-     * Returns {@link #options}
-     *
-     * @return  team options
-     */
-    public int getOptions() {
-        return options;
-    }
-    
-    /**
-     * Returns {@link #action}
-     *
-     * @return  packet action
-     */
-    public int getAction() {
-        return action;
-    }
 }

api/src/main/java/me/neznamy/tab/api/protocol/Skin.java

@@ -1,59 +1,18 @@
 package me.neznamy.tab.api.protocol;
 
-import me.neznamy.tab.api.util.Preconditions;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NonNull;
 
 /**
  * Class representing a minecraft skin as a value - signature pair.
  */
+@Data @AllArgsConstructor
 public class Skin {
 
     /** Skin value */
-    private final String value;
+    @NonNull private final String value;
 
     /** Skin signature, can be null */
     private final String signature;
-
-    /**
-     * Constructs new instance with given parameters
-     *
-     * @param   value
-     *          skin value
-     * @param   signature
-     *          skin signature
-     * @throws  IllegalArgumentException
-     *          if {@code value} is {@code null}
-     */
-    public Skin(String value, String signature) {
-        Preconditions.checkNotNull(value, "value");
-        this.value = value;
-        this.signature = signature;
-    }
-
-    /**
-     * Returns skin value
-     *
-     * @return  skin value
-     */
-    public String getValue() {
-        return value;
-    }
-
-    /**
-     * Returns skin signature
-     *
-     * @return  skin signature
-     */
-    public String getSignature() {
-        return signature;
-    }
-
-    /**
-     * Returns user-friendly representation of this object
-     *
-     * @return  user-friendly representation of this object
-     */
-    @Override
-    public String toString() {
-        return String.format("Skin{value=%s,signature=%s}", value, signature);
-    }
 }

api/src/main/java/me/neznamy/tab/api/scoreboard/Scoreboard.java

@@ -74,7 +74,7 @@ public interface Scoreboard {
      * @param   index
      *          Index of line to remove, starting at 0
      * @throws  IndexOutOfBoundsException
-     *          if the index is out of range (index < 0 || index >= {@link #getLines()}.size())
+     *          if the index is out of range (index < 0 || index >= {@link #getLines()}.size())
      * @see     #getLines()
      * @see     #addLine(String)
      */

api/src/main/java/me/neznamy/tab/api/task/RepeatingTask.java

@@ -1,10 +0,0 @@
-package me.neznamy.tab.api.task;
-
-public interface RepeatingTask {
-    
-    int getInterval();
-
-    void setInterval(int paramInt);
-
-    void cancel();
-}

api/src/main/java/me/neznamy/tab/api/task/ThreadManager.java

@@ -4,6 +4,10 @@ import java.util.concurrent.Future;
 
 import me.neznamy.tab.api.TabFeature;
 
+/**
+ * Manager for scheduling and executing tasks in TAB's
+ * main thread to avoid concurrency issues.
+ */
 public interface ThreadManager {
 
     /**

api/src/main/java/me/neznamy/tab/api/util/BiFunctionWithException.java

@@ -2,7 +2,7 @@ package me.neznamy.tab.api.util;
 
 /**
  * An interface for BiFunction which can throw an exception.
- * Used in {@link me.neznamy.tab.api.protocol.PacketBuilder} to 
+ * Used in {@link me.neznamy.tab.api.protocol.PacketBuilder} to
  * call build method for packet classes, which may throw an
  * exception due to reflection.
  * @param   <A>
@@ -14,5 +14,16 @@ package me.neznamy.tab.api.util;
  */
 public interface BiFunctionWithException<A, B, C> {
 
+    /**
+     * Runs the function and returns the result
+     *
+     * @param   a
+     *          First argument
+     * @param   b
+     *          Second argument
+     * @return  Output from function
+     * @throws  ReflectiveOperationException
+     *          If reflective operation fails
+     */
     C apply(A a, B b) throws ReflectiveOperationException;
 }

api/src/main/java/me/neznamy/tab/api/util/ComponentCache.java

@@ -0,0 +1,30 @@
+package me.neznamy.tab.api.util;
+
+import lombok.AllArgsConstructor;
+import me.neznamy.tab.api.ProtocolVersion;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@AllArgsConstructor
+public class ComponentCache<K, V> {
+
+    private final int cacheSize;
+    private final BiFunctionWithException<K, ProtocolVersion, V> function;
+    private final Map<K, V> cacheModern = new HashMap<>();
+    private final Map<K, V> cacheLegacy = new HashMap<>();
+
+    public V get(K key, ProtocolVersion clientVersion) {
+        try {
+            if (key == null) return null;
+            Map<K, V> cache = clientVersion == null || clientVersion.getMinorVersion() >= 16 ? cacheModern : cacheLegacy;
+            if (cache.containsKey(key)) return cache.get(key);
+            V value = function.apply(key, clientVersion);
+            if (cache.size() > cacheSize) cache.clear();
+            cache.put(key, value);
+            return value;
+        } catch (ReflectiveOperationException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

api/src/main/java/me/neznamy/tab/api/util/Preconditions.java

@@ -1,25 +1,61 @@
 package me.neznamy.tab.api.util;
 
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+import lombok.NonNull;
 import me.neznamy.tab.api.TabPlayer;
 
+/**
+ * Class with utility methods used in the plugin
+ */
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
 public class Preconditions {
 
-    private Preconditions(){}
-
-    public static void checkNotNull(Object obj, String name){
-        if (obj == null) throw new IllegalArgumentException(name + " cannot be null");
-    }
-
-    public static void checkMaxLength(String string, int maxLength, String name) {
-        checkNotNull(string, name);
+    /**
+     * Checks length of String and throws {@code IllegalArgumentException} if it is
+     * longer than limit.
+     *
+     * @param   string
+     *          String to check
+     * @param   maxLength
+     *          Maximum length of the string
+     * @param   name
+     *          Name of the variable to use in exception message
+     * @throws  IllegalArgumentException
+     *          if {@code string} is {@code null} or longer than {@code maxLength} characters
+     */
+    public static void checkMaxLength(@NonNull String string, int maxLength, String name) {
         if (string.length() > maxLength) throw new IllegalArgumentException(name + " is longer than " + maxLength + " characters (" + string.length() + ")");
     }
 
-    public static void checkRange(Number number, Number min, Number max, String variable){
+    /**
+     * Checks number range and throws {@code IllegalArgumentException} if number
+     * is out of range.
+     *
+     * @param   number
+     *          Number to check
+     * @param   min
+     *          Minimum allowed value
+     * @param   max
+     *          Maximum allowed value
+     * @param   variable
+     *          Variable name to use in exception message
+     * @throws  IllegalArgumentException
+     *          if {@code number} is out of range ({@code number < min || number > max})
+     */
+    public static void checkRange(Number number, Number min, Number max, String variable) {
         if (number.doubleValue() < min.doubleValue() || number.doubleValue() > max.doubleValue())
-            throw new IllegalArgumentException(variable + " index out of range (" + min + " - " + max + ")");
+            throw new IllegalArgumentException(variable + " index out of range (" + min + " - " + max + "), was " + number);
     }
 
+    /**
+     * Checks if player is loaded and throws {@code IllegalStateException} if not.
+     *
+     * @param   player
+     *          Player to check
+     * @throws  IllegalStateException
+     *          If player is not loaded
+     */
     public static void checkLoaded(TabPlayer player) {
         if (!player.isLoaded()) throw new IllegalStateException("Player is not loaded yet. Try again later.");
     }

api/src/main/java/me/neznamy/tab/api/util/ReflectionUtils.java

@@ -0,0 +1,24 @@
+package me.neznamy.tab.api.util;
+
+/**
+ * Utility class storing methods working with reflection
+ */
+public class ReflectionUtils {
+
+    /**
+     * Returns {@code true} if class with given full name exists,
+     * {@code false} if not.
+     *
+     * @param   path
+     *          Full class path and name
+     * @return  {@code true} if exists, {@code false} if not
+     */
+    public static boolean classExists(String path) {
+        try {
+            Class.forName(path);
+            return true;
+        } catch (ClassNotFoundException | NullPointerException e) {
+            return false;
+        }
+    }
+}

api/src/main/java/me/neznamy/tab/api/util/SupplierWithException.java

@@ -0,0 +1,12 @@
+package me.neznamy.tab.api.util;
+
+/**
+ * Supplier that can throw an exception
+ *
+ * @param   <T>
+ *          Return class type
+ */
+public interface SupplierWithException<T> {
+
+    T get() throws Exception;
+}

build-logic/build.gradle.kts

@@ -2,11 +2,16 @@ plugins {
     `kotlin-dsl`
 }
 
-repositories {
-    gradlePluginPortal()
-    mavenCentral()
+dependencies {
+    implementation(libs.plugin.shadow)
+    implementation(libs.plugin.lombok)
 }
 
 dependencies {
-    implementation("gradle.plugin.com.github.johnrengelman", "shadow", "7.1.0")
+    compileOnly(files(libs::class.java.protectionDomain.codeSource.location))
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
 }

build-logic/settings.gradle.kts

@@ -0,0 +1,16 @@
+rootProject.name = "build-logic"
+
+dependencyResolutionManagement {
+    repositories {
+        gradlePluginPortal()
+        mavenCentral()
+    }
+    // You're a great IDE IntelliJ, but sometimes you really annoy me. >:(
+//    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+
+    versionCatalogs {
+        register("libs") {
+            from(files("../gradle/libs.versions.toml"))
+        }
+    }
+}

build-logic/src/main/kotlin/tab.base-conventions.gradle.kts

@@ -2,6 +2,7 @@ import org.apache.tools.ant.filters.ReplaceTokens
 
 plugins {
     `java-library`
+    id("io.freefair.lombok")
 }
 
 tasks {
@@ -9,7 +10,8 @@ tasks {
         filter<ReplaceTokens>("tokens" to mapOf(
             "name" to rootProject.name,
             "version" to project.version,
-            "description" to project.description
+            "description" to project.description,
+            "website" to rootProject.ext.get("website")!!.toString()
         ))
     }
     javadoc {

build-logic/src/main/kotlin/tab.platform-conventions.gradle.kts

@@ -9,5 +9,6 @@ tasks {
         relocate("org.bstats", "me.neznamy.tab.libs.org.bstats")
         relocate("org.json.simple", "me.neznamy.tab.libs.org.json.simple")
         relocate("net.kyori.event", "me.neznamy.tab.libs.net.kyori.event")
+        relocate("me.neznamy.yamlassist", "me.neznamy.tab.libs.yamlassist")
     }
 }

build-logic/src/main/kotlin/tab.standard-conventions.gradle.kts

@@ -1,9 +1,3 @@
-import gradle.kotlin.dsl.accessors._4cbb0020bd75d48acc42cabded5fdbb7.publishing
-import org.gradle.api.artifacts.repositories.PasswordCredentials
-import org.gradle.api.publish.maven.MavenPublication
-import org.gradle.kotlin.dsl.get
-import org.gradle.kotlin.dsl.repositories
-
 plugins {
     id("tab.base-conventions")
     `maven-publish`

build.gradle.kts

@@ -4,15 +4,21 @@ plugins {
 
 allprojects {
     group = "me.neznamy"
-    version = property("projectVersion") as String // from gradle.properties
+    version = "3.3.1"
     description = "An all-in-one solution that works"
+
+    ext.set("id", "tab")
+    ext.set("website", "https://github.com/NEZNAMY/TAB")
+    ext.set("author", "NEZNAMY")
 }
 
 val platforms = setOf(
     projects.bukkit,
     projects.bungeecord,
-//    projects.krypton,
-    projects.velocity
+    projects.krypton,
+    projects.velocity,
+    projects.sponge7,
+    projects.sponge8
 ).map { it.dependencyProject }
 
 val special = setOf(

bukkit/build.gradle.kts

@@ -4,9 +4,5 @@ dependencies {
     compileOnly(libs.bukkit)
     compileOnly(libs.placeholderapi)
     compileOnly(libs.vault)
-    compileOnly(libs.via)
     compileOnly(libs.authlib)
-    compileOnly(libs.essentials) {
-        exclude("org.spigotmc", "spigot-api")
-    }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitEventListener.java

@@ -1,5 +1,6 @@
 package me.neznamy.tab.platforms.bukkit;
 
+import lombok.RequiredArgsConstructor;
 import me.neznamy.tab.api.TabAPI;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.EventPriority;
@@ -12,20 +13,11 @@ import org.bukkit.event.player.PlayerQuitEvent;
 /**
  * The core for bukkit forwarding events into all enabled features
  */
+@RequiredArgsConstructor
 public class BukkitEventListener implements Listener {
 
     /** Platform instance */
     private final BukkitPlatform platform;
-
-    /**
-     * Constructs new instance with given parameter
-     *
-     * @param   platform
-     *          Platform instance
-     */
-    public BukkitEventListener(BukkitPlatform platform) {
-        this.platform = platform;
-    }
     
     /**
      * Listener to PlayerQuitEvent to remove player data and forward the event to features
@@ -34,7 +26,7 @@ public class BukkitEventListener implements Listener {
      *          quit event
      */
     @EventHandler(priority = EventPriority.HIGHEST)
-    public void onQuit(PlayerQuitEvent e){
+    public void onQuit(PlayerQuitEvent e) {
         if (TabAPI.getInstance().isPluginDisabled()) return;
         TabAPI.getInstance().getThreadManager().runTask(() -> TabAPI.getInstance().getFeatureManager().onQuit(TabAPI.getInstance().getPlayer(e.getPlayer().getUniqueId())));
     }
@@ -48,7 +40,8 @@ public class BukkitEventListener implements Listener {
     @EventHandler(priority = EventPriority.LOWEST)
     public void onJoin(PlayerJoinEvent e) {
         if (TabAPI.getInstance().isPluginDisabled()) return;
-        TabAPI.getInstance().getThreadManager().runTask(() -> TabAPI.getInstance().getFeatureManager().onJoin(new BukkitTabPlayer(e.getPlayer(), platform.getProtocolVersion(e.getPlayer()))));
+        TabAPI.getInstance().getThreadManager().runTask(() ->
+                TabAPI.getInstance().getFeatureManager().onJoin(new BukkitTabPlayer(e.getPlayer(), platform.getProtocolVersion(e.getPlayer()))));
     }
 
     /**
@@ -58,9 +51,10 @@ public class BukkitEventListener implements Listener {
      *          world changed event
      */
     @EventHandler(priority = EventPriority.LOWEST)
-    public void onWorldChange(PlayerChangedWorldEvent e){
+    public void onWorldChange(PlayerChangedWorldEvent e) {
         if (TabAPI.getInstance().isPluginDisabled()) return;
-        TabAPI.getInstance().getThreadManager().runTask(() -> TabAPI.getInstance().getFeatureManager().onWorldChange(e.getPlayer().getUniqueId(), e.getPlayer().getWorld().getName()));
+        TabAPI.getInstance().getThreadManager().runTask(() ->
+                TabAPI.getInstance().getFeatureManager().onWorldChange(e.getPlayer().getUniqueId(), e.getPlayer().getWorld().getName()));
     }
 
     /**
@@ -72,6 +66,7 @@ public class BukkitEventListener implements Listener {
     @EventHandler
     public void onCommand(PlayerCommandPreprocessEvent e) {
         if (TabAPI.getInstance().isPluginDisabled()) return;
-        if (TabAPI.getInstance().getFeatureManager().onCommand(TabAPI.getInstance().getPlayer(e.getPlayer().getUniqueId()), e.getMessage())) e.setCancelled(true);
+        if (TabAPI.getInstance().getFeatureManager().onCommand(
+                TabAPI.getInstance().getPlayer(e.getPlayer().getUniqueId()), e.getMessage())) e.setCancelled(true);
     }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitPacketBuilder.java

@@ -1,63 +1,38 @@
 package me.neznamy.tab.platforms.bukkit;
 
-import com.mojang.authlib.GameProfile;
-import com.mojang.authlib.properties.Property;
 import me.neznamy.tab.api.ProtocolVersion;
-import me.neznamy.tab.api.TabAPI;
-import me.neznamy.tab.api.chat.EnumChatFormat;
-import me.neznamy.tab.api.chat.IChatBaseComponent;
-import me.neznamy.tab.api.chat.WrappedChatComponent;
 import me.neznamy.tab.api.protocol.*;
 import me.neznamy.tab.api.protocol.PacketPlayOutBoss.Action;
-import me.neznamy.tab.api.protocol.PacketPlayOutPlayerInfo.EnumGamemode;
-import me.neznamy.tab.api.protocol.PacketPlayOutPlayerInfo.EnumPlayerInfoAction;
-import me.neznamy.tab.api.protocol.PacketPlayOutPlayerInfo.PlayerInfoData;
-import me.neznamy.tab.platforms.bukkit.nms.*;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutSpawnEntityLivingStorage;
 import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
-import org.bukkit.Location;
+import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.*;
+import me.neznamy.tab.shared.backend.protocol.PacketPlayOutEntityDestroy;
+import me.neznamy.tab.shared.backend.protocol.PacketPlayOutEntityMetadata;
+import me.neznamy.tab.shared.backend.protocol.PacketPlayOutEntityTeleport;
+import me.neznamy.tab.shared.backend.protocol.PacketPlayOutSpawnEntityLiving;
 import org.bukkit.entity.EntityType;
 
-import java.lang.reflect.Array;
-import java.util.*;
+import java.util.UUID;
 
-@SuppressWarnings({"unchecked", "rawtypes"})
 public class BukkitPacketBuilder extends PacketBuilder {
 
-    /** NMS data storage */
-    private final NMSStorage nms = NMSStorage.getInstance();
-
-    /** Map of entity type ids for entities used by the plugin */
-    private final EnumMap<EntityType, Integer> entityIds = new EnumMap<>(EntityType.class);
-
-    /** Component cache for better performance (1.16+ players) */
-    private final Map<IChatBaseComponent, Object> componentCacheModern = new HashMap<>();
-
-    /** Component cache for better performance (1.15- players) */
-    private final Map<IChatBaseComponent, Object> componentCacheLegacy = new HashMap<>();
-
-    /**
-     * Constructs new instance
-     */
-    public BukkitPacketBuilder() {
-        if (nms.getMinorVersion() >= 19) {
-            entityIds.put(EntityType.ARMOR_STAND, 2);
-        } else if (nms.getMinorVersion() >= 13) {
-            entityIds.put(EntityType.ARMOR_STAND, 1);
-        } else {
-            entityIds.put(EntityType.WITHER, 64);
-            if (nms.getMinorVersion() >= 8){
-                entityIds.put(EntityType.ARMOR_STAND, 30);
-            }
-        }
-        buildMap.put(PacketPlayOutEntityMetadata.class, (packet, version) -> build((PacketPlayOutEntityMetadata)packet));
-        buildMap.put(PacketPlayOutEntityTeleport.class, (packet, version) -> build((PacketPlayOutEntityTeleport)packet));
-        buildMap.put(PacketPlayOutEntityDestroy.class, (packet, version) -> build((PacketPlayOutEntityDestroy)packet));
-        buildMap.put(PacketPlayOutSpawnEntityLiving.class, (packet, version) -> build((PacketPlayOutSpawnEntityLiving)packet));
+    {
+        buildMap.put(PacketPlayOutEntityMetadata.class, (packet, version) -> PacketPlayOutEntityMetadataStorage.build((PacketPlayOutEntityMetadata) packet));
+        buildMap.put(PacketPlayOutEntityTeleport.class, (packet, version) -> PacketPlayOutEntityTeleportStorage.build((PacketPlayOutEntityTeleport) packet));
+        buildMap.put(PacketPlayOutEntityDestroy.class, (packet, version) -> PacketPlayOutEntityDestroyStorage.build((PacketPlayOutEntityDestroy) packet));
+        buildMap.put(PacketPlayOutSpawnEntityLiving.class, (packet, version) -> PacketPlayOutSpawnEntityLivingStorage.build((PacketPlayOutSpawnEntityLiving) packet));
+        buildMap.put(PacketPlayOutPlayerListHeaderFooter.class, (packet, version) -> PacketPlayOutPlayerListHeaderFooterStorage.build((PacketPlayOutPlayerListHeaderFooter) packet, version));
+        buildMap.put(PacketPlayOutChat.class, (packet, version) -> PacketPlayOutChatStorage.build((PacketPlayOutChat) packet, version));
+        buildMap.put(PacketPlayOutScoreboardObjective.class, (packet, version) -> PacketPlayOutScoreboardObjectiveStorage.build((PacketPlayOutScoreboardObjective) packet, version));
+        buildMap.put(PacketPlayOutScoreboardDisplayObjective.class, (packet, version) -> PacketPlayOutScoreboardDisplayObjectiveStorage.build((PacketPlayOutScoreboardDisplayObjective) packet, version));
+        buildMap.put(PacketPlayOutScoreboardTeam.class, (packet, version) -> PacketPlayOutScoreboardTeamStorage.build((PacketPlayOutScoreboardTeam) packet, version));
+        buildMap.put(PacketPlayOutScoreboardScore.class, (packet, version) -> PacketPlayOutScoreboardScoreStorage.build((PacketPlayOutScoreboardScore) packet, version));
     }
 
     @Override
     public Object build(PacketPlayOutBoss packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
-        if (nms.getMinorVersion() >= 9 || clientVersion.getMinorVersion() >= 9) {
+        if (NMSStorage.getInstance().getMinorVersion() >= 9 || clientVersion.getMinorVersion() >= 9) {
             //1.9+ server or client, handled by bukkit api or ViaVersion
             return packet;
         }
@@ -65,330 +40,28 @@ public class BukkitPacketBuilder extends PacketBuilder {
         return buildBossPacketEntity(packet, clientVersion);
     }
 
-    @Override
-    public Object build(PacketPlayOutChat packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
-        Object component = toNMSComponent(packet.getMessage(), clientVersion);
-        if (nms.getMinorVersion() >= 19)
-            try {
-                return nms.newPacketPlayOutChat.newInstance(component, packet.getType() == PacketPlayOutChat.ChatMessageType.GAME_INFO);
-            } catch (Exception e) {
-                //1.19.0
-                return nms.newPacketPlayOutChat.newInstance(component, packet.getType().ordinal());
-            }
-        if (nms.getMinorVersion() >= 16)
-            return nms.newPacketPlayOutChat.newInstance(component, nms.ChatMessageType_values[packet.getType().ordinal()], UUID.randomUUID());
-        if (nms.getMinorVersion() >= 12)
-            return nms.newPacketPlayOutChat.newInstance(component, Enum.valueOf((Class<Enum>) nms.ChatMessageType, packet.getType().toString()));
-        if (nms.getMinorVersion() >= 8)
-            return nms.newPacketPlayOutChat.newInstance(component, (byte) packet.getType().ordinal());
-        if (nms.getMinorVersion() == 7)
-            return nms.newPacketPlayOutChat.newInstance(component);
-        return packet;
-    }
-
     @Override
     public Object build(PacketPlayOutPlayerInfo packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
-        if (nms.getMinorVersion() < 8) return null;
-        Object nmsPacket = nms.newPacketPlayOutPlayerInfo.newInstance(nms.EnumPlayerInfoAction_values[packet.getAction().ordinal()], Array.newInstance(nms.EntityPlayer, 0));
-        List<Object> items = new ArrayList<>();
-        for (PlayerInfoData data : packet.getEntries()) {
-            GameProfile profile = new GameProfile(data.getUniqueId(), data.getName());
-            if (data.getSkin() != null) profile.getProperties().put("textures", new Property("textures", data.getSkin().getValue(), data.getSkin().getSignature()));
-            List<Object> parameters = new ArrayList<>();
-            if (nms.newPlayerInfoData.getParameterTypes()[0] == nms.PacketPlayOutPlayerInfo) {
-                parameters.add(nmsPacket);
-            }
-            parameters.add(profile);
-            parameters.add(data.getLatency());
-            parameters.add(data.getGameMode() == null ? null : nms.EnumGamemode_values[nms.EnumGamemode_values.length-EnumGamemode.VALUES.length+data.getGameMode().ordinal()]); //not_set was removed in 1.17
-            parameters.add(data.getDisplayName() == null ? null : toNMSComponent(data.getDisplayName(), clientVersion));
-            if (nms.getMinorVersion() >= 19) parameters.add(data.getProfilePublicKey());
-            items.add(nms.newPlayerInfoData.newInstance(parameters.toArray()));
-        }
-        nms.setField(nmsPacket, nms.PacketPlayOutPlayerInfo_PLAYERS, items);
-        return nmsPacket;
+        return PacketPlayOutPlayerInfoStorage.build(packet, clientVersion);
     }
 
-    @Override
-    public Object build(PacketPlayOutPlayerListHeaderFooter packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
-        if (nms.getMinorVersion() < 8) return null;
-        if (nms.newPacketPlayOutPlayerListHeaderFooter.getParameterCount() == 2) {
-            return nms.newPacketPlayOutPlayerListHeaderFooter.newInstance(toNMSComponent(packet.getHeader(), clientVersion), toNMSComponent(packet.getFooter(), clientVersion));
-        }
-        Object nmsPacket = nms.newPacketPlayOutPlayerListHeaderFooter.newInstance();
-        nms.setField(nmsPacket, nms.PacketPlayOutPlayerListHeaderFooter_HEADER, toNMSComponent(packet.getHeader(), clientVersion));
-        nms.setField(nmsPacket, nms.PacketPlayOutPlayerListHeaderFooter_FOOTER, toNMSComponent(packet.getFooter(), clientVersion));
-        return nmsPacket;
-    }
-
-    @Override
-    public Object build(PacketPlayOutScoreboardDisplayObjective packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
-        return nms.newPacketPlayOutScoreboardDisplayObjective.newInstance(packet.getSlot(), newScoreboardObjective(packet.getObjectiveName()));
-    }
-
-    @Override
-    public Object build(PacketPlayOutScoreboardObjective packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
-        String displayName = clientVersion.getMinorVersion() < 13 ? cutTo(packet.getDisplayName(), 32) : packet.getDisplayName();
-        if (nms.getMinorVersion() >= 13) {
-            return nms.newPacketPlayOutScoreboardObjective.newInstance(nms.newScoreboardObjective.newInstance(null, packet.getObjectiveName(), null, 
-                    toNMSComponent(IChatBaseComponent.optimizedComponent(displayName), clientVersion), 
-                    packet.getRenderType() == null ? null : nms.EnumScoreboardHealthDisplay_values[packet.getRenderType().ordinal()]), 
-                    packet.getAction());
-        }
-
-        Object nmsPacket = nms.newPacketPlayOutScoreboardObjective.newInstance();
-        nms.setField(nmsPacket, nms.PacketPlayOutScoreboardObjective_OBJECTIVENAME, packet.getObjectiveName());
-        nms.setField(nmsPacket, nms.PacketPlayOutScoreboardObjective_DISPLAYNAME, displayName);
-        if (nms.getMinorVersion() >= 8 && packet.getRenderType() != null) {
-            nms.setField(nmsPacket, nms.PacketPlayOutScoreboardObjective_RENDERTYPE, Enum.valueOf((Class<Enum>) nms.EnumScoreboardHealthDisplay, packet.getRenderType().toString()));
-        }
-        nms.setField(nmsPacket, nms.PacketPlayOutScoreboardObjective_METHOD, packet.getAction());
-        return nmsPacket;
-    }
-
-    @Override
-    public Object build(PacketPlayOutScoreboardScore packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
-        if (nms.getMinorVersion() >= 13) {
-            return nms.newPacketPlayOutScoreboardScore_1_13.newInstance(nms.EnumScoreboardAction_values[packet.getAction().ordinal()], packet.getObjectiveName(), packet.getPlayer(), packet.getScore());
-        }
-        if (packet.getAction() == PacketPlayOutScoreboardScore.Action.REMOVE) {
-            return nms.newPacketPlayOutScoreboardScore_String.newInstance(packet.getPlayer());
-        }
-        Object score = nms.newScoreboardScore.newInstance(nms.emptyScoreboard, newScoreboardObjective(packet.getObjectiveName()), packet.getPlayer());
-        nms.ScoreboardScore_setScore.invoke(score, packet.getScore());
-        if (nms.getMinorVersion() >= 8) {
-            return nms.newPacketPlayOutScoreboardScore.newInstance(score);
-        }
-        return nms.newPacketPlayOutScoreboardScore.newInstance(score, 0);
-    }
-
-    @Override
-    public Object build(PacketPlayOutScoreboardTeam packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
-        if (nms.PacketPlayOutScoreboardTeam == null) return null; //fabric
-        Object team = nms.newScoreboardTeam.newInstance(nms.emptyScoreboard, packet.getName());
-        String prefix = packet.getPlayerPrefix();
-        String suffix = packet.getPlayerSuffix();
-        if (clientVersion.getMinorVersion() < 13) {
-            prefix = cutTo(prefix, 16);
-            suffix = cutTo(suffix, 16);
-        }
-        ((Collection<String>)nms.ScoreboardTeam_getPlayerNameSet.invoke(team)).addAll(packet.getPlayers());
-        nms.ScoreboardTeam_setAllowFriendlyFire.invoke(team, (packet.getOptions() & 0x1) > 0);
-        nms.ScoreboardTeam_setCanSeeFriendlyInvisibles.invoke(team, (packet.getOptions() & 0x2) > 0);
-        if (nms.getMinorVersion() >= 13) {
-            createTeamModern(packet, clientVersion, team, prefix, suffix);
-        } else {
-            createTeamLegacy(packet, team, prefix, suffix);
-        }
-        if (nms.getMinorVersion() >= 17) {
-            switch (packet.getAction()) {
-            case 0:
-                return nms.PacketPlayOutScoreboardTeam_ofBoolean.invoke(null, team, true);
-            case 1:
-                return nms.PacketPlayOutScoreboardTeam_of.invoke(null, team);
-            case 2:
-                return nms.PacketPlayOutScoreboardTeam_ofBoolean.invoke(null, team, false);
-            case 3:
-                return nms.PacketPlayOutScoreboardTeam_ofString.invoke(null, team, packet.getPlayers().toArray(new String[0])[0], nms.PacketPlayOutScoreboardTeam_PlayerAction_values[0]);
-            case 4:
-                return nms.PacketPlayOutScoreboardTeam_ofString.invoke(null, team, packet.getPlayers().toArray(new String[0])[0], nms.PacketPlayOutScoreboardTeam_PlayerAction_values[1]);
-            default:
-                throw new IllegalArgumentException("Invalid action: " + packet.getAction());
-            }
-        }
-        return nms.newPacketPlayOutScoreboardTeam.newInstance(team, packet.getAction());
-    }
-
-    /**
-     * Builds entity destroy packet from custom packet class
-     *
-     * @param   packet
-     *          Destroy packet
-     * @return  NMS destroy packet
-     * @throws  ReflectiveOperationException
-     *          if thrown by reflective operation
-     */
-    public Object build(PacketPlayOutEntityDestroy packet) throws ReflectiveOperationException {
-        try {
-            return nms.newPacketPlayOutEntityDestroy.newInstance(new Object[]{packet.getEntities()});
-        } catch (IllegalArgumentException e) {
-            //1.17.0
-            return nms.newPacketPlayOutEntityDestroy.newInstance(packet.getEntities()[0]);
-        }
-    }
-
-    /**
-     * Builds entity metadata packet from custom packet class
-     *
-     * @param   packet
-     *          Metadata packet
-     * @return  NMS metadata packet
-     * @throws  ReflectiveOperationException
-     *          if thrown by reflective operation
-     */
-    public Object build(PacketPlayOutEntityMetadata packet) throws ReflectiveOperationException {
-        return nms.newPacketPlayOutEntityMetadata.newInstance(packet.getEntityId(), packet.getDataWatcher().toNMS(), true);
-    }
-
-    /**
-     * Builds entity spawn packet from custom packet class
-     *
-     * @param   packet
-     *          Spawn packet
-     * @return  NMS spawn packet
-     * @throws  ReflectiveOperationException
-     *          if thrown by reflective operation
-     */
-    public Object build(PacketPlayOutSpawnEntityLiving packet) throws ReflectiveOperationException {
-        Object nmsPacket;
-        if (nms.getMinorVersion() >= 17) {
-            nmsPacket = nms.newPacketPlayOutSpawnEntityLiving.newInstance(nms.dummyEntity);
-        } else {
-            nmsPacket = nms.newPacketPlayOutSpawnEntityLiving.newInstance();
-        }
-        nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_ENTITYID, packet.getEntityId());
-        nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_YAW, (byte)(packet.getLocation().getYaw() * 256.0f / 360.0f));
-        nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_PITCH, (byte)(packet.getLocation().getPitch() * 256.0f / 360.0f));
-        if (nms.getMinorVersion() <= 14) {
-            nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_DATAWATCHER, packet.getDataWatcher().toNMS());
-        }
-        if (nms.getMinorVersion() >= 9) {
-            nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_UUID, packet.getUniqueId());
-            nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_X, packet.getLocation().getX());
-            nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_Y, packet.getLocation().getY());
-            nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_Z, packet.getLocation().getZ());
-        } else {
-            nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_X, floor(packet.getLocation().getX()*32));
-            nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_Y, floor(packet.getLocation().getY()*32));
-            nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_Z, floor(packet.getLocation().getZ()*32));
-        }
-        int id = entityIds.get(packet.getEntityType());
-        if (nms.getMinorVersion() >= 19) {
-            nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_ENTITYTYPE, nms.Registry_a.invoke(nms.IRegistry_X, id));
-        } else {
-            nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_ENTITYTYPE, id);
-        }
-        return nmsPacket;
-    }
-
-    /**
-     * Builds entity teleport packet from custom packet class
-     *
-     * @param   packet
-     *          Teleport packet
-     * @return  NMS teleport packet
-     * @throws  ReflectiveOperationException
-     *          if thrown by reflective operation
-     */
-    public Object build(PacketPlayOutEntityTeleport packet) throws ReflectiveOperationException {
-        Object nmsPacket;
-        if (nms.getMinorVersion() >= 17) {
-            nmsPacket = nms.newPacketPlayOutEntityTeleport.newInstance(nms.dummyEntity);
-        } else {
-            nmsPacket = nms.newPacketPlayOutEntityTeleport.newInstance();
-        }
-        nms.setField(nmsPacket, nms.PacketPlayOutEntityTeleport_ENTITYID, packet.getEntityId());
-        if (nms.getMinorVersion() >= 9) {
-            nms.setField(nmsPacket, nms.PacketPlayOutEntityTeleport_X, packet.getLocation().getX());
-            nms.setField(nmsPacket, nms.PacketPlayOutEntityTeleport_Y, packet.getLocation().getY());
-            nms.setField(nmsPacket, nms.PacketPlayOutEntityTeleport_Z, packet.getLocation().getZ());
-        } else {
-            nms.setField(nmsPacket, nms.PacketPlayOutEntityTeleport_X, floor(packet.getLocation().getX()*32));
-            nms.setField(nmsPacket, nms.PacketPlayOutEntityTeleport_Y, floor(packet.getLocation().getY()*32));
-            nms.setField(nmsPacket, nms.PacketPlayOutEntityTeleport_Z, floor(packet.getLocation().getZ()*32));
-        }
-        nms.setField(nmsPacket, nms.PacketPlayOutEntityTeleport_YAW, (byte) (packet.getLocation().getYaw()/360*256));
-        nms.setField(nmsPacket, nms.PacketPlayOutEntityTeleport_PITCH, (byte) (packet.getLocation().getPitch()/360*256));
-        return nmsPacket;
-    }
-
-    /**
-     * Writes data into NMS team from custom team packet. Used on 1.13+ servers.
-     *
-     * @param   packet
-     *          Packet to read from
-     * @param   clientVersion
-     *          Version of player
-     * @param   team
-     *          Team to write to
-     * @param   prefix
-     *          Prefix to use
-     * @param   suffix
-     *          Suffix to use
-     * @throws  ReflectiveOperationException
-     *          if thrown by reflective operation
-     */
-    private void createTeamModern(PacketPlayOutScoreboardTeam packet, ProtocolVersion clientVersion, Object team, String prefix, String suffix) throws ReflectiveOperationException {
-        if (prefix != null) nms.ScoreboardTeam_setPrefix.invoke(team, toNMSComponent(IChatBaseComponent.optimizedComponent(prefix), clientVersion));
-        if (suffix != null) nms.ScoreboardTeam_setSuffix.invoke(team, toNMSComponent(IChatBaseComponent.optimizedComponent(suffix), clientVersion));
-        EnumChatFormat format = packet.getColor() != null ? packet.getColor() : EnumChatFormat.lastColorsOf(prefix);
-        nms.ScoreboardTeam_setColor.invoke(team, nms.EnumChatFormat_values[format.ordinal()]);
-        nms.ScoreboardTeam_setNameTagVisibility.invoke(team, String.valueOf(packet.getNameTagVisibility()).equals("always") ? nms.EnumNameTagVisibility_values[0] : nms.EnumNameTagVisibility_values[1]);
-        nms.ScoreboardTeam_setCollisionRule.invoke(team, String.valueOf(packet.getCollisionRule()).equals("always") ? nms.EnumTeamPush_values[0] : nms.EnumTeamPush_values[1]);
-    }
-
-    /**
-     * Writes data into NMS team from custom team packet. Used on 1.12- servers.
-     *
-     * @param   packet
-     *          Packet to read from
-     * @param   team
-     *          Team to write to
-     * @param   prefix
-     *          Prefix to use
-     * @param   suffix
-     *          Suffix to use
-     * @throws  ReflectiveOperationException
-     *          if thrown by reflective operation
-     */
-    private void createTeamLegacy(PacketPlayOutScoreboardTeam packet, Object team, String prefix, String suffix) throws ReflectiveOperationException {
-        if (prefix != null) nms.ScoreboardTeam_setPrefix.invoke(team, prefix);
-        if (suffix != null) nms.ScoreboardTeam_setSuffix.invoke(team, suffix);
-        if (nms.getMinorVersion() >= 8) nms.ScoreboardTeam_setNameTagVisibility.invoke(team, String.valueOf(packet.getNameTagVisibility()).equals("always") ? nms.EnumNameTagVisibility_values[0] : nms.EnumNameTagVisibility_values[1]);
-        if (nms.getMinorVersion() >= 9) nms.ScoreboardTeam_setCollisionRule.invoke(team, String.valueOf(packet.getCollisionRule()).equals("always") ? nms.EnumTeamPush_values[0] : nms.EnumTeamPush_values[1]);
-    }
-    
     @Override
     public PacketPlayOutPlayerInfo readPlayerInfo(Object nmsPacket, ProtocolVersion clientVersion) throws ReflectiveOperationException {
-        if (nms.getMinorVersion() < 8) return null;
-        EnumPlayerInfoAction action = EnumPlayerInfoAction.valueOf(nms.PacketPlayOutPlayerInfo_ACTION.get(nmsPacket).toString());
-        List<PlayerInfoData> listData = new ArrayList<>();
-        for (Object nmsData : (List<?>) nms.PacketPlayOutPlayerInfo_PLAYERS.get(nmsPacket)) {
-            Object nmsGameMode = nms.PlayerInfoData_getGamemode.invoke(nmsData);
-            EnumGamemode gameMode = (nmsGameMode == null) ? null : EnumGamemode.valueOf(nmsGameMode.toString());
-            GameProfile profile = (GameProfile) nms.PlayerInfoData_getProfile.invoke(nmsData);
-            Object nmsComponent = nms.PlayerInfoData_getDisplayName.invoke(nmsData);
-            IChatBaseComponent listName = nmsComponent == null ? null : new WrappedChatComponent(nmsComponent);
-            Skin skin = null;
-            if (!profile.getProperties().get("textures").isEmpty()) {
-                Property pr = profile.getProperties().get("textures").iterator().next();
-                skin = new Skin(pr.getValue(), pr.getSignature());
-            }
-            Object profilePublicKey = nms.getMinorVersion() >= 19 ? nms.PlayerInfoData_getProfilePublicKeyRecord.invoke(nmsData) : null;
-            listData.add(new PlayerInfoData(profile.getName(), profile.getId(), skin,
-                    (int) nms.PlayerInfoData_getLatency.invoke(nmsData), gameMode, listName, profilePublicKey));
-        }
-        return new PacketPlayOutPlayerInfo(action, listData);
+        return PacketPlayOutPlayerInfoStorage.read(nmsPacket);
     }
 
     @Override
     public PacketPlayOutScoreboardObjective readObjective(Object nmsPacket) throws ReflectiveOperationException {
-        return new PacketPlayOutScoreboardObjective(nms.PacketPlayOutScoreboardObjective_METHOD.getInt(nmsPacket),
-                (String) nms.PacketPlayOutScoreboardObjective_OBJECTIVENAME.get(nmsPacket), null,
-                PacketPlayOutScoreboardObjective.EnumScoreboardHealthDisplay.INTEGER
-        );
+        return PacketPlayOutScoreboardObjectiveStorage.read(nmsPacket);
     }
 
     @Override
     public PacketPlayOutScoreboardDisplayObjective readDisplayObjective(Object nmsPacket) throws ReflectiveOperationException {
-        return new PacketPlayOutScoreboardDisplayObjective(
-            nms.PacketPlayOutScoreboardDisplayObjective_POSITION.getInt(nmsPacket),
-            (String) nms.PacketPlayOutScoreboardDisplayObjective_OBJECTIVENAME.get(nmsPacket)
-        );
+        return PacketPlayOutScoreboardDisplayObjectiveStorage.read(nmsPacket);
     }
 
     /**
-     * Builds entity BossBar packet
+     * Builds entity packet representing requested BossBar packet using Wither on 1.8- clients.
      *
      * @param   packet
      *          packet to build
@@ -403,73 +76,23 @@ public class BukkitPacketBuilder extends PacketBuilder {
 
         int entityId = packet.getId().hashCode();
         if (packet.getAction() == Action.REMOVE) {
-            return build(new PacketPlayOutEntityDestroy(entityId));
+            return build(new PacketPlayOutEntityDestroy(entityId), clientVersion);
         }
         DataWatcher w = new DataWatcher();
         if (packet.getAction() == Action.UPDATE_PCT || packet.getAction() == Action.ADD) {
             float health = 300*packet.getPct();
             if (health == 0) health = 1;
-            w.helper().setHealth(health);
+            w.getHelper().setHealth(health);
         }
         if (packet.getAction() == Action.UPDATE_NAME || packet.getAction() == Action.ADD) {
-            w.helper().setCustomName(packet.getName(), clientVersion);
+            w.getHelper().setCustomName(packet.getName(), clientVersion);
         }
         if (packet.getAction() == Action.ADD) {
-            w.helper().setEntityFlags((byte) 32);
-            w.helper().setWitherInvulnerableTime(880); // Magic number
-            return build(new PacketPlayOutSpawnEntityLiving(entityId, new UUID(0, 0), EntityType.WITHER, new Location(null, 0,0,0), w));
+            w.getHelper().setEntityFlags((byte) 32);
+            w.getHelper().setWitherInvulnerableTime(880); // Magic number
+            return build(new PacketPlayOutSpawnEntityLiving(entityId, new UUID(0, 0), EntityType.WITHER, 0, 0, 0, 0, 0, w), clientVersion);
         } else {
-            return build(new PacketPlayOutEntityMetadata(entityId, w));
+            return build(new PacketPlayOutEntityMetadata(entityId, w), clientVersion);
         }
     }
-
-    /**
-     * A method taken from minecraft code used to convert double to int
-     *
-     * @param   paramDouble
-     *          double value
-     * @return  int value
-     */
-    private int floor(double paramDouble){
-        int i = (int)paramDouble;
-        return paramDouble < i ? i - 1 : i;
-    }
-
-    /**
-     * Converts TAB's IChatBaseComponent into minecraft's component.
-     *
-     * @param   component
-     *          component to convert
-     * @param   clientVersion
-     *          client version used to decide RGB conversion
-     * @return  converted component
-     * @throws  ReflectiveOperationException
-     *          if thrown by reflective operation
-     */
-    public Object toNMSComponent(IChatBaseComponent component, ProtocolVersion clientVersion) throws ReflectiveOperationException {
-        if (component == null) return null;
-        if (component instanceof WrappedChatComponent) return ((WrappedChatComponent) component).get();
-        Map<IChatBaseComponent, Object> cache = clientVersion.getMinorVersion() >= 16 ? componentCacheModern : componentCacheLegacy;
-        if (cache.containsKey(component)) return cache.get(component);
-        if (cache.size() > 10000) cache.clear();
-        Object chat = nms.ChatSerializer_DESERIALIZE.invoke(null, component.toString(clientVersion));
-        cache.put(component, chat);
-        return chat;
-    }
-
-    /**
-     * Creates a new Scoreboard Objective with given name.
-     *
-     * @param   objectiveName
-     *          Objective name
-     * @return  NMS Objective
-     * @throws  ReflectiveOperationException
-     *          if thrown by reflective operation
-     */
-    private Object newScoreboardObjective(String objectiveName) throws ReflectiveOperationException {
-        if (nms.getMinorVersion() >= 13) {
-            return nms.newScoreboardObjective.newInstance(null, objectiveName, null, toNMSComponent(new IChatBaseComponent(""), TabAPI.getInstance().getServerVersion()), null);
-        }
-        return nms.newScoreboardObjective.newInstance(null, objectiveName, nms.IScoreboardCriteria_self.get(null));
-    }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitPipelineInjector.java

@@ -1,5 +1,6 @@
 package me.neznamy.tab.platforms.bukkit;
 
+import io.netty.channel.Channel;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.function.Function;
@@ -7,58 +8,64 @@ import java.util.function.Function;
 import io.netty.channel.ChannelDuplexHandler;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.ChannelPromise;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
 import me.neznamy.tab.api.TabFeature;
 import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
 import me.neznamy.tab.api.TabConstants;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutPlayerInfoStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutScoreboardDisplayObjectiveStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutScoreboardObjectiveStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutScoreboardTeamStorage;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.features.PipelineInjector;
+import me.neznamy.tab.shared.features.injection.NettyPipelineInjector;
+import me.neznamy.tab.shared.features.sorting.Sorting;
 import org.jetbrains.annotations.NotNull;
 
 /**
  * Pipeline injection for bukkit
  */
-public class BukkitPipelineInjector extends PipelineInjector {
+public class BukkitPipelineInjector extends NettyPipelineInjector {
 
     /** NMS data storage */
     private final NMSStorage nms = NMSStorage.getInstance();
 
+    @Getter private final Function<TabPlayer, ChannelDuplexHandler> channelFunction = BukkitChannelDuplexHandler::new;
+
     /**
      * Constructs new instance
      */
-    public BukkitPipelineInjector(){
+    public BukkitPipelineInjector() {
         super("packet_handler");
     }
 
     @Override
-    public Function<TabPlayer, ChannelDuplexHandler> getChannelFunction() {
-        return BukkitChannelDuplexHandler::new;
+    protected Channel getChannel(TabPlayer player) {
+        final BukkitTabPlayer bukkit = (BukkitTabPlayer) player;
+        try {
+            if (nms.CHANNEL != null) return (Channel) nms.CHANNEL.get(nms.NETWORK_MANAGER.get(bukkit.getPlayerConnection()));
+        } catch (final IllegalAccessException exception) {
+            TAB.getInstance().getErrorManager().printError("Failed to get channel of " + bukkit.getName(), exception);
+        }
+        return null;
     }
 
     /**
      * Custom channel duplex handler override
      */
+    @AllArgsConstructor
     public class BukkitChannelDuplexHandler extends ChannelDuplexHandler {
 
         /** Injected player */
         private final TabPlayer player;
 
-        /**
-         * Constructs new instance with given player
-         *
-         * @param   player
-         *          player to inject
-         */
-        public BukkitChannelDuplexHandler(TabPlayer player) {
-            this.player = player;
-        }
-
         @Override
         public void channelRead(@NotNull ChannelHandlerContext context, @NotNull Object packet) {
             try {
                 if (TAB.getInstance().getFeatureManager().onPacketReceive(player, packet)) return;
                 super.channelRead(context, packet);
-            } catch (Exception e){
+            } catch (Throwable e) {
                 TAB.getInstance().getErrorManager().printError("An error occurred when reading packets", e);
             }
         }
@@ -66,30 +73,32 @@ public class BukkitPipelineInjector extends PipelineInjector {
         @Override
         public void write(ChannelHandlerContext context, Object packet, ChannelPromise channelPromise) {
             try {
-                if (nms.PacketPlayOutPlayerInfo.isInstance(packet)) {
+                if (PacketPlayOutPlayerInfoStorage.CLASS.isInstance(packet) ||
+                   (PacketPlayOutPlayerInfoStorage.ClientboundPlayerInfoRemovePacket != null &&
+                   PacketPlayOutPlayerInfoStorage.ClientboundPlayerInfoRemovePacket.isInstance(packet))) {
                     super.write(context, TAB.getInstance().getFeatureManager().onPacketPlayOutPlayerInfo(player, packet), channelPromise);
                     return;
                 }
-                if (antiOverrideTeams && nms.PacketPlayOutScoreboardTeam != null && nms.PacketPlayOutScoreboardTeam.isInstance(packet)) {
+                if (antiOverrideTeams && PacketPlayOutScoreboardTeamStorage.CLASS.isInstance(packet)) {
                     long time = System.nanoTime();
                     modifyPlayers(packet);
                     TAB.getInstance().getCPUManager().addTime("NameTags", TabConstants.CpuUsageCategory.ANTI_OVERRIDE, System.nanoTime()-time);
                     super.write(context, packet, channelPromise);
                     return;
                 }
-                if (nms.PacketPlayOutScoreboardDisplayObjective.isInstance(packet)){
+                if (PacketPlayOutScoreboardDisplayObjectiveStorage.CLASS.isInstance(packet)) {
                     TAB.getInstance().getFeatureManager().onDisplayObjective(player, packet);
                 }
-                if (nms.PacketPlayOutScoreboardObjective.isInstance(packet)) {
+                if (PacketPlayOutScoreboardObjectiveStorage.CLASS.isInstance(packet)) {
                     TAB.getInstance().getFeatureManager().onObjective(player, packet);
                 }
                 TAB.getInstance().getFeatureManager().onPacketSend(player, packet);
-            } catch (Exception e){
+            } catch (Throwable e) {
                 TAB.getInstance().getErrorManager().printError("An error occurred when reading packets", e);
             }
             try {
                 super.write(context, packet, channelPromise);
-            } catch (Exception e) {
+            } catch (Throwable e) {
                 TAB.getInstance().getErrorManager().printError("Failed to forward packet " + packet.getClass().getSimpleName() + " to " + player.getName(), e);
             }
         }
@@ -104,10 +113,10 @@ public class BukkitPipelineInjector extends PipelineInjector {
          */
         @SuppressWarnings("unchecked")
         private void modifyPlayers(Object packetPlayOutScoreboardTeam) throws ReflectiveOperationException {
-            int action = nms.PacketPlayOutScoreboardTeam_ACTION.getInt(packetPlayOutScoreboardTeam);
+            int action = PacketPlayOutScoreboardTeamStorage.ACTION.getInt(packetPlayOutScoreboardTeam);
             if (action == 1 || action == 2 || action == 4) return;
-            Collection<String> players = (Collection<String>) nms.PacketPlayOutScoreboardTeam_PLAYERS.get(packetPlayOutScoreboardTeam);
-            String teamName = (String) nms.PacketPlayOutScoreboardTeam_NAME.get(packetPlayOutScoreboardTeam);
+            Collection<String> players = (Collection<String>) PacketPlayOutScoreboardTeamStorage.PLAYERS.get(packetPlayOutScoreboardTeam);
+            String teamName = (String) PacketPlayOutScoreboardTeamStorage.NAME.get(packetPlayOutScoreboardTeam);
             if (players == null) return;
             //creating a new list to prevent NoSuchFieldException in minecraft packet encoder when a player is removed
             Collection<String> newList = new ArrayList<>();
@@ -117,14 +126,15 @@ public class BukkitPipelineInjector extends PipelineInjector {
                     newList.add(entry);
                     continue;
                 }
+                Sorting sorting = (Sorting) TAB.getInstance().getFeatureManager().getFeature(TabConstants.Feature.SORTING);
                 if (!((TabFeature)TAB.getInstance().getTeamManager()).isDisabledPlayer(p) &&
-                        !TAB.getInstance().getTeamManager().hasTeamHandlingPaused(p) && !teamName.equals(p.getTeamName())) {
-                    logTeamOverride(teamName, p.getName(), p.getTeamName());
+                        !TAB.getInstance().getTeamManager().hasTeamHandlingPaused(p) && !teamName.equals(sorting.getShortTeamName(p))) {
+                    logTeamOverride(teamName, p.getName(), sorting.getShortTeamName(p));
                 } else {
                     newList.add(entry);
                 }
             }
-            nms.setField(packetPlayOutScoreboardTeam, nms.PacketPlayOutScoreboardTeam_PLAYERS, newList);
+            PacketPlayOutScoreboardTeamStorage.PLAYERS.set(packetPlayOutScoreboardTeam, newList);
         }
 
         /**

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitPlaceholderRegistry.java

@@ -1,50 +1,47 @@
 package me.neznamy.tab.platforms.bukkit;
 
-import java.lang.reflect.Field;
-import java.lang.reflect.Method;
-import java.text.NumberFormat;
-import java.util.Locale;
-
 import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.api.placeholder.PlayerPlaceholder;
+import me.neznamy.tab.api.placeholder.PlaceholderManager;
 import me.neznamy.tab.shared.TAB;
-import net.ess3.api.events.NickChangeEvent;
+import me.neznamy.tab.shared.placeholders.UniversalPlaceholderRegistry;
+import net.milkbowl.vault.chat.Chat;
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
-import org.bukkit.event.EventHandler;
-import org.bukkit.event.HandlerList;
-import org.bukkit.event.Listener;
 import org.bukkit.plugin.Plugin;
 import org.bukkit.plugin.RegisteredServiceProvider;
 
-import com.earth2me.essentials.Essentials;
-
-import me.neznamy.tab.api.placeholder.PlaceholderManager;
-import me.neznamy.tab.shared.placeholders.UniversalPlaceholderRegistry;
-import net.milkbowl.vault.chat.Chat;
-import org.bukkit.plugin.java.JavaPlugin;
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.util.UUID;
 
 /**
  * Bukkit registry to register bukkit-only and universal placeholders
  */
 public class BukkitPlaceholderRegistry extends UniversalPlaceholderRegistry {
 
-    /** Number formatter for 2 decimal places */
-    private final NumberFormat numberFormat = NumberFormat.getNumberInstance(Locale.US);
-
-    private final JavaPlugin plugin;
+    /** Vault Chat hook */
     private Chat chat;
-    private final Plugin essentials = Bukkit.getPluginManager().getPlugin(TabConstants.Plugin.ESSENTIALS);
+
+    /** NMS server to get TPS from on spigot */
     private Object server;
+
+    /** TPS field*/
     private Field recentTps;
+
+    /** Detection for presence of Paper's TPS getter */
     private Method paperTps;
+
+    /** Detection for presence of Paper's MSPT getter */
     private Method paperMspt;
+
+    /** Detection for presence of Purpur's AFK getter */
     private Method purpurIsAfk;
 
-    public BukkitPlaceholderRegistry(JavaPlugin plugin) {
-        this.plugin = plugin;
-        numberFormat.setMaximumFractionDigits(2);
+    /**
+     * Constructs new instance and loads hooks
+     */
+    public BukkitPlaceholderRegistry() {
         if (Bukkit.getPluginManager().isPluginEnabled(TabConstants.Plugin.VAULT)) {
             RegisteredServiceProvider<Chat> rspChat = Bukkit.getServicesManager().getRegistration(Chat.class);
             if (rspChat != null) chat = rspChat.getProvider();
@@ -63,7 +60,6 @@ public class BukkitPlaceholderRegistry extends UniversalPlaceholderRegistry {
     @SuppressWarnings("deprecation")
     @Override
     public void registerPlaceholders(PlaceholderManager manager) {
-        super.registerPlaceholders(manager);
         manager.registerPlayerPlaceholder(TabConstants.Placeholder.DISPLAY_NAME, 500, p -> ((Player) p.getPlayer()).getDisplayName());
         if (paperTps != null) {
             manager.registerServerPlaceholder(TabConstants.Placeholder.TPS, 1000, () -> formatTPS(Bukkit.getTPS()[0]));
@@ -79,31 +75,22 @@ public class BukkitPlaceholderRegistry extends UniversalPlaceholderRegistry {
             manager.registerServerPlaceholder(TabConstants.Placeholder.TPS, -1, () -> -1);
         }
         if (paperMspt != null) {
-            manager.registerServerPlaceholder(TabConstants.Placeholder.MSPT, 1000, () -> numberFormat.format(Bukkit.getAverageTickTime()));
+            manager.registerServerPlaceholder(TabConstants.Placeholder.MSPT, 1000, () -> format(Bukkit.getAverageTickTime()));
         }
+        Plugin essentials = Bukkit.getPluginManager().getPlugin(TabConstants.Plugin.ESSENTIALS);
         manager.registerPlayerPlaceholder(TabConstants.Placeholder.AFK, 500, p -> {
-            if (essentials != null && ((Essentials)essentials).getUser(p.getUniqueId()).isAfk()) return true;
+            if (essentials != null) {
+                try {
+                    Object user = essentials.getClass().getMethod("getUser", UUID.class).invoke(essentials, p.getUniqueId());
+                    if ((boolean) user.getClass().getMethod("isAfk").invoke(user)) return true;
+                } catch (ReflectiveOperationException e) {
+                    TAB.getInstance().getErrorManager().printError("Failed to get AFK status of " + p.getName() + " using Essentials", e);
+                }
+            }
             return purpurIsAfk != null && ((Player)p.getPlayer()).isAfk();
         });
-        if (essentials != null) {
-            PlayerPlaceholder nick = manager.registerPlayerPlaceholder(TabConstants.Placeholder.ESSENTIALS_NICK, -1, p -> {
-                String nickname = ((Essentials)essentials).getUser(p.getUniqueId()).getNickname();
-                return nickname == null ? p.getName() : nickname;
-            });
-            Listener nickListener = new Listener() {
-                @EventHandler
-                public void onNickChange(NickChangeEvent e) {
-                    String name = e.getValue() == null ? e.getAffected().getName() : e.getValue();
-                    TabPlayer player = TAB.getInstance().getPlayer(e.getAffected().getUUID());
-                    if (player == null) return;
-                    nick.updateValue(player, name);
-                }
-            };
-            nick.enableTriggerMode(() -> Bukkit.getPluginManager().registerEvents(nickListener, plugin),
-                    () -> HandlerList.unregisterAll(nickListener));
-        } else {
-            manager.registerPlayerPlaceholder(TabConstants.Placeholder.ESSENTIALS_NICK, -1, TabPlayer::getName);
-        }
+        // Removed placeholder, keeping the implementation to avoid placeholder breaking for users on update
+        manager.registerPlayerPlaceholder(TabConstants.Placeholder.ESSENTIALS_NICK, -1, TabPlayer::getName);
 
         if (chat != null) {
             manager.registerPlayerPlaceholder(TabConstants.Placeholder.VAULT_PREFIX, 1000, p -> chat.getPlayerPrefix((Player) p.getPlayer()));
@@ -113,9 +100,6 @@ public class BukkitPlaceholderRegistry extends UniversalPlaceholderRegistry {
             manager.registerServerPlaceholder(TabConstants.Placeholder.VAULT_SUFFIX, -1, () -> "");
         }
         manager.registerPlayerPlaceholder(TabConstants.Placeholder.HEALTH, 100, p -> (int) Math.ceil(((Player) p.getPlayer()).getHealth()));
-    }
-
-    private String formatTPS(double tps) {
-        return numberFormat.format(Math.min(20, tps));
+        super.registerPlaceholders(manager);
     }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitPlatform.java

@@ -1,22 +1,28 @@
 package me.neznamy.tab.platforms.bukkit;
 
-import com.earth2me.essentials.Essentials;
-import com.viaversion.viaversion.api.Via;
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import lombok.Setter;
 import me.clip.placeholderapi.PlaceholderAPI;
+import me.neznamy.tab.api.ProtocolVersion;
+import me.neznamy.tab.api.TabConstants;
+import me.neznamy.tab.api.TabFeature;
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.api.chat.EnumChatFormat;
-import me.neznamy.tab.platforms.bukkit.event.TabLoadEvent;
-import me.neznamy.tab.platforms.bukkit.event.TabPlayerLoadEvent;
+import me.neznamy.tab.api.chat.rgb.RGBUtils;
+import me.neznamy.tab.api.util.ReflectionUtils;
 import me.neznamy.tab.platforms.bukkit.features.BukkitTabExpansion;
 import me.neznamy.tab.platforms.bukkit.features.PerWorldPlayerList;
 import me.neznamy.tab.platforms.bukkit.features.PetFix;
 import me.neznamy.tab.platforms.bukkit.features.WitherBossBar;
 import me.neznamy.tab.platforms.bukkit.features.unlimitedtags.BukkitNameTagX;
+import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
 import me.neznamy.tab.platforms.bukkit.permission.Vault;
-import me.neznamy.tab.shared.Platform;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.api.TabConstants;
+import me.neznamy.tab.shared.backend.BackendPlatform;
 import me.neznamy.tab.shared.features.PlaceholderManagerImpl;
+import me.neznamy.tab.shared.placeholders.expansion.EmptyTabExpansion;
+import me.neznamy.tab.shared.placeholders.expansion.TabExpansion;
 import me.neznamy.tab.shared.features.bossbar.BossBarManagerImpl;
 import me.neznamy.tab.shared.features.nametags.NameTag;
 import me.neznamy.tab.shared.permission.LuckPerms;
@@ -29,35 +35,29 @@ import org.bukkit.entity.Player;
 import org.bukkit.plugin.Plugin;
 import org.bukkit.plugin.RegisteredServiceProvider;
 import org.bukkit.plugin.java.JavaPlugin;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 import java.util.Collection;
 
 /**
  * Implementation of Platform interface for Bukkit platform
  */
-public class BukkitPlatform extends Platform {
+@RequiredArgsConstructor
+public class BukkitPlatform extends BackendPlatform {
+
+    @Getter private final BukkitPacketBuilder packetBuilder = new BukkitPacketBuilder();
+    @Getter private final BukkitPipelineInjector pipelineInjector = NMSStorage.getInstance().getMinorVersion() >= 8 ? new BukkitPipelineInjector() : null;
 
     /** Plugin instance for registering tasks and events */
     private final JavaPlugin plugin;
 
     /** Variables checking presence of other plugins to hook into */
     private final boolean placeholderAPI = Bukkit.getPluginManager().isPluginEnabled(TabConstants.Plugin.PLACEHOLDER_API);
-    private boolean libsDisguises = Bukkit.getPluginManager().isPluginEnabled(TabConstants.Plugin.LIBS_DISGUISES);
-    private final Plugin essentials = Bukkit.getPluginManager().getPlugin(TabConstants.Plugin.ESSENTIALS);
-    private Plugin viaVersion;
+    @Getter @Setter private boolean libsDisguisesEnabled = Bukkit.getPluginManager().isPluginEnabled(TabConstants.Plugin.LIBS_DISGUISES);
+    private final boolean viaVersion = ReflectionUtils.classExists("com.viaversion.viaversion.api.Via");
     private final boolean protocolSupport = Bukkit.getPluginManager().isPluginEnabled(TabConstants.Plugin.PROTOCOL_SUPPORT);
 
-    /**
-     * Constructs new instance with given plugin parameter
-     *
-     * @param   plugin
-     *          plugin instance
-     */
-    public BukkitPlatform(JavaPlugin plugin) {
-        super(new BukkitPacketBuilder());
-        this.plugin = plugin;
-    }
-
     @Override
     public PermissionPlugin detectPermissionPlugin() {
         if (Bukkit.getPluginManager().isPluginEnabled(TabConstants.Plugin.LUCKPERMS)) {
@@ -71,49 +71,8 @@ public class BukkitPlatform extends Platform {
         }
     }
 
-    @Override
-    public void loadFeatures() {
-        if (Bukkit.getPluginManager().isPluginEnabled(TabConstants.Plugin.VIAVERSION)) {
-            try {
-                Class.forName("com.viaversion.viaversion.api.Via");
-                viaVersion = Bukkit.getPluginManager().getPlugin(TabConstants.Plugin.VIAVERSION);
-            } catch (ClassNotFoundException e) {
-                TAB.getInstance().sendConsoleMessage("&cAn outdated version of ViaVersion (" + getPluginVersion(TabConstants.Plugin.VIAVERSION) + ") was detected.", true);
-                TAB.getInstance().sendConsoleMessage("&cTAB only supports ViaVersion 4.0.0 and above. Disabling ViaVersion hook.", true);
-                TAB.getInstance().sendConsoleMessage("&cThis might cause problems, such as limitations still being present for latest MC clients as well as RGB not working.", true);
-            }
-        }
-        TAB tab = TAB.getInstance();
-        if (tab.getConfiguration().isPipelineInjection())
-            tab.getFeatureManager().registerFeature(TabConstants.Feature.PIPELINE_INJECTION, new BukkitPipelineInjector());
-        new BukkitPlaceholderRegistry(plugin).registerPlaceholders(tab.getPlaceholderManager());
-        if (tab.getConfiguration().getConfig().getBoolean("scoreboard-teams.enabled", true)) {
-            if (tab.getConfiguration().getConfig().getBoolean("scoreboard-teams.unlimited-nametag-mode.enabled", false) && tab.getServerVersion().getMinorVersion() >= 8) {
-                tab.getFeatureManager().registerFeature(TabConstants.Feature.UNLIMITED_NAME_TAGS, new BukkitNameTagX(plugin));
-            } else {
-                tab.getFeatureManager().registerFeature(TabConstants.Feature.NAME_TAGS, new NameTag());
-            }
-        }
-        tab.loadUniversalFeatures();
-        if (tab.getConfiguration().getConfig().getBoolean("bossbar.enabled", false)) {
-            if (tab.getServerVersion().getMinorVersion() < 9) {
-                tab.getFeatureManager().registerFeature(TabConstants.Feature.BOSS_BAR, new WitherBossBar(plugin));
-            } else {
-                tab.getFeatureManager().registerFeature(TabConstants.Feature.BOSS_BAR, new BossBarManagerImpl());
-            }
-        }
-        if (tab.getServerVersion().getMinorVersion() >= 9 && tab.getConfiguration().getConfig().getBoolean("fix-pet-names.enabled", false))
-            tab.getFeatureManager().registerFeature(TabConstants.Feature.PET_FIX, new PetFix());
-        if (tab.getConfiguration().getConfig().getBoolean("per-world-playerlist.enabled", false))
-            tab.getFeatureManager().registerFeature(TabConstants.Feature.PER_WORLD_PLAYER_LIST, new PerWorldPlayerList(plugin));
-        if (placeholderAPI && tab.getConfiguration().getConfig().getBoolean("placeholders.register-tab-expansion", true)) {
-            BukkitTabExpansion expansion = new BukkitTabExpansion();
-            expansion.register();
-            TAB.getInstance().getPlaceholderManager().setTabExpansion(expansion);
-        }
-        for (Player p : getOnlinePlayers()) {
-            tab.addPlayer(new BukkitTabPlayer(p, getProtocolVersion(p)));
-        }
+    public BossBarManagerImpl getLegacyBossBar() {
+        return new WitherBossBar(plugin);
     }
 
     @Override
@@ -122,6 +81,43 @@ public class BukkitPlatform extends Platform {
         return pl == null ? null : pl.getDescription().getVersion();
     }
 
+    @Override
+    public void loadPlayers() {
+        for (Player p : getOnlinePlayers()) {
+            TAB.getInstance().addPlayer(new BukkitTabPlayer(p, getProtocolVersion(p)));
+        }
+    }
+
+    @Override
+    public void registerPlaceholders() {
+        new BukkitPlaceholderRegistry().registerPlaceholders(TAB.getInstance().getPlaceholderManager());
+    }
+
+    @Override
+    public NameTag getUnlimitedNametags() {
+        return new BukkitNameTagX(plugin);
+    }
+
+    @Override
+    public @NotNull TabExpansion getTabExpansion() {
+        if (placeholderAPI) {
+            BukkitTabExpansion expansion = new BukkitTabExpansion();
+            expansion.register();
+            return expansion;
+        }
+        return new EmptyTabExpansion();
+    }
+
+    @Override
+    public TabFeature getPetFix() {
+        return new PetFix();
+    }
+
+    @Override
+    public @Nullable TabFeature getPerWorldPlayerlist() {
+        return new PerWorldPlayerList(plugin);
+    }
+
     /**
      * Returns online players from Bukkit API
      *
@@ -182,51 +178,6 @@ public class BukkitPlatform extends Platform {
         }
     }
 
-    @Override
-    public void callLoadEvent() {
-        Bukkit.getPluginManager().callEvent(new TabLoadEvent());
-    }
-
-    @Override
-    public void callLoadEvent(TabPlayer player) {
-        Bukkit.getScheduler().scheduleSyncDelayedTask(plugin, () -> Bukkit.getPluginManager().callEvent(new TabPlayerLoadEvent(player)));
-    }
-
-    /**
-     * Returns status of LibsDisguises plugin presence
-     *
-     * @return  {@code true} if plugin is enabled, {@code false} if not
-     */
-    public boolean isLibsDisguisesEnabled() {
-        return libsDisguises;
-    }
-
-    /**
-     * Sets LibsDisguises presence status to provided value. This is used
-     * to disable LibsDisguises hook in case the plugin is not correctly loaded
-     * for any reason to avoid error spam in the hook.
-     *
-     * @param   enabled
-     *          New status of LibsDisguises presence
-     */
-    public void setLibsDisguisesEnabled(boolean enabled) {
-        libsDisguises = enabled;
-    }
-
-    /**
-     * Returns Essentials' main class if the plugin is installed, {@code null} if not
-     *
-     * @return  Essentials instance or {@code null} if plugin is not installed
-     */
-    public Essentials getEssentials() {
-        return (Essentials) essentials;
-    }
-
-    @Override
-    public String getConfigName() {
-        return "bukkitconfig.yml";
-    }
-
     /**
      * Gets protocol version of requested player and returns it.
      *
@@ -235,13 +186,13 @@ public class BukkitPlatform extends Platform {
      * @return  protocol version of the player
      */
     public int getProtocolVersion(Player player) {
-        if (protocolSupport){
+        if (protocolSupport) {
             int version = getProtocolVersionPS(player);
             //some PS versions return -1 on unsupported server versions instead of throwing exception
             if (version != -1 && version < TAB.getInstance().getServerVersion().getNetworkId()) return version;
         }
-        if (viaVersion != null) {
-            return getProtocolVersionVia(player, 0);
+        if (viaVersion) {
+            return ProtocolVersion.getPlayerVersionVia(player.getUniqueId(), player.getName());
         }
         return TAB.getInstance().getServerVersion().getNetworkId();
     }
@@ -253,7 +204,7 @@ public class BukkitPlatform extends Platform {
      *          Player to get protocol version of
      * @return  protocol version of the player using ProtocolSupport
      */
-    private int getProtocolVersionPS(Player player){
+    private int getProtocolVersionPS(Player player) {
         try {
             Object protocolVersion = Class.forName("protocolsupport.api.ProtocolSupportAPI").getMethod("getProtocolVersion", Player.class).invoke(null, player);
             int version = (int) protocolVersion.getClass().getMethod("getId").invoke(protocolVersion);
@@ -265,39 +216,10 @@ public class BukkitPlatform extends Platform {
         }
     }
 
-    /**
-     * Returns protocol version of requested player using ViaVersion
-     *
-     * @param   player
-     *          Player to get protocol version of
-     * @return  protocol version of the player using ViaVersion
-     */
-    private int getProtocolVersionVia(Player player, int retryLevel){
-        try {
-            if (retryLevel == 10) {
-                TAB.getInstance().debug("Failed to get protocol version of " + player.getName() + " after 10 retries");
-                return TAB.getInstance().getServerVersion().getNetworkId();
-            }
-            int version = Via.getAPI().getPlayerVersion(player.getUniqueId());
-            if (version == -1) {
-                if (!player.isOnline()) return TAB.getInstance().getServerVersion().getNetworkId();
-                Thread.sleep(5);
-                return getProtocolVersionVia(player, retryLevel + 1);
-            }
-            TAB.getInstance().debug("ViaVersion returned protocol version " + version + " for " + player.getName() + " (online=" + player.isOnline() + ")");
-            return version;
-        } catch (InterruptedException e) {
-            Thread.currentThread().interrupt();
-            return -1;
-        } catch (Exception | LinkageError e) {
-            TAB.getInstance().getErrorManager().printError(String.format("Failed to get protocol version of %s using ViaVersion v%s", player.getName(), viaVersion.getDescription().getVersion()), e);
-            return TAB.getInstance().getServerVersion().getNetworkId();
-        }
-    }
-
     /**
      * Sends console message using ConsoleCommandSender, due to
      * Paper not translating colors correctly in Logger messages
+     * and to allow RGB (at least on Paper, doesn't work on spigot)
      *
      * @param   message
      *          Message to send
@@ -306,6 +228,9 @@ public class BukkitPlatform extends Platform {
      */
     @Override
     public void sendConsoleMessage(String message, boolean translateColors) {
-        Bukkit.getConsoleSender().sendMessage("[TAB] " + (translateColors ? EnumChatFormat.color(message) : message));
+        Bukkit.getConsoleSender().sendMessage("[TAB] " + (translateColors ?
+                EnumChatFormat.color(RGBUtils.getInstance().convertToBukkitFormat(message,
+                        TAB.getInstance().getServerVersion().getMinorVersion() >= 16))
+                : message));
     }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitTAB.java

@@ -1,36 +1,36 @@
 package me.neznamy.tab.platforms.bukkit;
 
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-import java.util.logging.Level;
-
+import me.neznamy.tab.api.ProtocolVersion;
 import me.neznamy.tab.api.TabAPI;
-import me.neznamy.tab.platforms.bukkit.nms.*;
+import me.neznamy.tab.api.TabConstants;
+import me.neznamy.tab.api.TabPlayer;
+import me.neznamy.tab.api.chat.EnumChatFormat;
+import me.neznamy.tab.api.util.SupplierWithException;
+import me.neznamy.tab.platforms.bukkit.nms.storage.nms.*;
+import me.neznamy.tab.shared.TAB;
 import org.bstats.bukkit.Metrics;
 import org.bstats.charts.SimplePie;
 import org.bukkit.Bukkit;
 import org.bukkit.command.*;
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.java.JavaPlugin;
-import me.neznamy.tab.api.ProtocolVersion;
-import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.api.chat.EnumChatFormat;
-import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.api.TabConstants;
 import org.jetbrains.annotations.NotNull;
 
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
 /**
  * Main class for Bukkit platform
  */
-public class Main extends JavaPlugin {
+public class BukkitTAB extends JavaPlugin {
 
     @Override
-    public void onEnable(){
+    public void onEnable() {
         String version = Bukkit.getBukkitVersion().split("-")[0];
         String serverPackage = Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3];
         Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("[TAB] Server version: " + version + " (" + serverPackage + ")"));
-        if (!isVersionSupported()){
+        if (!isVersionSupported()) {
             Bukkit.getPluginManager().disablePlugin(this);
             return;
         }
@@ -55,7 +55,7 @@ public class Main extends JavaPlugin {
 
     @Override
     public void onDisable() {
-        //null check due to L34 return making L37 not run
+        //null check due to compatibility check making instance not get set on unsupported versions
         if (TAB.getInstance() != null) TAB.getInstance().unload();
     }
     
@@ -66,43 +66,48 @@ public class Main extends JavaPlugin {
      *
      * @return  {@code true} if server version is compatible, {@code false} if not
      */
-    private boolean isVersionSupported(){
+    private boolean isVersionSupported() {
         List<String> supportedVersions = Arrays.asList(
                 "v1_5_R1", "v1_5_R2", "v1_5_R3", "v1_6_R1", "v1_6_R2", "v1_6_R3",
                 "v1_7_R1", "v1_7_R2", "v1_7_R3", "v1_7_R4", "v1_8_R1", "v1_8_R2", "v1_8_R3",
                 "v1_9_R1", "v1_9_R2", "v1_10_R1", "v1_11_R1", "v1_12_R1", "v1_13_R1", "v1_13_R2",
                 "v1_14_R1", "v1_15_R1", "v1_16_R1", "v1_16_R2", "v1_16_R3", "v1_17_R1", "v1_18_R1",
-                "v1_18_R2", "v1_19_R1");
+                "v1_18_R2", "v1_19_R1", "v1_19_R2", "v1_19_R3");
+        String supportedVersionRange = "1.5 - 1.19.4";
         String serverPackage = Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3];
         try {
             long time = System.currentTimeMillis();
-            int minorVersion = Integer.parseInt(serverPackage.split("_")[1]);
-            if (minorVersion >= 17) {
-                try {
-                    NMSStorage.setInstance(new BukkitModernNMSStorage());
-                } catch (ClassNotFoundException e) {
-                    NMSStorage.setInstance(new MojangModernNMSStorage());
-                }
-            } else {
-                NMSStorage.setInstance(new LegacyNMSStorage());
-            }
+            NMSStorage.setInstance(getNMSLoader());
             if (supportedVersions.contains(serverPackage)) {
                 Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("[TAB] Loaded NMS hook in " + (System.currentTimeMillis()-time) + "ms"));
                 return true;
             } else {
-                Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("&c[TAB] No compatibility issue was found, but this plugin version does not claim to support your server package (" + serverPackage + "). This jar has only been tested on 1.5.x - 1.19. Disabling just to stay safe."));
+                Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("&c[TAB] No compatibility issue was found, but this plugin version does not claim to support your server package (" + serverPackage + "). This jar has only been tested on " + supportedVersionRange + ". Disabling just to stay safe."));
             }
-        } catch (Exception ex) {
+        } catch (IllegalStateException ex) {
             if (supportedVersions.contains(serverPackage)) {
-                Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("&c[TAB] Your server version is marked as compatible, but a compatibility issue was found. Please report the error below (include your server version & fork too)"));
-                getLogger().log(Level.SEVERE, "", ex);
+                Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("&c[TAB] Your server version is marked as compatible, but a compatibility issue was found. Please report this issue (include your server version & fork too)"));
             } else {
-                Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("&c[TAB] Your server version is completely unsupported. This plugin version only supports 1.5.x - 1.19. Disabling."));
+                Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("&c[TAB] Your server version is completely unsupported. This plugin version only supports " + supportedVersionRange + ". Disabling."));
             }
         }
         return false;
     }
 
+    private NMSStorage getNMSLoader() {
+        List<SupplierWithException<NMSStorage>> loaders = new ArrayList<>();
+        loaders.add(BukkitLegacyNMSStorage::new);
+        loaders.add(BukkitModernNMSStorage::new);
+        loaders.add(MojangModernNMSStorage::new);
+        loaders.add(ThermosNMSStorage::new);
+        for (SupplierWithException<NMSStorage> loader : loaders) {
+            try {
+                return loader.get();
+            } catch (Exception ignored) {}
+        }
+        throw new IllegalStateException("Unsupported server version");
+    }
+
     /**
      * Command handler for /tab command
      */

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitTabPlayer.java

@@ -1,11 +1,20 @@
 package me.neznamy.tab.platforms.bukkit;
 
-import java.util.*;
-
+import com.mojang.authlib.GameProfile;
 import com.mojang.authlib.properties.Property;
+import com.viaversion.viaversion.api.Via;
+import com.viaversion.viaversion.api.legacy.bossbar.BossColor;
+import com.viaversion.viaversion.api.legacy.bossbar.BossFlag;
+import com.viaversion.viaversion.api.legacy.bossbar.BossStyle;
+import lombok.Getter;
+import lombok.NonNull;
+import me.neznamy.tab.api.chat.rgb.RGBUtils;
+import me.neznamy.tab.api.protocol.PacketPlayOutBoss;
 import me.neznamy.tab.api.protocol.PacketPlayOutChat;
 import me.neznamy.tab.api.protocol.Skin;
-import me.neznamy.tab.api.util.Preconditions;
+import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
+import me.neznamy.tab.shared.ITabPlayer;
+import me.neznamy.tab.shared.TAB;
 import org.bukkit.Bukkit;
 import org.bukkit.boss.BarColor;
 import org.bukkit.boss.BarFlag;
@@ -16,19 +25,10 @@ import org.bukkit.entity.Player;
 import org.bukkit.metadata.MetadataValue;
 import org.bukkit.potion.PotionEffectType;
 
-import com.earth2me.essentials.Essentials;
-import com.mojang.authlib.GameProfile;
-import com.viaversion.viaversion.api.Via;
-import com.viaversion.viaversion.api.legacy.bossbar.BossColor;
-import com.viaversion.viaversion.api.legacy.bossbar.BossFlag;
-import com.viaversion.viaversion.api.legacy.bossbar.BossStyle;
-
-import io.netty.channel.Channel;
-import me.neznamy.tab.api.chat.rgb.RGBUtils;
-import me.neznamy.tab.api.protocol.PacketPlayOutBoss;
-import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
-import me.neznamy.tab.shared.ITabPlayer;
-import me.neznamy.tab.shared.TAB;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
 
 /**
  * TabPlayer implementation for Bukkit platform
@@ -39,7 +39,7 @@ public class BukkitTabPlayer extends ITabPlayer {
     private Object handle;
 
     /** Player's connection for sending packets, preloading for speed */
-    private Object playerConnection;
+    @Getter private Object playerConnection;
     
     /** Bukkit BossBars the player can currently see */
     private final Map<UUID, BossBar> bossBars = new HashMap<>();
@@ -55,8 +55,8 @@ public class BukkitTabPlayer extends ITabPlayer {
      * @param   protocolVersion
      *          Player's protocol network id
      */
-    public BukkitTabPlayer(Player p, int protocolVersion){
-        super(p, p.getUniqueId(), p.getName(), "N/A", p.getWorld().getName(), protocolVersion, true);
+    public BukkitTabPlayer(Player p, int protocolVersion) {
+        super(p, p.getUniqueId(), p.getName(), TAB.getInstance().getConfiguration().getServerName(), p.getWorld().getName(), protocolVersion, true);
         try {
             handle = NMSStorage.getInstance().getHandle.invoke(player);
             playerConnection = NMSStorage.getInstance().PLAYER_CONNECTION.get(handle);
@@ -66,8 +66,7 @@ public class BukkitTabPlayer extends ITabPlayer {
     }
 
     @Override
-    public boolean hasPermission(String permission) {
-        Preconditions.checkNotNull(permission, "permission");
+    public boolean hasPermission(@NonNull String permission) {
         long time = System.nanoTime();
         boolean value = getPlayer().hasPermission(permission);
         TAB.getInstance().getCPUManager().addMethodTime("hasPermission", System.nanoTime()-time);
@@ -277,10 +276,7 @@ public class BukkitTabPlayer extends ITabPlayer {
 
     @Override
     public boolean isVanished() {
-        Essentials essentials = ((BukkitPlatform)TAB.getInstance().getPlatform()).getEssentials();
-        if (essentials != null && essentials.getUser(getUniqueId()).isVanished()) return true;
-        List<MetadataValue> metadata = getPlayer().getMetadata("vanished");
-        return !metadata.isEmpty() && metadata.get(0).asBoolean();
+        return getPlayer().getMetadata("vanished").stream().anyMatch(MetadataValue::asBoolean);
     }
 
     @SuppressWarnings("deprecation")
@@ -288,28 +284,4 @@ public class BukkitTabPlayer extends ITabPlayer {
     public int getGamemode() {
         return getPlayer().getGameMode().getValue();
     }
-
-    @Override
-    public Object getProfilePublicKey() {
-        if (NMSStorage.getInstance().getMinorVersion() < 19) return null;
-        try {
-            Object key = NMSStorage.getInstance().EntityHuman_ProfilePublicKey.get(handle);
-            if (key == null) return null;
-            return NMSStorage.getInstance().ProfilePublicKey_getRecord.invoke(key);
-        } catch (ReflectiveOperationException e) {
-            TAB.getInstance().getErrorManager().printError("Failed to get profile key of " + getName(), e);
-            return null;
-        }
-    }
-
-    @Override
-    public Channel getChannel() {
-        try {
-            if (NMSStorage.getInstance().CHANNEL != null)
-                return (Channel) NMSStorage.getInstance().CHANNEL.get(NMSStorage.getInstance().NETWORK_MANAGER.get(playerConnection));
-        } catch (IllegalAccessException e) {
-            TAB.getInstance().getErrorManager().printError("Failed to get channel of " + getName(), e);
-        }
-        return null;
-    }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/event/TabLoadEvent.java

@@ -1,25 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.event;
-
-import org.bukkit.event.Event;
-import org.bukkit.event.HandlerList;
-
-/**
- * Bukkit event that is called each time TAB fully loads. This includes server startup, reload,
- * /tab reload and /plugman reload tab
- *
- * @deprecated for removal, use {@link me.neznamy.tab.api.event.plugin.TabLoadEvent}
- */
-@Deprecated
-public class TabLoadEvent extends Event {
-
-    private static final HandlerList handlers = new HandlerList();
-
-    @Override
-    public HandlerList getHandlers(){
-        return getHandlerList();
-    }
-    
-    public static HandlerList getHandlerList() {
-        return handlers;
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/event/TabPlayerLoadEvent.java

@@ -1,36 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.event;
-
-import org.bukkit.event.Event;
-import org.bukkit.event.HandlerList;
-
-import me.neznamy.tab.api.TabPlayer;
-
-/**
- * Bukkit event that is called when player is successfully loaded after joining. This also includes plugin reloading.
- *
- * @deprecated for removal, use {@link me.neznamy.tab.api.event.player.PlayerLoadEvent}
- */
-@Deprecated
-public class TabPlayerLoadEvent extends Event {
-
-    private static final HandlerList handlers = new HandlerList();
-
-    private final TabPlayer player;
-
-    public TabPlayerLoadEvent(TabPlayer player) {
-        this.player = player;
-    }
-
-    @Override
-    public HandlerList getHandlers(){
-        return getHandlerList();
-    }
-
-    public static HandlerList getHandlerList() {
-        return handlers;
-    }
-
-    public TabPlayer getPlayer() {
-        return player;
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/BukkitTabExpansion.java

@@ -1,12 +1,14 @@
 package me.neznamy.tab.platforms.bukkit.features;
 
+import lombok.Getter;
 import me.clip.placeholderapi.PlaceholderAPI;
 import me.clip.placeholderapi.expansion.PlaceholderExpansion;
 import me.neznamy.tab.api.TabAPI;
 import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.api.TabFeature;
 import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.shared.features.TabExpansion;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.placeholders.expansion.TabExpansion;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 
@@ -19,47 +21,40 @@ import java.util.WeakHashMap;
  */
 public class BukkitTabExpansion extends PlaceholderExpansion implements TabExpansion {
 
-    /** Map holding all placeholder values for all players */
-    private final Map<TabPlayer, Map<String, String>> values = new WeakHashMap<>();
+    /** Map holding all values for all players for easy and high-performance access */
+    private final WeakHashMap<Player, Map<String, String>> values = new WeakHashMap<>();
+
+    @Getter private final String author = TabConstants.PLUGIN_AUTHOR;
+    @Getter private final String identifier = TabConstants.PLUGIN_ID;
+    @Getter private final String version = TabConstants.PLUGIN_VERSION;
 
     @Override
-    public boolean persist(){
+    public boolean persist() {
         return true;
     }
 
     @Override
-    public @NotNull String getAuthor(){
-        return "NEZNAMY";
-    }
-
-    @Override
-    public @NotNull String getIdentifier(){
-        return "tab";
-    }
-
-    @Override
-    public @NotNull String getVersion() {
-        return TabConstants.PLUGIN_VERSION;
-    }
-
-    @Override
-    public String onPlaceholderRequest(Player player, @NotNull String identifier){
+    public String onPlaceholderRequest(Player player, @NotNull String identifier) {
         if (identifier.startsWith("replace_")) {
-            String placeholder = "%" + identifier.substring(8) + "%";
-            String output = PlaceholderAPI.setPlaceholders(player, placeholder);
-            return TabAPI.getInstance().getPlaceholderManager().findReplacement(placeholder, output);
+            String text = "%" + identifier.substring(8) + "%";
+            String textBefore;
+            do {
+                textBefore = text;
+                for (String placeholder : TAB.getInstance().getPlaceholderManager().detectPlaceholders(text)) {
+                    text = text.replace(placeholder, TabAPI.getInstance().getPlaceholderManager().findReplacement(placeholder,
+                            PlaceholderAPI.setPlaceholders(player, placeholder)));
+                }
+            } while (!textBefore.equals(text));
+            return text;
         }
         if (identifier.startsWith("placeholder_")) {
             TabAPI.getInstance().getPlaceholderManager().addUsedPlaceholder("%" + identifier.substring(12) + "%", (TabFeature) TabAPI.getInstance().getPlaceholderManager());
         }
-        if (player == null) return "<Player cannot be null>";
-        TabPlayer p = TabAPI.getInstance().getPlayer(player.getUniqueId());
-        if (p == null || !p.isLoaded()) return "<Player is not loaded>";
-        return values.get(p).get(identifier);
+        return values.get(player).get(identifier);
     }
 
     @Override
     public void setValue(TabPlayer player, String key, String value) {
-        values.computeIfAbsent(player, p -> new HashMap<>()).put(key, value);
+        values.computeIfAbsent((Player) player.getPlayer(), p -> new HashMap<>()).put(key, value);
     }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/PerWorldPlayerList.java

@@ -5,6 +5,8 @@ import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
 import me.neznamy.tab.api.TabAPI;
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
@@ -23,36 +25,27 @@ import me.neznamy.tab.shared.TAB;
  * Per-world-PlayerList feature handler
  */
 @SuppressWarnings("deprecation")
+@RequiredArgsConstructor
 public class PerWorldPlayerList extends TabFeature implements Listener {
 
-    //plugin instance
-    private final JavaPlugin plugin;
-
-    //config options
+    /** Config options */
     private final boolean allowBypass = TabAPI.getInstance().getConfig().getBoolean("per-world-playerlist.allow-bypass-permission", false);
     private final List<String> ignoredWorlds = TabAPI.getInstance().getConfig().getStringList("per-world-playerlist.ignore-effect-in-worlds", Arrays.asList("ignoredworld", "build"));
     private final Map<String, List<String>> sharedWorlds = TabAPI.getInstance().getConfig().getConfigurationSection("per-world-playerlist.shared-playerlist-world-groups");
 
-    /**
-     * Constructs new instance with given parameters and loads config options
-     *
-     * @param   plugin
-     *          plugin instance
-     */
-    public PerWorldPlayerList(JavaPlugin plugin) {
-        super("Per world PlayerList", null);
-        this.plugin = plugin;
-        TabAPI.getInstance().debug(String.format("Loaded PerWorldPlayerList feature with parameters allowBypass=%s, ignoredWorlds=%s, sharedWorlds=%s", allowBypass, ignoredWorlds, sharedWorlds));
+    /** Plugin reference*/
+    private final JavaPlugin plugin;
+
+    @Getter private final String featureName = "Per world PlayerList";
+
+    @Override
+    public void load() {
+        Bukkit.getOnlinePlayers().forEach(this::checkPlayer);
         Bukkit.getPluginManager().registerEvents(this, plugin);
     }
 
     @Override
-    public void load(){
-        Bukkit.getScheduler().runTask(plugin, () -> Bukkit.getOnlinePlayers().forEach(this::checkPlayer));
-    }
-
-    @Override
-    public void unload(){
+    public void unload() {
         for (Player p : Bukkit.getOnlinePlayers()) {
             for (Player pl : Bukkit.getOnlinePlayers()) {
                 p.showPlayer(pl);
@@ -75,8 +68,16 @@ public class PerWorldPlayerList extends TabFeature implements Listener {
         TAB.getInstance().getCPUManager().addTime(getFeatureName(), TabConstants.CpuUsageCategory.WORLD_SWITCH, System.nanoTime()-time);
     }
 
+    /**
+     * Performs visibility check on the player. Shows players this player should see and does not,
+     * hides players the player should not see, shows the player to those who should see player and hides
+     * from those, who should not see.
+     *
+     * @param   p
+     *          Player to update
+     */
     private void checkPlayer(Player p) {
-        for (Player all : Bukkit.getOnlinePlayers()){
+        for (Player all : Bukkit.getOnlinePlayers()) {
             if (all == p) continue;
             if (!shouldSee(p, all) && p.canSee(all)) p.hidePlayer(all);
             if (shouldSee(p, all) && !p.canSee(all)) p.showPlayer(all);
@@ -85,6 +86,14 @@ public class PerWorldPlayerList extends TabFeature implements Listener {
         }
     }
 
+    /**
+     * Returns {@code true} if viewer should see target player, {@code false} if not.
+     * @param   viewer
+     *          Player viewing the TabList
+     * @param   target
+     *          Target displayed in the TabList
+     * @return  {@code true} if viewer should see target, {@code false} if not.
+     */
     private boolean shouldSee(Player viewer, Player target) {
         if (target == viewer) return true;
         if ((allowBypass && viewer.hasPermission(TabConstants.Permission.PER_WORLD_PLAYERLIST_BYPASS)) || ignoredWorlds.contains(viewer.getWorld().getName())) return true;

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/PetFix.java

@@ -1,11 +1,14 @@
 package me.neznamy.tab.platforms.bukkit.features;
 
-import me.neznamy.tab.api.TabAPI;
+import lombok.Getter;
 import me.neznamy.tab.api.TabFeature;
 import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutEntityMetadataStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutSpawnEntityLivingStorage;
 import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
 import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherItem;
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherObject;
+import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
 
 import java.util.ConcurrentModificationException;
 import java.util.List;
@@ -22,13 +25,13 @@ import java.util.WeakHashMap;
  */
 public class PetFix extends TabFeature {
 
-    //nms storage
+    /** NMS Storage reference for quick access */
     private final NMSStorage nms = NMSStorage.getInstance();
 
-    //DataWatcher position of pet owner field
+    /** DataWatcher position of pet owner field */
     private final int petOwnerPosition = getPetOwnerPosition();
 
-    //logger of last interacts to prevent feature not working on 1.16
+    /** Logger of last interacts to prevent feature not working on 1.16 */
     private final WeakHashMap<TabPlayer, Long> lastInteractFix = new WeakHashMap<>();
 
     /**
@@ -43,13 +46,7 @@ public class PetFix extends TabFeature {
      */
     private static final int INTERACT_COOLDOWN = 160;
 
-    /**
-     * Constructs new instance with given parameter
-     */
-    public PetFix() {
-        super("Pet name fix", null);
-        TabAPI.getInstance().debug("Loaded PetFix feature");
-    }
+    @Getter private final String featureName = "Pet name fix";
 
     /**
      * Returns position of pet owner field based on server version
@@ -94,6 +91,13 @@ public class PetFix extends TabFeature {
         return false;
     }
 
+    /**
+     * Checks if the provided entity use action is INTERACT or not.
+     *
+     * @param   action
+     *          Action to check
+     * @return {@code true} if action is INTERACT, {@code false} if not.
+     */
     private boolean isInteract(Object action) {
         if (nms.getMinorVersion() >= 17) {
             return nms.PacketPlayInUseEntity$d.isInstance(action);
@@ -111,32 +115,40 @@ public class PetFix extends TabFeature {
     @SuppressWarnings("unchecked")
     @Override
     public void onPacketSend(TabPlayer receiver, Object packet) throws ReflectiveOperationException {
-        if (nms.PacketPlayOutEntityMetadata.isInstance(packet)) {
+        if (PacketPlayOutEntityMetadataStorage.CLASS.isInstance(packet)) {
             Object removedEntry = null;
-            List<Object> items = (List<Object>) nms.PacketPlayOutEntityMetadata_LIST.get(packet);
+            List<Object> items = (List<Object>) PacketPlayOutEntityMetadataStorage.LIST.get(packet);
             if (items == null) return;
             try {
                 for (Object item : items) {
                     if (item == null) continue;
-                    if (nms.DataWatcherObject_SLOT.getInt(nms.DataWatcherItem_TYPE.get(item)) == petOwnerPosition) {
-                        Object value = nms.DataWatcherItem_VALUE.get(item);
+                    int slot;
+                    Object value;
+                    if (nms.is1_19_3Plus()) {
+                        slot = DataWatcher.DataValue_POSITION.getInt(item);
+                        value = DataWatcher.DataValue_VALUE.get(item);
+                    } else {
+                        slot = DataWatcherObject.SLOT.getInt(DataWatcherItem.TYPE.get(item));
+                        value = DataWatcherItem.VALUE.get(item);
+                    }
+                    if (slot == petOwnerPosition) {
                         if (value instanceof Optional || value instanceof com.google.common.base.Optional) {
                             removedEntry = item;
                         }
                     }
                 }
+                if (removedEntry != null) items.remove(removedEntry);
             } catch (ConcurrentModificationException e) {
                 //no idea how can this list change in another thread since it's created for the packet but whatever, try again
                 onPacketSend(receiver, packet);
             }
-            if (removedEntry != null) items.remove(removedEntry);
-        } else if (nms.PacketPlayOutSpawnEntityLiving.isInstance(packet) && nms.PacketPlayOutSpawnEntityLiving_DATAWATCHER != null) {
+        } else if (PacketPlayOutSpawnEntityLivingStorage.CLASS.isInstance(packet) && PacketPlayOutSpawnEntityLivingStorage.DATA_WATCHER != null) {
             //<1.15
-            DataWatcher watcher = DataWatcher.fromNMS(nms.PacketPlayOutSpawnEntityLiving_DATAWATCHER.get(packet));
+            DataWatcher watcher = DataWatcher.fromNMS(PacketPlayOutSpawnEntityLivingStorage.DATA_WATCHER.get(packet));
             DataWatcherItem petOwner = watcher.getItem(petOwnerPosition);
             if (petOwner != null && (petOwner.getValue() instanceof Optional || petOwner.getValue() instanceof com.google.common.base.Optional)) {
                 watcher.removeValue(petOwnerPosition);
-                nms.setField(packet, nms.PacketPlayOutSpawnEntityLiving_DATAWATCHER, watcher.toNMS());
+                PacketPlayOutSpawnEntityLivingStorage.DATA_WATCHER.set(packet, watcher.build());
             }
         }
     }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/WitherBossBar.java

@@ -1,5 +1,12 @@
 package me.neznamy.tab.platforms.bukkit.features;
 
+import lombok.RequiredArgsConstructor;
+import me.neznamy.tab.api.TabConstants;
+import me.neznamy.tab.api.TabPlayer;
+import me.neznamy.tab.api.bossbar.BossBar;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.backend.protocol.PacketPlayOutEntityTeleport;
+import me.neznamy.tab.shared.features.bossbar.BossBarManagerImpl;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
 import org.bukkit.entity.Player;
@@ -9,41 +16,32 @@ import org.bukkit.event.Listener;
 import org.bukkit.event.player.PlayerRespawnEvent;
 import org.bukkit.plugin.java.JavaPlugin;
 
-import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.api.bossbar.BossBar;
-import me.neznamy.tab.platforms.bukkit.nms.PacketPlayOutEntityTeleport;
-import me.neznamy.tab.api.TabConstants;
-import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.features.bossbar.BossBarManagerImpl;
-
 /**
  * An additional class with additional code for <1.9 servers due to an entity being required
  */
+@RequiredArgsConstructor
 public class WitherBossBar extends BossBarManagerImpl implements Listener {
 
-    //distance of wither in blocks
+    /** Distance of the Wither in blocks */
     private static final int WITHER_DISTANCE = 60;
-    
-    /**
-     * Constructs a new instance of the class
-     *
-     * @param   plugin
-     *          plugin instance
-     */
-    public WitherBossBar(JavaPlugin plugin) {
+
+    /** Reference to plugin for registering listener */
+    private final JavaPlugin plugin;
+
+    @Override
+    public void load() {
         Bukkit.getPluginManager().registerEvents(this, plugin);
         //when MC is on fullscreen, BossBar disappears after 1 second of not being seen
         //when in a small window, it's about 100ms
         TAB.getInstance().getCPUManager().startRepeatingMeasuredTask(100,
                 this, TabConstants.CpuUsageCategory.TELEPORTING_WITHER, this::teleport);
-    }
-    
-    @Override
-    public void load() {
         super.load();
         teleport();
     }
 
+    /**
+     * Updates Wither's location for all online players
+     */
     private void teleport() {
         for (TabPlayer p : TAB.getInstance().getOnlinePlayers()) {
             if (p.getVersion().getMinorVersion() > 8) continue; //sending VV packets to those
@@ -51,7 +49,7 @@ public class WitherBossBar extends BossBarManagerImpl implements Listener {
                 if (!line.containsPlayer(p)) continue;
                 Location loc = ((Player) p.getPlayer()).getEyeLocation().add(((Player) p.getPlayer()).getEyeLocation().getDirection().normalize().multiply(WITHER_DISTANCE));
                 if (loc.getY() < 1) loc.setY(1);
-                p.sendCustomPacket(new PacketPlayOutEntityTeleport(line.getUniqueId().hashCode(), loc), TabConstants.PacketCategory.BOSSBAR_WITHER_TELEPORT);
+                p.sendCustomPacket(new PacketPlayOutEntityTeleport(line.getUniqueId().hashCode(), loc.getX(), loc.getY(), loc.getZ(), 0, 0), TabConstants.PacketCategory.BOSSBAR_WITHER_TELEPORT);
             }
         }
     }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/unlimitedtags/BukkitArmorStand.java

@@ -1,348 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.features.unlimitedtags;
-
-import me.neznamy.tab.api.*;
-import me.neznamy.tab.api.chat.EnumChatFormat;
-import me.neznamy.tab.api.chat.IChatBaseComponent;
-import me.neznamy.tab.api.protocol.TabPacket;
-import me.neznamy.tab.platforms.bukkit.nms.PacketPlayOutEntityDestroy;
-import me.neznamy.tab.platforms.bukkit.nms.PacketPlayOutEntityMetadata;
-import me.neznamy.tab.platforms.bukkit.nms.PacketPlayOutEntityTeleport;
-import me.neznamy.tab.platforms.bukkit.nms.PacketPlayOutSpawnEntityLiving;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
-import org.bukkit.Location;
-import org.bukkit.entity.Entity;
-import org.bukkit.entity.EntityType;
-import org.bukkit.entity.Player;
-import org.bukkit.entity.Pose;
-
-import java.util.UUID;
-
-/**
- * A class representing an armor stand attached to a player (if the feature is enabled)
- */
-public class BukkitArmorStand implements ArmorStand {
-
-    //entity id counter to pick unique entity IDs
-    private static int idCounter = 2000000000;
-
-    //NameTag feature
-    private final BukkitNameTagX manager = (BukkitNameTagX) TabAPI.getInstance().getFeatureManager().getFeature(TabConstants.Feature.UNLIMITED_NAME_TAGS);
-
-    private final BukkitArmorStandManager asm;
-    
-    //owner of the armor stand
-    private final TabPlayer owner;
-
-    //instance of Bukkit player
-    private final Player player;
-
-    //offset in blocks, 0 for original height
-    private double yOffset;
-
-    //entity ID of this armor stand
-    private final int entityId = idCounter++;
-
-    //unique ID of this armor stand
-    private final UUID uuid = UUID.randomUUID();
-
-    //sneaking flag of armor stands
-    private boolean sneaking;
-
-    //armor stand visibility
-    private boolean visible;
-
-    //property dedicated to this armor stand
-    private final Property property;
-
-    //if offset is static or dynamic based on other armor stands
-    private final boolean staticOffset;
-
-    //entity destroy packet
-    private final PacketPlayOutEntityDestroy destroyPacket = new PacketPlayOutEntityDestroy(entityId);
-
-    public BukkitArmorStand(BukkitArmorStandManager asm, TabPlayer owner, String propertyName, double yOffset, boolean staticOffset) {
-        this.asm = asm;
-        this.owner = owner;
-        this.staticOffset = staticOffset;
-        player = (Player) owner.getPlayer();
-        this.yOffset = yOffset;
-        this.property = owner.getProperty(propertyName);
-        visible = getVisibility();
-        sneaking = player.isSneaking();
-    }
-
-    @Override
-    public void refresh() {
-        visible = getVisibility();
-        updateMetadata();
-    }
-
-    @Override
-    public Property getProperty() {
-        return property;
-    }
-
-    @Override
-    public boolean hasStaticOffset() {
-        return staticOffset;
-    }
-
-    @Override
-    public double getOffset() {
-        return yOffset;
-    }
-
-    @Override
-    public void setOffset(double offset) {
-        if (yOffset == offset) return;
-        yOffset = offset;
-        for (TabPlayer all : asm.getNearbyPlayers()) {
-            all.sendCustomPacket(getTeleportPacket(all), TabConstants.PacketCategory.UNLIMITED_NAMETAGS_OFFSET_CHANGE);
-        }
-    }
-
-    @Override
-    public void spawn(TabPlayer viewer) {
-        for (TabPacket packet : getSpawnPackets(viewer)) {
-            viewer.sendCustomPacket(packet, TabConstants.PacketCategory.UNLIMITED_NAMETAGS_SPAWN);
-        }
-    }
-
-    @Override
-    public void destroy() {
-        for (TabPlayer all : asm.getNearbyPlayers()) all.sendCustomPacket(destroyPacket, TabConstants.PacketCategory.UNLIMITED_NAMETAGS_DESPAWN);
-    }
-    
-    @Override
-    public void destroy(TabPlayer viewer) {
-        viewer.sendCustomPacket(destroyPacket, TabConstants.PacketCategory.UNLIMITED_NAMETAGS_DESPAWN);
-    }
-
-    @Override
-    public void teleport() {
-        for (TabPlayer all : asm.getNearbyPlayers()) {
-            all.sendCustomPacket(getTeleportPacket(all), TabConstants.PacketCategory.UNLIMITED_NAMETAGS_TELEPORT);
-        }
-    }
-
-    @Override
-    public void teleport(TabPlayer viewer) {
-        if (!asm.isNearby(viewer) && viewer != owner) {
-            asm.spawn(viewer);
-        } else {
-            viewer.sendCustomPacket(getTeleportPacket(viewer), TabConstants.PacketCategory.UNLIMITED_NAMETAGS_TELEPORT);
-        }
-    }
-
-    @Override
-    public void sneak(boolean sneaking) {
-        if (this.sneaking == sneaking) return; //idk
-        this.sneaking = sneaking;
-        for (TabPlayer viewer : asm.getNearbyPlayers()) {
-            if (viewer.getVersion().getMinorVersion() == 14 && !manager.isArmorStandsAlwaysVisible()) {
-                //1.14.x client sided bug, de-spawning completely
-                if (sneaking) {
-                    viewer.sendCustomPacket(destroyPacket, TabConstants.PacketCategory.UNLIMITED_NAMETAGS_SNEAK);
-                } else {
-                    spawn(viewer);
-                }
-            } else {
-                //respawning so there's no animation and it's instant
-                respawn(viewer);
-            }
-        }
-    }
-
-    @Override
-    public void updateVisibility(boolean force) {
-        boolean visibility = getVisibility();
-        if (visible != visibility || force) {
-            refresh();
-        }
-    }
-
-    @Override
-    public int getEntityId() {
-        return entityId;
-    }
-
-    /**
-     * Returns teleport packet for specified viewer
-     *
-     * @param   viewer
-     *          player to get location for
-     * @return  teleport packet
-     */
-    public PacketPlayOutEntityTeleport getTeleportPacket(TabPlayer viewer) {
-        return new PacketPlayOutEntityTeleport(entityId, getArmorStandLocationFor(viewer));
-    }
-
-    /**
-     * Updates armor stand's metadata
-     */
-    public void updateMetadata() {
-        for (TabPlayer viewer : asm.getNearbyPlayers()) {
-            viewer.sendCustomPacket(new PacketPlayOutEntityMetadata(entityId, createDataWatcher(property.getFormat(viewer), viewer)), TabConstants.PacketCategory.UNLIMITED_NAMETAGS_METADATA);
-        }
-    }
-
-    /**
-     * Returns general visibility rule for everyone with limited info
-     *
-     * @return  true if armor stand should be visible, false if not
-     */
-    public boolean getVisibility() {
-        if (manager.isArmorStandsAlwaysVisible()) return true;
-        if (owner.isDisguised() || manager.getVehicleManager().isOnBoat(owner)) return false;
-        return !owner.hasInvisibilityPotion() && owner.getGamemode() != 3 && !manager.hasHiddenNametag(owner) && property.get().length() > 0;
-    }
-
-    /**
-     * Returns general location where armor stand should be at time of calling
-     *
-     * @param   viewer
-     *          Player looking at the armor stand
-     * @return  Location where armor stand should be for everyone
-     */
-    public Location getLocation(TabPlayer viewer) {
-        double x = player.getLocation().getX();
-        double y = getY() + yOffset;
-        double z = player.getLocation().getZ();
-        if (!player.isSleeping()) {
-            if (sneaking) {
-                if (viewer.getVersion().getMinorVersion() >= 15) {
-                    y += 1.37;
-                } else if (viewer.getVersion().getMinorVersion() >= 9) {
-                    y += 1.52;
-                } else {
-                    y += 1.7;
-                }
-            } else {
-                y += viewer.getVersion().getMinorVersion() >= 9 ? 1.8 : 1.84; // Normal
-            }
-        } else {
-            y += viewer.getVersion().getMinorVersion() >= 9 ? 0.2 : 0.26; // Sleeping
-        }
-        return new Location(null,x,y,z);
-    }
-
-    /**
-     * Returns Y where player is based on player's vehicle due to bukkit API bug
-     *
-     * @return  correct player's Y
-     */
-    protected double getY() {
-        //1.14+ server sided bug
-        Entity vehicle = player.getVehicle();
-        if (vehicle != null) {
-            if (vehicle.getType().toString().contains("HORSE")) { //covering all 3 horse types
-                return vehicle.getLocation().getY() + 0.85;
-            }
-            if (vehicle.getType().toString().equals("DONKEY")) { //1.11+
-                return vehicle.getLocation().getY() + 0.525;
-            }
-            if (vehicle.getType() == EntityType.PIG) {
-                return vehicle.getLocation().getY() + 0.325;
-            }
-            if (vehicle.getType().toString().equals("STRIDER")) { //1.16+
-                return vehicle.getLocation().getY() + 1.15;
-            }
-        }
-        //1.13+ swimming or 1.9+ flying with elytra
-        if (isSwimming() || (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 9 && player.isGliding())) {
-            return player.getLocation().getY()-1.22;
-        }
-        return player.getLocation().getY();
-    }
-
-    private boolean isSwimming() {
-        if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 14 && player.getPose() == Pose.SWIMMING) return true;
-        return TabAPI.getInstance().getServerVersion().getMinorVersion() == 13 && player.isSwimming();
-    }
-
-    /**
-     * Creates data watcher with specified display name for viewer
-     *
-     * @param   displayName
-     *          armor stand name
-     * @param   viewer
-     *          player to apply checks against
-     * @return  DataWatcher for viewer
-     */
-    public DataWatcher createDataWatcher(String displayName, TabPlayer viewer) {
-        DataWatcher datawatcher = new DataWatcher();
-
-        byte flag = 32; //invisible
-        if (sneaking) flag += (byte)2;
-        datawatcher.helper().setEntityFlags(flag);
-        datawatcher.helper().setCustomName(displayName, viewer.getVersion());
-
-        boolean visibility;
-        if (isNameVisiblyEmpty(displayName) || !((Player) viewer.getPlayer()).canSee(player) ||
-                manager.hasHiddenNametag(owner, viewer) || manager.hasHiddenNameTagVisibilityView(viewer)) {
-            visibility = false;
-        } else {
-            visibility = visible;
-        }
-        datawatcher.helper().setCustomNameVisible(visibility);
-
-        if (viewer.getVersion().getMinorVersion() > 8 || manager.isMarkerFor18x()) datawatcher.helper().setArmorStandFlags((byte)16);
-        return datawatcher;
-    }
-
-    /**
-     * Returns true if display name is in fact empty, for example only containing color codes
-     *
-     * @param   displayName
-     *          string to check
-     * @return  true if it's empty, false if not
-     */
-    private boolean isNameVisiblyEmpty(String displayName) {
-        if (displayName.length() == 0) return true;
-        if (!displayName.startsWith(EnumChatFormat.COLOR_STRING) && !displayName.startsWith("&") && !displayName.startsWith("#")) return false;
-        String text = IChatBaseComponent.fromColoredText(displayName).toRawText();
-        if (text.contains(" ")) text = text.replace(" ", "");
-        return text.length() == 0;
-    }
-
-    /**
-     * Returns list of packets to send to make armor stand spawn with metadata
-     *
-     * @param   viewer
-     *          viewer to apply relational placeholders for
-     * @return  List of packets that spawn the armor stand
-     */
-    public TabPacket[] getSpawnPackets(TabPlayer viewer) {
-        visible = getVisibility();
-        DataWatcher dataWatcher = createDataWatcher(property.getFormat(viewer), viewer);
-        if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 15) {
-            return new TabPacket[] {
-                    new PacketPlayOutSpawnEntityLiving(entityId, uuid, EntityType.ARMOR_STAND, getArmorStandLocationFor(viewer), null),
-                    new PacketPlayOutEntityMetadata(entityId, dataWatcher)
-            };
-        } else {
-            return new TabPacket[] {
-                    new PacketPlayOutSpawnEntityLiving(entityId, uuid, EntityType.ARMOR_STAND, getArmorStandLocationFor(viewer), dataWatcher),
-            };
-        }
-    }
-
-    /**
-     * Returns location where armor stand should be for specified viewer
-     *
-     * @param   viewer
-     *          player to get location for
-     * @return  location of armor stand
-     */
-    public Location getArmorStandLocationFor(TabPlayer viewer) {
-        return viewer.getVersion().getMinorVersion() == 8 && !manager.isMarkerFor18x() ? getLocation(viewer).add(0,-2,0) : getLocation(viewer);
-    }
-
-    @Override
-    public void respawn(TabPlayer viewer) {
-        viewer.sendCustomPacket(destroyPacket, TabConstants.PacketCategory.UNLIMITED_NAMETAGS_DESPAWN);
-        // 1.8.0 will not see entity that respawned in the same tick
-        // creating new delayed task every time someone sneaks can be abused and cause OOM
-        spawn(viewer);
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/unlimitedtags/BukkitArmorStandManager.java

@@ -1,202 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.features.unlimitedtags;
-
-import me.neznamy.tab.api.ArmorStand;
-import me.neznamy.tab.api.ArmorStandManager;
-import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.api.TabConstants;
-import me.neznamy.tab.shared.features.nametags.unlimited.NameTagX;
-
-import java.util.ArrayList;
-import java.util.LinkedHashMap;
-import java.util.List;
-import java.util.Map;
-
-/**
- * A helper class for easy management of armor stands of a player
- */
-public class BukkitArmorStandManager implements ArmorStandManager {
-
-    //map of registered armor stands
-    private final Map<String, ArmorStand> armorStands = new LinkedHashMap<>();
-
-    //players in entity tracking range
-    private final List<TabPlayer> nearbyPlayers = new ArrayList<>();
-
-    //array to iterate over to avoid concurrent modification and slightly boost performance & memory
-    private ArmorStand[] armorStandArray = new ArmorStand[0];
-
-    private TabPlayer[] nearbyPlayerArray = new TabPlayer[0];
-
-    public BukkitArmorStandManager(NameTagX nameTagX, TabPlayer owner) {
-        owner.setProperty(nameTagX, TabConstants.Property.NAMETAG, owner.getProperty(TabConstants.Property.TAGPREFIX).getCurrentRawValue()
-                + owner.getProperty(TabConstants.Property.CUSTOMTAGNAME).getCurrentRawValue()
-                + owner.getProperty(TabConstants.Property.TAGSUFFIX).getCurrentRawValue());
-        double height = 0;
-        for (String line : nameTagX.getDynamicLines()) {
-            addArmorStand(line, new BukkitArmorStand(this, owner, line, height, false));
-            height += 0.26;
-        }
-        for (Map.Entry<String, Object> line : nameTagX.getStaticLines().entrySet()) {
-            addArmorStand(line.getKey(), new BukkitArmorStand(this, owner, line.getKey(), Double.parseDouble(line.getValue().toString()), true));
-        }
-        fixArmorStandHeights();
-    }
-
-    /**
-     * Teleports armor stands to player's current location for specified viewer
-     *
-     * @param   viewer
-     *          player to teleport armor stands for
-     */
-    public void teleport(TabPlayer viewer) {
-        for (ArmorStand a : armorStandArray) a.teleport(viewer);
-    }
-
-    /**
-     * Teleports armor stands to player's current location for all nearby players
-     */
-    public void teleport() {
-        for (ArmorStand a : armorStandArray) a.teleport();
-    }
-
-    /**
-     * Returns array of nearby players
-     * @return array of nearby players
-     */
-    public TabPlayer[] getNearbyPlayers(){
-        return nearbyPlayerArray;
-    }
-
-    /**
-     * Returns {@code true} if requested player is nearby, {@code false} if not
-     *
-     * @param   viewer
-     *          Player to check for
-     * @return  {@code true} if player nearby, {@code false} if not
-     */
-    public boolean isNearby(TabPlayer viewer) {
-        return nearbyPlayers.contains(viewer);
-    }
-
-    /**
-     * Returns true if manager contains armor stand with specified entity id, false if not
-     *
-     * @param   entityId
-     *          entity id
-     * @return  true if armor stand with specified entity id exists, false if not
-     */
-    public boolean hasArmorStandWithID(int entityId) {
-        for (ArmorStand a : armorStandArray) {
-            if (a.getEntityId() == entityId) {
-                return true;
-            }
-        }
-        return false;
-    }
-
-    /**
-     * Sets sneak value of armor stands to specified value
-     *
-     * @param   sneaking
-     *          new sneaking status
-     */
-    public void sneak(boolean sneaking) {
-        for (ArmorStand a : armorStandArray) a.sneak(sneaking);
-    }
-
-    /**
-     * Performs respawn operation on all armor stands to skip teleport animation
-     */
-    public void respawn() {
-        for (ArmorStand a : armorStandArray) {
-            for (TabPlayer viewer : nearbyPlayerArray) {
-                a.respawn(viewer);
-            }
-        }
-    }
-
-    /**
-     * Spawns all armor stands for specified viewer and adds them into nearby players
-     *
-     * @param   viewer
-     *          player to spawn armor stands for
-     */
-    public void spawn(TabPlayer viewer) {
-        nearbyPlayers.add(viewer);
-        nearbyPlayerArray = nearbyPlayers.toArray(new TabPlayer[0]);
-        if (viewer.getVersion().getMinorVersion() < 8) return;
-        for (ArmorStand a : armorStandArray) a.spawn(viewer);
-    }
-
-    /**
-     * Fixes heights of all armor stands due to dynamic lines
-     */
-    public void fixArmorStandHeights() {
-        double currentY = -0.26;
-        for (ArmorStand as : armorStandArray) {
-            if (as.hasStaticOffset()) continue;
-            if (as.getProperty().get().length() != 0) {
-                currentY += 0.26;
-                as.setOffset(currentY);
-            }
-        }
-    }
-
-    /**
-     * Adds armor stand to list and registers it to all nearby players
-     *
-     * @param   name
-     *          Unique identifier of the text line
-     * @param   as
-     *          Armor stand to add
-     */
-    public void addArmorStand(String name, ArmorStand as) {
-        armorStands.put(name, as);
-        armorStandArray = armorStands.values().toArray(new ArmorStand[0]);
-        for (TabPlayer p : nearbyPlayerArray) as.spawn(p);
-    }
-
-    /**
-     * Removes specified player from list of nearby players
-     *
-     * @param   viewer
-     *          player to remove
-     */
-    public void unregisterPlayer(TabPlayer viewer) {
-        if (nearbyPlayers.remove(viewer)) nearbyPlayerArray = nearbyPlayers.toArray(new TabPlayer[0]);
-    }
-
-    public void updateVisibility(boolean force) {
-        for (ArmorStand a : armorStandArray) a.updateVisibility(force);
-    }
-
-    /**
-     * Sends destroy packet of all armor stands to specified player and removes them from nearby players list
-     *
-     * @param   viewer
-     *          player to destroy armor stands for
-     */
-    public void destroy(TabPlayer viewer) {
-        for (ArmorStand a : armorStandArray) a.destroy(viewer);
-        unregisterPlayer(viewer);
-    }
-
-    @Override
-    public void destroy() {
-        for (ArmorStand a : armorStandArray) a.destroy();
-        nearbyPlayers.clear();
-        nearbyPlayerArray = new TabPlayer[0];
-    }
-
-    @Override
-    public void refresh(boolean force) {
-        boolean fix = false;
-        for (ArmorStand as : armorStandArray) {
-            if (as.getProperty().update() || force) {
-                as.refresh();
-                fix = true;
-            }
-        }
-        if (fix) fixArmorStandHeights();
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/unlimitedtags/BukkitNameTagX.java

@@ -1,169 +1,202 @@
 package me.neznamy.tab.platforms.bukkit.features.unlimitedtags;
 
+import lombok.RequiredArgsConstructor;
 import me.neznamy.tab.api.TabAPI;
 import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.shared.features.nametags.unlimited.NameTagX;
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
+import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutEntityDestroyStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutEntityTeleportStorage;
+import me.neznamy.tab.shared.backend.features.unlimitedtags.BackendNameTagX;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.EntityType;
 import org.bukkit.entity.Player;
+import org.bukkit.entity.Pose;
 import org.bukkit.event.HandlerList;
 import org.bukkit.plugin.java.JavaPlugin;
 
-/**
- * The core class for unlimited NameTag mode
- */
-public class BukkitNameTagX extends NameTagX {
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
 
-    //bukkit event listener
+/**
+ * The core class for unlimited NameTag mode on Bukkit
+ */
+@RequiredArgsConstructor
+public class BukkitNameTagX extends BackendNameTagX {
+
+    /** Reference to NMS storage for quick access */
+    private final NMSStorage nms = NMSStorage.getInstance();
+
+    /** Bukkit event listener */
     private final EventListener eventListener = new EventListener(this);
 
-    private final VehicleRefresher vehicleManager = new VehicleRefresher(this);
-
-    /**
-     * Constructs new instance with given parameters and loads config options
-     *
-     * @param   plugin
-     *          plugin instance
-     */
-    public BukkitNameTagX(JavaPlugin plugin) {
-        super(BukkitArmorStandManager::new);
-        Bukkit.getPluginManager().registerEvents(eventListener, plugin);
-        TabAPI.getInstance().getFeatureManager().registerFeature(TabConstants.Feature.UNLIMITED_NAME_TAGS_PACKET_LISTENER, new PacketListener(this));
-        TabAPI.getInstance().getFeatureManager().registerFeature(TabConstants.Feature.UNLIMITED_NAME_TAGS_VEHICLE_REFRESHER, vehicleManager);
-    }
+    /** Plugin reference */
+    private final JavaPlugin plugin;
 
     @Override
     public void load() {
+        Bukkit.getPluginManager().registerEvents(eventListener, plugin);
         super.load();
-        for (TabPlayer all : TabAPI.getInstance().getOnlinePlayers()) {
-            if (isPlayerDisabled(all)) continue;
-            for (TabPlayer viewer : TabAPI.getInstance().getOnlinePlayers()) {
-                spawnArmorStands(viewer, all);
+    }
+
+    @Override
+    public boolean onPacketReceive(TabPlayer sender, Object packet) throws ReflectiveOperationException {
+        if (sender.getVersion().getMinorVersion() == 8 && nms.PacketPlayInUseEntity.isInstance(packet)) {
+            int entityId = nms.PacketPlayInUseEntity_ENTITY.getInt(packet);
+            TabPlayer attacked = null;
+            for (TabPlayer all : TabAPI.getInstance().getOnlinePlayers()) {
+                if (all.isLoaded() && getArmorStandManager(all).hasArmorStandWithID(entityId)) {
+                    attacked = all;
+                    break;
+                }
+            }
+            if (attacked != null && attacked != sender) {
+                nms.PacketPlayInUseEntity_ENTITY.set(packet, getEntityId(attacked));
             }
         }
-        startVisibilityRefreshTask();
-    }
-
-    private void startVisibilityRefreshTask() {
-        TabAPI.getInstance().getThreadManager().startRepeatingMeasuredTask(500, this, TabConstants.CpuUsageCategory.REFRESHING_NAME_TAG_VISIBILITY, () -> {
-
-            for (TabPlayer p : TabAPI.getInstance().getOnlinePlayers()) {
-                if (isPlayerDisabled(p)) continue;
-                getArmorStandManager(p).updateVisibility(false);
-            }
-        });
+        return false;
     }
 
+    @SuppressWarnings("unchecked")
     @Override
-    public void unload() {
-        super.unload();
-        HandlerList.unregisterAll(eventListener);
-    }
-
-    @Override
-    public void onJoin(TabPlayer connectedPlayer) {
-        super.onJoin(connectedPlayer);
-        if (isPlayerDisabled(connectedPlayer)) return;
-        for (TabPlayer viewer : TabAPI.getInstance().getOnlinePlayers()) {
-            spawnArmorStands(viewer, connectedPlayer);
-            spawnArmorStands(connectedPlayer, viewer);
-        }
-    }
-
-    @Override
-    public boolean isOnBoat(TabPlayer player) {
-        return vehicleManager != null && vehicleManager.isOnBoat(player);
-    }
-
-    private void spawnArmorStands(TabPlayer viewer, TabPlayer target) {
-        if (viewer.getVersion().getMinorVersion() < 8) return;
-        if (target == viewer || isPlayerDisabled(target)) return;
-        if (((Player) viewer.getPlayer()).getWorld() != ((Player) target.getPlayer()).getWorld()) return;
-        if (getDistance(viewer, target) <= 48 && ((Player)viewer.getPlayer()).canSee((Player)target.getPlayer()) && !target.isVanished())
-            getArmorStandManager(target).spawn(viewer);
-    }
-
-    @Override
-    public void setNameTagPreview(TabPlayer player, boolean status) {
-        if (status) {
-            getArmorStandManager(player).spawn(player);
-        } else {
-            getArmorStandManager(player).destroy(player);
-        }
-    }
-
-    @Override
-    public void resumeArmorStands(TabPlayer player) {
-        if (isPlayerDisabled(player)) return;
-        for (TabPlayer viewer : TabAPI.getInstance().getOnlinePlayers()) {
-            spawnArmorStands(viewer, player);
-        }
-    }
-
-    @Override
-    public void pauseArmorStands(TabPlayer player) {
-        getArmorStandManager(player).destroy();
-    }
-
-    @Override
-    public void updateNameTagVisibilityView(TabPlayer player) {
-        for (TabPlayer all : TabAPI.getInstance().getOnlinePlayers()) {
-            getArmorStandManager(all).updateVisibility(true);
-        }
-    }
-
-    @Override
-    public void onQuit(TabPlayer disconnectedPlayer) {
-        super.onQuit(disconnectedPlayer);
-        for (TabPlayer all : TabAPI.getInstance().getOnlinePlayers()) {
-            getArmorStandManager(all).unregisterPlayer(disconnectedPlayer);
-        }
-        armorStandManagerMap.get(disconnectedPlayer).destroy();
-        armorStandManagerMap.remove(disconnectedPlayer); // WeakHashMap doesn't clear this due to value referencing the key
-    }
-
-    @Override
-    public void onWorldChange(TabPlayer p, String from, String to) {
-        super.onWorldChange(p, from, to);
-        if (isUnlimitedDisabled(p.getServer(), to)) {
-            getDisabledUnlimitedPlayers().add(p);
-            updateTeamData(p);
-        } else if (getDisabledUnlimitedPlayers().remove(p)) {
-            updateTeamData(p);
-        }
-        if (isPreviewingNametag(p)) {
-            getArmorStandManager(p).spawn(p);
-        }
-        //for some reason this is needed for some users
-        for (TabPlayer viewer : TabAPI.getInstance().getOnlinePlayers()) {
-            if (viewer.getWorld().equals(from)) {
-                getArmorStandManager(p).destroy(viewer);
+    public void onPacketSend(TabPlayer receiver, Object packet) throws ReflectiveOperationException {
+        if (receiver.getVersion().getMinorVersion() < 8) return;
+        if (!receiver.isLoaded() || isDisabledPlayer(receiver) || getDisabledUnlimitedPlayers().contains(receiver)) return;
+        if (nms.PacketPlayOutEntity.isInstance(packet) && !nms.PacketPlayOutEntityLook.isInstance(packet)) { //ignoring head rotation only packets
+            packetListener.onEntityMove(receiver, nms.PacketPlayOutEntity_ENTITYID.getInt(packet));
+        } else if (PacketPlayOutEntityTeleportStorage.CLASS.isInstance(packet)) {
+            packetListener.onEntityMove(receiver, PacketPlayOutEntityTeleportStorage.ENTITY_ID.getInt(packet));
+        } else if (nms.PacketPlayOutNamedEntitySpawn.isInstance(packet)) {
+            packetListener.onEntitySpawn(receiver, nms.PacketPlayOutNamedEntitySpawn_ENTITYID.getInt(packet));
+        } else if (PacketPlayOutEntityDestroyStorage.CLASS.isInstance(packet)) {
+            if (nms.getMinorVersion() >= 17) {
+                Object entities = PacketPlayOutEntityDestroyStorage.ENTITIES.get(packet);
+                if (entities instanceof List) {
+                    packetListener.onEntityDestroy(receiver, (List<Integer>) entities);
+                } else {
+                    //1.17.0
+                    packetListener.onEntityDestroy(receiver, (int) entities);
+                }
+            } else {
+                packetListener.onEntityDestroy(receiver, (int[]) PacketPlayOutEntityDestroyStorage.ENTITIES.get(packet));
             }
         }
     }
 
-    /**
-     * Returns flat distance between two players ignoring Y value
-     *
-     * @param   player1
-     *          first player
-     * @param   player2
-     *          second player
-     * @return  flat distance in blocks
-     */
-    private double getDistance(TabPlayer player1, TabPlayer player2) {
+    @Override
+    public double getDistance(TabPlayer player1, TabPlayer player2) {
         Location loc1 = ((Player) player1.getPlayer()).getLocation();
         Location loc2 = ((Player) player2.getPlayer()).getLocation();
         return Math.sqrt(Math.pow(loc1.getX()-loc2.getX(), 2) + Math.pow(loc1.getZ()-loc2.getZ(), 2));
     }
 
     @Override
-    public BukkitArmorStandManager getArmorStandManager(TabPlayer player) {
-        return (BukkitArmorStandManager) armorStandManagerMap.get(player);
+    public boolean areInSameWorld(TabPlayer player1, TabPlayer player2) {
+        return ((Player) player1.getPlayer()).getWorld() == ((Player) player1.getPlayer()).getWorld();
     }
 
-    public VehicleRefresher getVehicleManager() {
-        return vehicleManager;
+    @Override
+    public boolean canSee(TabPlayer viewer, TabPlayer target) {
+        return ((Player)viewer.getPlayer()).canSee((Player)target.getPlayer());
+    }
+
+    @Override
+    public void unregisterListener() {
+        HandlerList.unregisterAll(eventListener);
+    }
+
+    @SuppressWarnings("deprecation")
+    @Override
+    public List<Integer> getPassengers(Object entity) {
+        Entity vehicle = (Entity) entity;
+        if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 11) {
+            return vehicle.getPassengers().stream().map(Entity::getEntityId).collect(Collectors.toList());
+        } else {
+            if (vehicle.getPassenger() != null) {
+                return Collections.singletonList(vehicle.getPassenger().getEntityId());
+            } else {
+                return Collections.emptyList();
+            }
+        }
+    }
+
+    @Override
+    public void registerVehiclePlaceholder() {
+        TabAPI.getInstance().getPlaceholderManager().registerPlayerPlaceholder(TabConstants.Placeholder.VEHICLE, 100, p -> {
+            Entity v = ((Player)p.getPlayer()).getVehicle();
+            //There's a bug in Bukkit 1.19.3 throwing NPE on .toString(), use default toString implementation
+            return v == null ? "" : v.getClass().getName() + "@" + Integer.toHexString(v.hashCode());
+        });
+    }
+
+    @Override
+    public Object getVehicle(TabPlayer player) {
+        return ((Player)player.getPlayer()).getVehicle();
+    }
+
+    @Override
+    public int getEntityId(Object entity) {
+        return ((Entity)entity).getEntityId();
+    }
+
+    @Override
+    public String getEntityType(Object entity) {
+        return ((Entity) entity).getType().toString().toLowerCase();
+    }
+
+    @Override
+    public boolean isSneaking(TabPlayer player) {
+        return ((Player)player.getPlayer()).isSneaking();
+    }
+
+    @Override
+    public boolean isSwimming(TabPlayer player) {
+        Player p = (Player) player.getPlayer();
+        if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 14 && p.getPose() == Pose.SWIMMING) return true;
+        return TabAPI.getInstance().getServerVersion().getMinorVersion() == 13 && p.isSwimming();
+    }
+
+    @Override
+    public boolean isGliding(TabPlayer player) {
+        return TabAPI.getInstance().getServerVersion().getMinorVersion() >= 9 && ((Player)player.getPlayer()).isGliding();
+    }
+
+    @Override
+    public boolean isSleeping(TabPlayer player) {
+        return ((Player)player.getPlayer()).isSleeping();
+    }
+
+    @Override
+    public Object getArmorStandType() {
+        return EntityType.ARMOR_STAND;
+    }
+
+    @Override
+    public double getX(TabPlayer player) {
+        return ((Player)player.getPlayer()).getLocation().getX();
+    }
+
+    @Override
+    public double getY(Object entity) {
+        return ((Entity)entity).getLocation().getY();
+    }
+
+    @Override
+    public double getZ(TabPlayer player) {
+        return ((Player)player.getPlayer()).getLocation().getZ();
+    }
+
+    @Override
+    public Object createDataWatcher(TabPlayer viewer, byte flags, String displayName, boolean nameVisible, boolean markerFlag) {
+        DataWatcher datawatcher = new DataWatcher();
+        datawatcher.getHelper().setEntityFlags(flags);
+        datawatcher.getHelper().setCustomName(displayName, viewer.getVersion());
+        datawatcher.getHelper().setCustomNameVisible(nameVisible);
+        if (markerFlag) datawatcher.getHelper().setArmorStandFlags((byte)16);
+        return datawatcher;
     }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/unlimitedtags/EventListener.java

@@ -1,5 +1,6 @@
 package me.neznamy.tab.platforms.bukkit.features.unlimitedtags;
 
+import lombok.RequiredArgsConstructor;
 import me.neznamy.tab.api.TabAPI;
 import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.api.TabPlayer;
@@ -10,23 +11,15 @@ import org.bukkit.event.player.PlayerRespawnEvent;
 import org.bukkit.event.player.PlayerToggleSneakEvent;
 
 /**
- * The event listener part for securing proper functionality of armor stands
+ * Class listening to Bukkit events which the feature requires and are
+ * sufficient, without packets being requires.
  */
+@RequiredArgsConstructor
 public class EventListener implements Listener {
 
-    //the NameTag feature handler
+    /** Reference to the main feature */
     private final BukkitNameTagX feature;
 
-    /**
-     * Constructs new instance with given parameters
-     *
-     * @param   feature
-     *          NameTag feature handler
-     */
-    public EventListener(BukkitNameTagX feature) {
-        this.feature = feature;
-    }
-
     /**
      * Sneak event listener to de-spawn and spawn armor stands to skip animation
      *

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/unlimitedtags/PacketListener.java

@@ -1,158 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.features.unlimitedtags;
-
-import me.neznamy.tab.api.TabAPI;
-import me.neznamy.tab.api.TabConstants;
-import me.neznamy.tab.api.TabFeature;
-import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
-import org.bukkit.entity.Entity;
-import org.bukkit.entity.Player;
-
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
-
-/**
- * The packet listening part for securing proper functionality of armor stands
- * Bukkit events are too unreliable and delayed/ahead which causes de-sync
- */
-public class PacketListener extends TabFeature {
-
-    //main feature
-    private final BukkitNameTagX nameTagX;
-
-    //player data by entityId, used for better performance
-    private final Map<Integer, TabPlayer> entityIdMap = new ConcurrentHashMap<>();
-    
-    //nms storage
-    private final NMSStorage nms = NMSStorage.getInstance();
-
-    /**
-     * Constructs new instance with given parameters and loads config options
-     *
-     * @param   nameTagX
-     *          main feature
-     */
-    public PacketListener(BukkitNameTagX nameTagX) {
-        super(nameTagX.getFeatureName(), null);
-        this.nameTagX = nameTagX;
-    }
-
-    @Override
-    public void load() {
-        for (TabPlayer all : TabAPI.getInstance().getOnlinePlayers()) {
-            entityIdMap.put(((Player) all.getPlayer()).getEntityId(), all);
-        }
-    }
-
-    @Override
-    public void onJoin(TabPlayer connectedPlayer) {
-        entityIdMap.put(((Player) connectedPlayer.getPlayer()).getEntityId(), connectedPlayer);
-    }
-
-    @Override
-    public void onQuit(TabPlayer disconnectedPlayer) {
-        entityIdMap.remove(((Player) disconnectedPlayer.getPlayer()).getEntityId());
-    }
-
-    @Override
-    public boolean onPacketReceive(TabPlayer sender, Object packet) throws ReflectiveOperationException {
-        if (sender.getVersion().getMinorVersion() == 8 && nms.PacketPlayInUseEntity.isInstance(packet)) {
-            int entityId = nms.PacketPlayInUseEntity_ENTITY.getInt(packet);
-            TabPlayer attacked = null;
-            for (TabPlayer all : TabAPI.getInstance().getOnlinePlayers()) {
-                if (all.isLoaded() && nameTagX.getArmorStandManager(all).hasArmorStandWithID(entityId)) {
-                    attacked = all;
-                    break;
-                }
-            }
-            if (attacked != null && attacked != sender) {
-                nms.setField(packet, nms.PacketPlayInUseEntity_ENTITY, ((Player) attacked.getPlayer()).getEntityId());
-            }
-        }
-        return false;
-    }
-
-    @SuppressWarnings("unchecked")
-    @Override
-    public void onPacketSend(TabPlayer receiver, Object packet) throws ReflectiveOperationException {
-        if (receiver.getVersion().getMinorVersion() < 8) return;
-        if (!receiver.isLoaded() || nameTagX.isDisabledPlayer(receiver) || nameTagX.getDisabledUnlimitedPlayers().contains(receiver)) return;
-        if (nms.PacketPlayOutEntity.isInstance(packet) && !nms.PacketPlayOutEntityLook.isInstance(packet)) { //ignoring head rotation only packets
-            onEntityMove(receiver, nms.PacketPlayOutEntity_ENTITYID.getInt(packet));
-        } else if (nms.PacketPlayOutEntityTeleport.isInstance(packet)) {
-            onEntityMove(receiver, nms.PacketPlayOutEntityTeleport_ENTITYID.getInt(packet));
-        } else if (nms.PacketPlayOutNamedEntitySpawn.isInstance(packet)) {
-            onEntitySpawn(receiver, nms.PacketPlayOutNamedEntitySpawn_ENTITYID.getInt(packet));
-        } else if (nms.PacketPlayOutEntityDestroy.isInstance(packet)) {
-            if (nms.getMinorVersion() >= 17) {
-                Object entities = nms.PacketPlayOutEntityDestroy_ENTITIES.get(packet);
-                if (entities instanceof List) {
-                    onEntityDestroy(receiver, (List<Integer>) entities);
-                } else {
-                    //1.17.0
-                    onEntityDestroy(receiver, (int) entities);
-                }
-            } else {
-                onEntityDestroy(receiver, (int[]) nms.PacketPlayOutEntityDestroy_ENTITIES.get(packet));
-            }
-        }
-    }
-
-    /**
-     * Processes entity move packet
-     *
-     * @param   receiver
-     *          packet receiver
-     * @param   entityId
-     *          entity that moved
-     */
-    private void onEntityMove(TabPlayer receiver, int entityId) {
-        TabPlayer pl = entityIdMap.get(entityId);
-        List<Entity> vehicleList;
-        if (pl != null) {
-            //player moved
-            if (nameTagX.isPlayerDisabled(pl) || !pl.isLoaded()) return;
-            TabAPI.getInstance().getThreadManager().runMeasuredTask(nameTagX, TabConstants.CpuUsageCategory.PACKET_ENTITY_MOVE,
-                    () -> nameTagX.getArmorStandManager(pl).teleport(receiver));
-        } else if ((vehicleList = nameTagX.getVehicleManager().getVehicles().get(entityId)) != null){
-            //a vehicle carrying something moved
-            for (Entity entity : vehicleList) {
-                TabPlayer passenger = entityIdMap.get(entity.getEntityId());
-                if (passenger != null && nameTagX.getArmorStandManager(passenger) != null) {
-                    TabAPI.getInstance().getThreadManager().runMeasuredTask(nameTagX, TabConstants.CpuUsageCategory.PACKET_ENTITY_MOVE_PASSENGER,
-                            () -> nameTagX.getArmorStandManager(passenger).teleport(receiver));
-                }
-            }
-        }
-    }
-    
-    private void onEntitySpawn(TabPlayer receiver, int entityId) {
-        TabPlayer spawnedPlayer = entityIdMap.get(entityId);
-        if (spawnedPlayer != null && spawnedPlayer.isLoaded() && !nameTagX.isPlayerDisabled(spawnedPlayer)) {
-            TabAPI.getInstance().getThreadManager().runMeasuredTask(nameTagX, TabConstants.CpuUsageCategory.PACKET_ENTITY_SPAWN,
-                    () -> nameTagX.getArmorStandManager(spawnedPlayer).spawn(receiver));
-        }
-    }
-
-    private void onEntityDestroy(TabPlayer receiver, List<Integer> entities) {
-        for (int entity : entities) {
-            onEntityDestroy(receiver, entity);
-        }
-    }
-    
-    private void onEntityDestroy(TabPlayer receiver, int... entities) {
-        for (int entity : entities) {
-            onEntityDestroy(receiver, entity);
-        }
-    }
-    
-    private void onEntityDestroy(TabPlayer receiver, int entity) {
-        TabPlayer deSpawnedPlayer = entityIdMap.get(entity);
-        if (deSpawnedPlayer != null && deSpawnedPlayer.isLoaded() && !nameTagX.isPlayerDisabled(deSpawnedPlayer)) {
-            BukkitArmorStandManager asm = nameTagX.getArmorStandManager(deSpawnedPlayer);
-            TabAPI.getInstance().getThreadManager().runMeasuredTask(nameTagX, TabConstants.CpuUsageCategory.PACKET_ENTITY_DESTROY,
-                    () -> asm.destroy(receiver));
-        }
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/BukkitModernNMSStorage.java

@@ -1,104 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms;
-
-/**
- * NMS loader for minecraft 1.17+ using Mojang packaging and bukkit names.
- */
-public class BukkitModernNMSStorage extends ModernNMSStorage {
-
-    /**
-     * Creates new instance, initializes required NMS classes and fields
-     *
-     * @throws  ReflectiveOperationException
-     *          If any class, field or method fails to load
-     */
-    public BukkitModernNMSStorage() throws ReflectiveOperationException {
-    }
-
-    @Override
-    public void loadNamedFieldsAndMethods() throws ReflectiveOperationException {
-        PING = getField(EntityPlayer, "e");
-        ChatSerializer_DESERIALIZE = getMethod(ChatSerializer, "a", String.class);
-        DataWatcher_REGISTER = getMethod(DataWatcher, new String[]{"register", "a"}, DataWatcherObject, Object.class); // {Bukkit, Bukkit 1.18+}
-        ScoreboardScore_setScore = getMethod(ScoreboardScore, new String[]{"setScore", "b"}, int.class); // {Bukkit, Bukkit 1.18+}
-        ScoreboardTeam_setAllowFriendlyFire = getMethod(ScoreboardTeam, new String[]{"setAllowFriendlyFire", "a"}, boolean.class); // {Bukkit, Bukkit 1.18+}
-        ScoreboardTeam_setCanSeeFriendlyInvisibles = getMethod(ScoreboardTeam, new String[]{"setCanSeeFriendlyInvisibles", "b"}, boolean.class); // {Bukkit, Bukkit 1.18+}
-        ScoreboardTeam_setPrefix = getMethod(ScoreboardTeam, new String[]{"setPrefix", "b"}, IChatBaseComponent); // {Bukkit, Bukkit 1.18+}
-        ScoreboardTeam_setSuffix = getMethod(ScoreboardTeam, new String[]{"setSuffix", "c"}, IChatBaseComponent); // {Bukkit, Bukkit 1.18+}
-        ScoreboardTeam_setNameTagVisibility = getMethod(ScoreboardTeam, new String[]{"setNameTagVisibility", "a"}, EnumNameTagVisibility); // {Bukkit, Bukkit 1.18+}
-        if (minorVersion >= 19) {
-            Registry_a = Registry.getMethod("a", int.class);
-            IRegistry_X = IRegistry.getDeclaredField("X").get(null);
-            PacketPlayOutSpawnEntityLiving_ENTITYTYPE = getField(PacketPlayOutSpawnEntityLiving, "e");
-        }
-    }
-
-    @Override
-    public void loadClasses() throws ClassNotFoundException {
-        ChatSerializer = Class.forName("net.minecraft.network.chat.IChatBaseComponent$ChatSerializer");
-        World = Class.forName("net.minecraft.world.level.World");
-        EntityArmorStand = Class.forName("net.minecraft.world.entity.decoration.EntityArmorStand");
-        EntityHuman = Class.forName("net.minecraft.world.entity.player.EntityHuman");
-        NetworkManager = Class.forName("net.minecraft.network.NetworkManager");
-        IChatBaseComponent = Class.forName("net.minecraft.network.chat.IChatBaseComponent");
-        Packet = Class.forName("net.minecraft.network.protocol.Packet");
-        EnumChatFormat = Class.forName("net.minecraft.EnumChatFormat");
-        EntityPlayer = Class.forName("net.minecraft.server.level.EntityPlayer");
-        Entity = Class.forName("net.minecraft.world.entity.Entity");
-        EntityLiving = Class.forName("net.minecraft.world.entity.EntityLiving");
-        PlayerConnection = Class.forName("net.minecraft.server.network.PlayerConnection");
-        PacketPlayOutPlayerListHeaderFooter = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutPlayerListHeaderFooter");
-        PacketPlayOutChat = getModernClass("net.minecraft.network.protocol.game.ClientboundSystemChatPacket",
-                "net.minecraft.network.protocol.game.PacketPlayOutChat");
-        if (minorVersion < 19) {
-            ChatMessageType = Class.forName("net.minecraft.network.chat.ChatMessageType");
-        }
-
-        // DataWatcher
-        DataWatcher = Class.forName("net.minecraft.network.syncher.DataWatcher");
-        DataWatcherItem = Class.forName("net.minecraft.network.syncher.DataWatcher$Item");
-        DataWatcherObject = Class.forName("net.minecraft.network.syncher.DataWatcherObject");
-        DataWatcherRegistry = Class.forName("net.minecraft.network.syncher.DataWatcherRegistry");
-        DataWatcherSerializer = Class.forName("net.minecraft.network.syncher.DataWatcherSerializer");
-
-        // Entities
-        PacketPlayOutSpawnEntityLiving = getModernClass("net.minecraft.network.protocol.game.PacketPlayOutSpawnEntityLiving",
-                "net.minecraft.network.protocol.game.PacketPlayOutSpawnEntity");
-        PacketPlayOutEntityTeleport = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntityTeleport");
-        PacketPlayInUseEntity = Class.forName("net.minecraft.network.protocol.game.PacketPlayInUseEntity");
-        PacketPlayInUseEntity$d = Class.forName("net.minecraft.network.protocol.game.PacketPlayInUseEntity$d");
-        PacketPlayOutEntity = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntity");
-        PacketPlayOutEntityDestroy = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntityDestroy");
-        PacketPlayOutEntityLook = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntity$PacketPlayOutEntityLook");
-        PacketPlayOutEntityMetadata = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntityMetadata");
-        PacketPlayOutNamedEntitySpawn = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutNamedEntitySpawn");
-        EnumEntityUseAction = Class.forName("net.minecraft.network.protocol.game.PacketPlayInUseEntity$EnumEntityUseAction");
-        if (minorVersion >= 19) {
-            Registry = Class.forName("net.minecraft.core.Registry");
-            IRegistry = Class.forName("net.minecraft.core.IRegistry");
-            ProfilePublicKey = Class.forName("net.minecraft.world.entity.player.ProfilePublicKey");
-            ProfilePublicKey$a = Class.forName("net.minecraft.world.entity.player.ProfilePublicKey$a");
-        }
-
-        // Player Info
-        PacketPlayOutPlayerInfo = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutPlayerInfo");
-        EnumPlayerInfoAction = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutPlayerInfo$EnumPlayerInfoAction");
-        PlayerInfoData = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutPlayerInfo$PlayerInfoData");
-        EnumGamemode = Class.forName("net.minecraft.world.level.EnumGamemode");
-
-        // Scoreboard
-        PacketPlayOutScoreboardDisplayObjective = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardDisplayObjective");
-        PacketPlayOutScoreboardObjective = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardObjective");
-        Scoreboard = Class.forName("net.minecraft.world.scores.Scoreboard");
-        PacketPlayOutScoreboardScore = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardScore");
-        ScoreboardObjective = Class.forName("net.minecraft.world.scores.ScoreboardObjective");
-        ScoreboardScore = Class.forName("net.minecraft.world.scores.ScoreboardScore");
-        IScoreboardCriteria = Class.forName("net.minecraft.world.scores.criteria.IScoreboardCriteria");
-        EnumScoreboardHealthDisplay = Class.forName("net.minecraft.world.scores.criteria.IScoreboardCriteria$EnumScoreboardHealthDisplay");
-        EnumScoreboardAction = Class.forName("net.minecraft.server.ScoreboardServer$Action");
-        PacketPlayOutScoreboardTeam = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardTeam");
-        ScoreboardTeam = Class.forName("net.minecraft.world.scores.ScoreboardTeam");
-        EnumNameTagVisibility = Class.forName("net.minecraft.world.scores.ScoreboardTeamBase$EnumNameTagVisibility");
-        EnumTeamPush = Class.forName("net.minecraft.world.scores.ScoreboardTeamBase$EnumTeamPush");
-        PacketPlayOutScoreboardTeam_PlayerAction = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardTeam$a");
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/LegacyNMSStorage.java

@@ -1,164 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms;
-
-import me.neznamy.tab.platforms.bukkit.Main;
-
-import java.util.Arrays;
-
-/**
- * NMS loader for Minecraft 1.16.5 and lower using old NMS class structure.
- */
-public class LegacyNMSStorage extends NMSStorage {
-
-    /**
-     * Creates new instance, initializes required NMS classes and fields
-     *
-     * @throws  ReflectiveOperationException
-     *          If any class, field or method fails to load
-     */
-    public LegacyNMSStorage() throws ReflectiveOperationException {
-    }
-
-    /**
-     * Returns class with given potential names in same order
-     *
-     * @param   names
-     *          possible class names
-     * @return  class for specified names
-     * @throws  ClassNotFoundException
-     *          if class does not exist
-     */
-    private Class<?> getLegacyClass(String... names) throws ClassNotFoundException {
-        for (String name : names) {
-            try {
-                return getLegacyClass(name);
-            } catch (ClassNotFoundException e) {
-                //not the first class name in array
-            }
-        }
-        throw new ClassNotFoundException("No class found with possible names " + Arrays.toString(names));
-    }
-
-    /**
-     * Returns class from given name
-     *
-     * @param   name
-     *          class name
-     * @return  class from given name
-     * @throws  ClassNotFoundException
-     *          if class was not found
-     */
-    private Class<?> getLegacyClass(String name) throws ClassNotFoundException {
-        try {
-            return Class.forName("net.minecraft.server." + serverPackage + "." + name);
-        } catch (ClassNotFoundException | NullPointerException e) {
-            try {
-                //modded server?
-                Class<?> clazz = Main.class.getClassLoader().loadClass("net.minecraft.server." + serverPackage + "." + name);
-                if (clazz != null) return clazz;
-            } catch (NullPointerException ignored) {}
-            throw new ClassNotFoundException(name);
-        }
-    }
-
-    @Override
-    public void loadNamedFieldsAndMethods() throws ReflectiveOperationException {
-        PING = getField(EntityPlayer, "ping", "field_71138_i"); // {Bukkit, Thermos}
-        ScoreboardScore_setScore = getMethod(ScoreboardScore, new String[]{"setScore", "func_96647_c"}, int.class); // {Bukkit, Thermos}
-        ScoreboardTeam_setAllowFriendlyFire = getMethod(ScoreboardTeam,
-                new String[]{"setAllowFriendlyFire", "func_96660_a"}, boolean.class); // {Bukkit, Thermos}
-        ScoreboardTeam_setCanSeeFriendlyInvisibles = getMethod(ScoreboardTeam,
-                new String[]{"setCanSeeFriendlyInvisibles", "func_98300_b"}, boolean.class); // {Bukkit, Thermos}
-        if (minorVersion >= 7) {
-            ChatSerializer_DESERIALIZE = getMethod(ChatSerializer, new String[]{"a", "func_150699_a"}, String.class); // {Bukkit, Thermos}
-        }
-        if (minorVersion >= 8) {
-            ScoreboardTeam_setNameTagVisibility = getMethod(ScoreboardTeam, "setNameTagVisibility", EnumNameTagVisibility);
-        }
-        if (minorVersion >= 9) {
-            DataWatcher_REGISTER = getMethod(DataWatcher, "register", DataWatcherObject, Object.class);
-        } else {
-            DataWatcher_REGISTER = getMethod(DataWatcher, new String[]{"a", "func_75682_a"}, int.class, Object.class); // {Bukkit, Thermos}
-        }
-        if (minorVersion >= 13) {
-            ScoreboardTeam_setPrefix = getMethod(ScoreboardTeam, "setPrefix", IChatBaseComponent);
-            ScoreboardTeam_setSuffix = getMethod(ScoreboardTeam, "setSuffix", IChatBaseComponent);
-        } else {
-            ScoreboardTeam_setPrefix = getMethod(ScoreboardTeam, new String[]{"setPrefix", "func_96666_b"}, String.class); // {Bukkit, Thermos}
-            ScoreboardTeam_setSuffix = getMethod(ScoreboardTeam, new String[]{"setSuffix", "func_96662_c"}, String.class); // {Bukkit, Thermos}
-        }
-    }
-
-    @Override
-    public void loadClasses() throws ClassNotFoundException {
-        EntityHuman = getLegacyClass("EntityHuman");
-        World = getLegacyClass("World");
-        Packet = getLegacyClass("Packet");
-        EnumChatFormat = getLegacyClass("EnumChatFormat");
-        EntityPlayer = getLegacyClass("EntityPlayer");
-        Entity = getLegacyClass("Entity");
-        EntityLiving = getLegacyClass("EntityLiving");
-        PlayerConnection = getLegacyClass("PlayerConnection");
-        PacketPlayOutChat = getLegacyClass("PacketPlayOutChat", "Packet3Chat");
-        NetworkManager = getLegacyClass("NetworkManager");
-        if (minorVersion >= 7) {
-            IChatBaseComponent = getLegacyClass("IChatBaseComponent");
-            ChatSerializer = getLegacyClass("IChatBaseComponent$ChatSerializer", "ChatSerializer");
-        }
-        if (minorVersion >= 8) {
-            PacketPlayOutPlayerListHeaderFooter = getLegacyClass("PacketPlayOutPlayerListHeaderFooter");
-            EntityArmorStand = getLegacyClass("EntityArmorStand");
-        }
-        if (minorVersion >= 12) {
-            ChatMessageType = getLegacyClass("ChatMessageType");
-        }
-
-        // DataWatcher
-        DataWatcher = getLegacyClass("DataWatcher");
-        DataWatcherItem = getLegacyClass("DataWatcher$Item", "DataWatcher$WatchableObject", "WatchableObject");
-        if (minorVersion >= 9) {
-            DataWatcherObject = getLegacyClass("DataWatcherObject");
-            DataWatcherRegistry = getLegacyClass("DataWatcherRegistry");
-            DataWatcherSerializer = getLegacyClass("DataWatcherSerializer");
-        }
-
-        // Entities
-        PacketPlayOutSpawnEntityLiving = getLegacyClass("PacketPlayOutSpawnEntityLiving", "Packet24MobSpawn");
-        PacketPlayOutEntityTeleport = getLegacyClass("PacketPlayOutEntityTeleport", "Packet34EntityTeleport");
-        PacketPlayInUseEntity = getLegacyClass("PacketPlayInUseEntity", "Packet7UseEntity");
-        PacketPlayOutEntity = getLegacyClass("PacketPlayOutEntity", "Packet30Entity");
-        PacketPlayOutEntityDestroy = getLegacyClass("PacketPlayOutEntityDestroy", "Packet29DestroyEntity");
-        PacketPlayOutEntityLook = getLegacyClass("PacketPlayOutEntity$PacketPlayOutEntityLook", "PacketPlayOutEntityLook", "Packet32EntityLook");
-        PacketPlayOutEntityMetadata = getLegacyClass("PacketPlayOutEntityMetadata", "Packet40EntityMetadata");
-        PacketPlayOutNamedEntitySpawn = getLegacyClass("PacketPlayOutNamedEntitySpawn", "Packet20NamedEntitySpawn");
-        if (minorVersion >= 7) {
-            EnumEntityUseAction = getLegacyClass("PacketPlayInUseEntity$EnumEntityUseAction", "EnumEntityUseAction");
-        }
-
-        // Player Info
-        if (minorVersion >= 8) {
-            PacketPlayOutPlayerInfo = getLegacyClass("PacketPlayOutPlayerInfo");
-            EnumPlayerInfoAction = getLegacyClass("PacketPlayOutPlayerInfo$EnumPlayerInfoAction", "EnumPlayerInfoAction");
-            PlayerInfoData = getLegacyClass("PacketPlayOutPlayerInfo$PlayerInfoData", "PlayerInfoData");
-            EnumGamemode = getLegacyClass("EnumGamemode", "WorldSettings$EnumGamemode");
-        }
-
-        // Scoreboard
-        PacketPlayOutScoreboardDisplayObjective = getLegacyClass("PacketPlayOutScoreboardDisplayObjective", "Packet208SetScoreboardDisplayObjective");
-        PacketPlayOutScoreboardObjective = getLegacyClass("PacketPlayOutScoreboardObjective", "Packet206SetScoreboardObjective");
-        PacketPlayOutScoreboardTeam = getLegacyClass("PacketPlayOutScoreboardTeam", "Packet209SetScoreboardTeam");
-        PacketPlayOutScoreboardScore = getLegacyClass("PacketPlayOutScoreboardScore", "Packet207SetScoreboardScore");
-        Scoreboard = getLegacyClass("Scoreboard");
-        ScoreboardObjective = getLegacyClass("ScoreboardObjective");
-        ScoreboardScore = getLegacyClass("ScoreboardScore");
-        IScoreboardCriteria = getLegacyClass("IScoreboardCriteria");
-        ScoreboardTeam = getLegacyClass("ScoreboardTeam");
-        if (minorVersion >= 8) {
-            EnumScoreboardHealthDisplay = getLegacyClass("IScoreboardCriteria$EnumScoreboardHealthDisplay", "EnumScoreboardHealthDisplay");
-            EnumScoreboardAction = getLegacyClass("ScoreboardServer$Action", "PacketPlayOutScoreboardScore$EnumScoreboardAction", "EnumScoreboardAction");
-            EnumNameTagVisibility = getLegacyClass("ScoreboardTeamBase$EnumNameTagVisibility", "EnumNameTagVisibility");
-        }
-        if (minorVersion >= 9) {
-            EnumTeamPush = getLegacyClass("ScoreboardTeamBase$EnumTeamPush");
-        }
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/ModernNMSStorage.java

@@ -1,41 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms;
-
-import java.util.Arrays;
-
-/**
- * NMS loader for minecraft 1.17+ using Mojang packaging.
- */
-public abstract class ModernNMSStorage extends NMSStorage {
-
-    protected Class<?> IRegistry;
-    protected Class<?> Registry;
-
-    /**
-     * Creates new instance, initializes required NMS classes and fields
-     *
-     * @throws  ReflectiveOperationException
-     *          If any class, field or method fails to load
-     */
-    public ModernNMSStorage() throws ReflectiveOperationException {
-    }
-
-    /**
-     * Returns class with given potential names in same order
-     *
-     * @param   names
-     *          possible class names
-     * @return  class for specified names
-     * @throws  ClassNotFoundException
-     *          if class does not exist
-     */
-    protected Class<?> getModernClass(String... names) throws ClassNotFoundException {
-        for (String name : names) {
-            try {
-                return Class.forName(name);
-            } catch (ClassNotFoundException e) {
-                //not the first class name in array
-            }
-        }
-        throw new ClassNotFoundException("No class found with possible names " + Arrays.toString(names));
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/MojangModernNMSStorage.java

@@ -1,104 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms;
-
-/**
- * NMS loader for minecraft 1.17+ using Mojang packaging and names.
- */
-public class MojangModernNMSStorage extends ModernNMSStorage {
-
-    /**
-     * Creates new instance, initializes required NMS classes and fields
-     *
-     * @throws  ReflectiveOperationException
-     *          If any class, field or method fails to load
-     */
-    public MojangModernNMSStorage() throws ReflectiveOperationException {
-    }
-
-    @Override
-    public void loadNamedFieldsAndMethods() throws ReflectiveOperationException {
-        PING = getField(EntityPlayer, "latency");
-        ChatSerializer_DESERIALIZE = getMethod(ChatSerializer, "fromJson", String.class);
-        DataWatcher_REGISTER = getMethod(DataWatcher, "define", DataWatcherObject, Object.class);
-        ScoreboardScore_setScore = getMethod(ScoreboardScore, "setScore", int.class);
-        ScoreboardTeam_setAllowFriendlyFire = getMethod(ScoreboardTeam, "setAllowFriendlyFire", boolean.class);
-        ScoreboardTeam_setCanSeeFriendlyInvisibles = getMethod(ScoreboardTeam, "setSeeFriendlyInvisibles", boolean.class);
-        ScoreboardTeam_setPrefix = getMethod(ScoreboardTeam, "setPlayerPrefix", IChatBaseComponent);
-        ScoreboardTeam_setSuffix = getMethod(ScoreboardTeam, "setPlayerSuffix", IChatBaseComponent);
-        ScoreboardTeam_setNameTagVisibility = getMethod(ScoreboardTeam, "setNameTagVisibility", EnumNameTagVisibility);
-        if (minorVersion >= 19) {
-            Registry_a = Registry.getMethod("byId", int.class);
-            IRegistry_X = IRegistry.getDeclaredField("ENTITY_TYPE").get(null);
-            PacketPlayOutSpawnEntityLiving_ENTITYTYPE = getField(PacketPlayOutSpawnEntityLiving, "type");
-        }
-    }
-
-    @Override
-    public void loadClasses() throws ClassNotFoundException {
-        IChatBaseComponent = Class.forName("net.minecraft.network.chat.Component");
-        ChatSerializer = Class.forName("net.minecraft.network.chat.Component$Serializer");
-        World = Class.forName("net.minecraft.world.level.Level");
-        EntityArmorStand = Class.forName("net.minecraft.world.entity.decoration.ArmorStand");
-        EntityHuman = Class.forName("net.minecraft.world.entity.player.Player");
-        NetworkManager = Class.forName("net.minecraft.network.Connection");
-        Packet = Class.forName("net.minecraft.network.protocol.Packet");
-        EnumChatFormat = Class.forName("net.minecraft.ChatFormatting");
-        EntityPlayer = Class.forName("net.minecraft.server.level.ServerPlayer");
-        Entity = Class.forName("net.minecraft.world.entity.Entity");
-        EntityLiving = Class.forName("net.minecraft.world.entity.LivingEntity");
-        PlayerConnection = Class.forName("net.minecraft.server.network.ServerGamePacketListenerImpl");
-        PacketPlayOutPlayerListHeaderFooter = Class.forName("net.minecraft.network.protocol.game.ClientboundTabListPacket");
-        PacketPlayOutChat = getModernClass("net.minecraft.network.protocol.game.ClientboundSystemChatPacket",
-                "net.minecraft.network.protocol.game.ClientboundChatPacket");
-        if (minorVersion < 19) {
-            ChatMessageType = Class.forName("net.minecraft.network.chat.ChatType");
-        }
-
-        // DataWatcher
-        DataWatcher = Class.forName("net.minecraft.network.syncher.SynchedEntityData");
-        DataWatcherItem = Class.forName("net.minecraft.network.syncher.SynchedEntityData$DataItem");
-        DataWatcherObject = Class.forName("net.minecraft.network.syncher.EntityDataAccessor");
-        DataWatcherRegistry = Class.forName("net.minecraft.network.syncher.EntityDataSerializers");
-        DataWatcherSerializer = Class.forName("net.minecraft.network.syncher.EntityDataSerializer");
-
-        // Entities
-        PacketPlayOutSpawnEntityLiving = getModernClass("net.minecraft.network.protocol.game.ClientboundAddMobPacket",
-                "net.minecraft.network.protocol.game.ClientboundAddEntityPacket");
-        PacketPlayOutEntityTeleport = Class.forName("net.minecraft.network.protocol.game.ClientboundTeleportEntityPacket");
-        PacketPlayInUseEntity = Class.forName("net.minecraft.network.protocol.game.ServerboundInteractPacket");
-        PacketPlayInUseEntity$d = Class.forName("net.minecraft.network.protocol.game.ServerboundInteractPacket$InteractionAction");
-        PacketPlayOutEntity = Class.forName("net.minecraft.network.protocol.game.ClientboundMoveEntityPacket");
-        PacketPlayOutEntityDestroy = Class.forName("net.minecraft.network.protocol.game.ClientboundRemoveEntitiesPacket");
-        PacketPlayOutEntityLook = Class.forName("net.minecraft.network.protocol.game.ClientboundMoveEntityPacket$Rot");
-        PacketPlayOutEntityMetadata = Class.forName("net.minecraft.network.protocol.game.ClientboundSetEntityDataPacket");
-        PacketPlayOutNamedEntitySpawn = Class.forName("net.minecraft.network.protocol.game.ClientboundAddPlayerPacket");
-        EnumEntityUseAction = Class.forName("net.minecraft.network.protocol.game.ServerboundInteractPacket$Action");
-        if (minorVersion >= 19) {
-            Registry = Class.forName("net.minecraft.core.IdMap");
-            IRegistry = Class.forName("net.minecraft.core.Registry");
-            ProfilePublicKey = Class.forName("net.minecraft.world.entity.player.ProfilePublicKey");
-            ProfilePublicKey$a = Class.forName("net.minecraft.world.entity.player.ProfilePublicKey$Data");
-        }
-
-        // Player Info
-        PacketPlayOutPlayerInfo = Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket");
-        EnumPlayerInfoAction = Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket$Action");
-        PlayerInfoData = Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket$PlayerUpdate");
-        EnumGamemode = Class.forName("net.minecraft.world.level.GameType");
-
-        // Scoreboard
-        PacketPlayOutScoreboardDisplayObjective = Class.forName("net.minecraft.network.protocol.game.ClientboundSetDisplayObjectivePacket");
-        PacketPlayOutScoreboardObjective = Class.forName("net.minecraft.network.protocol.game.ClientboundSetObjectivePacket");
-        Scoreboard = Class.forName("net.minecraft.world.scores.Scoreboard");
-        PacketPlayOutScoreboardScore = Class.forName("net.minecraft.network.protocol.game.ClientboundSetScorePacket");
-        ScoreboardObjective = Class.forName("net.minecraft.world.scores.Objective");
-        ScoreboardScore = Class.forName("net.minecraft.world.scores.Score");
-        IScoreboardCriteria = Class.forName("net.minecraft.world.scores.criteria.ObjectiveCriteria");
-        EnumScoreboardHealthDisplay = Class.forName("net.minecraft.world.scores.criteria.ObjectiveCriteria$RenderType");
-        EnumScoreboardAction = Class.forName("net.minecraft.server.ServerScoreboard$Method");
-        PacketPlayOutScoreboardTeam = Class.forName("net.minecraft.network.protocol.game.ClientboundSetPlayerTeamPacket");
-        ScoreboardTeam = Class.forName("net.minecraft.world.scores.PlayerTeam");
-        EnumNameTagVisibility = Class.forName("net.minecraft.world.scores.Team$Visibility");
-        EnumTeamPush = Class.forName("net.minecraft.world.scores.Team$CollisionRule");
-        PacketPlayOutScoreboardTeam_PlayerAction = Class.forName("net.minecraft.network.protocol.game.ClientboundSetPlayerTeamPacket$Action");
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/NMSStorage.java

@@ -1,648 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms;
-
-import com.mojang.authlib.GameProfile;
-import io.netty.channel.Channel;
-import me.neznamy.tab.api.ProtocolVersion;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherRegistry;
-import org.bukkit.Bukkit;
-
-import java.lang.reflect.*;
-import java.util.*;
-
-@SuppressWarnings("rawtypes")
-public abstract class NMSStorage {
-
-    //instance of this class
-    private static NMSStorage instance;
-
-    //server package, such as "v1_16_R3"
-    protected final String serverPackage = Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3];
-
-    //server minor version such as "16"
-    protected final int minorVersion = Integer.parseInt(serverPackage.split("_")[1]);
-
-    //another field due to fabric which uses 1.16 package on 1.17 server
-    private final ProtocolVersion serverVersion = ProtocolVersion.fromFriendlyName(Bukkit.getBukkitVersion().split("-")[0]);
-
-    //base
-    protected Class<?> Packet;
-    protected Class<?> NetworkManager;
-    protected Class<?> EntityArmorStand;
-    protected Class<?> World;
-    public Class<?> EnumChatFormat;
-    public Class<?> EntityPlayer;
-    protected Class<?> EntityHuman;
-    protected Class<?> Entity;
-    protected Class<?> EntityLiving;
-    protected Class<?> PlayerConnection;
-    public Field PING;
-    public Field PLAYER_CONNECTION;
-    public Field NETWORK_MANAGER;
-    public Field CHANNEL;
-    public Field EntityHuman_ProfilePublicKey;
-    public Method getHandle;
-    public Method sendPacket;
-    public Method getProfile;
-    public Enum[] EnumChatFormat_values;
-
-    //chat
-    protected Class<?> IChatBaseComponent;
-    protected Class<?> ChatSerializer;
-    public Method ChatSerializer_DESERIALIZE;
-
-    //PacketPlayOutChat
-    protected Class<?> PacketPlayOutChat;
-    public Class<?> ChatMessageType;
-    public Constructor<?> newPacketPlayOutChat;
-    public Enum[] ChatMessageType_values;
-
-    //DataWatcher
-    protected Class<?> DataWatcher;
-    protected Class<?> DataWatcherItem;
-    protected Class<?> DataWatcherObject;
-    protected Class<?> DataWatcherSerializer;
-    public Class<?> DataWatcherRegistry;
-    public Constructor<?> newDataWatcher;
-    public Constructor<?> newDataWatcherObject;
-    public Field DataWatcherItem_TYPE;
-    public Field DataWatcherItem_VALUE;
-    public Field DataWatcherObject_SLOT;
-    public Field DataWatcherObject_SERIALIZER;
-    public Method DataWatcher_REGISTER;
-    private final DataWatcherRegistry registry;
-
-    //PacketPlayOutSpawnEntityLiving
-    public Class<?> PacketPlayOutSpawnEntityLiving;
-    public Constructor<?> newPacketPlayOutSpawnEntityLiving;
-    public Field PacketPlayOutSpawnEntityLiving_ENTITYID;
-    public Field PacketPlayOutSpawnEntityLiving_ENTITYTYPE;
-    public Field PacketPlayOutSpawnEntityLiving_YAW;
-    public Field PacketPlayOutSpawnEntityLiving_PITCH;
-    public Field PacketPlayOutSpawnEntityLiving_UUID;
-    public Field PacketPlayOutSpawnEntityLiving_X;
-    public Field PacketPlayOutSpawnEntityLiving_Y;
-    public Field PacketPlayOutSpawnEntityLiving_Z;
-    public Field PacketPlayOutSpawnEntityLiving_DATAWATCHER;
-    public Method Registry_a;
-    public Object IRegistry_X;
-
-    //PacketPlayOutEntityTeleport
-    public Class<?> PacketPlayOutEntityTeleport;
-    public Constructor<?> newPacketPlayOutEntityTeleport;
-    public Field PacketPlayOutEntityTeleport_ENTITYID;
-    public Field PacketPlayOutEntityTeleport_X;
-    public Field PacketPlayOutEntityTeleport_Y;
-    public Field PacketPlayOutEntityTeleport_Z;
-    public Field PacketPlayOutEntityTeleport_YAW;
-    public Field PacketPlayOutEntityTeleport_PITCH;
-
-    //PacketPlayOutPlayerListHeaderFooter
-    protected Class<?> PacketPlayOutPlayerListHeaderFooter;
-    public Constructor<?> newPacketPlayOutPlayerListHeaderFooter;
-    public Field PacketPlayOutPlayerListHeaderFooter_HEADER;
-    public Field PacketPlayOutPlayerListHeaderFooter_FOOTER;
-
-    //other entity packets
-    public Class<?> PacketPlayInUseEntity;
-    public Class<?> PacketPlayInUseEntity$d;
-    protected Class<?> EnumEntityUseAction;
-    public Field PacketPlayInUseEntity_ENTITY;
-    public Field PacketPlayInUseEntity_ACTION;
-
-    public Class<?> PacketPlayOutEntity;
-    public Field PacketPlayOutEntity_ENTITYID;
-
-    public Class<?> PacketPlayOutEntityDestroy;
-    public Constructor<?> newPacketPlayOutEntityDestroy;
-    public Field PacketPlayOutEntityDestroy_ENTITIES;
-
-    public Class<?> PacketPlayOutEntityLook;
-
-    public Class<?> PacketPlayOutEntityMetadata;
-    public Constructor<?> newPacketPlayOutEntityMetadata;
-    public Field PacketPlayOutEntityMetadata_LIST;
-
-    public Class<?> PacketPlayOutNamedEntitySpawn;
-    public Field PacketPlayOutNamedEntitySpawn_ENTITYID;
-
-    //PacketPlayOutPlayerInfo
-    public Class<?> PacketPlayOutPlayerInfo;
-    protected Class<?> EnumPlayerInfoAction;
-    protected Class<?> PlayerInfoData;
-    protected Class<?> EnumGamemode;
-    protected Class<?> ProfilePublicKey;
-    protected Class<?> ProfilePublicKey$a;
-    public Constructor<?> newPacketPlayOutPlayerInfo;
-    public Constructor<?> newPlayerInfoData;
-    public Field PacketPlayOutPlayerInfo_ACTION;
-    public Field PacketPlayOutPlayerInfo_PLAYERS;
-    public Method PlayerInfoData_getProfile;
-    public Method PlayerInfoData_getLatency;
-    public Method PlayerInfoData_getGamemode;
-    public Method PlayerInfoData_getDisplayName;
-    public Method PlayerInfoData_getProfilePublicKeyRecord;
-    public Method ProfilePublicKey_getRecord;
-    public Enum[] EnumPlayerInfoAction_values;
-    public Enum[] EnumGamemode_values;
-
-    //scoreboard objectives
-    public Class<?> PacketPlayOutScoreboardDisplayObjective;
-    public Class<?> PacketPlayOutScoreboardObjective;
-    protected Class<?> Scoreboard;
-    protected Class<?> PacketPlayOutScoreboardScore;
-    protected Class<?> ScoreboardObjective;
-    protected Class<?> ScoreboardScore;
-    protected Class<?> IScoreboardCriteria;
-    public Class<?> EnumScoreboardHealthDisplay;
-    protected Class<?> EnumScoreboardAction;
-    public Constructor<?> newScoreboardObjective;
-    protected Constructor<?> newScoreboard;
-    public Constructor<?> newScoreboardScore;
-    public Constructor<?> newPacketPlayOutScoreboardDisplayObjective;
-    public Constructor<?> newPacketPlayOutScoreboardObjective;
-    public Constructor<?> newPacketPlayOutScoreboardScore_1_13;
-    public Constructor<?> newPacketPlayOutScoreboardScore_String;
-    public Constructor<?> newPacketPlayOutScoreboardScore;
-    public Field PacketPlayOutScoreboardDisplayObjective_POSITION;
-    public Field PacketPlayOutScoreboardDisplayObjective_OBJECTIVENAME;
-    public Field PacketPlayOutScoreboardObjective_OBJECTIVENAME;
-    public Field PacketPlayOutScoreboardObjective_METHOD;
-    public Field IScoreboardCriteria_self;
-    public Field PacketPlayOutScoreboardObjective_RENDERTYPE;
-    public Field PacketPlayOutScoreboardObjective_DISPLAYNAME;
-    public Method ScoreboardScore_setScore;
-    public Enum[] EnumScoreboardHealthDisplay_values;
-    public Enum[] EnumScoreboardAction_values;
-
-    //PacketPlayOutScoreboardTeam
-    public Class<?> PacketPlayOutScoreboardTeam;
-    protected Class<?> ScoreboardTeam;
-    protected Class<?> EnumNameTagVisibility;
-    protected Class<?> EnumTeamPush;
-    protected Class<?> PacketPlayOutScoreboardTeam_PlayerAction;
-    public Constructor<?> newScoreboardTeam;
-    public Constructor<?> newPacketPlayOutScoreboardTeam;
-    public Field PacketPlayOutScoreboardTeam_NAME;
-    public Field PacketPlayOutScoreboardTeam_ACTION;
-    public Field PacketPlayOutScoreboardTeam_PLAYERS;
-    public Method ScoreboardTeam_getPlayerNameSet;
-    public Method ScoreboardTeam_setNameTagVisibility;
-    public Method ScoreboardTeam_setCollisionRule;
-    public Method ScoreboardTeam_setPrefix;
-    public Method ScoreboardTeam_setSuffix;
-    public Method ScoreboardTeam_setColor;
-    public Method ScoreboardTeam_setAllowFriendlyFire;
-    public Method ScoreboardTeam_setCanSeeFriendlyInvisibles;
-    public Method PacketPlayOutScoreboardTeam_of;
-    public Method PacketPlayOutScoreboardTeam_ofBoolean;
-    public Method PacketPlayOutScoreboardTeam_ofString;
-    public Enum[] EnumNameTagVisibility_values;
-    public Enum[] EnumTeamPush_values;
-    public Enum[] PacketPlayOutScoreboardTeam_PlayerAction_values;
-
-    //other
-    public Object emptyScoreboard;
-    public Object dummyEntity;
-
-    public NMSStorage() throws ReflectiveOperationException {
-        ProtocolVersion.UNKNOWN_SERVER_VERSION.setMinorVersion(minorVersion); //fixing compatibility with forks that set version field value to "Unknown"
-        loadClasses();
-        if (minorVersion >= 7) {
-            NETWORK_MANAGER = getFields(PlayerConnection, NetworkManager).get(0);
-        }
-        if (minorVersion >= 8) {
-            CHANNEL = getFields(NetworkManager, Channel.class).get(0);
-            getProfile = getMethods(EntityHuman, GameProfile.class).get(0);
-            Constructor<?> newEntityArmorStand = EntityArmorStand.getConstructor(World, double.class, double.class, double.class);
-            Method World_getHandle = Class.forName("org.bukkit.craftbukkit." + serverPackage + ".CraftWorld").getMethod("getHandle");
-            dummyEntity = newEntityArmorStand.newInstance(World_getHandle.invoke(Bukkit.getWorlds().get(0)), 0, 0, 0);
-        }
-        PLAYER_CONNECTION = getFields(EntityPlayer, PlayerConnection).get(0);
-        getHandle = Class.forName("org.bukkit.craftbukkit." + serverPackage + ".entity.CraftPlayer").getMethod("getHandle");
-        sendPacket = getMethods(PlayerConnection, void.class, Packet).get(0);
-        EnumChatFormat_values = getEnumValues(EnumChatFormat);
-        registry = new DataWatcherRegistry(this);
-        dataWatcher();
-        entityTeleport();
-        spawnEntityLiving();
-        chat();
-        playerListHeaderFooter();
-        playerInfo();
-        otherEntity();
-        scoreboard();
-        scoreboardTeam();
-        loadNamedFieldsAndMethods();
-    }
-
-    /**
-     * Sets new instance
-     *
-     * @param   instance
-     *          new instance
-     */
-    public static void setInstance(NMSStorage instance) {
-        NMSStorage.instance = instance;
-    }
-
-    /**
-     * Returns instance
-     *
-     * @return  instance
-     */
-    public static NMSStorage getInstance() {
-        return instance;
-    }
-
-    protected void chat() throws ReflectiveOperationException {
-        if (minorVersion >= 12 && minorVersion <= 18) {
-            ChatMessageType_values = getEnumValues(ChatMessageType);
-        }
-        if (minorVersion >= 19) {
-            try {
-                newPacketPlayOutChat = PacketPlayOutChat.getConstructor(IChatBaseComponent, boolean.class);
-            } catch (NoSuchMethodException e) {
-                //1.19.0
-                newPacketPlayOutChat = PacketPlayOutChat.getConstructor(IChatBaseComponent, int.class);
-            }
-        } else if (minorVersion >= 16) {
-            newPacketPlayOutChat = PacketPlayOutChat.getConstructor(IChatBaseComponent, ChatMessageType, UUID.class);
-        } else if (minorVersion >= 12) {
-            newPacketPlayOutChat = PacketPlayOutChat.getConstructor(IChatBaseComponent, ChatMessageType);
-        } else if (minorVersion >= 8) {
-            newPacketPlayOutChat = PacketPlayOutChat.getConstructor(IChatBaseComponent, byte.class);
-        } else if (minorVersion >= 7){
-            newPacketPlayOutChat = PacketPlayOutChat.getConstructor(IChatBaseComponent);
-        }
-    }
-
-    protected void playerInfo() throws ReflectiveOperationException {
-        if (minorVersion < 8) return;
-        newPacketPlayOutPlayerInfo = PacketPlayOutPlayerInfo.getConstructor(EnumPlayerInfoAction, Array.newInstance(EntityPlayer, 0).getClass());
-        newPlayerInfoData = PlayerInfoData.getConstructors()[0];
-        PacketPlayOutPlayerInfo_ACTION = getFields(PacketPlayOutPlayerInfo, EnumPlayerInfoAction).get(0);
-        PacketPlayOutPlayerInfo_PLAYERS = getFields(PacketPlayOutPlayerInfo, List.class).get(0);
-        PlayerInfoData_getProfile = getMethods(PlayerInfoData, GameProfile.class).get(0);
-        PlayerInfoData_getLatency = getMethods(PlayerInfoData, int.class).get(0);
-        PlayerInfoData_getGamemode = getMethods(PlayerInfoData, EnumGamemode).get(0);
-        PlayerInfoData_getDisplayName = getMethods(PlayerInfoData, IChatBaseComponent).get(0);
-        EnumPlayerInfoAction_values = getEnumValues(EnumPlayerInfoAction);
-        EnumGamemode_values = getEnumValues(EnumGamemode);
-        if (minorVersion >= 19) {
-            EntityHuman_ProfilePublicKey = getFields(EntityHuman, ProfilePublicKey).get(0);
-            ProfilePublicKey_getRecord = getMethods(ProfilePublicKey, ProfilePublicKey$a).get(0);
-            PlayerInfoData_getProfilePublicKeyRecord = getMethods(PlayerInfoData, ProfilePublicKey$a).get(0);
-        }
-    }
-
-    protected void spawnEntityLiving() throws ReflectiveOperationException {
-        if (minorVersion >= 17 || serverVersion.getMinorVersion() >= 17) {
-            newPacketPlayOutSpawnEntityLiving = PacketPlayOutSpawnEntityLiving.getConstructor(EntityLiving);
-        } else {
-            newPacketPlayOutSpawnEntityLiving = PacketPlayOutSpawnEntityLiving.getConstructor();
-        }
-        PacketPlayOutSpawnEntityLiving_ENTITYID = getFields(PacketPlayOutSpawnEntityLiving, int.class).get(0);
-        PacketPlayOutSpawnEntityLiving_YAW = getFields(PacketPlayOutSpawnEntityLiving, byte.class).get(0);
-        PacketPlayOutSpawnEntityLiving_PITCH = getFields(PacketPlayOutSpawnEntityLiving, byte.class).get(0);
-        if (minorVersion >= 9) {
-            PacketPlayOutSpawnEntityLiving_UUID = getFields(PacketPlayOutSpawnEntityLiving, UUID.class).get(0);
-            if (minorVersion >= 19) {
-                PacketPlayOutSpawnEntityLiving_X = getFields(PacketPlayOutSpawnEntityLiving, double.class).get(2);
-                PacketPlayOutSpawnEntityLiving_Y = getFields(PacketPlayOutSpawnEntityLiving, double.class).get(3);
-                PacketPlayOutSpawnEntityLiving_Z = getFields(PacketPlayOutSpawnEntityLiving, double.class).get(4);
-            } else {
-                PacketPlayOutSpawnEntityLiving_X = getFields(PacketPlayOutSpawnEntityLiving, double.class).get(0);
-                PacketPlayOutSpawnEntityLiving_Y = getFields(PacketPlayOutSpawnEntityLiving, double.class).get(1);
-                PacketPlayOutSpawnEntityLiving_Z = getFields(PacketPlayOutSpawnEntityLiving, double.class).get(2);
-            }
-        } else {
-            PacketPlayOutSpawnEntityLiving_X = getFields(PacketPlayOutSpawnEntityLiving, int.class).get(2);
-            PacketPlayOutSpawnEntityLiving_Y = getFields(PacketPlayOutSpawnEntityLiving, int.class).get(3);
-            PacketPlayOutSpawnEntityLiving_Z = getFields(PacketPlayOutSpawnEntityLiving, int.class).get(4);
-        }
-        if (minorVersion < 19) {
-            PacketPlayOutSpawnEntityLiving_ENTITYTYPE = getFields(PacketPlayOutSpawnEntityLiving, int.class).get(1);
-        }
-        if (minorVersion <= 14) {
-            PacketPlayOutSpawnEntityLiving_DATAWATCHER = getFields(PacketPlayOutSpawnEntityLiving, DataWatcher).get(0);
-        }
-    }
-
-    protected void entityTeleport() throws ReflectiveOperationException {
-        PacketPlayOutEntityTeleport_ENTITYID = getFields(PacketPlayOutEntityTeleport, int.class).get(0);
-        PacketPlayOutEntityTeleport_YAW = getFields(PacketPlayOutEntityTeleport, byte.class).get(0);
-        PacketPlayOutEntityTeleport_PITCH = getFields(PacketPlayOutEntityTeleport, byte.class).get(1);
-        if (minorVersion >= 17 || serverVersion.getMinorVersion() >= 17) {
-            newPacketPlayOutEntityTeleport = PacketPlayOutEntityTeleport.getConstructor(Entity);
-        } else {
-            newPacketPlayOutEntityTeleport = PacketPlayOutEntityTeleport.getConstructor();
-        }
-        if (minorVersion >= 9) {
-            PacketPlayOutEntityTeleport_X = getFields(PacketPlayOutEntityTeleport, double.class).get(0);
-            PacketPlayOutEntityTeleport_Y = getFields(PacketPlayOutEntityTeleport, double.class).get(1);
-            PacketPlayOutEntityTeleport_Z = getFields(PacketPlayOutEntityTeleport, double.class).get(2);
-        } else {
-            PacketPlayOutEntityTeleport_X = getFields(PacketPlayOutEntityTeleport, int.class).get(1);
-            PacketPlayOutEntityTeleport_Y = getFields(PacketPlayOutEntityTeleport, int.class).get(2);
-            PacketPlayOutEntityTeleport_Z = getFields(PacketPlayOutEntityTeleport, int.class).get(3);
-        }
-    }
-
-    protected void playerListHeaderFooter() throws ReflectiveOperationException {
-        if (minorVersion < 8) return;
-        PacketPlayOutPlayerListHeaderFooter_HEADER = getFields(PacketPlayOutPlayerListHeaderFooter, IChatBaseComponent).get(0);
-        PacketPlayOutPlayerListHeaderFooter_FOOTER = getFields(PacketPlayOutPlayerListHeaderFooter, IChatBaseComponent).get(1);
-        if (minorVersion >= 17 || serverVersion.getMinorVersion() >= 17) {
-            newPacketPlayOutPlayerListHeaderFooter = PacketPlayOutPlayerListHeaderFooter.getConstructor(IChatBaseComponent, IChatBaseComponent);
-        } else {
-            newPacketPlayOutPlayerListHeaderFooter = PacketPlayOutPlayerListHeaderFooter.getConstructor();
-        }
-    }
-
-    protected void otherEntity() throws ReflectiveOperationException {
-        PacketPlayOutEntity_ENTITYID = getFields(PacketPlayOutEntity, int.class).get(0);
-        PacketPlayOutEntityDestroy_ENTITIES = setAccessible(PacketPlayOutEntityDestroy.getDeclaredFields()[0]);
-        newPacketPlayOutEntityMetadata = PacketPlayOutEntityMetadata.getConstructor(int.class, DataWatcher, boolean.class);
-        PacketPlayOutEntityMetadata_LIST = getFields(PacketPlayOutEntityMetadata, List.class).get(0);
-        PacketPlayOutNamedEntitySpawn_ENTITYID = getFields(PacketPlayOutNamedEntitySpawn, int.class).get(0);
-        if (minorVersion >= 7) {
-            PacketPlayInUseEntity_ENTITY = getFields(PacketPlayInUseEntity, int.class).get(0);
-            PacketPlayInUseEntity_ACTION = getFields(PacketPlayInUseEntity, EnumEntityUseAction).get(0);
-        }
-        try {
-            newPacketPlayOutEntityDestroy = PacketPlayOutEntityDestroy.getConstructor(int[].class);
-        } catch (NoSuchMethodException e) {
-            //1.17.0
-            newPacketPlayOutEntityDestroy = PacketPlayOutEntityDestroy.getConstructor(int.class);
-        }
-    }
-
-    protected void dataWatcher() throws ReflectiveOperationException {
-        newDataWatcher = DataWatcher.getConstructors()[0];
-        DataWatcherItem_VALUE = getFields(DataWatcherItem, Object.class).get(0);
-        if (minorVersion >= 9) {
-            newDataWatcherObject = DataWatcherObject.getConstructor(int.class, DataWatcherSerializer);
-            DataWatcherItem_TYPE = getFields(DataWatcherItem, DataWatcherObject).get(0);
-            DataWatcherObject_SLOT = getFields(DataWatcherObject, int.class).get(0);
-            DataWatcherObject_SERIALIZER = getFields(DataWatcherObject, DataWatcherSerializer).get(0);
-        } else {
-            DataWatcherItem_TYPE = getFields(DataWatcherItem, int.class).get(1);
-        }
-    }
-
-    protected void scoreboard() throws ReflectiveOperationException {
-        newScoreboardObjective = ScoreboardObjective.getConstructors()[0];
-        newScoreboard = Scoreboard.getConstructor();
-        emptyScoreboard = newScoreboard.newInstance();
-        newScoreboardScore = ScoreboardScore.getConstructor(Scoreboard, ScoreboardObjective, String.class);
-        newPacketPlayOutScoreboardDisplayObjective = PacketPlayOutScoreboardDisplayObjective.getConstructor(int.class, ScoreboardObjective);
-        PacketPlayOutScoreboardDisplayObjective_POSITION = getFields(PacketPlayOutScoreboardDisplayObjective, int.class).get(0);
-        PacketPlayOutScoreboardDisplayObjective_OBJECTIVENAME = getFields(PacketPlayOutScoreboardDisplayObjective, String.class).get(0);
-        PacketPlayOutScoreboardObjective_OBJECTIVENAME = getFields(PacketPlayOutScoreboardObjective, String.class).get(0);
-        IScoreboardCriteria_self = getFields(IScoreboardCriteria, IScoreboardCriteria).get(0);
-        List<Field> list = getFields(PacketPlayOutScoreboardObjective, int.class);
-        PacketPlayOutScoreboardObjective_METHOD = list.get(list.size()-1);
-        if (minorVersion >= 8) {
-            EnumScoreboardHealthDisplay_values = getEnumValues(EnumScoreboardHealthDisplay);
-            EnumScoreboardAction_values = getEnumValues(EnumScoreboardAction);
-            PacketPlayOutScoreboardObjective_RENDERTYPE = getFields(PacketPlayOutScoreboardObjective, EnumScoreboardHealthDisplay).get(0);
-        }
-        if (minorVersion >= 13) {
-            newPacketPlayOutScoreboardObjective = PacketPlayOutScoreboardObjective.getConstructor(ScoreboardObjective, int.class);
-            newPacketPlayOutScoreboardScore_1_13 = PacketPlayOutScoreboardScore.getConstructor(EnumScoreboardAction, String.class, String.class, int.class);
-            PacketPlayOutScoreboardObjective_DISPLAYNAME = getFields(PacketPlayOutScoreboardObjective, IChatBaseComponent).get(0);
-        } else {
-            newPacketPlayOutScoreboardObjective = PacketPlayOutScoreboardObjective.getConstructor();
-            newPacketPlayOutScoreboardScore_String = PacketPlayOutScoreboardScore.getConstructor(String.class);
-            PacketPlayOutScoreboardObjective_DISPLAYNAME = getFields(PacketPlayOutScoreboardObjective, String.class).get(1);
-            if (minorVersion >= 8) {
-                newPacketPlayOutScoreboardScore = PacketPlayOutScoreboardScore.getConstructor(ScoreboardScore);
-            } else {
-                newPacketPlayOutScoreboardScore = PacketPlayOutScoreboardScore.getConstructor(ScoreboardScore, int.class);
-            }
-        }
-    }
-
-    protected void scoreboardTeam() throws ReflectiveOperationException {
-        newScoreboardTeam = ScoreboardTeam.getConstructor(Scoreboard, String.class);
-        PacketPlayOutScoreboardTeam_NAME = getFields(PacketPlayOutScoreboardTeam, String.class).get(0);
-        PacketPlayOutScoreboardTeam_ACTION = getInstanceFields(PacketPlayOutScoreboardTeam, int.class).get(0);
-        PacketPlayOutScoreboardTeam_PLAYERS = getFields(PacketPlayOutScoreboardTeam, Collection.class).get(0);
-        ScoreboardTeam_getPlayerNameSet = getMethods(ScoreboardTeam, Collection.class).get(0);
-        if (minorVersion >= 8) {
-            EnumNameTagVisibility_values = getEnumValues(EnumNameTagVisibility);
-        }
-        if (minorVersion >= 9) {
-            EnumTeamPush_values = getEnumValues(EnumTeamPush);
-            ScoreboardTeam_setCollisionRule = getMethods(ScoreboardTeam, void.class, EnumTeamPush).get(0);
-        }
-        if (minorVersion >= 13) {
-            ScoreboardTeam_setColor = getMethods(ScoreboardTeam, void.class, EnumChatFormat).get(0);
-        }
-        if (minorVersion >= 17) {
-            PacketPlayOutScoreboardTeam_of = getMethods(PacketPlayOutScoreboardTeam, PacketPlayOutScoreboardTeam, ScoreboardTeam).get(0);
-            PacketPlayOutScoreboardTeam_ofBoolean = getMethods(PacketPlayOutScoreboardTeam, PacketPlayOutScoreboardTeam, ScoreboardTeam, boolean.class).get(0);
-            PacketPlayOutScoreboardTeam_ofString = getMethods(PacketPlayOutScoreboardTeam, PacketPlayOutScoreboardTeam, ScoreboardTeam, String.class, PacketPlayOutScoreboardTeam_PlayerAction).get(0);
-            PacketPlayOutScoreboardTeam_PlayerAction_values = getEnumValues(PacketPlayOutScoreboardTeam_PlayerAction);
-        } else {
-            newPacketPlayOutScoreboardTeam = PacketPlayOutScoreboardTeam.getConstructor(ScoreboardTeam, int.class);
-        }
-    }
-
-    public abstract void loadClasses() throws ClassNotFoundException;
-
-    public abstract void loadNamedFieldsAndMethods() throws ReflectiveOperationException;
-
-    /**
-     * Returns method with specified possible names and parameters. Throws exception if no such method was found
-     *
-     * @param   clazz
-     *          lass to get method from
-     * @param   names
-     *          possible method names
-     * @param   parameterTypes
-     *          parameter types of the method
-     * @return  method with specified name and parameters
-     * @throws  NoSuchMethodException
-     *          if no such method exists
-     */
-    protected Method getMethod(Class<?> clazz, String[] names, Class<?>... parameterTypes) throws NoSuchMethodException {
-        for (String name : names) {
-            try {
-                return getMethod(clazz, name, parameterTypes);
-            } catch (NoSuchMethodException e) {
-                //not the first method in array
-            }
-        }
-        List<String> list = new ArrayList<>();
-        for (Method m : clazz.getMethods()) {
-            if (m.getParameterCount() != parameterTypes.length) continue;
-            Class<?>[] types = m.getParameterTypes();
-            boolean valid = true;
-            for (int i=0; i<types.length; i++) {
-                if (types[i] != parameterTypes[i]) {
-                    valid = false;
-                    break;
-                }
-            }
-            if (valid) list.add(m.getName());
-        }
-        throw new NoSuchMethodException("No method found with possible names " + Arrays.toString(names) + " with parameters " +
-                Arrays.toString(parameterTypes) + " in class " + clazz.getName() + ". Methods with matching parameters: " + list);
-    }
-
-    protected Method getMethod(Class<?> clazz, String name, Class<?>... parameterTypes) throws NoSuchMethodException {
-        List<Method> list = new ArrayList<>();
-        for (Method m : clazz.getMethods()) {
-            if (!m.getName().equals(name) || m.getParameterCount() != parameterTypes.length) continue;
-            Class<?>[] types = m.getParameterTypes();
-            boolean valid = true;
-            for (int i=0; i<types.length; i++) {
-                if (types[i] != parameterTypes[i]) {
-                    valid = false;
-                    break;
-                }
-            }
-            if (valid) list.add(m);
-        }
-        if (!list.isEmpty()) return list.get(0);
-        throw new NoSuchMethodException("No method found with name " + name + " in class " + clazz.getName() + " with parameters " + Arrays.toString(parameterTypes));
-    }
-
-    protected List<Method> getMethods(Class<?> clazz, Class<?> returnType, Class<?>... parameterTypes){
-        List<Method> list = new ArrayList<>();
-        for (Method m : clazz.getDeclaredMethods()) {
-            if (m.getReturnType() != returnType || m.getParameterCount() != parameterTypes.length || !Modifier.isPublic(m.getModifiers())) continue;
-            Class<?>[] types = m.getParameterTypes();
-            boolean valid = true;
-            for (int i=0; i<types.length; i++) {
-                if (types[i] != parameterTypes[i]) {
-                    valid = false;
-                    break;
-                }
-            }
-            if (valid) list.add(m);
-        }
-        return list;
-    }
-
-    /**
-     * Returns all fields of class with defined class type
-     *
-     * @param   clazz
-     *          class to check fields of
-     * @param   type
-     *          field type to check for
-     * @return  list of all fields with specified class type
-     */
-    protected List<Field> getFields(Class<?> clazz, Class<?> type){
-        if (clazz == null) throw new IllegalArgumentException("Source class cannot be null");
-        List<Field> list = new ArrayList<>();
-        for (Field field : clazz.getDeclaredFields()) {
-            if (field.getType() == type) {
-                list.add(setAccessible(field));
-            }
-        }
-        return list;
-    }
-
-    /**
-     * Returns all instance fields of class with defined class type
-     *
-     * @param   clazz
-     *          class to check fields of
-     * @param   type
-     *          field type to check for
-     * @return  list of all fields with specified class type
-     */
-    public List<Field> getInstanceFields(Class<?> clazz, Class<?> type){
-        if (clazz == null) throw new IllegalArgumentException("Source class cannot be null");
-        List<Field> list = new ArrayList<>();
-        for (Field field : clazz.getDeclaredFields()) {
-            if (field.getType() == type && !Modifier.isStatic(field.getModifiers())) {
-                list.add(setAccessible(field));
-            }
-        }
-        return list;
-    }
-
-    /**
-     * Returns field with specified name and makes it accessible
-     *
-     * @param   clazz
-     *          class to get field from
-     * @param   name
-     *          field name
-     * @return  accessible field with defined name
-     * @throws  NoSuchFieldException
-     *          if field was not found
-     */
-    protected Field getField(Class<?> clazz, String name) throws NoSuchFieldException {
-        for (Field f : clazz.getDeclaredFields()) {
-            if (f.getName().equals(name) || (f.getName().split("_").length == 3 && f.getName().split("_")[2].equals(name))) {
-                return setAccessible(f);
-            }
-        }
-        throw new NoSuchFieldException("Field \"" + name + "\" was not found in class " + clazz.getName());
-    }
-
-    protected Field getField(Class<?> clazz, String... potentialNames) throws NoSuchFieldException {
-        for (String name : potentialNames) {
-            try {
-                return getField(clazz, name);
-            } catch (NoSuchFieldException e) {
-                //not the first field name from array
-            }
-        }
-        throw new NoSuchFieldException("No field found in class " + clazz.getName() + " with potential names " + Arrays.toString(potentialNames));
-    }
-
-    protected Enum[] getEnumValues(Class<?> enumClass) {
-        if (enumClass == null) throw new IllegalArgumentException("Class cannot be null");
-        if (!enumClass.isEnum()) throw new IllegalArgumentException(enumClass.getName() + " is not an enum class");
-        try {
-            return (Enum[]) enumClass.getMethod("values").invoke(null);
-        } catch (ReflectiveOperationException e) {
-            //this should never happen
-            return new Enum[0];
-        }
-    }
-
-    public int getMinorVersion() {
-        return minorVersion;
-    }
-
-    public void setField(Object obj, Field field, Object value) throws IllegalAccessException {
-        field.set(obj, value);
-    }
-
-    public DataWatcherRegistry getDataWatcherRegistry() {
-        return registry;
-    }
-
-    public <T extends AccessibleObject> T setAccessible(T o) {
-        o.setAccessible(true);
-        return o;
-    }
-
-    /**
-     * Gets values of all static fields in a class
-     *
-     * @param   clazz
-     *          class to return field values from
-     * @return  map of values
-     */
-    public Map<String, Object> getStaticFields(Class<?> clazz){
-        Map<String, Object> fields = new HashMap<>();
-        for (Field field : clazz.getDeclaredFields()) {
-            if (Modifier.isStatic(field.getModifiers())) {
-                setAccessible(field);
-                try {
-                    fields.put(field.getName(), field.get(null));
-                } catch (IllegalAccessException e) {
-                    //this will never happen
-                }
-            }
-        }
-        return fields;
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/PacketPlayOutEntityDestroy.java

@@ -1,23 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms;
-
-import java.util.Arrays;
-
-import me.neznamy.tab.api.protocol.TabPacket;
-
-public class PacketPlayOutEntityDestroy implements TabPacket {
-
-    private final int[] entities;
-
-    public PacketPlayOutEntityDestroy(int... entities) {
-        this.entities = entities;
-    }
-
-    @Override
-    public String toString() {
-        return String.format("PacketPlayOutEntityDestroy{entities=%s}", Arrays.toString(entities));
-    }
-
-    public int[] getEntities() {
-        return entities;
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/PacketPlayOutEntityMetadata.java

@@ -1,31 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms;
-
-import me.neznamy.tab.api.protocol.TabPacket;
-import me.neznamy.tab.api.util.Preconditions;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
-
-public class PacketPlayOutEntityMetadata implements TabPacket {
-
-    private final int entityId;
-
-    private final DataWatcher dataWatcher;
-
-    public PacketPlayOutEntityMetadata(int entityId, DataWatcher dataWatcher) {
-        Preconditions.checkNotNull(dataWatcher, "data watcher");
-        this.entityId = entityId;
-        this.dataWatcher = dataWatcher;
-    }
-
-    @Override
-    public String toString() {
-        return String.format("PacketPlayOutEntityMetadata{entityId=%s,dataWatcher=%s}", entityId, dataWatcher);
-    }
-
-    public int getEntityId() {
-        return entityId;
-    }
-
-    public DataWatcher getDataWatcher() {
-        return dataWatcher;
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/PacketPlayOutEntityTeleport.java

@@ -1,32 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms;
-
-import me.neznamy.tab.api.util.Preconditions;
-import org.bukkit.Location;
-
-import me.neznamy.tab.api.protocol.TabPacket;
-
-public class PacketPlayOutEntityTeleport implements TabPacket {
-
-    private final int entityId;
-
-    private final Location location;
-
-    public PacketPlayOutEntityTeleport(int entityId, Location location) {
-        Preconditions.checkNotNull(location, "location");
-        this.entityId = entityId;
-        this.location = location;
-    }
-
-    @Override
-    public String toString() {
-        return String.format("PacketPlayOutEntityTeleport{entityId=%s,location=%s}", entityId, location);
-    }
-
-    public int getEntityId() {
-        return entityId;
-    }
-
-    public Location getLocation() {
-        return location;
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/PacketPlayOutSpawnEntityLiving.java

@@ -1,60 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms;
-
-import java.util.UUID;
-
-import me.neznamy.tab.api.util.Preconditions;
-import org.bukkit.Location;
-import org.bukkit.entity.EntityType;
-
-import me.neznamy.tab.api.protocol.TabPacket;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
-
-public class PacketPlayOutSpawnEntityLiving implements TabPacket {
-
-    private final int entityId;
-
-    private final UUID uuid;
-
-    private final EntityType entityType;
-
-    private final Location location;
-
-    private final DataWatcher dataWatcher;
-
-    public PacketPlayOutSpawnEntityLiving(int entityId, UUID uuid, EntityType entityType, Location location, DataWatcher dataWatcher) {
-        Preconditions.checkNotNull(uuid, "uuid");
-        Preconditions.checkNotNull(entityType, "entityType");
-        Preconditions.checkNotNull(location, "location");
-        this.entityId = entityId;
-        this.uuid = uuid;
-        this.entityType = entityType;
-        this.location = location;
-        this.dataWatcher = dataWatcher;
-    }
-
-    @Override
-    public String toString() {
-        return String.format("PacketPlayOutSpawnEntityLiving{entityId=%s,uuid=%s,entityType=%s,location=%s,dataWatcher=%s}", 
-                entityId, uuid, entityType, location, dataWatcher);
-    }
-
-    public int getEntityId() {
-        return entityId;
-    }
-
-    public UUID getUniqueId() {
-        return uuid;
-    }
-
-    public EntityType getEntityType() {
-        return entityType;
-    }
-
-    public Location getLocation() {
-        return location;
-    }
-
-    public DataWatcher getDataWatcher() {
-        return dataWatcher;
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/datawatcher/DataWatcher.java

@@ -1,23 +1,55 @@
 package me.neznamy.tab.platforms.bukkit.nms.datawatcher;
 
+import lombok.Getter;
+import lombok.NonNull;
+import lombok.ToString;
+import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
-import me.neznamy.tab.api.util.Preconditions;
-import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
-
 /**
  * A class representing the n.m.s.DataWatcher class to make work with it much easier
  */
+@ToString
 public class DataWatcher {
 
-    //DataWatcher data
+    /** NMS Fields */
+    public static Class<?> CLASS;
+    public static Constructor<?> CONSTRUCTOR;
+    public static Method REGISTER;
+    public static Method markDirty;
+    public static Method packDirty;
+
+    public static Class<?> DataValue;
+    public static Field DataValue_POSITION;
+    public static Field DataValue_VALUE;
+    
+    /** Watched data */
     private final Map<Integer, DataWatcherItem> dataValues = new HashMap<>();
 
-    //a helper for easier data write
-    private final DataWatcherHelper helper = new DataWatcherHelper(this);
+    /** Helper for easier data write */
+    @Getter private final DataWatcherHelper helper = new DataWatcherHelper(this);
 
+    /**
+     * Loads all required Fields and throws Exception if something went wrong
+     *
+     * @param   nms
+     *          NMS storage reference
+     */
+    public static void load(NMSStorage nms) {
+        CONSTRUCTOR = CLASS.getConstructors()[0];
+        if (nms.is1_19_3Plus()) {
+            markDirty = nms.getMethods(CLASS, void.class, DataWatcherObject.CLASS).get(0);
+            DataValue_POSITION = nms.getFields(DataValue, int.class).get(0);
+            DataValue_VALUE = nms.getFields(DataValue, Object.class).get(0);
+        }
+    }
+    
     /**
      * Sets value into data values
      *
@@ -26,9 +58,7 @@ public class DataWatcher {
      * @param   value
      *          value
      */
-    public void setValue(DataWatcherObject type, Object value){
-        Preconditions.checkNotNull(type, "type");
-        Preconditions.checkNotNull(value, "value");
+    public void setValue(@NonNull DataWatcherObject type, @NonNull Object value) {
         dataValues.put(type.getPosition(), new DataWatcherItem(type, value));
     }
 
@@ -53,15 +83,6 @@ public class DataWatcher {
         return dataValues.get(position);
     }
 
-    /**
-     * Returns helper created by this instance
-     *
-     * @return  data write helper
-     */
-    public DataWatcherHelper helper() {
-        return helper;
-    }
-
     /**
      * Converts the class into an instance of NMS.DataWatcher
      *
@@ -69,23 +90,18 @@ public class DataWatcher {
      * @throws  ReflectiveOperationException
      *          if thrown by reflective operation
      */
-    public Object toNMS() throws ReflectiveOperationException {
+    public Object build() throws ReflectiveOperationException {
         NMSStorage nms = NMSStorage.getInstance();
         Object nmsWatcher;
-        if (nms.newDataWatcher.getParameterCount() == 1) { //1.7+
-            Object[] args = new Object[] {null};
-            nmsWatcher = nms.newDataWatcher.newInstance(args);
+        if (CONSTRUCTOR.getParameterCount() == 1) { //1.7+
+            nmsWatcher = CONSTRUCTOR.newInstance(new Object[] {null});
         } else {
-            nmsWatcher = nms.newDataWatcher.newInstance();
+            nmsWatcher = CONSTRUCTOR.newInstance();
         }
         for (DataWatcherItem item : dataValues.values()) {
-            Object position;
-            if (nms.getMinorVersion() >= 9) {
-                position = nms.newDataWatcherObject.newInstance(item.getType().getPosition(), item.getType().getClassType());
-            } else {
-                position = item.getType().getPosition();
-            }
-            nms.DataWatcher_REGISTER.invoke(nmsWatcher, position, item.getValue());
+            Object nmsObject = item.getType().build();
+            REGISTER.invoke(nmsWatcher, nmsObject, item.getValue());
+            if (nms.is1_19_3Plus()) markDirty.invoke(nmsWatcher, nmsObject);
         }
         return nmsWatcher;
     }
@@ -100,8 +116,7 @@ public class DataWatcher {
      *          if thrown by reflective operation
      */
     @SuppressWarnings("unchecked")
-    public static DataWatcher fromNMS(Object nmsWatcher) throws ReflectiveOperationException {
-        Preconditions.checkNotNull(nmsWatcher, "nmsWatcher");
+    public static DataWatcher fromNMS(@NonNull Object nmsWatcher) throws ReflectiveOperationException {
         DataWatcher watcher = new DataWatcher();
         List<Object> items = (List<Object>) nmsWatcher.getClass().getMethod("c").invoke(nmsWatcher);
         if (items != null) {

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/datawatcher/DataWatcherHelper.java

@@ -1,10 +1,10 @@
 package me.neznamy.tab.platforms.bukkit.nms.datawatcher;
 
+import lombok.AllArgsConstructor;
 import me.neznamy.tab.api.ProtocolVersion;
 import me.neznamy.tab.api.TabAPI;
 import me.neznamy.tab.api.chat.IChatBaseComponent;
-import me.neznamy.tab.platforms.bukkit.BukkitPacketBuilder;
-import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
 import me.neznamy.tab.shared.TAB;
 
 import java.util.Optional;
@@ -12,28 +12,22 @@ import java.util.Optional;
 /**
  * A class to help to assign DataWatcher items as positions often change per-version
  */
+@AllArgsConstructor
 public class DataWatcherHelper {
 
-    //position of armor stand flags
+    /** NMS Fields */
+    public static Class<?> DataWatcherRegistry;
+    public static Class<?> DataWatcherSerializer;
+    public static Object DataWatcherSerializer_BYTE;
+    public static Object DataWatcherSerializer_FLOAT;
+    public static Object DataWatcherSerializer_STRING;
+    public static Object DataWatcherSerializer_OPTIONAL_COMPONENT;
+    public static Object DataWatcherSerializer_BOOLEAN;
+
+    /** Instance fields */
     private final int armorStandFlagsPosition = getArmorStandFlagsPosition();
-
-    //original DataWatcher to write to
     private final DataWatcher data;
 
-    //data watcher registry
-    private final DataWatcherRegistry registry;
-
-    /**
-     * Constructs new instance of this class with given parent
-     *
-     * @param   data
-     *          data to write to
-     */
-    public DataWatcherHelper(DataWatcher data) {
-        this.data = data;
-        this.registry = NMSStorage.getInstance().getDataWatcherRegistry();
-    }
-
     /**
      * Returns armor stand flags position based on server version
      *
@@ -53,7 +47,7 @@ public class DataWatcherHelper {
             //1.10.x - 1.13.x
             return 11;
         } else {
-            //1.8.1 - 1.9.x
+            //1.8.x - 1.9.x
             return 10;
         }
     }
@@ -65,7 +59,7 @@ public class DataWatcherHelper {
      *          flags to write
      */
     public void setEntityFlags(byte flags) {
-        data.setValue(new DataWatcherObject(0, registry.getByte()), flags);
+        data.setValue(new DataWatcherObject(0, DataWatcherSerializer_BYTE), flags);
     }
 
     /**
@@ -78,17 +72,14 @@ public class DataWatcherHelper {
      */
     public void setCustomName(String customName, ProtocolVersion clientVersion) {
         if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 13) {
-            try {
-                data.setValue(new DataWatcherObject(2, registry.getOptionalComponent()), Optional.ofNullable(((BukkitPacketBuilder)TAB.getInstance().getPlatform().getPacketBuilder()).toNMSComponent(IChatBaseComponent.optimizedComponent(customName), clientVersion)));
-            } catch (ReflectiveOperationException e) {
-                TAB.getInstance().getErrorManager().printError("Failed to create component", e);
-            }
-        } else if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 8){
-            data.setValue(new DataWatcherObject(2, registry.getString()), customName);
+            data.setValue(new DataWatcherObject(2, DataWatcherSerializer_OPTIONAL_COMPONENT),
+                    Optional.ofNullable(NMSStorage.getInstance().toNMSComponent(IChatBaseComponent.optimizedComponent(customName), clientVersion)));
+        } else if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 8) {
+            data.setValue(new DataWatcherObject(2, DataWatcherSerializer_STRING), customName);
         } else {
             //name length is limited to 64 characters on <1.8
             String cutName = (customName.length() > 64 ? customName.substring(0, 64) : customName);
-            if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 6){
+            if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 6) {
                 data.setValue(new DataWatcherObject(10, null), cutName);
             } else {
                 data.setValue(new DataWatcherObject(5, null), cutName);
@@ -104,7 +95,7 @@ public class DataWatcherHelper {
      */
     public void setCustomNameVisible(boolean visible) {
         if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 9) {
-            data.setValue(new DataWatcherObject(3, registry.getBoolean()), visible);
+            data.setValue(new DataWatcherObject(3, DataWatcherSerializer_BOOLEAN), visible);
         } else {
             data.setValue(new DataWatcherObject(3, null), (byte)(visible?1:0));
         }
@@ -118,7 +109,7 @@ public class DataWatcherHelper {
      */
     public void setHealth(float health) {
         if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 6) {
-            data.setValue(new DataWatcherObject(6, registry.getFloat()), health);
+            data.setValue(new DataWatcherObject(6, DataWatcherSerializer_FLOAT), health);
         } else {
             data.setValue(new DataWatcherObject(16, null), (int)health);
         }
@@ -131,7 +122,7 @@ public class DataWatcherHelper {
      *          flags to write
      */
     public void setArmorStandFlags(byte flags) {
-        data.setValue(new DataWatcherObject(armorStandFlagsPosition, registry.getByte()), flags);
+        data.setValue(new DataWatcherObject(armorStandFlagsPosition, DataWatcherSerializer_BYTE), flags);
     }
 
     /**

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/datawatcher/DataWatcherItem.java

@@ -1,32 +1,41 @@
 package me.neznamy.tab.platforms.bukkit.nms.datawatcher;
 
+import lombok.Data;
 import me.neznamy.tab.api.TabAPI;
-import me.neznamy.tab.api.util.Preconditions;
-import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
 
+import java.lang.reflect.Field;
+
+/**
+ * Class representing NMS Data Watcher Item
+ */
+@Data
 public class DataWatcherItem {
-    
-    //type of value (position + data type (1.9+))
+
+    /** NMS Fields */
+    public static Class<?> CLASS;
+    public static Field TYPE;
+    public static Field VALUE;
+
+    /** Instance fields */
     private final DataWatcherObject type;
-    
-    //actual data value
     private final Object value;
-    
+
     /**
-     * Constructs new instance of the object with given parameters
+     * Loads all required Fields
      *
-     * @param   type
-     *          value type
-     * @param   value
-     *          value
+     * @param   nms
+     *          NMS storage reference
      */
-    public DataWatcherItem(DataWatcherObject type, Object value){
-        Preconditions.checkNotNull(type, "type");
-        Preconditions.checkNotNull(value, "value");
-        this.type = type;
-        this.value = value;
+    public static void load(NMSStorage nms) {
+        VALUE = nms.getFields(CLASS, Object.class).get(0);
+        if (nms.getMinorVersion() >= 9) {
+            TYPE = nms.getFields(CLASS, DataWatcherObject.CLASS).get(0);
+        } else {
+            TYPE = nms.getFields(CLASS, int.class).get(1);
+        }
     }
-    
+
     /**
      * Returns and instance of this class from given NMS item
      *
@@ -37,20 +46,14 @@ public class DataWatcherItem {
      *          if thrown by reflective operation
      */
     public static DataWatcherItem fromNMS(Object nmsItem) throws ReflectiveOperationException {
-        NMSStorage nms = NMSStorage.getInstance();
+        Object value = VALUE.get(nmsItem);
+        DataWatcherObject object;
         if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 9) {
-            Object nmsObject = nms.DataWatcherItem_TYPE.get(nmsItem);
-            return new DataWatcherItem(new DataWatcherObject(nms.DataWatcherObject_SLOT.getInt(nmsObject), nms.DataWatcherObject_SERIALIZER.get(nmsObject)), nms.DataWatcherItem_VALUE.get(nmsItem));
+            Object nmsObject = TYPE.get(nmsItem);
+            object = new DataWatcherObject(DataWatcherObject.SLOT.getInt(nmsObject), DataWatcherObject.SERIALIZER.get(nmsObject));
         } else {
-            return new DataWatcherItem(new DataWatcherObject(nms.DataWatcherItem_TYPE.getInt(nmsItem), null), nms.DataWatcherItem_VALUE.get(nmsItem));
+            object = new DataWatcherObject(TYPE.getInt(nmsItem), null);
         }
-    }
-
-    public DataWatcherObject getType() {
-        return type;
-    }
-
-    public Object getValue() {
-        return value;
+        return new DataWatcherItem(object, value);
     }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/datawatcher/DataWatcherObject.java

@@ -1,34 +1,55 @@
 package me.neznamy.tab.platforms.bukkit.nms.datawatcher;
 
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+
 /**
  * A class representing the n.m.s.DataWatcherObject class to make work with it much easier
  */
+@Data @AllArgsConstructor
 public class DataWatcherObject {
 
-    //position in DataWatcher
-    private final int position;
+    /** NMS Fields */
+    public static Class<?> CLASS;
+    public static Constructor<?> CONSTRUCTOR;
+    public static Field SLOT;
+    public static Field SERIALIZER;
     
-    //value class type used since 1.9
-    private final Object classType;
+    /** Instance fields */
+    private final int position;
+    private final Object serializer;
 
     /**
-     * Constructs a new instance of this class with given parameters
+     * Loads all required Fields and throws Exception if something went wrong
      *
-     * @param   position
-     *          position in DataWatcher
-     * @param   classType
-     *          value class type
+     * @param   nms
+     *          NMS storage reference
+     * @throws  NoSuchMethodException
+     *          If something fails
      */
-    public DataWatcherObject(int position, Object classType){
-        this.position = position;
-        this.classType = classType;
+    public static void load(NMSStorage nms) throws NoSuchMethodException {
+        if (nms.getMinorVersion() < 9) return;
+        CONSTRUCTOR = CLASS.getConstructor(int.class, DataWatcherHelper.DataWatcherSerializer);
+        SLOT = nms.getFields(CLASS, int.class).get(0);
+        SERIALIZER = nms.getFields(CLASS, DataWatcherHelper.DataWatcherSerializer).get(0);
     }
 
-    public int getPosition() {
-        return position;
-    }
-
-    public Object getClassType() {
-        return classType;
+    /**
+     * Converts the object into NMS object
+     *
+     * @return  NMS object
+     * @throws  ReflectiveOperationException
+     *          If thrown by reflective operation
+     */
+    public Object build() throws ReflectiveOperationException {
+        if (NMSStorage.getInstance().getMinorVersion() >= 9) {
+            return DataWatcherObject.CONSTRUCTOR.newInstance(position, serializer);
+        } else {
+            return position;
+        }
     }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/datawatcher/DataWatcherRegistry.java

@@ -1,65 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms.datawatcher;
-
-import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
-
-import java.util.Map;
-
-/**
- * A class representing the n.m.s.DataWatcherRegistry class to make work with it much easier
- */
-public class DataWatcherRegistry {
-
-    private Object registryByte;
-    private Object registryFloat;
-    private Object registryString;
-    private Object registryOptionalIChatBaseComponent;
-    private Object registryBoolean;
-
-    /**
-     * Initializes required NMS classes and fields
-     */
-    public DataWatcherRegistry(NMSStorage nms) {
-        if (nms.getMinorVersion() >= 9) {
-            Map<String, Object> fields = nms.getStaticFields(nms.DataWatcherRegistry);
-            if (fields.containsKey("a")) {
-                // Bukkit mapping
-                registryByte = fields.get("a");
-                registryFloat = fields.get("c");
-                registryString = fields.get("d");
-                if (nms.getMinorVersion() >= 13) {
-                    registryOptionalIChatBaseComponent = fields.get("f");
-                    registryBoolean = fields.get("i");
-                } else {
-                    registryBoolean = fields.get("h");
-                }
-            } else {
-                // Mojang mapping
-                registryByte = fields.get("BYTE");
-                registryFloat = fields.get("FLOAT");
-                registryString = fields.get("STRING");
-                registryOptionalIChatBaseComponent = fields.get("OPTIONAL_COMPONENT");
-                registryBoolean = fields.get("BOOLEAN");
-            }
-        }
-    }
-
-    public Object getByte() {
-        return registryByte;
-    }
-
-    public Object getFloat() {
-        return registryFloat;
-    }
-
-    public Object getString() {
-        return registryString;
-    }
-
-    public Object getOptionalComponent() {
-        return registryOptionalIChatBaseComponent;
-    }
-
-    public Object getBoolean() {
-        return registryBoolean;
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/storage/nms/BukkitLegacyNMSStorage.java

@@ -0,0 +1,164 @@
+package me.neznamy.tab.platforms.bukkit.nms.storage.nms;
+
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutEntityDestroyStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutEntityMetadataStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutEntityTeleportStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutSpawnEntityLivingStorage;
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherHelper;
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherItem;
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherObject;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.*;
+
+import java.util.Arrays;
+
+/**
+ * NMS loader for Minecraft 1.5.2 - 1.16.5 using Bukkit mapping.
+ */
+@SuppressWarnings({"unchecked", "rawtypes"})
+public class BukkitLegacyNMSStorage extends NMSStorage {
+
+    public BukkitLegacyNMSStorage() throws ReflectiveOperationException {}
+
+    /**
+     * Returns class with given potential names in same order
+     *
+     * @param   names
+     *          possible class names
+     * @return  class for specified names
+     * @throws  ClassNotFoundException
+     *          if class does not exist
+     */
+    private Class<?> getLegacyClass(String... names) throws ClassNotFoundException {
+        for (String name : names) {
+            try {
+                return getLegacyClass(name);
+            } catch (ClassNotFoundException e) {
+                //not the first class name in array
+            }
+        }
+        throw new ClassNotFoundException("No class found with possible names " + Arrays.toString(names));
+    }
+
+    /**
+     * Returns class from given name
+     *
+     * @param   name
+     *          class name
+     * @return  class from given name
+     * @throws  ClassNotFoundException
+     *          if class was not found
+     */
+    public Class<?> getLegacyClass(String name) throws ClassNotFoundException {
+        return Class.forName("net.minecraft.server." + serverPackage + "." + name);
+    }
+
+    @Override
+    public void loadNamedFieldsAndMethods() throws ReflectiveOperationException {
+        (PING = EntityPlayer.getDeclaredField("ping")).setAccessible(true);
+        PacketPlayOutScoreboardScoreStorage.ScoreboardScore_setScore = getMethod(PacketPlayOutScoreboardScoreStorage.ScoreboardScore, new String[] {"setScore", "c"}, int.class); // 1.5.1+, 1.5
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setAllowFriendlyFire = getMethod(PacketPlayOutScoreboardTeamStorage.ScoreboardTeam, new String[] {"setAllowFriendlyFire", "a"}, boolean.class); // 1.5.1+, 1.5
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setCanSeeFriendlyInvisibles = getMethod(PacketPlayOutScoreboardTeamStorage.ScoreboardTeam, new String[] {"setCanSeeFriendlyInvisibles", "b"}, boolean.class); // 1.5.1+, 1.5
+        if (minorVersion >= 7) {
+            ChatSerializer_DESERIALIZE = ChatSerializer.getMethod("a", String.class);
+        }
+        if (minorVersion >= 8) {
+            PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setNameTagVisibility = getMethod(PacketPlayOutScoreboardTeamStorage.ScoreboardTeam, new String[] {"setNameTagVisibility", "a"}, PacketPlayOutScoreboardTeamStorage.EnumNameTagVisibility); // {1.8.1+, 1.8}
+        }
+        if (minorVersion >= 9) {
+            DataWatcher.REGISTER = DataWatcher.CLASS.getMethod("register", DataWatcherObject.CLASS, Object.class);
+            DataWatcherHelper.DataWatcherSerializer_BYTE = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("a").get(null);
+            DataWatcherHelper.DataWatcherSerializer_FLOAT = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("c").get(null);
+            DataWatcherHelper.DataWatcherSerializer_STRING = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("d").get(null);
+            if (getMinorVersion() >= 13) {
+                DataWatcherHelper.DataWatcherSerializer_OPTIONAL_COMPONENT = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("f").get(null);
+                DataWatcherHelper.DataWatcherSerializer_BOOLEAN = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("i").get(null);
+            } else {
+                DataWatcherHelper.DataWatcherSerializer_BOOLEAN = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("h").get(null);
+            }
+        } else {
+            DataWatcher.REGISTER = DataWatcher.CLASS.getMethod("a", int.class, Object.class);
+        }
+        if (minorVersion >= 13) {
+            PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setPrefix = PacketPlayOutScoreboardTeamStorage.ScoreboardTeam.getMethod("setPrefix", IChatBaseComponent);
+            PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setSuffix = PacketPlayOutScoreboardTeamStorage.ScoreboardTeam.getMethod("setSuffix", IChatBaseComponent);
+        } else {
+            PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setPrefix = getMethod(PacketPlayOutScoreboardTeamStorage.ScoreboardTeam, new String[] {"setPrefix", "b"}, String.class); // 1.5.1+, 1.5
+            PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setSuffix = getMethod(PacketPlayOutScoreboardTeamStorage.ScoreboardTeam, new String[] {"setSuffix", "c"}, String.class); // 1.5.1+, 1.5
+        }
+    }
+
+    @Override
+    public void loadClasses() throws ClassNotFoundException {
+        EntityHuman = getLegacyClass("EntityHuman");
+        World = getLegacyClass("World");
+        Packet = getLegacyClass("Packet");
+        EnumChatFormat = (Class<Enum>) getLegacyClass("EnumChatFormat");
+        EntityPlayer = getLegacyClass("EntityPlayer");
+        Entity = getLegacyClass("Entity");
+        EntityLiving = getLegacyClass("EntityLiving");
+        PlayerConnection = getLegacyClass("PlayerConnection");
+        PacketPlayOutChatStorage.CLASS = getLegacyClass("PacketPlayOutChat", "Packet3Chat");
+        NetworkManager = getLegacyClass("NetworkManager");
+        if (minorVersion >= 7) {
+            IChatBaseComponent = getLegacyClass("IChatBaseComponent");
+            ChatSerializer = getLegacyClass("IChatBaseComponent$ChatSerializer", "ChatSerializer");
+        }
+        if (minorVersion >= 8) {
+            PacketPlayOutPlayerListHeaderFooterStorage.CLASS = getLegacyClass("PacketPlayOutPlayerListHeaderFooter");
+            EntityArmorStand = getLegacyClass("EntityArmorStand");
+        }
+        if (minorVersion >= 12) {
+            PacketPlayOutChatStorage.ChatMessageTypeClass = (Class<Enum>) getLegacyClass("ChatMessageType");
+        }
+
+        // DataWatcher
+        DataWatcher.CLASS = getLegacyClass("DataWatcher");
+        DataWatcherItem.CLASS = getLegacyClass("DataWatcher$Item", "DataWatcher$WatchableObject", "WatchableObject");
+        if (minorVersion >= 9) {
+            DataWatcherObject.CLASS = getLegacyClass("DataWatcherObject");
+            DataWatcherHelper.DataWatcherRegistry = getLegacyClass("DataWatcherRegistry");
+            DataWatcherHelper.DataWatcherSerializer = getLegacyClass("DataWatcherSerializer");
+        }
+
+        // Entities
+        PacketPlayOutSpawnEntityLivingStorage.CLASS = getLegacyClass("PacketPlayOutSpawnEntityLiving", "Packet24MobSpawn");
+        PacketPlayOutEntityTeleportStorage.CLASS = getLegacyClass("PacketPlayOutEntityTeleport", "Packet34EntityTeleport");
+        PacketPlayInUseEntity = getLegacyClass("PacketPlayInUseEntity", "Packet7UseEntity");
+        PacketPlayOutEntity = getLegacyClass("PacketPlayOutEntity", "Packet30Entity");
+        PacketPlayOutEntityDestroyStorage.CLASS = getLegacyClass("PacketPlayOutEntityDestroy", "Packet29DestroyEntity");
+        PacketPlayOutEntityLook = getLegacyClass("PacketPlayOutEntity$PacketPlayOutEntityLook", "PacketPlayOutEntityLook", "Packet32EntityLook");
+        PacketPlayOutEntityMetadataStorage.CLASS = getLegacyClass("PacketPlayOutEntityMetadata", "Packet40EntityMetadata");
+        PacketPlayOutNamedEntitySpawn = getLegacyClass("PacketPlayOutNamedEntitySpawn", "Packet20NamedEntitySpawn");
+        if (minorVersion >= 7) {
+            EnumEntityUseAction = (Class<Enum>) getLegacyClass("PacketPlayInUseEntity$EnumEntityUseAction", "EnumEntityUseAction");
+        }
+
+        // Player Info
+        if (minorVersion >= 8) {
+            PacketPlayOutPlayerInfoStorage.CLASS = getLegacyClass("PacketPlayOutPlayerInfo");
+            PacketPlayOutPlayerInfoStorage.EnumPlayerInfoActionClass = (Class<Enum>) getLegacyClass("PacketPlayOutPlayerInfo$EnumPlayerInfoAction", "EnumPlayerInfoAction");
+            PacketPlayOutPlayerInfoStorage.PlayerInfoDataStorage.CLASS = getLegacyClass("PacketPlayOutPlayerInfo$PlayerInfoData", "PlayerInfoData");
+            PacketPlayOutPlayerInfoStorage.EnumGamemodeClass = (Class<Enum>) getLegacyClass("EnumGamemode", "WorldSettings$EnumGamemode");
+        }
+
+        // Scoreboard
+        PacketPlayOutScoreboardDisplayObjectiveStorage.CLASS = getLegacyClass("PacketPlayOutScoreboardDisplayObjective", "Packet208SetScoreboardDisplayObjective");
+        PacketPlayOutScoreboardObjectiveStorage.CLASS = getLegacyClass("PacketPlayOutScoreboardObjective", "Packet206SetScoreboardObjective");
+        PacketPlayOutScoreboardTeamStorage.CLASS = getLegacyClass("PacketPlayOutScoreboardTeam", "Packet209SetScoreboardTeam");
+        PacketPlayOutScoreboardScoreStorage.CLASS = getLegacyClass("PacketPlayOutScoreboardScore", "Packet207SetScoreboardScore");
+        Scoreboard = getLegacyClass("Scoreboard");
+        PacketPlayOutScoreboardObjectiveStorage.ScoreboardObjective = getLegacyClass("ScoreboardObjective");
+        PacketPlayOutScoreboardScoreStorage.ScoreboardScore = getLegacyClass("ScoreboardScore");
+        IScoreboardCriteria = getLegacyClass("IScoreboardCriteria", "IObjective"); // 1.5.1+, 1.5
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam = getLegacyClass("ScoreboardTeam");
+        if (minorVersion >= 8) {
+            PacketPlayOutScoreboardObjectiveStorage.EnumScoreboardHealthDisplay = (Class<Enum>) getLegacyClass("IScoreboardCriteria$EnumScoreboardHealthDisplay", "EnumScoreboardHealthDisplay");
+            PacketPlayOutScoreboardScoreStorage.EnumScoreboardAction = (Class<Enum>) getLegacyClass("ScoreboardServer$Action", "PacketPlayOutScoreboardScore$EnumScoreboardAction", "EnumScoreboardAction");
+            PacketPlayOutScoreboardTeamStorage.EnumNameTagVisibility = (Class<Enum>) getLegacyClass("ScoreboardTeamBase$EnumNameTagVisibility", "EnumNameTagVisibility");
+        }
+        if (minorVersion >= 9) {
+            PacketPlayOutScoreboardTeamStorage.EnumTeamPush = (Class<Enum>) getLegacyClass("ScoreboardTeamBase$EnumTeamPush");
+        }
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/storage/nms/BukkitModernNMSStorage.java

@@ -0,0 +1,140 @@
+package me.neznamy.tab.platforms.bukkit.nms.storage.nms;
+
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutEntityDestroyStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutEntityMetadataStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutEntityTeleportStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutSpawnEntityLivingStorage;
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherHelper;
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherItem;
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherObject;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.*;
+
+/**
+ * NMS loader for minecraft 1.17+ using Mojang packaging and bukkit names.
+ */
+@SuppressWarnings({"unchecked", "rawtypes"})
+public class BukkitModernNMSStorage extends NMSStorage {
+
+    public BukkitModernNMSStorage() throws ReflectiveOperationException {}
+
+    @Override
+    public void loadNamedFieldsAndMethods() throws ReflectiveOperationException {
+        (PING = EntityPlayer.getDeclaredField("e")).setAccessible(true);
+        ChatSerializer_DESERIALIZE = ChatSerializer.getMethod("a", String.class);
+        DataWatcher.REGISTER = getMethod(DataWatcher.CLASS, new String[]{"register", "a"}, DataWatcherObject.CLASS, Object.class); // {Bukkit, Bukkit 1.18+}
+        PacketPlayOutScoreboardScoreStorage.ScoreboardScore_setScore = getMethod(PacketPlayOutScoreboardScoreStorage.ScoreboardScore, new String[]{"setScore", "b"}, int.class); // {Bukkit, Bukkit 1.18+}
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setAllowFriendlyFire = getMethod(PacketPlayOutScoreboardTeamStorage.ScoreboardTeam, new String[]{"setAllowFriendlyFire", "a"}, boolean.class); // {Bukkit, Bukkit 1.18+}
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setCanSeeFriendlyInvisibles = getMethod(PacketPlayOutScoreboardTeamStorage.ScoreboardTeam, new String[]{"setCanSeeFriendlyInvisibles", "b"}, boolean.class); // {Bukkit, Bukkit 1.18+}
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setPrefix = getMethod(PacketPlayOutScoreboardTeamStorage.ScoreboardTeam, new String[]{"setPrefix", "b"}, IChatBaseComponent); // {Bukkit, Bukkit 1.18+}
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setSuffix = getMethod(PacketPlayOutScoreboardTeamStorage.ScoreboardTeam, new String[]{"setSuffix", "c"}, IChatBaseComponent); // {Bukkit, Bukkit 1.18+}
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setNameTagVisibility = getMethod(PacketPlayOutScoreboardTeamStorage.ScoreboardTeam, new String[]{"setNameTagVisibility", "a"}, PacketPlayOutScoreboardTeamStorage.EnumNameTagVisibility); // {Bukkit, Bukkit 1.18+}
+        DataWatcherHelper.DataWatcherSerializer_BYTE = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("a").get(null);
+        DataWatcherHelper.DataWatcherSerializer_FLOAT = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("c").get(null);
+        DataWatcherHelper.DataWatcherSerializer_STRING = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("d").get(null);
+        if (is1_19_3Plus()) {
+            DataWatcherHelper.DataWatcherSerializer_OPTIONAL_COMPONENT = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("g").get(null);
+            if (is1_19_4Plus()) {
+                DataWatcherHelper.DataWatcherSerializer_BOOLEAN = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("k").get(null);
+            } else {
+                DataWatcherHelper.DataWatcherSerializer_BOOLEAN = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("j").get(null);
+            }
+         } else {
+            DataWatcherHelper.DataWatcherSerializer_OPTIONAL_COMPONENT = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("f").get(null);
+            DataWatcherHelper.DataWatcherSerializer_BOOLEAN = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("i").get(null);
+        }
+        if (minorVersion >= 19) {
+            PacketPlayOutSpawnEntityLivingStorage.EntityTypes_ARMOR_STAND = PacketPlayOutSpawnEntityLivingStorage.EntityTypes.getDeclaredField("d").get(null);
+            (PacketPlayOutSpawnEntityLivingStorage.ENTITY_TYPE = PacketPlayOutSpawnEntityLivingStorage.CLASS.getDeclaredField("e")).setAccessible(true);
+            DataWatcher.packDirty = DataWatcher.CLASS.getMethod("b");
+        }
+    }
+
+    @Override
+    public void loadClasses() throws ClassNotFoundException {
+        ChatSerializer = Class.forName("net.minecraft.network.chat.IChatBaseComponent$ChatSerializer");
+        World = Class.forName("net.minecraft.world.level.World");
+        EntityArmorStand = Class.forName("net.minecraft.world.entity.decoration.EntityArmorStand");
+        EntityHuman = Class.forName("net.minecraft.world.entity.player.EntityHuman");
+        NetworkManager = Class.forName("net.minecraft.network.NetworkManager");
+        IChatBaseComponent = Class.forName("net.minecraft.network.chat.IChatBaseComponent");
+        Packet = Class.forName("net.minecraft.network.protocol.Packet");
+        EnumChatFormat = (Class<Enum>) Class.forName("net.minecraft.EnumChatFormat");
+        EntityPlayer = Class.forName("net.minecraft.server.level.EntityPlayer");
+        Entity = Class.forName("net.minecraft.world.entity.Entity");
+        EntityLiving = Class.forName("net.minecraft.world.entity.EntityLiving");
+        PlayerConnection = Class.forName("net.minecraft.server.network.PlayerConnection");
+
+        PacketPlayOutPlayerListHeaderFooterStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutPlayerListHeaderFooter");
+        if (minorVersion >= 19) {
+            PacketPlayOutChatStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundSystemChatPacket");
+        } else {
+            PacketPlayOutChatStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutChat");
+            PacketPlayOutChatStorage.ChatMessageTypeClass = (Class<Enum>) Class.forName("net.minecraft.network.chat.ChatMessageType");
+        }
+
+        // DataWatcher
+        DataWatcher.CLASS = Class.forName("net.minecraft.network.syncher.DataWatcher");
+        DataWatcherItem.CLASS = Class.forName("net.minecraft.network.syncher.DataWatcher$Item");
+        DataWatcherObject.CLASS = Class.forName("net.minecraft.network.syncher.DataWatcherObject");
+        DataWatcherHelper.DataWatcherRegistry = Class.forName("net.minecraft.network.syncher.DataWatcherRegistry");
+        DataWatcherHelper.DataWatcherSerializer = Class.forName("net.minecraft.network.syncher.DataWatcherSerializer");
+        if (is1_19_3Plus()) {
+            DataWatcher.DataValue = Class.forName("net.minecraft.network.syncher.DataWatcher$b");
+        }
+
+        // Entities
+        if (minorVersion >= 19) {
+            PacketPlayOutSpawnEntityLivingStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutSpawnEntity");
+        } else {
+            PacketPlayOutSpawnEntityLivingStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutSpawnEntityLiving");
+        }
+        PacketPlayOutEntityTeleportStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntityTeleport");
+        PacketPlayInUseEntity = Class.forName("net.minecraft.network.protocol.game.PacketPlayInUseEntity");
+        PacketPlayInUseEntity$d = Class.forName("net.minecraft.network.protocol.game.PacketPlayInUseEntity$d");
+        PacketPlayOutEntity = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntity");
+        PacketPlayOutEntityDestroyStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntityDestroy");
+        PacketPlayOutEntityLook = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntity$PacketPlayOutEntityLook");
+        PacketPlayOutEntityMetadataStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntityMetadata");
+        PacketPlayOutNamedEntitySpawn = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutNamedEntitySpawn");
+        EnumEntityUseAction = (Class<Enum>) Class.forName("net.minecraft.network.protocol.game.PacketPlayInUseEntity$EnumEntityUseAction");
+        if (minorVersion >= 19) {
+            PacketPlayOutSpawnEntityLivingStorage.EntityTypes = Class.forName("net.minecraft.world.entity.EntityTypes");
+        }
+
+        // Player Info
+        if (minorVersion >= 19) {
+            PacketPlayOutPlayerInfoStorage.ProfilePublicKey = Class.forName("net.minecraft.world.entity.player.ProfilePublicKey");
+            PacketPlayOutPlayerInfoStorage.ProfilePublicKey$a = Class.forName("net.minecraft.world.entity.player.ProfilePublicKey$a");
+        }
+        if (is1_19_3Plus()) {
+            PacketPlayOutPlayerInfoStorage.ClientboundPlayerInfoRemovePacket = Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoRemovePacket");
+            PacketPlayOutPlayerInfoStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket");
+            PacketPlayOutPlayerInfoStorage.EnumPlayerInfoActionClass = (Class<Enum>) Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket$a");
+            PacketPlayOutPlayerInfoStorage.PlayerInfoDataStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket$b");
+            PacketPlayOutPlayerInfoStorage.RemoteChatSession = Class.forName("net.minecraft.network.chat.RemoteChatSession");
+            PacketPlayOutPlayerInfoStorage.RemoteChatSession$Data = Class.forName("net.minecraft.network.chat.RemoteChatSession$a");
+        } else {
+            PacketPlayOutPlayerInfoStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutPlayerInfo");
+            PacketPlayOutPlayerInfoStorage.EnumPlayerInfoActionClass = (Class<Enum>) Class.forName("net.minecraft.network.protocol.game.PacketPlayOutPlayerInfo$EnumPlayerInfoAction");
+            PacketPlayOutPlayerInfoStorage.PlayerInfoDataStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutPlayerInfo$PlayerInfoData");
+        }
+        PacketPlayOutPlayerInfoStorage.EnumGamemodeClass = (Class<Enum>) Class.forName("net.minecraft.world.level.EnumGamemode");
+
+        // Scoreboard
+        PacketPlayOutScoreboardDisplayObjectiveStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardDisplayObjective");
+        PacketPlayOutScoreboardObjectiveStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardObjective");
+        Scoreboard = Class.forName("net.minecraft.world.scores.Scoreboard");
+        PacketPlayOutScoreboardScoreStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardScore");
+        PacketPlayOutScoreboardObjectiveStorage.ScoreboardObjective = Class.forName("net.minecraft.world.scores.ScoreboardObjective");
+        PacketPlayOutScoreboardScoreStorage.ScoreboardScore = Class.forName("net.minecraft.world.scores.ScoreboardScore");
+        IScoreboardCriteria = Class.forName("net.minecraft.world.scores.criteria.IScoreboardCriteria");
+        PacketPlayOutScoreboardObjectiveStorage.EnumScoreboardHealthDisplay = (Class<Enum>) Class.forName("net.minecraft.world.scores.criteria.IScoreboardCriteria$EnumScoreboardHealthDisplay");
+        PacketPlayOutScoreboardScoreStorage.EnumScoreboardAction = (Class<Enum>) Class.forName("net.minecraft.server.ScoreboardServer$Action");
+        PacketPlayOutScoreboardTeamStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardTeam");
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam = Class.forName("net.minecraft.world.scores.ScoreboardTeam");
+        PacketPlayOutScoreboardTeamStorage.EnumNameTagVisibility = (Class<Enum>) Class.forName("net.minecraft.world.scores.ScoreboardTeamBase$EnumNameTagVisibility");
+        PacketPlayOutScoreboardTeamStorage.EnumTeamPush = (Class<Enum>) Class.forName("net.minecraft.world.scores.ScoreboardTeamBase$EnumTeamPush");
+        PacketPlayOutScoreboardTeamStorage.PlayerAction = (Class<Enum>) Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardTeam$a");
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/storage/nms/MojangModernNMSStorage.java

@@ -0,0 +1,130 @@
+package me.neznamy.tab.platforms.bukkit.nms.storage.nms;
+
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutEntityDestroyStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutEntityMetadataStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutEntityTeleportStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutSpawnEntityLivingStorage;
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherHelper;
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherItem;
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherObject;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.*;
+
+/**
+ * NMS loader for minecraft 1.17+ using Mojang packaging and names.
+ */
+@SuppressWarnings({"unchecked", "rawtypes"})
+public class MojangModernNMSStorage extends NMSStorage {
+
+    public MojangModernNMSStorage() throws ReflectiveOperationException {}
+
+    @Override
+    public void loadNamedFieldsAndMethods() throws ReflectiveOperationException {
+        (PING = EntityPlayer.getDeclaredField("latency")).setAccessible(true);
+        ChatSerializer_DESERIALIZE = ChatSerializer.getMethod("fromJson", String.class);
+        DataWatcher.REGISTER = DataWatcher.CLASS.getMethod("define", DataWatcherObject.CLASS, Object.class);
+        PacketPlayOutScoreboardScoreStorage.ScoreboardScore_setScore = PacketPlayOutScoreboardScoreStorage.ScoreboardScore.getMethod("setScore", int.class);
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setAllowFriendlyFire = PacketPlayOutScoreboardTeamStorage.ScoreboardTeam.getMethod("setAllowFriendlyFire", boolean.class);
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setCanSeeFriendlyInvisibles = PacketPlayOutScoreboardTeamStorage.ScoreboardTeam.getMethod("setSeeFriendlyInvisibles", boolean.class);
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setPrefix = PacketPlayOutScoreboardTeamStorage.ScoreboardTeam.getMethod("setPlayerPrefix", IChatBaseComponent);
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setSuffix = PacketPlayOutScoreboardTeamStorage.ScoreboardTeam.getMethod("setPlayerSuffix", IChatBaseComponent);
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setNameTagVisibility = PacketPlayOutScoreboardTeamStorage.ScoreboardTeam.getMethod("setNameTagVisibility", PacketPlayOutScoreboardTeamStorage.EnumNameTagVisibility);
+        DataWatcherHelper.DataWatcherSerializer_BYTE = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("BYTE").get(null);
+        DataWatcherHelper.DataWatcherSerializer_FLOAT = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("FLOAT").get(null);
+        DataWatcherHelper.DataWatcherSerializer_STRING = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("STRING").get(null);
+        DataWatcherHelper.DataWatcherSerializer_OPTIONAL_COMPONENT = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("OPTIONAL_COMPONENT").get(null);
+        DataWatcherHelper.DataWatcherSerializer_BOOLEAN = DataWatcherHelper.DataWatcherRegistry.getDeclaredField("BOOLEAN").get(null);
+        if (minorVersion >= 19) {
+            PacketPlayOutSpawnEntityLivingStorage.EntityTypes_ARMOR_STAND = PacketPlayOutSpawnEntityLivingStorage.EntityTypes.getDeclaredField("ARMOR_STAND").get(null);
+            (PacketPlayOutSpawnEntityLivingStorage.ENTITY_TYPE = PacketPlayOutSpawnEntityLivingStorage.CLASS.getDeclaredField("type")).setAccessible(true);
+            DataWatcher.packDirty = DataWatcher.CLASS.getMethod("packDirty");
+        }
+    }
+
+    @Override
+    public void loadClasses() throws ClassNotFoundException {
+        IChatBaseComponent = Class.forName("net.minecraft.network.chat.Component");
+        ChatSerializer = Class.forName("net.minecraft.network.chat.Component$Serializer");
+        World = Class.forName("net.minecraft.world.level.Level");
+        EntityArmorStand = Class.forName("net.minecraft.world.entity.decoration.ArmorStand");
+        EntityHuman = Class.forName("net.minecraft.world.entity.player.Player");
+        NetworkManager = Class.forName("net.minecraft.network.Connection");
+        Packet = Class.forName("net.minecraft.network.protocol.Packet");
+        EnumChatFormat = (Class<Enum>) Class.forName("net.minecraft.ChatFormatting");
+        EntityPlayer = Class.forName("net.minecraft.server.level.ServerPlayer");
+        Entity = Class.forName("net.minecraft.world.entity.Entity");
+        EntityLiving = Class.forName("net.minecraft.world.entity.LivingEntity");
+        PlayerConnection = Class.forName("net.minecraft.server.network.ServerGamePacketListenerImpl");
+        PacketPlayOutPlayerListHeaderFooterStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundTabListPacket");
+        if (minorVersion >= 19) {
+            PacketPlayOutChatStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundSystemChatPacket");
+        } else {
+            PacketPlayOutChatStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundChatPacket");
+            PacketPlayOutChatStorage.ChatMessageTypeClass = (Class<Enum>) Class.forName("net.minecraft.network.chat.ChatType");
+        }
+
+        // DataWatcher
+        DataWatcher.CLASS = Class.forName("net.minecraft.network.syncher.SynchedEntityData");
+        DataWatcherItem.CLASS = Class.forName("net.minecraft.network.syncher.SynchedEntityData$DataItem");
+        DataWatcherObject.CLASS = Class.forName("net.minecraft.network.syncher.EntityDataAccessor");
+        DataWatcherHelper.DataWatcherRegistry = Class.forName("net.minecraft.network.syncher.EntityDataSerializers");
+        DataWatcherHelper.DataWatcherSerializer = Class.forName("net.minecraft.network.syncher.EntityDataSerializer");
+        if (is1_19_3Plus()) {
+            DataWatcher.DataValue = Class.forName("net.minecraft.network.syncher.SynchedEntityData$DataValue");
+        }
+
+        // Entities
+        if (minorVersion >= 19) {
+            PacketPlayOutSpawnEntityLivingStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundAddEntityPacket");
+        } else {
+            PacketPlayOutSpawnEntityLivingStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundAddMobPacket");
+        }
+        PacketPlayOutEntityTeleportStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundTeleportEntityPacket");
+        PacketPlayInUseEntity = Class.forName("net.minecraft.network.protocol.game.ServerboundInteractPacket");
+        PacketPlayInUseEntity$d = Class.forName("net.minecraft.network.protocol.game.ServerboundInteractPacket$InteractionAction");
+        PacketPlayOutEntity = Class.forName("net.minecraft.network.protocol.game.ClientboundMoveEntityPacket");
+        PacketPlayOutEntityDestroyStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundRemoveEntitiesPacket");
+        PacketPlayOutEntityLook = Class.forName("net.minecraft.network.protocol.game.ClientboundMoveEntityPacket$Rot");
+        PacketPlayOutEntityMetadataStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundSetEntityDataPacket");
+        PacketPlayOutNamedEntitySpawn = Class.forName("net.minecraft.network.protocol.game.ClientboundAddPlayerPacket");
+        EnumEntityUseAction = (Class<Enum>) Class.forName("net.minecraft.network.protocol.game.ServerboundInteractPacket$Action");
+        if (minorVersion >= 19) {
+            PacketPlayOutSpawnEntityLivingStorage.EntityTypes = Class.forName("net.minecraft.world.entity.EntityType");
+        }
+
+        // Player Info
+        if (minorVersion >= 19) {
+            PacketPlayOutPlayerInfoStorage.ProfilePublicKey = Class.forName("net.minecraft.world.entity.player.ProfilePublicKey");
+            PacketPlayOutPlayerInfoStorage.ProfilePublicKey$a = Class.forName("net.minecraft.world.entity.player.ProfilePublicKey$Data");
+        }
+        if (is1_19_3Plus()) {
+            PacketPlayOutPlayerInfoStorage.ClientboundPlayerInfoRemovePacket = Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoRemovePacket");
+            PacketPlayOutPlayerInfoStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket");
+            PacketPlayOutPlayerInfoStorage.EnumPlayerInfoActionClass = (Class<Enum>) Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket$Action");
+            PacketPlayOutPlayerInfoStorage.PlayerInfoDataStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket$Entry");
+            PacketPlayOutPlayerInfoStorage.RemoteChatSession = Class.forName("net.minecraft.network.chat.RemoteChatSession");
+            PacketPlayOutPlayerInfoStorage.RemoteChatSession$Data = Class.forName("net.minecraft.network.chat.RemoteChatSession$Data");
+        } else {
+            PacketPlayOutPlayerInfoStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket");
+            PacketPlayOutPlayerInfoStorage.EnumPlayerInfoActionClass = (Class<Enum>) Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket$Action");
+            PacketPlayOutPlayerInfoStorage.PlayerInfoDataStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket$PlayerUpdate");
+        }
+        PacketPlayOutPlayerInfoStorage.EnumGamemodeClass = (Class<Enum>) Class.forName("net.minecraft.world.level.GameType");
+
+        // Scoreboard
+        PacketPlayOutScoreboardDisplayObjectiveStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundSetDisplayObjectivePacket");
+        PacketPlayOutScoreboardObjectiveStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundSetObjectivePacket");
+        Scoreboard = Class.forName("net.minecraft.world.scores.Scoreboard");
+        PacketPlayOutScoreboardScoreStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundSetScorePacket");
+        PacketPlayOutScoreboardObjectiveStorage.ScoreboardObjective = Class.forName("net.minecraft.world.scores.Objective");
+        PacketPlayOutScoreboardScoreStorage.ScoreboardScore = Class.forName("net.minecraft.world.scores.Score");
+        IScoreboardCriteria = Class.forName("net.minecraft.world.scores.criteria.ObjectiveCriteria");
+        PacketPlayOutScoreboardObjectiveStorage.EnumScoreboardHealthDisplay = (Class<Enum>) Class.forName("net.minecraft.world.scores.criteria.ObjectiveCriteria$RenderType");
+        PacketPlayOutScoreboardScoreStorage.EnumScoreboardAction = (Class<Enum>) Class.forName("net.minecraft.server.ServerScoreboard$Method");
+        PacketPlayOutScoreboardTeamStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.ClientboundSetPlayerTeamPacket");
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam = Class.forName("net.minecraft.world.scores.PlayerTeam");
+        PacketPlayOutScoreboardTeamStorage.EnumNameTagVisibility = (Class<Enum>) Class.forName("net.minecraft.world.scores.Team$Visibility");
+        PacketPlayOutScoreboardTeamStorage.EnumTeamPush = (Class<Enum>) Class.forName("net.minecraft.world.scores.Team$CollisionRule");
+        PacketPlayOutScoreboardTeamStorage.PlayerAction = (Class<Enum>) Class.forName("net.minecraft.network.protocol.game.ClientboundSetPlayerTeamPacket$Action");
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/storage/nms/NMSStorage.java

@@ -0,0 +1,291 @@
+package me.neznamy.tab.platforms.bukkit.nms.storage.nms;
+
+import com.mojang.authlib.GameProfile;
+import io.netty.channel.Channel;
+import lombok.Getter;
+import lombok.Setter;
+import me.neznamy.tab.api.ProtocolVersion;
+import me.neznamy.tab.api.TabAPI;
+import me.neznamy.tab.api.chat.IChatBaseComponent;
+import me.neznamy.tab.api.chat.WrappedChatComponent;
+import me.neznamy.tab.api.util.ComponentCache;
+import me.neznamy.tab.api.util.ReflectionUtils;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutEntityDestroyStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutEntityMetadataStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutEntityTeleportStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutSpawnEntityLivingStorage;
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherItem;
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherObject;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.*;
+import org.bukkit.Bukkit;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Class holding all NMS classes, methods, fields and constructors used by TAB.
+ */
+@SuppressWarnings("rawtypes")
+public abstract class NMSStorage {
+
+    /** Instance of this class */
+    @Getter @Setter private static NMSStorage instance;
+
+    /** Server's NMS/CraftBukkit package */
+    protected final String serverPackage = Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3];
+
+    /** Server's minor version */
+    @Getter protected final int minorVersion = Integer.parseInt(serverPackage.split("_")[1]);
+
+    /** Flag determining whether the server version is at least 1.19.3 or not */
+    @Getter private final boolean is1_19_3Plus = ReflectionUtils.classExists("net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket");
+    @Getter private final boolean is1_19_4Plus = is1_19_3Plus && !serverPackage.equals("v1_19_R2");
+
+    /** Basic universal values */
+    protected Class<?> Packet;
+    protected Class<?> NetworkManager;
+    protected Class<?> EntityArmorStand;
+    protected Class<?> World;
+    public Class<Enum> EnumChatFormat;
+    public Class<?> EntityPlayer;
+    protected Class<?> EntityHuman;
+    public Class<?> Entity;
+    public Class<?> EntityLiving;
+    protected Class<?> PlayerConnection;
+    public Field PING;
+    public Field PLAYER_CONNECTION;
+    public Field NETWORK_MANAGER;
+    public Field CHANNEL;
+    public Method getHandle;
+    public Method sendPacket;
+    public Method getProfile;
+
+    /** Chat components */
+    public Class<?> IChatBaseComponent;
+    protected Class<?> ChatSerializer;
+    public Method ChatSerializer_DESERIALIZE;
+
+    /** Other entity packets */
+    public Class<?> PacketPlayInUseEntity;
+    public Class<?> PacketPlayInUseEntity$d;
+    protected Class<Enum> EnumEntityUseAction;
+    public Field PacketPlayInUseEntity_ENTITY;
+    public Field PacketPlayInUseEntity_ACTION;
+
+    public Class<?> PacketPlayOutEntity;
+    public Field PacketPlayOutEntity_ENTITYID;
+
+    public Class<?> PacketPlayOutEntityLook;
+
+    public Class<?> PacketPlayOutNamedEntitySpawn;
+    public Field PacketPlayOutNamedEntitySpawn_ENTITYID;
+
+    /** Scoreboard objectives */
+    public Class<?> Scoreboard;
+    protected Constructor<?> newScoreboard;
+    protected Class<?> IScoreboardCriteria;
+    public Field IScoreboardCriteria_self;
+    public Object emptyScoreboard;
+
+    public Object dummyEntity;
+
+    private final ComponentCache<IChatBaseComponent, Object> componentCache = new ComponentCache<>(10000,
+            (component, clientVersion) -> ChatSerializer_DESERIALIZE.invoke(null, component.toString(clientVersion)));
+
+    /**
+     * Constructs new instance and attempts to load all fields, methods and constructors.
+     *
+     * @throws  ReflectiveOperationException
+     *          If some field, constructor or method was not found
+     */
+    public NMSStorage() throws ReflectiveOperationException {
+        ProtocolVersion.UNKNOWN_SERVER_VERSION.setMinorVersion(minorVersion); //fixing compatibility with forks that set version field value to "Unknown"
+        loadClasses();
+        if (minorVersion >= 7) {
+            NETWORK_MANAGER = getFields(PlayerConnection, NetworkManager).get(0);
+        }
+        if (minorVersion >= 8) {
+            CHANNEL = getFields(NetworkManager, Channel.class).get(0);
+            getProfile = getMethods(EntityHuman, GameProfile.class).get(0);
+            Constructor<?> newEntityArmorStand = EntityArmorStand.getConstructor(World, double.class, double.class, double.class);
+            Method World_getHandle = Class.forName("org.bukkit.craftbukkit." + serverPackage + ".CraftWorld").getMethod("getHandle");
+            dummyEntity = newEntityArmorStand.newInstance(World_getHandle.invoke(Bukkit.getWorlds().get(0)), 0, 0, 0);
+        }
+        PLAYER_CONNECTION = getFields(EntityPlayer, PlayerConnection).get(0);
+        getHandle = Class.forName("org.bukkit.craftbukkit." + serverPackage + ".entity.CraftPlayer").getMethod("getHandle");
+        sendPacket = getMethods(PlayerConnection, void.class, Packet).get(0);
+        newScoreboard = Scoreboard.getConstructor();
+        emptyScoreboard = newScoreboard.newInstance();
+        DataWatcher.load(this);
+        DataWatcherItem.load(this);
+        DataWatcherObject.load(this);
+        PacketPlayOutEntityDestroyStorage.load(this);
+        PacketPlayOutEntityMetadataStorage.load(this);
+        PacketPlayOutEntityTeleportStorage.load(this);
+        PacketPlayOutSpawnEntityLivingStorage.load(this);
+        PacketPlayOutChatStorage.load(this);
+        PacketPlayOutPlayerListHeaderFooterStorage.load(this);
+        PacketPlayOutPlayerInfoStorage.load(this);
+        PacketPlayOutScoreboardObjectiveStorage.load(this);
+        PacketPlayOutScoreboardDisplayObjectiveStorage.load(this);
+        otherEntity();
+        PacketPlayOutScoreboardTeamStorage.load(this);
+        PacketPlayOutScoreboardScoreStorage.load(this);
+        IScoreboardCriteria_self = getFields(IScoreboardCriteria, IScoreboardCriteria).get(0);
+        loadNamedFieldsAndMethods();
+    }
+
+    /**
+     * Loads fields for other entity packets
+     *
+     */
+    protected void otherEntity() {
+        PacketPlayOutEntity_ENTITYID = getFields(PacketPlayOutEntity, int.class).get(0);
+        PacketPlayOutNamedEntitySpawn_ENTITYID = getFields(PacketPlayOutNamedEntitySpawn, int.class).get(0);
+        if (minorVersion >= 7) {
+            PacketPlayInUseEntity_ENTITY = getFields(PacketPlayInUseEntity, int.class).get(0);
+            PacketPlayInUseEntity_ACTION = getFields(PacketPlayInUseEntity, EnumEntityUseAction).get(0);
+        }
+    }
+
+    /**
+     * Loads all classes used by the plugin
+     *
+     * @throws  ClassNotFoundException
+     *          If a class was not found
+     */
+    public abstract void loadClasses() throws ClassNotFoundException;
+
+    /**
+     * Loads all fields and methods which must be loaded by their name due to
+     * lack of other methods of reliably retrieving them.
+     *
+     * @throws  ReflectiveOperationException
+     *          If a field or method was not found
+     */
+    public abstract void loadNamedFieldsAndMethods() throws ReflectiveOperationException;
+
+    /**
+     * Returns method with specified possible names and parameters. Throws exception if no such method was found
+     *
+     * @param   clazz
+     *          lass to get method from
+     * @param   names
+     *          possible method names
+     * @param   parameterTypes
+     *          parameter types of the method
+     * @return  method with specified name and parameters
+     * @throws  NoSuchMethodException
+     *          if no such method exists
+     */
+    protected Method getMethod(Class<?> clazz, String[] names, Class<?>... parameterTypes) throws NoSuchMethodException {
+        for (String name : names) {
+            try {
+                return clazz.getMethod(name, parameterTypes);
+            } catch (NoSuchMethodException e) {
+                //not the first method in array
+            }
+        }
+        List<String> list = new ArrayList<>();
+        for (Method m : clazz.getMethods()) {
+            if (m.getParameterCount() != parameterTypes.length) continue;
+            Class<?>[] types = m.getParameterTypes();
+            boolean valid = true;
+            for (int i=0; i<types.length; i++) {
+                if (types[i] != parameterTypes[i]) {
+                    valid = false;
+                    break;
+                }
+            }
+            if (valid) list.add(m.getName());
+        }
+        throw new NoSuchMethodException("No method found with possible names " + Arrays.toString(names) + " with parameters " +
+                Arrays.toString(parameterTypes) + " in class " + clazz.getName() + ". Methods with matching parameters: " + list);
+    }
+
+    /**
+     * Returns all methods from class which return specified class type and have specified parameter types.
+     *
+     * @param   clazz
+     *          Class to get methods from
+     * @param   returnType
+     *          Return type of methods
+     * @param   parameterTypes
+     *          Parameter types of methods
+     * @return  List of found methods matching requirements. If nothing is found, empty list is returned.
+     */
+    public List<Method> getMethods(Class<?> clazz, Class<?> returnType, Class<?>... parameterTypes) {
+        List<Method> list = new ArrayList<>();
+        for (Method m : clazz.getDeclaredMethods()) {
+            if (m.getReturnType() != returnType || m.getParameterCount() != parameterTypes.length || !Modifier.isPublic(m.getModifiers())) continue;
+            Class<?>[] types = m.getParameterTypes();
+            boolean valid = true;
+            for (int i=0; i<types.length; i++) {
+                if (types[i] != parameterTypes[i]) {
+                    valid = false;
+                    break;
+                }
+            }
+            if (valid) list.add(m);
+        }
+        return list;
+    }
+
+    /**
+     * Returns all fields of class with defined class type
+     *
+     * @param   clazz
+     *          class to check fields of
+     * @param   type
+     *          field type to check for
+     * @return  list of all fields with specified class type
+     */
+    public List<Field> getFields(Class<?> clazz, Class<?> type) {
+        List<Field> list = new ArrayList<>();
+        for (Field field : clazz.getDeclaredFields()) {
+            if (field.getType() == type) {
+                field.setAccessible(true);
+                list.add(field);
+            }
+        }
+        return list;
+    }
+
+    /**
+     * Converts TAB's IChatBaseComponent into minecraft's component using String deserialization.
+     * If the requested component is found in cache, it is returned. If not, it is created, added into cache and returned.
+     * If {@code component} is {@code null}, returns {@code null}
+     *
+     * @param   component
+     *          component to convert
+     * @param   clientVersion
+     *          client version used to decide RGB conversion
+     * @return  converted component or {@code null} if {@code component} is {@code null}
+     */
+    public Object toNMSComponent(IChatBaseComponent component, ProtocolVersion clientVersion) {
+        if (component instanceof WrappedChatComponent) return ((WrappedChatComponent) component).getOriginalComponent();
+        return componentCache.get(component, clientVersion);
+    }
+
+    /**
+     * Creates a new Scoreboard Objective with given name.
+     *
+     * @param   objectiveName
+     *          Objective name
+     * @return  NMS Objective
+     * @throws  ReflectiveOperationException
+     *          if thrown by reflective operation
+     */
+    public Object newScoreboardObjective(String objectiveName) throws ReflectiveOperationException {
+        if (minorVersion >= 13) {
+            return PacketPlayOutScoreboardObjectiveStorage.newScoreboardObjective.newInstance(null, objectiveName, null, toNMSComponent(new IChatBaseComponent(""), TabAPI.getInstance().getServerVersion()), null);
+        }
+        return PacketPlayOutScoreboardObjectiveStorage.newScoreboardObjective.newInstance(null, objectiveName, IScoreboardCriteria_self.get(null));
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/storage/nms/ThermosNMSStorage.java

@@ -0,0 +1,35 @@
+package me.neznamy.tab.platforms.bukkit.nms.storage.nms;
+
+import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutScoreboardScoreStorage;
+import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutScoreboardTeamStorage;
+
+/**
+ * NMS loader for Thermos 1.7.10.
+ */
+public class ThermosNMSStorage extends BukkitLegacyNMSStorage {
+
+    public ThermosNMSStorage() throws ReflectiveOperationException {}
+
+    @Override
+    public Class<?> getLegacyClass(String name) throws ClassNotFoundException {
+        try {
+            return getClass().getClassLoader().loadClass("net.minecraft.server." + serverPackage + "." + name);
+        } catch (NullPointerException e) {
+            // nested class not found
+            throw new ClassNotFoundException(name);
+        }
+    }
+
+    @Override
+    public void loadNamedFieldsAndMethods() throws ReflectiveOperationException {
+        (PING = EntityPlayer.getDeclaredField("field_71138_i")).setAccessible(true);
+        PacketPlayOutScoreboardScoreStorage.ScoreboardScore_setScore = PacketPlayOutScoreboardScoreStorage.ScoreboardScore.getMethod("func_96647_c", int.class);
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setAllowFriendlyFire = PacketPlayOutScoreboardTeamStorage.ScoreboardTeam.getMethod("func_96660_a", boolean.class);
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setCanSeeFriendlyInvisibles = PacketPlayOutScoreboardTeamStorage.ScoreboardTeam.getMethod("func_98300_b", boolean.class);
+        ChatSerializer_DESERIALIZE = ChatSerializer.getMethod("func_150699_a", String.class);
+        DataWatcher.REGISTER = DataWatcher.CLASS.getMethod("func_75682_a", int.class, Object.class);
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setPrefix = PacketPlayOutScoreboardTeamStorage.ScoreboardTeam.getMethod("func_96666_b", String.class);
+        PacketPlayOutScoreboardTeamStorage.ScoreboardTeam_setSuffix = PacketPlayOutScoreboardTeamStorage.ScoreboardTeam.getMethod("func_96662_c", String.class);
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/storage/packet/PacketPlayOutChatStorage.java

@@ -0,0 +1,56 @@
+package me.neznamy.tab.platforms.bukkit.nms.storage.packet;
+
+import me.neznamy.tab.api.ProtocolVersion;
+import me.neznamy.tab.api.protocol.PacketPlayOutChat;
+import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
+
+import java.lang.reflect.Constructor;
+import java.util.UUID;
+
+@SuppressWarnings({"unchecked", "rawtypes"})
+public class PacketPlayOutChatStorage {
+
+    public static Class<?> CLASS;
+    public static Class<Enum> ChatMessageTypeClass;
+    public static Constructor<?> CONSTRUCTOR;
+
+    public static void load(NMSStorage nms) throws NoSuchMethodException {
+        if (nms.getMinorVersion() >= 19) {
+            try {
+                CONSTRUCTOR = CLASS.getConstructor(nms.IChatBaseComponent, boolean.class);
+            } catch (NoSuchMethodException e) {
+                //1.19.0
+                CONSTRUCTOR = CLASS.getConstructor(nms.IChatBaseComponent, int.class);
+            }
+        } else if (nms.getMinorVersion() >= 16) {
+            CONSTRUCTOR = CLASS.getConstructor(nms.IChatBaseComponent, ChatMessageTypeClass, UUID.class);
+        } else if (nms.getMinorVersion() >= 12) {
+            CONSTRUCTOR = CLASS.getConstructor(nms.IChatBaseComponent, ChatMessageTypeClass);
+        } else if (nms.getMinorVersion() >= 8) {
+            CONSTRUCTOR = CLASS.getConstructor(nms.IChatBaseComponent, byte.class);
+        } else if (nms.getMinorVersion() >= 7) {
+            CONSTRUCTOR = CLASS.getConstructor(nms.IChatBaseComponent);
+        }
+    }
+
+    public static Object build(PacketPlayOutChat packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
+        NMSStorage nms = NMSStorage.getInstance();
+        Object component = nms.toNMSComponent(packet.getMessage(), clientVersion);
+        if (nms.getMinorVersion() >= 19)
+            try {
+                return CONSTRUCTOR.newInstance(component, packet.getType() == PacketPlayOutChat.ChatMessageType.GAME_INFO);
+            } catch (Exception e) {
+                //1.19.0
+                return CONSTRUCTOR.newInstance(component, packet.getType().ordinal());
+            }
+        if (nms.getMinorVersion() >= 16)
+            return CONSTRUCTOR.newInstance(component, Enum.valueOf(ChatMessageTypeClass, packet.getType().toString()), UUID.randomUUID());
+        if (nms.getMinorVersion() >= 12)
+            return CONSTRUCTOR.newInstance(component, Enum.valueOf(ChatMessageTypeClass, packet.getType().toString()));
+        if (nms.getMinorVersion() >= 8)
+            return CONSTRUCTOR.newInstance(component, (byte) packet.getType().ordinal());
+        if (nms.getMinorVersion() == 7)
+            return CONSTRUCTOR.newInstance(component);
+        return packet;
+    }
+}