Merge pull request #56 from retrooper/dev

1.7 PacketEvents release

.github/workflows/maven.yml

@@ -0,0 +1,30 @@
+name: Generate and deploy JavaDocs
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+    - name: Build with Maven
+      run: mvn install
+    - name: List target/apidocs
+      run: ls target/apidocs
+    - name: GitHub Pages
+      uses: crazy-max/ghaction-github-pages@v2.1.2
+      env:
+        GH_PAT: ${{ secrets.GH_PAT }}
+      with:
+        target_branch: javadocs
+        keep_history: true
+        build_dir: target/apidocs
+        commit_message: Update JavaDocs

.gitignore

@@ -0,0 +1,113 @@
+#
+# JetBrains
+#
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+
+#
+# Java
+#
+
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+#
+# Maven
+#
+target/
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+.mvn/timing.properties
+# https://github.com/takari/maven-wrapper#usage-without-binary-jar
+.mvn/wrapper/maven-wrapper.jar

README.md

@@ -1,10 +1,10 @@
-# packetevents by retrooper
+# packetevents 
 
-A lightweight spigot packetlistener & packetsender coded by retrooper.
+A Spigot packet API with some nice utlities.
 
 ## About
 
-This packetlistener is **only** supported on spigot servers and has been tested to work on these spigot forks: PaperSpigot, Tuinity
+This packetlistener is **only** supported on Spigot servers and has been tested to work on these Spigot forks: PaperMC, Tuinity
 
 * No dependencies
 

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>io.github.retrooper</groupId>
     <artifactId>packetevents</artifactId>
-    <version>1.5.9</version>
+    <version>1.7</version>
 
     <!-- You can build the project with this: "mvn clean compile assembly:single" -->
     <build>
@@ -27,6 +27,18 @@
                     <target>8</target>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>attach-javadocs</id>
+                        <goals>
+                            <goal>jar</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
         </plugins>
     </build>
     <packaging>jar</packaging>
@@ -62,6 +74,26 @@
 
 
     <dependencies>
+        <dependency>
+            <groupId>org.github.spigot</groupId>
+            <artifactId>1.16.2</artifactId>
+            <version>1.16.2</version>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.github.spigot</groupId>
+            <artifactId>1.13.2</artifactId>
+            <version>1.13.2</version>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.github.spigot</groupId>
+            <artifactId>1.12.2</artifactId>
+            <version>1.12.2</version>
+            <scope>provided</scope>
+        </dependency>
 
         <dependency>
             <groupId>org.github.spigot</groupId>
@@ -104,13 +136,5 @@
             <version>1.8.8-R0.1-SNAPSHOT</version>
             <scope>provided</scope>
         </dependency>
-
-        <dependency>
-            <groupId>org.bukkit</groupId>
-            <artifactId>bukkit</artifactId>
-            <version>1.8.8-R0.1-SNAPSHOT</version>
-            <scope>provided</scope>
-        </dependency>
-
     </dependencies>
 </project>

src/main/java/io/github/retrooper/packetevents/PacketEvents.java

@@ -1,122 +1,258 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents;
 
-import io.github.retrooper.packetevents.api.PacketEventsAPI;
-import io.github.retrooper.packetevents.enums.ClientVersion;
-import io.github.retrooper.packetevents.enums.ServerVersion;
-import io.github.retrooper.packetevents.event.PacketListener;
-import io.github.retrooper.packetevents.event.impl.BukkitMoveEvent;
-import io.github.retrooper.packetevents.packet.PacketType;
-import io.github.retrooper.packetevents.packet.PacketTypeClasses;
+import io.github.retrooper.packetevents.bungee.BungeePluginMessageListener;
+import io.github.retrooper.packetevents.event.PacketEvent;
+import io.github.retrooper.packetevents.packetmanager.PacketManager;
+import io.github.retrooper.packetevents.packetmanager.netty.NettyPacketManager;
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
 import io.github.retrooper.packetevents.settings.PacketEventsSettings;
+import io.github.retrooper.packetevents.updatechecker.UpdateChecker;
+import io.github.retrooper.packetevents.utils.entityfinder.EntityFinderUtils;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.github.retrooper.packetevents.utils.player.ClientVersion;
+import io.github.retrooper.packetevents.utils.server.PEVersion;
+import io.github.retrooper.packetevents.utils.server.ServerVersion;
 import io.github.retrooper.packetevents.utils.versionlookup.VersionLookupUtils;
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
 import org.bukkit.event.player.PlayerJoinEvent;
-import org.bukkit.event.player.PlayerMoveEvent;
+import org.bukkit.event.player.PlayerLoginEvent;
 import org.bukkit.event.player.PlayerQuitEvent;
 import org.bukkit.plugin.Plugin;
 
-public final class PacketEvents implements PacketListener, Listener {
+import java.util.ArrayList;
+import java.util.Random;
+import java.util.concurrent.Future;
+
+public final class PacketEvents implements Listener {
+    private static final String nettyHandlerIdentifier = generateRandomNettyIdentifier();
+
     private static final PacketEventsAPI packetEventsAPI = new PacketEventsAPI();
     private static final PacketEvents instance = new PacketEvents();
-    private static final PacketEventsSettings settings = new PacketEventsSettings();
-    private static Plugin plugin;
-    private static boolean hasLoaded, hasStarted;
+    private static final ArrayList<Plugin> plugins = new ArrayList<Plugin>(1);
+    private static boolean loaded, initialized;
+    private static final PEVersion version = new PEVersion(1, 7);
+
+    private static PacketEventsSettings settings = new PacketEventsSettings();
 
     /**
-     * Call this before start()
+     * This loads the PacketEvents API.
+     * <p>
+     * ServerVersion:
+     * In this method we detect and cache the server version.
+     * <p>
+     * NMSUtils:
+     * We setup some NMS utilities.
+     * <p>
+     * Packet ID System:
+     * All the packet classes we will be needing are cached in a Map with an integer ID.
+     * <p>
+     * Version Lookup Utils:
+     * We setup the client protocol version system.
+     * We check if ViaVersion, ProtocolSupport or ProtocolLib is present.
+     * <p>
+     * Wrappers:
+     * All PacketEvents' wrappers are setup and do all loading they need to do.
      */
     public static void load() {
-        //SERVER VERSION LOADING
+        if (!loaded) {
+            ServerVersion version = ServerVersion.getVersion();
+            WrappedPacket.version = version;
+            PacketEvent.version = version;
+            NMSUtils.version = version;
+            EntityFinderUtils.version = version;
 
-        //Server Version reversed values caching
-        ServerVersion.reversedValues = ServerVersion.reverse(ServerVersion.values());
+            try {
+                NMSUtils.load();
 
-        PacketTypeClasses.Client.load();
-        PacketTypeClasses.Server.load();
-        ClientVersion.prepareLookUp();
-        hasLoaded = true;
+                PacketTypeClasses.Client.load();
+                PacketTypeClasses.Server.load();
+                PacketTypeClasses.Login.load();
+                PacketTypeClasses.Status.load();
+
+                EntityFinderUtils.load();
+
+                WrappedPacket.loadAllWrappers();
+            } catch (Exception ex) {
+                throw new IllegalStateException("PacketEvents failed to successfully load...", ex);
+            }
+            loaded = true;
+        }
+
+    }
+
+    public static void loadSettings(PacketEventsSettings settings) {
+        PacketEvents.settings = settings;
+    }
+
+    public static void init(final Plugin plugin) {
+        init(plugin, settings);
     }
 
     /**
-     * Loads PacketEvents if you haven't already, Sets everything up, injects all players
+     * Initiates PacketEvents
+     * <p>
+     * Loading:
+     * Loads PacketEvents if you haven't already.
+     * <p>
+     * Registering:
+     * Registers this class as a Bukkit listener to inject/eject players.
+     *
+     * @param pl JavaPlugin instance
      */
-    public static void start(final Plugin pl) {
-        if (!hasLoaded) {
-            load();
-        }
-        if (!hasStarted) {
-            plugin = pl;
-            //Register Bukkit and PacketListener
-            getAPI().getEventManager().registerListener(instance);
+    public static void init(final Plugin pl, PacketEventsSettings packetEventsSettings) {
+        load();
+        if (!initialized) {
+            settings = packetEventsSettings;
+            plugins.add(pl);
 
-            Bukkit.getPluginManager().registerEvents(instance, plugin);
+            //Register Bukkit listener
+            Bukkit.getPluginManager().registerEvents(instance, plugins.get(0));
+            PacketEvents.getAPI().packetManager = new PacketManager(plugins.get(0), settings.shouldInjectEarly());
 
             for (final Player p : Bukkit.getOnlinePlayers()) {
                 getAPI().getPlayerUtils().injectPlayer(p);
             }
-            hasStarted = true;
+
+            if (settings.shouldCheckForUpdates()) {
+                Future<?> future = NettyPacketManager.executorService.submit(new Runnable() {
+                    @Override
+                    public void run() {
+                        new UpdateChecker().handleUpdate();
+                    }
+                });
+            }
+
+            if (getAPI().getServerUtils().isBungeeCordEnabled()) {
+                Bukkit.getMessenger().registerOutgoingPluginChannel(plugins.get(0), "BungeeCord");
+                Bukkit.getServer().getMessenger().registerIncomingPluginChannel(plugins.get(0), BungeePluginMessageListener.tagName, new BungeePluginMessageListener());
+            }
+
+            initialized = true;
         }
     }
 
     /**
-     * Stop all tasks and unregisters all PacketEvents' listeners
+     *
      */
     public static void stop() {
-        if (hasStarted) {
+        if (initialized) {
             for (final Player p : Bukkit.getOnlinePlayers()) {
-
-                getAPI().getPlayerUtils().uninjectPlayerNow(p);
+                getAPI().getPlayerUtils().ejectPlayer(p);
             }
+
             getAPI().getEventManager().unregisterAllListeners();
 
-            PacketType.Client.packetIds.clear();
-            PacketType.Server.packetIds.clear();
+            initialized = false;
+            NettyPacketManager.executorService.shutdownNow();
         }
     }
 
     public static boolean hasLoaded() {
-        return hasLoaded;
+        return loaded;
     }
 
-    public static boolean hasStarted() {
-        return hasStarted;
+    public static boolean isInitialized() {
+        return initialized;
     }
 
     public static PacketEventsAPI getAPI() {
         return packetEventsAPI;
     }
 
-    public static Plugin getPlugin() {
-        return plugin;
+    public static ArrayList<Plugin> getPlugins() {
+        return plugins;
     }
 
     public static String getHandlerName(final String name) {
-        return "pe-" + getSettings().getIdentifier() + "-" + name;
+        return "pe-" + nettyHandlerIdentifier + "-" + name;
     }
 
+    /**
+     * Get the PacketEvents settings.
+     *
+     * @return Configure some settings for the API
+     */
     public static PacketEventsSettings getSettings() {
         return settings;
     }
 
+    public static PEVersion getVersion() {
+        return version;
+    }
+
+    @EventHandler
+    public void onLogin(PlayerLoginEvent e) {
+        if (PacketEvents.getSettings().shouldInjectEarly()) {
+            assert getAPI().packetManager.tinyProtocol != null;
+            if (getAPI().packetManager.tinyProtocol.canInject(e.getPlayer())) {
+                getAPI().packetManager.injectPlayer(e.getPlayer());
+            }
+        }
+    }
+
     @EventHandler
     public void onJoin(final PlayerJoinEvent e) {
-        getAPI().getPlayerUtils().injectPlayer(e.getPlayer());
-        getAPI().getPlayerUtils().setClientVersion(e.getPlayer(), ClientVersion.fromProtocolVersion(VersionLookupUtils.getProtocolVersion(e.getPlayer())));
+        if (!VersionLookupUtils.hasHandledLoadedDependencies()) {
+            VersionLookupUtils.handleLoadedDependencies();
+        }
+        Object channel = NMSUtils.getChannel(e.getPlayer());
+        //Waiting for the BungeeCord server to send their plugin message with your version,
+        //So we leave bungee alone
+        if (!PacketEvents.getAPI().getServerUtils().isBungeeCordEnabled()) {
+            if (VersionLookupUtils.isDependencyAvailable()) {
+                ClientVersion version = ClientVersion.getClientVersion(VersionLookupUtils.getProtocolVersion(e.getPlayer()));
+                PacketEvents.getAPI().getPlayerUtils().clientVersionsMap.put(channel, version);
+            }
+        }
+        if (!PacketEvents.getSettings().shouldInjectEarly()) {
+            PacketEvents.getAPI().packetManager.injectPlayer(e.getPlayer());
+        }
     }
 
+
     @EventHandler
     public void onQuit(final PlayerQuitEvent e) {
-        getAPI().getPlayerUtils().clearClientVersion(e.getPlayer());
-        getAPI().getPlayerUtils().uninjectPlayerNow(e.getPlayer());
+        PacketEvents.getAPI().getPlayerUtils().ejectPlayer(e.getPlayer());
+        PacketEvents.getAPI().getPlayerUtils().clientVersionsMap.remove(e.getPlayer().getUniqueId());
     }
 
-    @EventHandler
-    public void onMove(final PlayerMoveEvent e) {
-        BukkitMoveEvent moveEvent = new BukkitMoveEvent(e);
-        getAPI().getEventManager().callEvent(moveEvent);
-        e.setCancelled(moveEvent.isCancelled());
+    private static String generateRandomNettyIdentifier() {
+        String alphabet = "abcdefghijklmnopqrstuvwxyz";
+        StringBuilder sb = new StringBuilder();
+        Random random = new Random();
+        while (sb.length() < 13) {
+            int index = (int) (random.nextFloat() * alphabet.length());
+            sb.append(alphabet.charAt(index));
+        }
+        return sb.toString();
     }
+
 }

src/main/java/io/github/retrooper/packetevents/PacketEventsAPI.java

@@ -0,0 +1,67 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents;
+
+import io.github.retrooper.packetevents.event.manager.EventManager;
+import io.github.retrooper.packetevents.packetmanager.PacketManager;
+import io.github.retrooper.packetevents.settings.PacketEventsSettings;
+import io.github.retrooper.packetevents.utils.player.PlayerUtils;
+import io.github.retrooper.packetevents.utils.server.ServerUtils;
+
+public final class PacketEventsAPI {
+    private final EventManager eventManager = new EventManager();
+    private final PlayerUtils playerUtils = new PlayerUtils();
+    private final ServerUtils serverUtils = new ServerUtils();
+    public PacketManager packetManager = null;
+
+    /**
+     * Get all utilities to do with the player
+     *
+     * @return Player Utilities
+     */
+    public PlayerUtils getPlayerUtils() {
+        return playerUtils;
+    }
+
+    /**
+     * Get all utilities to do with the server
+     *
+     * @return Server Utilities
+     */
+    public ServerUtils getServerUtils() {
+        return serverUtils;
+    }
+
+
+    /**
+     * Get the event manager
+     * Used to call events, register and unregister listeners
+     *
+     * @return PacketEvents' event manager
+     */
+    public EventManager getEventManager() {
+        return eventManager;
+    }
+}

src/main/java/io/github/retrooper/packetevents/annotations/Beta.java

@@ -0,0 +1,37 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.annotations;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * This annotation indicates that something might be unstable.
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Beta {
+}

src/main/java/io/github/retrooper/packetevents/annotations/NotNull.java

@@ -1,3 +1,27 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.annotations;
 
 
@@ -6,7 +30,7 @@ import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 
 /**
- * Is for sure not null.
+ * Guaranteed to not be null.
  */
 @Documented
 @Retention(RetentionPolicy.RUNTIME)

src/main/java/io/github/retrooper/packetevents/annotations/Nullable.java

@@ -1,3 +1,27 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.annotations;
 
 
@@ -6,7 +30,7 @@ import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 
 /**
- * Could be null.
+ * Possible that it is null.
  */
 @Documented
 @Retention(RetentionPolicy.RUNTIME)

src/main/java/io/github/retrooper/packetevents/annotations/PacketHandler.java

@@ -1,18 +0,0 @@
-package io.github.retrooper.packetevents.annotations;
-
-import io.github.retrooper.packetevents.enums.EventSynchronization;
-
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-
-@Target(ElementType.METHOD)
-@Retention(RetentionPolicy.RUNTIME)
-/**
- * Just like Bukkit's @EventHandler, but for PacketEvents' custom event system.
- * Make sure your class implements the PacketListener interface, and is registered when annotating your method with this annotation!
- */
-public @interface PacketHandler {
-    EventSynchronization synchronization() default EventSynchronization.NORMAL;
-}

src/main/java/io/github/retrooper/packetevents/api/PacketEventsAPI.java

@@ -1,66 +0,0 @@
-package io.github.retrooper.packetevents.api;
-
-import io.github.retrooper.packetevents.event.manager.EventManager;
-import io.github.retrooper.packetevents.utils.api.PlayerUtils;
-import io.github.retrooper.packetevents.utils.api.ServerUtils;
-
-public final class PacketEventsAPI {
-    private final EventManager eventManager = new EventManager();
-    private final PlayerUtils playerUtils = new PlayerUtils();
-    private final ServerUtils serverUtils = new ServerUtils();
-
-    /**
-     * Not thread safe
-     * Preciser than #currentMillis()
-     * Expensive
-     * Returns crazy values when you change system time
-     *
-     * @return {@link System#nanoTime()} / 1000000(1 million)
-     */
-    public long currentPreciseMillis() {
-        return System.nanoTime() / 1000000;
-    }
-
-    /**
-     * Thread safe
-     * Less precise compared to #currentPreciseMillis()
-     * Cheap
-     * Doesn't break when system time is changed
-     *
-     * @return {@link System#currentTimeMillis()}
-     */
-    public long currentMillis() {
-        return System.currentTimeMillis();
-    }
-
-    /**
-     * Get all utilities to do with the player
-     *
-     * @return Player Utilities
-     */
-    public PlayerUtils getPlayerUtils() {
-        return playerUtils;
-    }
-
-    /**
-     * Get all utilities to do with the server
-     *
-     * @return Server Utilities
-     */
-    public ServerUtils getServerUtils() {
-        return serverUtils;
-    }
-
-
-    /**
-     * Get the event manager
-     * Used to call events, register and unregister listeners
-     *
-     * @return PacketEvents' event manager
-     */
-    public EventManager getEventManager() {
-        return eventManager;
-    }
-
-
-}

src/main/java/io/github/retrooper/packetevents/bungee/BungeePluginMessageListener.java

@@ -0,0 +1,55 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.bungee;
+
+import com.google.common.io.ByteArrayDataInput;
+import com.google.common.io.ByteStreams;
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.github.retrooper.packetevents.utils.player.ClientVersion;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.messaging.PluginMessageListener;
+
+import java.util.UUID;
+
+public class BungeePluginMessageListener implements PluginMessageListener {
+    public static String tagName = "packetevents";
+
+    @Override
+    public void onPluginMessageReceived(String tag, Player player, byte[] bytes) {
+        if (tag.equals(tagName)) {
+            ByteArrayDataInput in = ByteStreams.newDataInput(bytes);
+            if (in.readUTF().equals("version")) {
+                String uuidString = in.readUTF();
+                Object channel = NMSUtils.getChannel(player);
+                short protocolVersion = in.readShort();
+                ClientVersion version = ClientVersion.getClientVersion(protocolVersion);
+                PacketEvents.getAPI().getPlayerUtils().clientVersionsMap.put(channel, version);
+            }
+        }
+    }
+
+
+}

src/main/java/io/github/retrooper/packetevents/enums/ClientVersion.java

@@ -1,106 +0,0 @@
-package io.github.retrooper.packetevents.enums;
-
-import io.github.retrooper.packetevents.PacketEvents;
-
-import java.util.HashMap;
-import java.util.Map;
-
-public enum ClientVersion {
-    LESS_THAN_V_1_7_10, v_1_7_10, v_1_8, v_1_9, v_1_9_1, v_1_9_2, v_1_9_3, v_1_10, v_1_11, v_1_11_1, v_1_12, v_1_12_1, v_1_12_2,
-    v_1_13, v_1_13_1, v_1_13_2, v_1_14, v_1_14_1, v_1_14_2, v_1_14_3, v_1_14_4, v_1_15_PRE_1, v_1_15_PRE_2, v_1_15_PRE_3, v_1_15_PRE_4, v_1_15_PRE_5, v_1_15_PRE_6, v_1_15_PRE_7,
-    v_1_15, v_1_15_1, v_1_15_2, v_1_16, v_1_16_PRE_1, v_1_16_PRE_2, v_1_16_PRE_3, v_1_16_PRE_4, v_1_16_PRE_5, v_1_16_PRE_6, v_1_16_PRE_7, v_1_16_PRE_8, v_1_16_RC_1, v_1_16_1, v_1_16_2, HIGHER_THAN_V_1_16_2, INVALID, ACCESS_FAILURE;
-
-    private static final Map<Integer, ClientVersion> VERSION_LOOKUP = new HashMap<Integer, ClientVersion>();
-
-    public static void prepareLookUp() {
-        VERSION_LOOKUP.put(-1, ACCESS_FAILURE);
-        VERSION_LOOKUP.put(1, LESS_THAN_V_1_7_10);
-        VERSION_LOOKUP.put(2, LESS_THAN_V_1_7_10);
-        VERSION_LOOKUP.put(3, LESS_THAN_V_1_7_10);
-        VERSION_LOOKUP.put(4, LESS_THAN_V_1_7_10);
-        VERSION_LOOKUP.put(5, v_1_7_10);
-        VERSION_LOOKUP.put(47, v_1_8);
-        VERSION_LOOKUP.put(107, v_1_9);
-        VERSION_LOOKUP.put(108, v_1_9_1);
-        VERSION_LOOKUP.put(109, v_1_9_2);
-        VERSION_LOOKUP.put(110, v_1_9_3);
-        VERSION_LOOKUP.put(210, v_1_10);
-        VERSION_LOOKUP.put(315, v_1_11);
-        VERSION_LOOKUP.put(316, v_1_11_1);
-        VERSION_LOOKUP.put(335, v_1_12);
-        VERSION_LOOKUP.put(338, v_1_12_1);
-        VERSION_LOOKUP.put(340, v_1_12_2);
-        VERSION_LOOKUP.put(393, v_1_13);
-        VERSION_LOOKUP.put(401, v_1_13_1);
-        VERSION_LOOKUP.put(404, v_1_13_2);
-        VERSION_LOOKUP.put(477, v_1_14);
-        VERSION_LOOKUP.put(480, v_1_14_1);
-        VERSION_LOOKUP.put(485, v_1_14_2);
-        VERSION_LOOKUP.put(490, v_1_14_3);
-        VERSION_LOOKUP.put(498, v_1_14_4);
-        VERSION_LOOKUP.put(565, v_1_15_PRE_1);
-        VERSION_LOOKUP.put(566, v_1_15_PRE_2);
-        VERSION_LOOKUP.put(567, v_1_15_PRE_3);
-        VERSION_LOOKUP.put(569, v_1_15_PRE_4);
-        VERSION_LOOKUP.put(570, v_1_15_PRE_5);
-        VERSION_LOOKUP.put(571, v_1_15_PRE_6);
-        VERSION_LOOKUP.put(572, v_1_15_PRE_7);
-        VERSION_LOOKUP.put(573, v_1_15);
-        VERSION_LOOKUP.put(575, v_1_15_1);
-        VERSION_LOOKUP.put(578, v_1_15_2);
-        VERSION_LOOKUP.put(721, v_1_16_PRE_1);
-        VERSION_LOOKUP.put(722, v_1_16_PRE_2);
-        VERSION_LOOKUP.put(725, v_1_16_PRE_3);
-        VERSION_LOOKUP.put(727, v_1_16_PRE_4);
-        VERSION_LOOKUP.put(729, v_1_16_PRE_5);
-        VERSION_LOOKUP.put(730, v_1_16_PRE_6);
-        VERSION_LOOKUP.put(732, v_1_16_PRE_7);
-        VERSION_LOOKUP.put(733, v_1_16_PRE_8);
-        VERSION_LOOKUP.put(734, v_1_16_RC_1);
-        VERSION_LOOKUP.put(735, v_1_16);
-        VERSION_LOOKUP.put(736, v_1_16_1);
-        VERSION_LOOKUP.put(737, v_1_16_2);
-    }
-
-    public static ClientVersion fromProtocolVersion(int protocolVersion) {
-        if (protocolVersion == -1 && PacketEvents.getSettings().doAutoResolveClientProtocolVersion()) {
-            protocolVersion = ServerVersion.getVersion().toProtocolVersion();
-        }
-        final ClientVersion lookedUp = VERSION_LOOKUP.get(protocolVersion);
-        if (lookedUp != null) {
-            return lookedUp;
-        }
-        return protocolVersion > 737 ? HIGHER_THAN_V_1_16_2 : INVALID;
-    }
-
-    /**
-     * Returns if the client's version is more up to date than the argument passed version
-     *
-     * @param version
-     * @return
-     */
-    public boolean isHigherThan(final ClientVersion version) {
-        if (this == version) return false;
-        return !isLowerThan(version);
-    }
-
-    /**
-     * Returns if the client's version is more outdated than the argument passed version
-     *
-     * @param version
-     * @return
-     */
-    public boolean isLowerThan(final ClientVersion version) {
-        if (this == version) return false;
-        final int len = ClientVersion.values().length;
-        for (byte i = 0; i < len; i++) {
-            final ClientVersion v = ClientVersion.values()[i];
-            if (v == this) {
-                return true;
-            } else if (v == version) {
-                return false;
-            }
-        }
-        return false;
-    }
-}

src/main/java/io/github/retrooper/packetevents/enums/Direction.java

@@ -1,3 +1,27 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.enums;
 
 public enum Direction {

src/main/java/io/github/retrooper/packetevents/enums/EventSynchronization.java

@@ -1,5 +0,0 @@
-package io.github.retrooper.packetevents.enums;
-
-public enum EventSynchronization {
-    NORMAL, FORCE_SYNC, FORCE_ASYNC
-}

src/main/java/io/github/retrooper/packetevents/enums/ServerVersion.java

@@ -1,143 +0,0 @@
-package io.github.retrooper.packetevents.enums;
-
-import io.github.retrooper.packetevents.PacketEvents;
-import org.bukkit.Bukkit;
-
-/**
- * @author retrooper
- */
-public enum ServerVersion {
-    v_1_7_10, v_1_8, v_1_8_3, v_1_8_8, v_1_9, v_1_9_4, v_1_10, v_1_11, v_1_12, v_1_13, v_1_13_2, v_1_14, v_1_15, v_1_16, v_1_16_1, v_1_16_2,
-    ERROR, EMPTY;
-
-    private static final String nmsVersionSuffix = Bukkit.getServer().getClass().getPackage().getName().replace(".", ",").split(",")[3];
-    public static ServerVersion[] reversedValues;
-    private static ServerVersion cachedVersion;
-
-    private static ServerVersion getVers() {
-        for (final ServerVersion val : reversedValues) {
-            String valName = val.name().substring(2).replace("_", ".");
-            if (Bukkit.getBukkitVersion().contains(valName)) {
-                return val;
-            } else if (PacketEvents.getSettings().getDefaultServerVersion() != null) {
-                return PacketEvents.getSettings().getDefaultServerVersion();
-            }
-        }
-        return ERROR;
-    }
-
-    public static ServerVersion getVersion() {
-        if (cachedVersion == null) {
-            cachedVersion = getVers();
-        }
-        return cachedVersion;
-    }
-
-
-    public static ServerVersion[] reverse(final ServerVersion[] arr) {
-        ServerVersion[] array = arr.clone();
-        if (array == null) {
-            return null;
-        }
-        int i = 0;
-        int j = array.length - 1;
-        ServerVersion tmp;
-        while (j > i) {
-            tmp = array[j];
-            array[j] = array[i];
-            array[i] = tmp;
-            j--;
-            i++;
-        }
-        return array;
-    }
-
-    public static String getNmsSuffix() {
-        return nmsVersionSuffix;
-    }
-
-    public static String getNMSDirectory() {
-        return "net.minecraft.server." + getNmsSuffix();
-    }
-
-    public static String getOBCDirectory() {
-        return "org.bukkit.craftbukkit." + getNmsSuffix();
-    }
-
-    /**
-     * Returns if the current version is more up to date than the argument passed version
-     *
-     * @param version
-     * @return
-     */
-    public boolean isHigherThan(final ServerVersion version) {
-        if (this == version) return false;
-        return !isLowerThan(version);
-    }
-
-    /**
-     * Returns if the current version is more outdated than the argument passed version
-     *
-     * @param version
-     * @return
-     */
-    public boolean isLowerThan(final ServerVersion version) {
-        if (this == version) return false;
-        final int len = ServerVersion.values().length;
-        for (byte i = 0; i < len; i++) {
-            final ServerVersion v = ServerVersion.values()[i];
-            if (v == this) {
-                return true;
-            } else if (v == version) {
-                return false;
-            }
-        }
-        return false;
-    }
-
-    public int toProtocolVersion() {
-        if (this.equals(ServerVersion.v_1_7_10)) {
-            return 5;
-        }
-        if (this.name().startsWith("v_1_8")) {
-            return 47;
-        }
-        if (this.equals(ServerVersion.v_1_9)) {
-            return 107;
-        }
-        if (this.equals(ServerVersion.v_1_9_4)) {
-            return 110;
-        }
-        if (this.equals(ServerVersion.v_1_10)) {
-            return 210;
-        }
-        if (this.equals(ServerVersion.v_1_11)) {
-            return 315;
-        }
-        if (this.equals(ServerVersion.v_1_12)) {
-            return 335;
-        }
-        if (this.equals(ServerVersion.v_1_13)) {
-            return 393;
-        }
-        if (this.equals(ServerVersion.v_1_13_2)) {
-            return 404;
-        }
-        if (this.equals(ServerVersion.v_1_14)) {
-            return 477;
-        }
-        if (this.equals(ServerVersion.v_1_15)) {
-            return 573;
-        }
-        if (this.equals(ServerVersion.v_1_16)) {
-            return 735;
-        }
-        if (this.equals(ServerVersion.v_1_16_1)) {
-            return 736;
-        }
-        if (this.equals(ServerVersion.v_1_16_2)) {
-            return 737;
-        }
-        return -1;
-    }
-}

src/main/java/io/github/retrooper/packetevents/enums/SystemOS.java

@@ -1,32 +0,0 @@
-package io.github.retrooper.packetevents.enums;
-
-public enum SystemOS {
-    WINDOWS, MACOS, LINUX, OTHER;
-
-    private static SystemOS value;
-
-    private static SystemOS getOS() {
-        final String os = System.getProperty("os.name");
-        for (final String osName : getOperatingSystemNames()) {
-            if (os.toLowerCase().contains(osName.toLowerCase())) {
-                return SystemOS.valueOf(osName);
-            }
-        }
-        return OTHER;
-    }
-
-    public static SystemOS getOperatingSystem() {
-        if (value == null) {
-            value = getOS();
-        }
-        return value;
-    }
-
-    public static String[] getOperatingSystemNames() {
-        final String[] arr = new String[values().length - 1];
-        for (int i = 0; i < values().length - 1; i++) {
-            arr[i] = values()[i].name();
-        }
-        return arr;
-    }
-}

src/main/java/io/github/retrooper/packetevents/enums/minecraft/EntityAnimationType.java

@@ -1,19 +0,0 @@
-package io.github.retrooper.packetevents.enums.minecraft;
-
-public enum EntityAnimationType {
-    SWING_MAIN_ARM, DAMAGE, LEAVE_BED, SWING_OFFHAND, CRITICAL_EFFECT, MAGIC_CRITICAL_EFFECT;
-
-    public static final EntityAnimationType get(final int i) {
-        return values()[i];
-    }
-
-    public final int getIndex() {
-        for (int i = 0; i < values().length; i++) {
-            final EntityAnimationType curType = values()[0];
-            if (curType == this) {
-                return i;
-            }
-        }
-        return -1;
-    }
-}

src/main/java/io/github/retrooper/packetevents/enums/minecraft/EntityUseAction.java

@@ -1,9 +0,0 @@
-package io.github.retrooper.packetevents.enums.minecraft;
-
-public enum EntityUseAction {
-    INTERACT, INTERACT_AT, ATTACK, INVALID;
-
-    public static EntityUseAction get(final int i) {
-        return values()[i];
-    }
-}

src/main/java/io/github/retrooper/packetevents/enums/minecraft/Gamemode.java

@@ -1,25 +0,0 @@
-package io.github.retrooper.packetevents.enums.minecraft;
-
-public enum Gamemode {
-    NOT_SET(-1, ""),
-    SURVIVAL(0, "survival"),
-    CREATIVE(1, "creative"),
-    ADVENTURE(2, "adventure"),
-    SPECTATOR(3, "spectator");
-
-    int f;
-    String g;
-
-    Gamemode(int var3, String var4) {
-        this.f = var3;
-        this.g = var4;
-    }
-
-    public int getId() {
-        return this.f;
-    }
-
-    public String b() {
-        return this.g;
-    }
-}

src/main/java/io/github/retrooper/packetevents/enums/minecraft/Hand.java

@@ -1,6 +0,0 @@
-package io.github.retrooper.packetevents.enums.minecraft;
-
-public enum Hand {
-    MAIN_HAND,
-    OFF_HAND
-}

src/main/java/io/github/retrooper/packetevents/enums/minecraft/PlayerAction.java

@@ -1,59 +0,0 @@
-package io.github.retrooper.packetevents.enums.minecraft;
-
-public enum PlayerAction {
-    START_SNEAKING,
-
-    STOP_SNEAKING,
-
-    STOP_SLEEPING,
-
-    START_SPRINTING,
-
-    STOP_SPRINTING,
-
-    START_RIDING_JUMP,
-
-    STOP_RIDING_JUMP,
-
-    OPEN_INVENTORY,
-
-    START_FALL_FLYING;
-
-    public static PlayerAction get(final int i) {
-        return values()[i];
-    }
-
-    public int getIndex() {
-        for (int i = 0; i < values().length; i++) {
-            final PlayerAction action = values()[i];
-            if (action == this) {
-                return i;
-            }
-        }
-        return -1;
-    }
-
-    public enum UpdatedPlayerAction {
-        PRESS_SHIFT_KEY, RELEASE_SHIFT_KEY, STOP_SLEEPING, START_SPRINTING, STOP_SPRINTING, START_RIDING_JUMP, STOP_RIDING_JUMP, OPEN_INVENTORY, START_FALL_FLYING;
-
-        public static UpdatedPlayerAction get(final int index) {
-            for (int i = 0; i < index + 1; i++) {
-                final UpdatedPlayerAction action = values()[i];
-                if (i == index) {
-                    return action;
-                }
-            }
-            return null;
-        }
-
-        public int getIndex() {
-            for (int i = 0; i < values().length; i++) {
-                final UpdatedPlayerAction action = values()[i];
-                if (action == this) {
-                    return i;
-                }
-            }
-            return -1;
-        }
-    }
-}

src/main/java/io/github/retrooper/packetevents/enums/minecraft/PlayerDigType.java

@@ -1,26 +0,0 @@
-package io.github.retrooper.packetevents.enums.minecraft;
-
-public enum PlayerDigType {
-
-    START_DESTROY_BLOCK,
-
-    ABORT_DESTROY_BLOCK,
-
-    STOP_DESTROY_BLOCK,
-
-    DROP_ALL_ITEMS,
-
-    DROP_ITEM,
-
-    RELEASE_USE_ITEM,
-
-    SWAP_HELD_ITEMS,
-
-    SWAP_ITEM_WITH_OFFHAND,
-
-    WRONG_PACKET;
-
-    public static PlayerDigType get(final int i) {
-        return values()[i];
-    }
-}

src/main/java/io/github/retrooper/packetevents/enums/minecraft/PlayerInfoAction.java

@@ -1,8 +0,0 @@
-package io.github.retrooper.packetevents.enums.minecraft;
-
-public enum PlayerInfoAction {
-    ADD_PLAYER, UPDATE_GAME_MODE, UPDATE_LATENCY, UPDATE_DISPLAY_NAME, REMOVE_PLAYER;
-
-    PlayerInfoAction() {
-    }
-}

src/main/java/io/github/retrooper/packetevents/event/PacketEvent.java

@@ -1,16 +1,43 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.event;
 
 
-import io.github.retrooper.packetevents.enums.ServerVersion;
+import io.github.retrooper.packetevents.utils.server.ServerVersion;
 
-public class PacketEvent {
-    protected static ServerVersion version = ServerVersion.getVersion();
+/**
+ * An event in the PacketEvents EventManager system.
+ */
+public abstract class PacketEvent {
+    public static ServerVersion version;
     private long timestamp = System.currentTimeMillis();
 
     /**
      * Timestamp of the packet
      *
-     * @return
+     * @return timestamp in milliseconds
      */
     public long getTimestamp() {
         return timestamp;
@@ -19,4 +46,4 @@ public class PacketEvent {
     public void setTimestamp(long timestamp) {
         this.timestamp = timestamp;
     }
-}
+}

src/main/java/io/github/retrooper/packetevents/event/PacketListener.java

@@ -1,4 +1,32 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.event;
 
+/**
+ * A Packet listener.
+ * Implement this interface in your listeners.
+ */
 public interface PacketListener {
 }

src/main/java/io/github/retrooper/packetevents/event/annotation/PacketHandler.java

@@ -0,0 +1,39 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.event.annotation;
+
+import io.github.retrooper.packetevents.event.priority.PacketEventPriority;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.METHOD)
+@Retention(RetentionPolicy.RUNTIME)
+
+public @interface PacketHandler {
+    byte priority() default PacketEventPriority.NORMAL;
+}

src/main/java/io/github/retrooper/packetevents/event/eventtypes/CancellableEvent.java

@@ -0,0 +1,56 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.event.eventtypes;
+
+/**
+ * This indicates that it is possible to cancel an event,
+ * which should result in cancelling the planned action.
+ */
+public interface CancellableEvent {
+
+    /**
+     * Has the event been cancelled?
+     * @return is event cancelled
+     */
+    boolean isCancelled();
+
+    /**
+     * Cancel or proceed with the event.
+     * @param val
+     */
+    void setCancelled(boolean val);
+
+    /**
+     * Cancel the event.
+     * You can achieve the same result by just using {@link #setCancelled(boolean)}
+     */
+    void cancel();
+
+    /**
+     * Uncancel the event.
+     * You can achieve the same result by just using {@link #setCancelled(boolean)}
+     */
+    void uncancel();
+}

src/main/java/io/github/retrooper/packetevents/event/eventtypes/PlayerEvent.java

@@ -0,0 +1,37 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.event.eventtypes;
+
+import org.bukkit.entity.Player;
+
+/**
+ * Event having to do with a player.
+ */
+public interface PlayerEvent {
+    /**
+     * Associated player.
+     */
+    Player getPlayer();
+}

src/main/java/io/github/retrooper/packetevents/event/impl/BukkitMoveEvent.java

@@ -1,48 +0,0 @@
-package io.github.retrooper.packetevents.event.impl;
-
-import io.github.retrooper.packetevents.event.PacketEvent;
-import org.bukkit.Location;
-import org.bukkit.entity.Player;
-import org.bukkit.event.player.PlayerMoveEvent;
-
-public final class BukkitMoveEvent extends PacketEvent {
-    private final Player player;
-    private final Location to, from;
-    private boolean cancelled;
-
-    public BukkitMoveEvent(final Player player, final Location to, final Location from) {
-        this.player = player;
-        this.to = to;
-        this.from = from;
-    }
-
-    public BukkitMoveEvent(final PlayerMoveEvent e) {
-        this.player = e.getPlayer();
-        this.to = e.getTo();
-        this.from = e.getFrom();
-    }
-
-    public Player getPlayer() {
-        return player;
-    }
-
-    public Location getFrom() {
-        return from;
-    }
-
-    public Location getTo() {
-        return to;
-    }
-
-    public boolean isCancelled() {
-        return cancelled;
-    }
-
-    public void setCancelled(final boolean val) {
-        this.cancelled = val;
-    }
-
-    public void cancel() {
-        setCancelled(true);
-    }
-}

src/main/java/io/github/retrooper/packetevents/event/impl/PacketLoginEvent.java

@@ -0,0 +1,96 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.event.impl;
+
+import io.github.retrooper.packetevents.event.PacketEvent;
+import io.github.retrooper.packetevents.event.eventtypes.CancellableEvent;
+import io.github.retrooper.packetevents.packettype.PacketType;
+import io.github.retrooper.packetevents.utils.reflection.ClassUtil;
+
+/**
+ * This event is called when we receive a login packet.
+ */
+public class PacketLoginEvent extends PacketEvent implements CancellableEvent {
+    private final Object channel;
+    private final Object packet;
+    private boolean cancelled;
+
+    public PacketLoginEvent(final Object channel, final Object packet) {
+        this.channel = channel;
+        this.packet = packet;
+    }
+
+    public Object getChannel() {
+        return channel;
+    }
+
+    /**
+     * Get the packet's name (NMS packet class simple name).
+     * The class simple name is cached.
+     *
+     * @return Name of the packet
+     */
+    public String getPacketName() {
+        return ClassUtil.getClassSimpleName(packet.getClass());
+    }
+
+    /**
+     * Get the raw packet object
+     *
+     * @return packet object
+     */
+    public Object getNMSPacket() {
+        return packet;
+    }
+
+    /**
+     * Get the ID of the packet
+     *
+     * @return packet id
+     */
+    public byte getPacketId() {
+        return PacketType.Login.packetIds.getOrDefault(packet.getClass(), (byte) -1);
+    }
+
+    @Override
+    public void cancel() {
+        cancelled = true;
+    }
+
+    @Override
+    public void uncancel() {
+        cancelled = false;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean value) {
+        cancelled = value;
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/impl/PacketReceiveEvent.java

@@ -1,10 +1,40 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.event.impl;
 
+import io.github.retrooper.packetevents.event.eventtypes.CancellableEvent;
 import io.github.retrooper.packetevents.event.PacketEvent;
-import io.github.retrooper.packetevents.packet.PacketType;
+import io.github.retrooper.packetevents.event.eventtypes.PlayerEvent;
+import io.github.retrooper.packetevents.packettype.PacketType;
+import io.github.retrooper.packetevents.utils.reflection.ClassUtil;
 import org.bukkit.entity.Player;
 
-public final class PacketReceiveEvent extends PacketEvent {
+/**
+ * This event is called each time a packet is received from a client.
+ */
+public final class PacketReceiveEvent extends PacketEvent implements CancellableEvent, PlayerEvent {
     private final Player player;
     private final Object packet;
     private boolean cancelled;
@@ -15,67 +45,57 @@ public final class PacketReceiveEvent extends PacketEvent {
     }
 
     /**
-     * Get the player sending the packet
-     *
-     * @return
+     * Get the packet sender
+     * @return player
      */
+    @Override
     public Player getPlayer() {
-        return this.player;
+        return player;
     }
 
     /**
      * Get the packet's name (NMS packet class simple name).
-     * Deprecated, it is recommended not to use this for performance reasons.
+     * The class simple name is cached.
+     * @return Name of the packet
      */
-    @Deprecated
     public String getPacketName() {
-        return this.packet.getClass().getSimpleName();
+        return ClassUtil.getClassSimpleName(packet.getClass());
     }
 
     /**
-     * Get the NMS packet object
-     *
+     * Get the raw packet object
      * @return packet object
      */
     public Object getNMSPacket() {
-        return this.packet;
-    }
-
-    /**
-     * Get the class of the NMS packet object
-     * Deprecated, as it is useless, rather use getNMSPacket().getClass()
-     *
-     * @return packet object class
-     */
-    @Deprecated
-    public Class<?> getNMSPacketClass() {
-        return packet.getClass();
+        return packet;
     }
 
     /**
      * Get the ID of the packet
-     *
      * @return packet id
      */
     public byte getPacketId() {
         return PacketType.Client.packetIds.getOrDefault(packet.getClass(), (byte) -1);
     }
 
-    /**
-     * Returns if the packet has been cancelled
-     *
-     * @return cancelled
-     */
+    @Override
+    public void cancel() {
+        cancelled = true;
+    }
+
+    @Override
+    public void uncancel() {
+        cancelled = false;
+    }
+
+    @Override
     public boolean isCancelled() {
         return cancelled;
     }
 
-    /**
-     * Cancel the packet
-     *
-     * @param cancelled
-     */
-    public void setCancelled(boolean cancelled) {
-        this.cancelled = cancelled;
+    @Override
+    public void setCancelled(boolean value) {
+        cancelled = value;
     }
+
 }

src/main/java/io/github/retrooper/packetevents/event/impl/PacketSendEvent.java

@@ -1,11 +1,40 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.event.impl;
 
+import io.github.retrooper.packetevents.event.eventtypes.CancellableEvent;
 import io.github.retrooper.packetevents.event.PacketEvent;
-import io.github.retrooper.packetevents.packet.PacketType;
+import io.github.retrooper.packetevents.event.eventtypes.PlayerEvent;
+import io.github.retrooper.packetevents.packettype.PacketType;
+import io.github.retrooper.packetevents.utils.reflection.ClassUtil;
 import org.bukkit.entity.Player;
 
-
-public final class PacketSendEvent extends PacketEvent {
+/**
+ * This event is called each time the server sends a packet to the client.
+ */
+public final class PacketSendEvent extends PacketEvent implements CancellableEvent, PlayerEvent {
     private final Player player;
     private final Object packet;
     private boolean cancelled;
@@ -16,18 +45,18 @@ public final class PacketSendEvent extends PacketEvent {
         this.cancelled = false;
     }
 
-
+    @Override
     public Player getPlayer() {
-        return this.player;
+        return player;
     }
 
     /**
-     * Get the packet's name (NMS packet class simple name)
-     * Deprecated, it is recommended not to use this for performance reasons.
+     * Get the packet's name (NMS packet class simple name).
+     * The class simple name is cached.
+     * @return Name of the packet
      */
-    @Deprecated
     public String getPacketName() {
-        return this.packet.getClass().getSimpleName();
+        return ClassUtil.getClassSimpleName(packet.getClass());
     }
 
     /**
@@ -45,26 +74,27 @@ public final class PacketSendEvent extends PacketEvent {
      * @return packet object
      */
     public Object getNMSPacket() {
-        return this.packet;
+        return packet;
     }
 
-    /**
-     * Get the class of the NMS packet object.
-     * Deprecated because it is useless, rather use getNMSPacket().getClass().
-     *
-     * @return packet object class
-     */
-    @Deprecated
-    public Class<?> getNMSPacketClass() {
-        return packet.getClass();
+    @Override
+    public void cancel() {
+        cancelled = true;
     }
 
+    @Override
+    public void uncancel() {
+        cancelled = false;
+    }
+
+    @Override
     public boolean isCancelled() {
         return cancelled;
     }
 
-    public void setCancelled(boolean cancelled) {
-        this.cancelled = cancelled;
+    @Override
+    public void setCancelled(boolean value) {
+        cancelled = value;
     }
 }
 

src/main/java/io/github/retrooper/packetevents/event/impl/PacketStatusEvent.java

@@ -0,0 +1,93 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.event.impl;
+
+import io.github.retrooper.packetevents.event.PacketEvent;
+import io.github.retrooper.packetevents.event.eventtypes.CancellableEvent;
+import io.github.retrooper.packetevents.packettype.PacketType;
+import io.github.retrooper.packetevents.utils.reflection.ClassUtil;
+
+public class PacketStatusEvent extends PacketEvent implements CancellableEvent {
+    private final Object channel;
+    private final Object packet;
+    private boolean cancelled;
+
+    public PacketStatusEvent(final Object channel, final Object packet) {
+        this.channel = channel;
+        this.packet = packet;
+    }
+
+    public Object getChannel() {
+        return channel;
+    }
+
+    /**
+     * Get the packet's name (NMS packet class simple name).
+     * The class simple name is cached.
+     *
+     * @return Name of the packet
+     */
+    public String getPacketName() {
+        return ClassUtil.getClassSimpleName(packet.getClass());
+    }
+
+    /**
+     * Get the raw packet object
+     *
+     * @return packet object
+     */
+    public Object getNMSPacket() {
+        return packet;
+    }
+
+    /**
+     * Get the ID of the packet
+     *
+     * @return packet id
+     */
+    public byte getPacketId() {
+        return PacketType.Status.packetIds.getOrDefault(packet.getClass(), (byte) -1);
+    }
+
+    @Override
+    public void cancel() {
+        cancelled = true;
+    }
+
+    @Override
+    public void uncancel() {
+        cancelled = false;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean value) {
+        cancelled = value;
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/impl/PlayerEjectEvent.java

@@ -0,0 +1,78 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.event.impl;
+
+import io.github.retrooper.packetevents.event.eventtypes.CancellableEvent;
+import io.github.retrooper.packetevents.event.PacketEvent;
+import io.github.retrooper.packetevents.event.eventtypes.PlayerEvent;
+import org.bukkit.entity.Player;
+
+/**
+ * This event is called each time you eject a player.
+ */
+public final class PlayerEjectEvent extends PacketEvent implements CancellableEvent, PlayerEvent {
+    private final Player player;
+    private final boolean async;
+    private boolean cancelled;
+
+    public PlayerEjectEvent(final Player player, final boolean isAsync) {
+        this.player = player;
+        this.async = isAsync;
+    }
+
+    public PlayerEjectEvent(final Player player) {
+        this.player = player;
+        this.async = true; //default value
+    }
+
+    @Override
+    public void cancel() {
+        cancelled = true;
+    }
+
+    @Override
+    public void uncancel() {
+        cancelled = false;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean value) {
+        cancelled = value;
+    }
+
+    @Override
+    public Player getPlayer() {
+        return player;
+    }
+
+    public boolean isAsync() {
+        return async;
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/impl/PlayerInjectEvent.java

@@ -1,29 +1,77 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.event.impl;
 
+import io.github.retrooper.packetevents.event.eventtypes.CancellableEvent;
 import io.github.retrooper.packetevents.event.PacketEvent;
+import io.github.retrooper.packetevents.event.eventtypes.PlayerEvent;
 import org.bukkit.entity.Player;
 
-public final class PlayerInjectEvent extends PacketEvent {
+/**
+ * This event is called each time you inject a player.
+ */
+public final class PlayerInjectEvent extends PacketEvent implements CancellableEvent, PlayerEvent {
     private final Player player;
+    private final boolean async;
     private boolean cancelled;
 
     public PlayerInjectEvent(final Player player) {
-        this.player = player;
+        this(player, false);
     }
 
+    public PlayerInjectEvent(final Player player, boolean isAsync) {
+        this.player= player;
+        this.async = isAsync;
+    }
+
+    @Override
+    public void cancel() {
+        cancelled = true;
+    }
+
+    @Override
+    public void uncancel() {
+        cancelled = false;
+    }
+
+    @Override
     public boolean isCancelled() {
         return cancelled;
     }
 
-    public void setCancelled(boolean cancelled) {
-        this.cancelled = cancelled;
-    }
-
-    public void cancel() {
-        setCancelled(true);
+    @Override
+    public void setCancelled(boolean value) {
+        cancelled = value;
     }
 
+    @Override
     public Player getPlayer() {
         return player;
     }
+
+    public boolean isAsync() {
+        return async;
+    }
 }

src/main/java/io/github/retrooper/packetevents/event/impl/PlayerUninjectEvent.java

@@ -1,50 +0,0 @@
-package io.github.retrooper.packetevents.event.impl;
-
-import io.github.retrooper.packetevents.event.PacketEvent;
-import org.bukkit.entity.Player;
-
-public final class PlayerUninjectEvent extends PacketEvent {
-    private final Player player;
-    private final boolean sync;
-    private boolean cancelled;
-
-    @Deprecated
-    public PlayerUninjectEvent(final Player player, @Deprecated final boolean sync) {
-        this.player = player;
-        this.sync = sync;
-    }
-
-    public PlayerUninjectEvent(final Player player) {
-        this.player = player;
-        this.sync = true;
-    }
-
-    public void cancel() {
-        setCancelled(true);
-    }
-
-    public boolean isCancelled() {
-        return this.cancelled;
-    }
-
-    public void setCancelled(final boolean val) {
-        this.cancelled = val;
-    }
-
-    /**
-     * Whether the uninjection was called synchronously or asynchronously.
-     * The event is still called synchronously.
-     * By default all uninjections are called aynchronously in this build.
-     *
-     * @return If the uninjection was done async or sync
-     * @deprecated because it is unneeded
-     */
-    @Deprecated
-    public boolean isSync() {
-        return sync;
-    }
-
-    public Player getPlayer() {
-        return player;
-    }
-}

src/main/java/io/github/retrooper/packetevents/event/impl/PostPacketReceiveEvent.java

@@ -0,0 +1,75 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.event.impl;
+
+import io.github.retrooper.packetevents.event.PacketEvent;
+import io.github.retrooper.packetevents.event.eventtypes.PlayerEvent;
+import io.github.retrooper.packetevents.packettype.PacketType;
+import io.github.retrooper.packetevents.utils.reflection.ClassUtil;
+import org.bukkit.entity.Player;
+
+public class PostPacketReceiveEvent extends PacketEvent implements PlayerEvent {
+    private final Player player;
+    private final Object packet;
+
+    public PostPacketReceiveEvent(final Player player, final Object packet) {
+        this.player = player;
+        this.packet = packet;
+    }
+
+    /**
+     * Get the packet sender
+     * @return player
+     */
+    @Override
+    public Player getPlayer() {
+        return player;
+    }
+
+    /**
+     * Get the packet's name (NMS packet class simple name).
+     * The class simple name is cached.
+     * @return Name of the packet
+     */
+    public String getPacketName() {
+        return ClassUtil.getClassSimpleName(packet.getClass());
+    }
+
+    /**
+     * Get the raw packet object
+     * @return packet object
+     */
+    public Object getNMSPacket() {
+        return packet;
+    }
+
+    /**
+     * Get the ID of the packet
+     * @return packet id
+     */
+    public byte getPacketId() {
+        return PacketType.Client.packetIds.getOrDefault(packet.getClass(), (byte) -1);
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/impl/PostPacketSendEvent.java

@@ -0,0 +1,75 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.event.impl;
+
+import io.github.retrooper.packetevents.event.PacketEvent;
+import io.github.retrooper.packetevents.event.eventtypes.PlayerEvent;
+import io.github.retrooper.packetevents.packettype.PacketType;
+import io.github.retrooper.packetevents.utils.reflection.ClassUtil;
+import org.bukkit.entity.Player;
+
+public class PostPacketSendEvent extends PacketEvent implements PlayerEvent {
+    private final Player player;
+    private final Object packet;
+
+    public PostPacketSendEvent(final Player player, final Object packet) {
+        this.player = player;
+        this.packet = packet;
+    }
+
+    /**
+     * Get the packet sender
+     * @return player
+     */
+    @Override
+    public Player getPlayer() {
+        return player;
+    }
+
+    /**
+     * Get the packet's name (NMS packet class simple name).
+     * The class simple name is cached.
+     * @return Name of the packet
+     */
+    public String getPacketName() {
+        return ClassUtil.getClassSimpleName(packet.getClass());
+    }
+
+    /**
+     * Get the raw packet object
+     * @return packet object
+     */
+    public Object getNMSPacket() {
+        return packet;
+    }
+
+    /**
+     * Get the ID of the packet
+     * @return packet id
+     */
+    public byte getPacketId() {
+        return PacketType.Server.packetIds.getOrDefault(packet.getClass(), (byte) -1);
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/manager/EventManager.java

@@ -1,70 +1,97 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.event.manager;
 
 import io.github.retrooper.packetevents.PacketEvents;
-import io.github.retrooper.packetevents.annotations.PacketHandler;
+import io.github.retrooper.packetevents.event.annotation.PacketHandler;
+import io.github.retrooper.packetevents.event.eventtypes.CancellableEvent;
 import io.github.retrooper.packetevents.event.PacketEvent;
 import io.github.retrooper.packetevents.event.PacketListener;
-import org.bukkit.Bukkit;
+import io.github.retrooper.packetevents.event.priority.PacketEventPriority;
+import io.github.retrooper.packetevents.utils.protocollib.ProtocolLibListener;
+import io.github.retrooper.packetevents.utils.protocollib.ProtocolLibUtils;
 
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentLinkedQueue;
 
 public final class EventManager {
-    private final HashMap<PacketListener, List<Method>> registeredMethods = new HashMap<PacketListener, List<Method>>();
+    private final ConcurrentHashMap<PacketListener, ConcurrentLinkedQueue<Method>> registeredMethods = new ConcurrentHashMap<>();
 
     public void callEvent(final PacketEvent e) {
         for (final PacketListener listener : registeredMethods.keySet()) {
-            //Annotated methods
-            final List<Method> methods = registeredMethods.get(listener);
-            for (final Method method : methods) {
-                final Class<?> parameterType = method.getParameterTypes()[0];
+            ConcurrentLinkedQueue<Method> methods = registeredMethods.get(listener);
+            final boolean[] isCancelled = {false};
+            final byte[] eventPriority = {PacketEventPriority.LOWEST};
+            for (Method method : methods) {
+                Class<?> parameterType = method.getParameterTypes()[0];
                 if (parameterType.equals(PacketEvent.class)
                         || parameterType.isInstance(e)) {
-                    final PacketHandler annotation = method.getAnnotation(PacketHandler.class);
-                    final Runnable invokeMethod = new Runnable() {
-                        @Override
-                        public void run() {
-                            try {
-                                method.invoke(listener, e);
-                            } catch (IllegalAccessException | InvocationTargetException ex) {
-                                ex.printStackTrace();
-                            }
-                        }
-                    };
 
-                    switch (annotation.synchronization()) {
-                        case FORCE_ASYNC:
-                            Bukkit.getScheduler().runTaskAsynchronously(PacketEvents.getPlugin(), invokeMethod);
-                            break;
-                        case FORCE_SYNC:
-                            Bukkit.getScheduler().runTask(PacketEvents.getPlugin(), invokeMethod);
-                            break;
-                        default:
-                            try {
-                                method.invoke(listener, e);
-                            } catch (IllegalAccessException | InvocationTargetException ex) {
-                                ex.printStackTrace();
-                            }
-                            break;
+                    PacketHandler annotation = method.getAnnotation(PacketHandler.class);
+                    try {
+                        method.invoke(listener, e);
+                    } catch (IllegalAccessException | InvocationTargetException ex) {
+                        ex.printStackTrace();
+                    }
+                    if (e instanceof CancellableEvent) {
+                        CancellableEvent ce = (CancellableEvent) e;
+                        if (annotation.priority() >= eventPriority[0]) {
+                            eventPriority[0] = annotation.priority();
+                            isCancelled[0] = ce.isCancelled();
+                        }
+                    }
+                    if (e instanceof CancellableEvent) {
+                        CancellableEvent cancellableEvent = (CancellableEvent) e;
+                        cancellableEvent.setCancelled(isCancelled[0]);
                     }
                 }
             }
         }
     }
 
-    public void registerListener(final PacketListener e) {
-        final List<Method> methods = new ArrayList<Method>();
-        for (final Method m : e.getClass().getMethods()) {
+    public void registerListener(final PacketListener listener) {
+        final ConcurrentLinkedQueue<Method> methods = new ConcurrentLinkedQueue<>();
+        for (final Method m : listener.getClass().getDeclaredMethods()) {
+            if(!m.isAccessible()) {
+                m.setAccessible(true);
+            }
             if (m.isAnnotationPresent(PacketHandler.class)
                     && m.getParameterTypes().length == 1) {
                 methods.add(m);
             }
         }
+
         if (!methods.isEmpty()) {
-            registeredMethods.put(e, methods);
+            if (ProtocolLibUtils.isAvailable()
+                    && PacketEvents.getSettings().shouldUseProtocolLibIfAvailable()) {
+                ProtocolLibListener.registerProtocolLibListener(listener, methods);
+            } else {
+                registeredMethods.put(listener, methods);
+            }
         }
     }
 

src/main/java/io/github/retrooper/packetevents/event/priority/PacketEventPriority.java

@@ -0,0 +1,34 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.event.priority;
+
+public interface PacketEventPriority {
+    byte LOWEST = 0;
+    byte LOW = 1;
+    byte NORMAL = 2;
+    byte HIGH = 3;
+    byte HIGHEST = 4;
+    byte MONITOR = 5;
+}

src/main/java/io/github/retrooper/packetevents/example/MainExample.java

@@ -1,13 +1,39 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.example;
 
 import io.github.retrooper.packetevents.PacketEvents;
-import io.github.retrooper.packetevents.annotations.PacketHandler;
-import io.github.retrooper.packetevents.enums.EventSynchronization;
 import io.github.retrooper.packetevents.event.PacketListener;
+import io.github.retrooper.packetevents.event.annotation.PacketHandler;
+import io.github.retrooper.packetevents.event.impl.PacketReceiveEvent;
 import io.github.retrooper.packetevents.event.impl.PacketSendEvent;
-import io.github.retrooper.packetevents.packet.PacketType;
-import io.github.retrooper.packetevents.packetwrappers.out.entity.WrappedPacketOutEntity;
-import org.bukkit.entity.Entity;
+import io.github.retrooper.packetevents.event.impl.PlayerInjectEvent;
+import io.github.retrooper.packetevents.packettype.PacketType;
+import io.github.retrooper.packetevents.packetwrappers.out.animation.WrappedPacketOutAnimation;
+import io.github.retrooper.packetevents.packetwrappers.out.explosion.WrappedPacketOutExplosion;
+import io.github.retrooper.packetevents.utils.server.ServerVersion;
 import org.bukkit.plugin.java.JavaPlugin;
 
 public class MainExample extends JavaPlugin implements PacketListener {
@@ -19,20 +45,16 @@ public class MainExample extends JavaPlugin implements PacketListener {
 
     @Override
     public void onEnable() {
-        //Make sure you set a unique identifier, if another present plugin has the same identifier, you could run into issues
-        PacketEvents.getSettings().setIdentifier("official_api");
+        PacketEvents.getSettings().injectAsync(true).ejectAsync(true)
+                .backupServerVersion(ServerVersion.v_1_7_10).
+                useProtocolLibIfAvailable(true).checkForUpdates(true).injectEarly(true);
+        PacketEvents.getAPI().getEventManager().registerListener(this);
+        PacketEvents.init(this);
 
-        PacketEvents.start(this);
-        //If PacketEvents cannot detect your server version, it will use the default you specify version
-        // getAPI().getSettings().setDefaultServerVersion(ServerVersion.v_1_7_10);
-
-
-       // PacketEvents.getAPI().getEventManager().registerListeners(this);
     }
 
     @Override
     public void onDisable() {
         PacketEvents.stop();
     }
-
 }

src/main/java/io/github/retrooper/packetevents/exceptions/WrapperFieldNotFoundException.java

@@ -0,0 +1,37 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.exceptions;
+
+import io.github.retrooper.packetevents.utils.reflection.ClassUtil;
+
+public class WrapperFieldNotFoundException extends RuntimeException{
+    public WrapperFieldNotFoundException(String message) {
+        super(message);
+    }
+
+    public WrapperFieldNotFoundException(Class<?> packetClass, Class<?> type, int index) {
+        this("PacketEvents failed to find a " + ClassUtil.getClassSimpleName(type) + " indexed " + index + " by its type in the " + packetClass.getName() + " class!");
+    }
+}

src/main/java/io/github/retrooper/packetevents/handler/NettyPacketHandler.java

@@ -1,86 +0,0 @@
-package io.github.retrooper.packetevents.handler;
-
-import io.github.retrooper.packetevents.PacketEvents;
-import io.github.retrooper.packetevents.event.impl.PacketReceiveEvent;
-import io.github.retrooper.packetevents.event.impl.PacketSendEvent;
-import io.github.retrooper.packetevents.event.impl.PlayerInjectEvent;
-import io.github.retrooper.packetevents.event.impl.PlayerUninjectEvent;
-import org.bukkit.entity.Player;
-
-import java.util.concurrent.Future;
-
-public class NettyPacketHandler {
-    private static boolean v1_7_nettyMode = false;
-
-    static {
-        try {
-            Class.forName("io.netty.channel.Channel");
-        } catch (ClassNotFoundException e) {
-            v1_7_nettyMode = true;
-        }
-    }
-
-    public static void injectPlayer(final Player player) {
-        final PlayerInjectEvent injectEvent = new PlayerInjectEvent(player);
-        PacketEvents.getAPI().getEventManager().callEvent(injectEvent);
-        if (!injectEvent.isCancelled()) {
-            if (v1_7_nettyMode) {
-                NettyPacketHandler_7.injectPlayer(player);
-            } else {
-                NettyPacketHandler_8.injectPlayer(player);
-            }
-        }
-    }
-
-    public static Future<?> uninjectPlayer(final Player player) {
-        try {
-            final PlayerUninjectEvent uninjectEvent = new PlayerUninjectEvent(player);
-            PacketEvents.getAPI().getEventManager().callEvent(uninjectEvent);
-            if (!uninjectEvent.isCancelled()) {
-                if (v1_7_nettyMode) {
-                    return NettyPacketHandler_7.uninjectPlayer(player);
-                } else {
-                    return NettyPacketHandler_8.uninjectPlayer(player);
-                }
-            }
-        } catch (Exception ignored) {
-
-        }
-        return null;
-    }
-
-    public static void uninjectPlayerNow(final Player player) {
-        try {
-            final PlayerUninjectEvent uninjectEvent = new PlayerUninjectEvent(player);
-            PacketEvents.getAPI().getEventManager().callEvent(uninjectEvent);
-            if (!uninjectEvent.isCancelled()) {
-                if (v1_7_nettyMode) {
-                    NettyPacketHandler_7.uninjectPlayerNow(player);
-                } else {
-                    NettyPacketHandler_8.uninjectPlayerNow(player);
-                }
-            }
-        } catch (Exception ignored) {
-        }
-    }
-
-    public static Object write(final Player sender, final Object packet) {
-        final PacketSendEvent packetSendEvent = new PacketSendEvent(sender, packet);
-        PacketEvents.getAPI().getEventManager().callEvent(packetSendEvent);
-        if (!packetSendEvent.isCancelled()) {
-            return packet;
-        }
-        return null;
-    }
-
-    public static Object read(final Player receiver, final Object packet) {
-        final PacketReceiveEvent packetReceiveEvent = new PacketReceiveEvent(receiver, packet);
-        PacketEvents.getAPI().getEventManager().callEvent(packetReceiveEvent);
-        if (!packetReceiveEvent.isCancelled()) {
-            return packet;
-        }
-        return null;
-    }
-
-
-}

src/main/java/io/github/retrooper/packetevents/handler/NettyPacketHandler_7.java

@@ -1,47 +0,0 @@
-package io.github.retrooper.packetevents.handler;
-
-import io.github.retrooper.packetevents.PacketEvents;
-import io.github.retrooper.packetevents.utils.NMSUtils;
-import net.minecraft.util.io.netty.channel.*;
-import org.bukkit.entity.Player;
-
-import java.util.concurrent.Future;
-
-final class NettyPacketHandler_7 {
-
-    public static void injectPlayer(final Player player) {
-        final ChannelDuplexHandler channelDuplexHandler = new ChannelDuplexHandler() {
-            @Override
-            public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
-                Object packet = NettyPacketHandler.read(player, msg);
-                if (packet == null) {
-                    return;
-                }
-                super.channelRead(ctx, msg);
-            }
-
-            @Override
-            public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
-                Object packet = NettyPacketHandler.write(player, msg);
-                if (packet == null) {
-                    return;
-                }
-                super.write(ctx, msg, promise);
-            }
-        };
-        final ChannelPipeline pipeline = ((Channel) NMSUtils.getChannel(player)).pipeline();
-        pipeline.addBefore("packet_handler", PacketEvents.getHandlerName(player.getName()), channelDuplexHandler);
-    }
-
-    public static Future<?> uninjectPlayer(final Player player) {
-        final Channel channel = (Channel) NMSUtils.getChannel(player);
-        return channel.eventLoop().submit(() -> {
-            channel.pipeline().remove(PacketEvents.getHandlerName(player.getName()));
-        });
-    }
-
-    public static void uninjectPlayerNow(final Player player) {
-        final Channel channel = (Channel) NMSUtils.getChannel(player);
-        channel.pipeline().remove(PacketEvents.getHandlerName(player.getName()));
-    }
-}

src/main/java/io/github/retrooper/packetevents/handler/NettyPacketHandler_8.java

@@ -1,47 +0,0 @@
-package io.github.retrooper.packetevents.handler;
-
-import io.github.retrooper.packetevents.PacketEvents;
-import io.github.retrooper.packetevents.utils.NMSUtils;
-import io.netty.channel.*;
-import org.bukkit.entity.Player;
-
-import java.util.concurrent.Future;
-
-final class NettyPacketHandler_8 {
-
-    public static void injectPlayer(final Player player) {
-        final ChannelDuplexHandler channelDuplexHandler = new ChannelDuplexHandler() {
-            @Override
-            public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
-                Object packet = NettyPacketHandler.read(player, msg);
-                if (packet == null) {
-                    return;
-                }
-                super.channelRead(ctx, msg);
-            }
-
-            @Override
-            public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
-                Object packet = NettyPacketHandler.write(player, msg);
-                if (packet == null) {
-                    return;
-                }
-                super.write(ctx, msg, promise);
-            }
-        };
-        final ChannelPipeline pipeline = ((Channel) NMSUtils.getChannel(player)).pipeline();
-        pipeline.addBefore("packet_handler", PacketEvents.getHandlerName(player.getName()), channelDuplexHandler);
-    }
-
-    public static Future<?> uninjectPlayer(final Player player) {
-        final Channel channel = (Channel) NMSUtils.getChannel(player);
-        return channel.eventLoop().submit(() -> {
-            channel.pipeline().remove(PacketEvents.getHandlerName(player.getName()));
-        });
-    }
-
-    public static void uninjectPlayerNow(final Player player) {
-        final Channel channel = (Channel) NMSUtils.getChannel(player);
-        channel.pipeline().remove(PacketEvents.getHandlerName(player.getName()));
-    }
-}

src/main/java/io/github/retrooper/packetevents/packetmanager/PacketManager.java

@@ -0,0 +1,266 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetmanager;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.event.impl.*;
+import io.github.retrooper.packetevents.packetmanager.netty.NettyPacketManager;
+import io.github.retrooper.packetevents.packetmanager.tinyprotocol.TinyProtocol;
+import io.github.retrooper.packetevents.packettype.PacketType;
+import io.github.retrooper.packetevents.packetwrappers.login.in.WrappedPacketLoginHandshake;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.github.retrooper.packetevents.utils.player.ClientVersion;
+import io.github.retrooper.packetevents.utils.reflection.ClassUtil;
+import io.github.retrooper.packetevents.utils.versionlookup.VersionLookupUtils;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.Plugin;
+
+import java.util.HashMap;
+import java.util.UUID;
+
+public class PacketManager {
+    private final Plugin plugin;
+    private final boolean tinyProtocolMode;
+    public final TinyProtocol tinyProtocol;
+    public final NettyPacketManager nettyProtocol;
+    private final HashMap<UUID, Long> keepAliveMap = new HashMap<>();
+
+    public PacketManager(Plugin plugin, boolean tinyProtocolMode) {
+        this.plugin = plugin;
+        this.tinyProtocolMode = tinyProtocolMode;
+        if (tinyProtocolMode) {
+            tinyProtocol = new TinyProtocol(plugin);
+            nettyProtocol = null;
+        } else {
+            tinyProtocol = null;
+            nettyProtocol = new NettyPacketManager(plugin);
+        }
+    }
+
+    public void injectPlayer(Player player) {
+        if (PacketEvents.getSettings().shouldInjectAsync()) {
+            injectPlayerAsync(player);
+        } else {
+            injectPlayerSync(player);
+        }
+    }
+
+    public void ejectPlayer(Player player) {
+        if (PacketEvents.getSettings().shouldEjectAsync()) {
+            ejectPlayerAsync(player);
+        } else {
+            ejectPlayerSync(player);
+        }
+    }
+
+    public void injectPlayerSync(Player player) {
+        PlayerInjectEvent injectEvent = new PlayerInjectEvent(player, false);
+        PacketEvents.getAPI().getEventManager().callEvent(injectEvent);
+        if (!injectEvent.isCancelled()) {
+            if (tinyProtocolMode) {
+                tinyProtocol.injectPlayer(player);
+            } else {
+                nettyProtocol.injectPlayer(player);
+            }
+        }
+    }
+
+    public void injectPlayerAsync(Player player) {
+        PlayerInjectEvent injectEvent = new PlayerInjectEvent(player, true);
+        PacketEvents.getAPI().getEventManager().callEvent(injectEvent);
+        if (!injectEvent.isCancelled()) {
+            if (tinyProtocolMode) {
+                tinyProtocol.injectPlayerAsync(player);
+            } else {
+                nettyProtocol.injectPlayerAsync(player);
+            }
+        }
+    }
+
+    public void ejectPlayerSync(Player player) {
+        PlayerEjectEvent ejectEvent = new PlayerEjectEvent(player, false);
+        PacketEvents.getAPI().getEventManager().callEvent(ejectEvent);
+        if (!ejectEvent.isCancelled()) {
+            keepAliveMap.remove(player.getUniqueId());
+            NMSUtils.channelCache.remove(player.getUniqueId());
+            if (tinyProtocolMode) {
+                tinyProtocol.ejectPlayer(player);
+            } else {
+                nettyProtocol.ejectPlayer(player);
+            }
+        }
+    }
+
+    public void ejectPlayerAsync(Player player) {
+        PlayerEjectEvent ejectEvent = new PlayerEjectEvent(player, true);
+        PacketEvents.getAPI().getEventManager().callEvent(ejectEvent);
+        if (!ejectEvent.isCancelled()) {
+            keepAliveMap.remove(player.getUniqueId());
+            NMSUtils.channelCache.remove(player.getUniqueId());
+            if (tinyProtocolMode) {
+                tinyProtocol.ejectPlayerAsync(player);
+            } else {
+                nettyProtocol.ejectPlayerAsync(player);
+            }
+        }
+    }
+
+    public void sendPacket(Object channel, Object packet) {
+        if (tinyProtocolMode) {
+            tinyProtocol.sendPacket(channel, packet);
+        } else {
+            nettyProtocol.sendPacket(channel, packet);
+        }
+    }
+
+    public Object read(Player player, Object channel, Object packet) {
+        switch (ClassUtil.getClassSimpleName(packet.getClass())) {
+            case "PacketHandshakingInSetProtocol":
+            case "PacketLoginInCustomPayload":
+            case "PacketLoginInStart":
+            case "PacketLoginInEncryptionBegin":
+                final PacketLoginEvent packetLoginEvent = new PacketLoginEvent(channel, packet);
+                PacketEvents.getAPI().getEventManager().callEvent(packetLoginEvent);
+                interceptLogin(packetLoginEvent);
+                if (packetLoginEvent.isCancelled()) {
+                    packet = null;
+                }
+                break;
+            case "PacketStatusInPing":
+                final PacketStatusEvent packetStatusEvent = new PacketStatusEvent(channel, packet);
+                PacketEvents.getAPI().getEventManager().callEvent(packetStatusEvent);
+                interceptStatus(packetStatusEvent);
+                if (packetStatusEvent.isCancelled()) {
+                    packet = null;
+                }
+                break;
+            default:
+                final PacketReceiveEvent packetReceiveEvent = new PacketReceiveEvent(player, packet);
+                PacketEvents.getAPI().getEventManager().callEvent(packetReceiveEvent);
+                interceptRead(packetReceiveEvent);
+                if (packetReceiveEvent.isCancelled()) {
+                    packet = null;
+                }
+                break;
+        }
+        return packet;
+    }
+
+    public Object write(Player player, Object channel, Object packet) {
+        switch (ClassUtil.getClassSimpleName(packet.getClass())) {
+            case "PacketLoginOutDisconnect":
+            case "PacketLoginOutEncryptionBegin":
+            case "PacketLoginOutSetCompression":
+            case "PacketLoginOutSuccess":
+                final PacketLoginEvent packetLoginEvent = new PacketLoginEvent(channel, packet);
+                PacketEvents.getAPI().getEventManager().callEvent(packetLoginEvent);
+                interceptLogin(packetLoginEvent);
+                if (packetLoginEvent.isCancelled()) {
+                    packet = null;
+                }
+                break;
+            case "PacketStatusOutPong":
+                final PacketStatusEvent packetStatusEvent = new PacketStatusEvent(channel, packet);
+                PacketEvents.getAPI().getEventManager().callEvent(packetStatusEvent);
+                interceptStatus(packetStatusEvent);
+                if (packetStatusEvent.isCancelled()) {
+                    packet = null;
+                }
+                break;
+            default:
+                final PacketSendEvent packetSendEvent = new PacketSendEvent(player, packet);
+                PacketEvents.getAPI().getEventManager().callEvent(packetSendEvent);
+                interceptWrite(packetSendEvent);
+                if (packetSendEvent.isCancelled()) {
+                    packet = null;
+                }
+                break;
+        }
+
+        return packet;
+    }
+
+    public void postRead(Player player, Object packet) {
+        switch (ClassUtil.getClassSimpleName(packet.getClass())) {
+            case "PacketHandshakingInSetProtocol":
+            case "PacketLoginInCustomPayload":
+            case "PacketLoginInStart":
+            case "PacketLoginInEncryptionBegin":
+            case "PacketStatusInPing":
+                break;
+            default:
+                PacketEvents.getAPI().getEventManager().callEvent(new PostPacketReceiveEvent(player, packet));
+                break;
+        }
+    }
+
+    public void postWrite(Player player, Object packet) {
+        switch (ClassUtil.getClassSimpleName(packet.getClass())) {
+            case "PacketLoginOutDisconnect":
+            case "PacketLoginOutEncryptionBegin":
+            case "PacketLoginOutSetCompression":
+            case "PacketLoginOutSuccess":
+            case "PacketStatusOutPong":
+                break;
+            default:
+                PacketEvents.getAPI().getEventManager().callEvent(new PostPacketSendEvent(player, packet));
+                break;
+        }
+    }
+
+
+    private void interceptRead(PacketReceiveEvent event) {
+        if (event.getPacketId() == PacketType.Client.KEEP_ALIVE) {
+            UUID uuid = event.getPlayer().getUniqueId();
+            long timestamp = keepAliveMap.getOrDefault(uuid, event.getTimestamp());
+            long currentTime = event.getTimestamp();
+            long ping = currentTime - timestamp;
+            long smoothedPing = ((PacketEvents.getAPI().getPlayerUtils().getSmoothedPing(event.getPlayer()) * 3) + ping) / 4;
+            PacketEvents.getAPI().getPlayerUtils().playerPingMap.put(uuid, (short) ping);
+            PacketEvents.getAPI().getPlayerUtils().playerSmoothedPingMap.put(uuid, (short) smoothedPing);
+        }
+    }
+
+    private void interceptWrite(PacketSendEvent event) {
+        if (event.getPacketId() == PacketType.Server.KEEP_ALIVE) {
+            keepAliveMap.put(event.getPlayer().getUniqueId(), event.getTimestamp());
+        }
+    }
+
+    private void interceptLogin(PacketLoginEvent event) {
+        if (event.getPacketId() == PacketType.Login.HANDSHAKE) {
+            if (!VersionLookupUtils.isDependencyAvailable()) {
+                WrappedPacketLoginHandshake handshake = new WrappedPacketLoginHandshake(event.getNMSPacket());
+                int protocolVersion = handshake.getProtocolVersion();
+                ClientVersion version = ClientVersion.getClientVersion(protocolVersion);
+                PacketEvents.getAPI().getPlayerUtils().clientVersionsMap.put(event.getChannel(), version);
+            }
+        }
+    }
+
+    private void interceptStatus(PacketStatusEvent event) {
+
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetmanager/netty/NettyPacketManager.java

@@ -0,0 +1,136 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetmanager.netty;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.Plugin;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+public class NettyPacketManager {
+    public static boolean v1_7_nettyMode = false;
+    public static final ExecutorService
+            executorService =
+            Executors.newFixedThreadPool(Math.max(Runtime.getRuntime().availableProcessors(), 64));
+
+    static {
+        try {
+            Class.forName("io.netty.channel.Channel");
+        } catch (ClassNotFoundException e) {
+            v1_7_nettyMode = true;
+        }
+    }
+
+    private Plugin plugin;
+    private Object npm;
+
+    public NettyPacketManager(Plugin plugin) {
+        this.plugin = plugin;
+        if (v1_7_nettyMode) {
+            npm = new NettyPacketManager_7();
+        } else {
+            npm = new NettyPacketManager_8();
+        }
+    }
+
+    /**
+     * Synchronously inject a player
+     *
+     * @param player Target player to inject
+     */
+    public void injectPlayer(final Player player) {
+        if (v1_7_nettyMode) {
+            NettyPacketManager_7 npm_7 = (NettyPacketManager_7)npm;
+            npm_7.injectPlayer(player);
+        } else {
+            NettyPacketManager_8 npm_8 = (NettyPacketManager_8)npm;
+            npm_8.injectPlayer(player);
+        }
+    }
+
+    /**
+     * Asynchronously inject a player
+     *
+     * @param player
+     */
+    public void injectPlayerAsync(final Player player) {
+        //Redundant channel variable created just so we can cache it synchronously.
+        Object channel = NMSUtils.getChannel(player);
+        executorService.execute(() -> {
+            if (v1_7_nettyMode) {
+                NettyPacketManager_7 npm_7 = (NettyPacketManager_7)npm;
+                npm_7.injectPlayer(player);
+            } else {
+                NettyPacketManager_8 npm_8 = (NettyPacketManager_8)npm;
+                npm_8.injectPlayer(player);
+            }
+        });
+    }
+
+    /**
+     * Synchronously eject a player.
+     *
+     * @param player
+     */
+    public void ejectPlayer(final Player player) {
+        if (v1_7_nettyMode) {
+            NettyPacketManager_7 npm_7 = (NettyPacketManager_7)npm;
+            npm_7.ejectPlayer(player);
+        } else {
+            NettyPacketManager_8 npm_8 = (NettyPacketManager_8)npm;
+            npm_8.ejectPlayer(player);
+        }
+    }
+
+    /**
+     * Asynchronously eject a player
+     *
+     * @param player
+     */
+    public void ejectPlayerAsync(final Player player) {
+        executorService.execute(() -> {
+            if (v1_7_nettyMode) {
+                NettyPacketManager_7 npm_7 = (NettyPacketManager_7)npm;
+                npm_7.ejectPlayer(player);
+            } else {
+                NettyPacketManager_8 npm_8 = (NettyPacketManager_8)npm;
+                npm_8.ejectPlayer(player);
+            }
+        });
+    }
+
+    public void sendPacket(Object channel, Object packet) {
+        if (v1_7_nettyMode) {
+            NettyPacketManager_7 npm_7 = (NettyPacketManager_7)npm;
+            npm_7.sendPacket(channel, packet);
+        } else {
+            NettyPacketManager_8 npm_8 = (NettyPacketManager_8)npm;
+            npm_8.sendPacket(channel, packet);
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetmanager/netty/NettyPacketManager_7.java

@@ -0,0 +1,84 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetmanager.netty;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import net.minecraft.util.io.netty.channel.Channel;
+import net.minecraft.util.io.netty.channel.ChannelDuplexHandler;
+import net.minecraft.util.io.netty.channel.ChannelHandlerContext;
+import net.minecraft.util.io.netty.channel.ChannelPipeline;
+import net.minecraft.util.io.netty.channel.ChannelPromise;
+import org.bukkit.entity.Player;
+
+final class NettyPacketManager_7 {
+    NettyPacketManager_7() {
+
+    }
+    /**
+     * Inject a player using 1.7.10's netty import location
+     * @param player
+     */
+    public void injectPlayer(final Player player) {
+        final ChannelDuplexHandler channelDuplexHandler = new ChannelDuplexHandler() {
+            @Override
+            public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+                Object packet = PacketEvents.getAPI().packetManager.read(player, ctx.channel(), msg);
+                if (packet == null) {
+                    return;
+                }
+                super.channelRead(ctx, msg);
+                PacketEvents.getAPI().packetManager.postRead(player, packet);
+            }
+
+            @Override
+            public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
+                Object packet = PacketEvents.getAPI().packetManager.write(player, ctx.channel(),msg);
+                if (packet == null) {
+                    return;
+                }
+                super.write(ctx, msg, promise);
+                PacketEvents.getAPI().packetManager.postWrite(player, packet);
+            }
+        };
+        final ChannelPipeline pipeline = ((Channel) NMSUtils.getChannel(player)).pipeline();
+        pipeline.addBefore("packet_handler", PacketEvents.getHandlerName(player.getName()), channelDuplexHandler);
+    }
+
+    /**
+     * Eject a player using 1.7.10 netty import location.
+     * @param player Target Player
+     */
+    public void ejectPlayer(final Player player) {
+         Channel channel = (Channel) NMSUtils.getChannelNoCache(player);
+        assert channel != null;
+        channel.pipeline().remove(PacketEvents.getHandlerName(player.getName()));
+    }
+
+    public void sendPacket(Object rawChannel, Object packet) {
+        Channel channel = (Channel)rawChannel;
+        channel.pipeline().writeAndFlush(packet);
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetmanager/netty/NettyPacketManager_8.java

@@ -0,0 +1,84 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetmanager.netty;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelDuplexHandler;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelPipeline;
+import io.netty.channel.ChannelPromise;
+import org.bukkit.entity.Player;
+
+final class NettyPacketManager_8 {
+    NettyPacketManager_8() {
+
+    }
+    /**
+     * Inject a player with 1.8+ netty import location.
+     * @param player
+     */
+    public void injectPlayer(final Player player) {
+        final ChannelDuplexHandler channelDuplexHandler = new ChannelDuplexHandler() {
+            @Override
+            public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+                Object packet = PacketEvents.getAPI().packetManager.read(player, ctx.channel(),msg);
+                if (packet == null) {
+                    return;
+                }
+                super.channelRead(ctx, msg);
+                PacketEvents.getAPI().packetManager.postRead(player, packet);
+            }
+
+            @Override
+            public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
+                Object packet = PacketEvents.getAPI().packetManager.write(player, ctx.channel(),msg);
+                if (packet == null) {
+                    return;
+                }
+                super.write(ctx, msg, promise);
+                PacketEvents.getAPI().packetManager.postWrite(player, packet);
+            }
+        };
+        final ChannelPipeline pipeline = ((Channel) NMSUtils.getChannel(player)).pipeline();
+        pipeline.addBefore("packet_handler", PacketEvents.getHandlerName(player.getName()), channelDuplexHandler);
+    }
+
+    /**
+     * Eject a player with 1.8+ netty import location.
+     * @param player
+     */
+    public void ejectPlayer(final Player player) {
+        final Channel channel = (Channel) NMSUtils.getChannelNoCache(player);
+        assert channel != null;
+        channel.pipeline().remove(PacketEvents.getHandlerName(player.getName()));
+    }
+
+    public void sendPacket(Object rawChannel, Object packet) {
+        Channel channel = (Channel)rawChannel;
+        channel.pipeline().writeAndFlush(packet);
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetmanager/tinyprotocol/Reflection.java

@@ -0,0 +1,376 @@
+package io.github.retrooper.packetevents.packetmanager.tinyprotocol;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.util.Arrays;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.bukkit.Bukkit;
+
+/**
+ * An utility class that simplifies reflection in Bukkit plugins.
+ *
+ * @author Kristian
+ */
+public final class Reflection {
+    /**
+     * An interface for invoking a specific constructor.
+     */
+    public interface ConstructorInvoker {
+        /**
+         * Invoke a constructor for a specific class.
+         *
+         * @param arguments - the arguments to pass to the constructor.
+         * @return The constructed object.
+         */
+        Object invoke(Object... arguments);
+    }
+
+    /**
+     * An interface for invoking a specific method.
+     */
+    public interface MethodInvoker {
+        /**
+         * Invoke a method on a specific target object.
+         *
+         * @param target - the target object, or NULL for a static method.
+         * @param arguments - the arguments to pass to the method.
+         * @return The return value, or NULL if is void.
+         */
+        Object invoke(Object target, Object... arguments);
+    }
+
+    /**
+     * An interface for retrieving the field content.
+     *
+     * @param <T> - field type.
+     */
+    public interface FieldAccessor<T> {
+        /**
+         * Retrieve the content of a field.
+         *
+         * @param target - the target object, or NULL for a static field.
+         * @return The value of the field.
+         */
+        T get(Object target);
+
+        /**
+         * Set the content of a field.
+         *
+         * @param target - the target object, or NULL for a static field.
+         * @param value - the new value of the field.
+         */
+        void set(Object target, Object value);
+
+        /**
+         * Determine if the given object has this field.
+         *
+         * @param target - the object to test.
+         * @return TRUE if it does, FALSE otherwise.
+         */
+        boolean hasField(Object target);
+    }
+
+    // Deduce the net.minecraft.server.v* package
+    private static String OBC_PREFIX = Bukkit.getServer().getClass().getPackage().getName();
+    private static String NMS_PREFIX = OBC_PREFIX.replace("org.bukkit.craftbukkit", "net.minecraft.server");
+    private static String VERSION = OBC_PREFIX.replace("org.bukkit.craftbukkit", "").replace(".", "");
+
+    // Variable replacement
+    private static Pattern MATCH_VARIABLE = Pattern.compile("\\{([^\\}]+)\\}");
+
+    private Reflection() {
+        // Seal class
+    }
+
+    /**
+     * Retrieve a field accessor for a specific field type and name.
+     *
+     * @param target - the target type.
+     * @param name - the name of the field, or NULL to ignore.
+     * @param fieldType - a compatible field type.
+     * @return The field accessor.
+     */
+    public static <T> FieldAccessor<T> getField(Class<?> target, String name, Class<T> fieldType) {
+        return getField(target, name, fieldType, 0);
+    }
+
+    /**
+     * Retrieve a field accessor for a specific field type and name.
+     *
+     * @param className - lookup name of the class, see {@link #getClass(String)}.
+     * @param name - the name of the field, or NULL to ignore.
+     * @param fieldType - a compatible field type.
+     * @return The field accessor.
+     */
+    public static <T> FieldAccessor<T> getField(String className, String name, Class<T> fieldType) {
+        return getField(getClass(className), name, fieldType, 0);
+    }
+
+    /**
+     * Retrieve a field accessor for a specific field type and name.
+     *
+     * @param target - the target type.
+     * @param fieldType - a compatible field type.
+     * @param index - the number of compatible fields to skip.
+     * @return The field accessor.
+     */
+    public static <T> FieldAccessor<T> getField(Class<?> target, Class<T> fieldType, int index) {
+        return getField(target, null, fieldType, index);
+    }
+
+    /**
+     * Retrieve a field accessor for a specific field type and name.
+     *
+     * @param className - lookup name of the class, see {@link #getClass(String)}.
+     * @param fieldType - a compatible field type.
+     * @param index - the number of compatible fields to skip.
+     * @return The field accessor.
+     */
+    public static <T> FieldAccessor<T> getField(String className, Class<T> fieldType, int index) {
+        return getField(getClass(className), fieldType, index);
+    }
+
+    // Common method
+    private static <T> FieldAccessor<T> getField(Class<?> target, String name, Class<T> fieldType, int index) {
+        for (final Field field : target.getDeclaredFields()) {
+            if ((name == null || field.getName().equals(name)) && fieldType.isAssignableFrom(field.getType()) && index-- <= 0) {
+                field.setAccessible(true);
+
+                // A function for retrieving a specific field value
+                return new FieldAccessor<T>() {
+
+                    @Override
+                    @SuppressWarnings("unchecked")
+                    public T get(Object target) {
+                        try {
+                            return (T) field.get(target);
+                        } catch (IllegalAccessException e) {
+                            throw new RuntimeException("Cannot access reflection.", e);
+                        }
+                    }
+
+                    @Override
+                    public void set(Object target, Object value) {
+                        try {
+                            field.set(target, value);
+                        } catch (IllegalAccessException e) {
+                            throw new RuntimeException("Cannot access reflection.", e);
+                        }
+                    }
+
+                    @Override
+                    public boolean hasField(Object target) {
+                        // target instanceof DeclaringClass
+                        return field.getDeclaringClass().isAssignableFrom(target.getClass());
+                    }
+                };
+            }
+        }
+
+        // Search in parent classes
+        if (target.getSuperclass() != null)
+            return getField(target.getSuperclass(), name, fieldType, index);
+
+        throw new IllegalArgumentException("Cannot find field with type " + fieldType);
+    }
+
+    /**
+     * Search for the first publicly and privately defined method of the given name and parameter count.
+     *
+     * @param className - lookup name of the class, see {@link #getClass(String)}.
+     * @param methodName - the method name, or NULL to skip.
+     * @param params - the expected parameters.
+     * @return An object that invokes this specific method.
+     * @throws IllegalStateException If we cannot find this method.
+     */
+    public static MethodInvoker getMethod(String className, String methodName, Class<?>... params) {
+        return getTypedMethod(getClass(className), methodName, null, params);
+    }
+
+    /**
+     * Search for the first publicly and privately defined method of the given name and parameter count.
+     *
+     * @param clazz - a class to start with.
+     * @param methodName - the method name, or NULL to skip.
+     * @param params - the expected parameters.
+     * @return An object that invokes this specific method.
+     * @throws IllegalStateException If we cannot find this method.
+     */
+    public static MethodInvoker getMethod(Class<?> clazz, String methodName, Class<?>... params) {
+        return getTypedMethod(clazz, methodName, null, params);
+    }
+
+    /**
+     * Search for the first publicly and privately defined method of the given name and parameter count.
+     *
+     * @param clazz - a class to start with.
+     * @param methodName - the method name, or NULL to skip.
+     * @param returnType - the expected return type, or NULL to ignore.
+     * @param params - the expected parameters.
+     * @return An object that invokes this specific method.
+     * @throws IllegalStateException If we cannot find this method.
+     */
+    public static MethodInvoker getTypedMethod(Class<?> clazz, String methodName, Class<?> returnType, Class<?>... params) {
+        for (final Method method : clazz.getDeclaredMethods()) {
+            if ((methodName == null || method.getName().equals(methodName))
+                    && (returnType == null || method.getReturnType().equals(returnType))
+                    && Arrays.equals(method.getParameterTypes(), params)) {
+                method.setAccessible(true);
+
+                return new MethodInvoker() {
+
+                    @Override
+                    public Object invoke(Object target, Object... arguments) {
+                        try {
+                            return method.invoke(target, arguments);
+                        } catch (Exception e) {
+                            throw new RuntimeException("Cannot invoke method " + method, e);
+                        }
+                    }
+
+                };
+            }
+        }
+
+        // Search in every superclass
+        if (clazz.getSuperclass() != null)
+            return getMethod(clazz.getSuperclass(), methodName, params);
+
+        throw new IllegalStateException(String.format("Unable to find method %s (%s).", methodName, Arrays.asList(params)));
+    }
+
+    /**
+     * Search for the first publically and privately defined constructor of the given name and parameter count.
+     *
+     * @param className - lookup name of the class, see {@link #getClass(String)}.
+     * @param params - the expected parameters.
+     * @return An object that invokes this constructor.
+     * @throws IllegalStateException If we cannot find this method.
+     */
+    public static ConstructorInvoker getConstructor(String className, Class<?>... params) {
+        return getConstructor(getClass(className), params);
+    }
+
+    /**
+     * Search for the first publically and privately defined constructor of the given name and parameter count.
+     *
+     * @param clazz - a class to start with.
+     * @param params - the expected parameters.
+     * @return An object that invokes this constructor.
+     * @throws IllegalStateException If we cannot find this method.
+     */
+    public static ConstructorInvoker getConstructor(Class<?> clazz, Class<?>... params) {
+        for (final Constructor<?> constructor : clazz.getDeclaredConstructors()) {
+            if (Arrays.equals(constructor.getParameterTypes(), params)) {
+                constructor.setAccessible(true);
+
+                return new ConstructorInvoker() {
+
+                    @Override
+                    public Object invoke(Object... arguments) {
+                        try {
+                            return constructor.newInstance(arguments);
+                        } catch (Exception e) {
+                            throw new RuntimeException("Cannot invoke constructor " + constructor, e);
+                        }
+                    }
+
+                };
+            }
+        }
+
+        throw new IllegalStateException(String.format("Unable to find constructor for %s (%s).", clazz, Arrays.asList(params)));
+    }
+
+    /**
+     * Retrieve a class from its full name, without knowing its type on compile time.
+     * <p>
+     * This is useful when looking up fields by a NMS or OBC type.
+     * <p>
+     *
+     * See {@link #getClass()} for more information.
+     * @param lookupName - the class name with variables.
+     * @return The class.
+     */
+    public static Class<Object> getUntypedClass(String lookupName) {
+        @SuppressWarnings({ "rawtypes", "unchecked" })
+        Class<Object> clazz = (Class) getClass(lookupName);
+        return clazz;
+    }
+
+
+    public static Class<?> getClass(String lookupName) {
+        return getCanonicalClass(expandVariables(lookupName));
+    }
+
+    /**
+     * Retrieve a class in the net.minecraft.server.VERSION.* package.
+     *
+     * @param name - the name of the class, excluding the package.
+     * @throws IllegalArgumentException If the class doesn't exist.
+     */
+    public static Class<?> getMinecraftClass(String name) {
+        return getCanonicalClass(NMS_PREFIX + "." + name);
+    }
+
+    /**
+     * Retrieve a class in the org.bukkit.craftbukkit.VERSION.* package.
+     *
+     * @param name - the name of the class, excluding the package.
+     * @throws IllegalArgumentException If the class doesn't exist.
+     */
+    public static Class<?> getCraftBukkitClass(String name) {
+        return getCanonicalClass(OBC_PREFIX + "." + name);
+    }
+
+    /**
+     * Retrieve a class by its canonical name.
+     *
+     * @param canonicalName - the canonical name.
+     * @return The class.
+     */
+    private static Class<?> getCanonicalClass(String canonicalName) {
+        try {
+            return Class.forName(canonicalName);
+        } catch (ClassNotFoundException e) {
+            throw new IllegalArgumentException("Cannot find " + canonicalName, e);
+        }
+    }
+
+    /**
+     * Expand variables such as "{nms}" and "{obc}" to their corresponding packages.
+     *
+     * @param name - the full name of the class.
+     * @return The expanded string.
+     */
+    private static String expandVariables(String name) {
+        StringBuffer output = new StringBuffer();
+        Matcher matcher = MATCH_VARIABLE.matcher(name);
+
+        while (matcher.find()) {
+            String variable = matcher.group(1);
+            String replacement = "";
+
+            // Expand all detected variables
+            if ("nms".equalsIgnoreCase(variable))
+                replacement = NMS_PREFIX;
+            else if ("obc".equalsIgnoreCase(variable))
+                replacement = OBC_PREFIX;
+            else if ("version".equalsIgnoreCase(variable))
+                replacement = VERSION;
+            else
+                throw new IllegalArgumentException("Unknown variable: " + variable);
+
+            // Assume the expanded variables are all packages, and append a dot
+            if (replacement.length() > 0 && matcher.end() < name.length() && name.charAt(matcher.end()) != '.')
+                replacement += ".";
+            matcher.appendReplacement(output, Matcher.quoteReplacement(replacement));
+        }
+
+        matcher.appendTail(output);
+        return output.toString();
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetmanager/tinyprotocol/TinyProtocol.java

@@ -0,0 +1,120 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetmanager.tinyprotocol;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.packetmanager.netty.NettyPacketManager;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.Plugin;
+
+public class TinyProtocol {
+    private final Object tinyProt;
+
+    public TinyProtocol(Plugin plugin) {
+        if (NettyPacketManager.v1_7_nettyMode) {
+            tinyProt = new TinyProtocol7(plugin);
+        } else {
+            tinyProt = new TinyProtocol8(plugin);
+        }
+    }
+
+    public void injectPlayer(Player player) {
+        if (!NettyPacketManager.v1_7_nettyMode) {
+            TinyProtocol8 tp8 = (TinyProtocol8) tinyProt;
+            tp8.injectPlayer(player);
+        } else {
+            TinyProtocol7 tp7 = (TinyProtocol7) tinyProt;
+            tp7.injectPlayer(player);
+        }
+    }
+
+    public void injectPlayerAsync(Player player) {
+        if (!NettyPacketManager.v1_7_nettyMode) {
+            TinyProtocol8 tp8 = (TinyProtocol8) tinyProt;
+            tp8.injectPlayerAsync(player);
+        } else {
+            TinyProtocol7 tp7 = (TinyProtocol7) tinyProt;
+            tp7.injectPlayerAsync(player);
+        }
+    }
+
+    public void ejectPlayer(Player player) {
+        if (!NettyPacketManager.v1_7_nettyMode) {
+            TinyProtocol8 tp8 = (TinyProtocol8) tinyProt;
+            tp8.uninjectPlayer(player);
+        } else {
+            TinyProtocol7 tp7 = (TinyProtocol7) tinyProt;
+            tp7.uninjectPlayer(player);
+        }
+    }
+
+    public void ejectPlayerAsync(Player player) {
+        if (!NettyPacketManager.v1_7_nettyMode) {
+            TinyProtocol8 tp8 = (TinyProtocol8) tinyProt;
+            tp8.uninjectPlayerAsync(player);
+        } else {
+            TinyProtocol7 tp7 = (TinyProtocol7) tinyProt;
+            tp7.uninjectPlayerAsync(player);
+        }
+    }
+
+    public void sendPacket(Object channel, Object packet) {
+        if (!NettyPacketManager.v1_7_nettyMode) {
+            TinyProtocol8 tp8 = (TinyProtocol8) tinyProt;
+            tp8.sendPacket(channel, packet);
+        } else {
+            TinyProtocol7 tp7 = (TinyProtocol7) tinyProt;
+            tp7.sendPacket(channel, packet);
+        }
+    }
+
+    public Object read(Player player, Object channel, Object packet) {
+        return PacketEvents.getAPI().packetManager.read(player, channel, packet);
+    }
+
+    public Object write(Player player, Object channel, Object packet) {
+        return PacketEvents.getAPI().packetManager.write(player, channel, packet);
+    }
+
+    public Object getChannel(Player player) {
+        if (NettyPacketManager.v1_7_nettyMode) {
+            TinyProtocol7 tp7 = (TinyProtocol7) tinyProt;
+            return tp7.getChannel(player);
+        } else {
+            TinyProtocol8 tp8 = (TinyProtocol8) tinyProt;
+            return tp8.getChannel(player);
+        }
+    }
+
+    public boolean canInject(Player player) {
+        if (NettyPacketManager.v1_7_nettyMode) {
+            TinyProtocol7 tp7 = (TinyProtocol7) tinyProt;
+            return !tp7.uninjectedChannels.contains(getChannel(player));
+        } else {
+            TinyProtocol8 tp8 = (TinyProtocol8) tinyProt;
+            return !tp8.uninjectedChannels.contains(getChannel(player));
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetmanager/tinyprotocol/TinyProtocol7.java

@@ -0,0 +1,551 @@
+/*
+ * This file is part of Hawk Anticheat.
+ * Copyright (C) 2018 Hawk Development Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package io.github.retrooper.packetevents.packetmanager.tinyprotocol;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.packetmanager.netty.NettyPacketManager;
+import io.github.retrooper.packetevents.packetmanager.tinyprotocol.Reflection.FieldAccessor;
+import io.github.retrooper.packetevents.packetmanager.tinyprotocol.Reflection.MethodInvoker;
+import net.minecraft.util.com.google.common.collect.Lists;
+import net.minecraft.util.com.google.common.collect.MapMaker;
+import net.minecraft.util.com.mojang.authlib.GameProfile;
+import net.minecraft.util.io.netty.channel.*;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerLoginEvent;
+import org.bukkit.event.server.PluginDisableEvent;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.scheduler.BukkitRunnable;
+
+import java.util.*;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.logging.Level;
+
+/**
+ * Represents a very tiny alternative to ProtocolLib.
+ * <p>
+ * It now supports intercepting packets during login and status ping (such as OUT_SERVER_PING)!
+ *
+ * @author Kristian
+ */
+
+//BROKEN: NPEs when player joins while server is starting, and using PlayerJoinEvent instead will cause NPE for protocol version lookup.
+//Protocol version number lookup method from DeprecatedLuke's version of TinyProtocol
+public class TinyProtocol7 {
+    private static final AtomicInteger ID = new AtomicInteger();
+
+    // Used in order to lookup a channel
+    private static final MethodInvoker getPlayerHandle = Reflection.getMethod("{obc}.entity.CraftPlayer", "getHandle");
+    private static final FieldAccessor<Object> getConnection = Reflection.getField("{nms}.EntityPlayer", "playerConnection", Object.class);
+    private static final FieldAccessor<Object> getManager = Reflection.getField("{nms}.PlayerConnection", "networkManager", Object.class);
+    private static final FieldAccessor<Channel> getChannel = Reflection.getField("{nms}.NetworkManager", Channel.class, 0);
+
+    // Looking up ServerConnection
+    private static final Class<Object> minecraftServerClass = Reflection.getUntypedClass("{nms}.MinecraftServer");
+    private static final Class<Object> serverConnectionClass = Reflection.getUntypedClass("{nms}.ServerConnection");
+    private static final FieldAccessor<Object> getMinecraftServer = Reflection.getField("{obc}.CraftServer", minecraftServerClass, 0);
+    private static final FieldAccessor<Object> getServerConnection = Reflection.getField(minecraftServerClass, serverConnectionClass, 0);
+    private static final MethodInvoker getNetworkMarkers = Reflection.getTypedMethod(serverConnectionClass, null, List.class, serverConnectionClass);
+
+    // Packets we have to intercept
+    private static final Class<?> PACKET_LOGIN_IN_START = Reflection.getMinecraftClass("PacketLoginInStart");
+    private static final Class<?> PACKET_HANDSHAKING_IN_SET_PROTOCOL = Reflection.getMinecraftClass("PacketHandshakingInSetProtocol");
+    private static final FieldAccessor<GameProfile> getGameProfile = Reflection.getField(PACKET_LOGIN_IN_START, GameProfile.class, 0);
+
+    // Speedup channel/protocol lookup
+    private Map<String, Channel> channelLookup = new MapMaker().weakValues().makeMap();
+    private Listener listener;
+
+    // Channels that have already been removed
+    public Set<Channel> uninjectedChannels = Collections.newSetFromMap(new MapMaker().weakKeys().<Channel, Boolean>makeMap());
+
+    // List of network markers
+    private List<Object> networkManagers;
+
+    // Injected channel handlers
+    private List<Channel> serverChannels = Lists.newArrayList();
+    private ChannelInboundHandlerAdapter serverChannelHandler;
+    private ChannelInitializer<Channel> beginInitProtocol;
+    private ChannelInitializer<Channel> endInitProtocol;
+
+    // Current handler name
+    private String handlerName;
+
+    protected volatile boolean closed;
+    protected Plugin plugin;
+
+    /**
+     * Construct a new instance of TinyProtocol, and start intercepting packets for all connected clients and future clients.
+     * <p>
+     * You can construct multiple instances per plugin.
+     *
+     * @param plugin - the plugin.
+     */
+    public TinyProtocol7(final Plugin plugin) {
+        this.plugin = plugin;
+
+        // Compute handler name
+        this.handlerName = getHandlerName();
+
+        try {
+            registerChannelHandler();
+            registerPlayers(plugin);
+        } catch (IllegalArgumentException ex) {
+            // Damn you, late bind
+            plugin.getLogger().info("Delaying server channel injection due to late bind.");
+
+            new BukkitRunnable() {
+                @Override
+                public void run() {
+                    registerChannelHandler();
+                    registerPlayers(plugin);
+                    plugin.getLogger().info("Late bind injection successful.");
+                }
+            }.runTask(plugin);
+        }
+    }
+
+    private void createServerChannelHandler() {
+        // Handle connected channels
+        endInitProtocol = new ChannelInitializer<Channel>() {
+
+            @Override
+            protected void initChannel(Channel channel) throws Exception {
+                try {
+                    // This can take a while, so we need to stop the main thread from interfering
+                    synchronized (networkManagers) {
+                        // Stop injecting channels
+                        if (!closed) {
+                            channel.eventLoop().submit(() -> injectChannelInternal(channel));
+                        }
+                    }
+                } catch (Exception e) {
+                    plugin.getLogger().log(Level.SEVERE, "Cannot inject incomming channel " + channel, e);
+                }
+            }
+
+        };
+
+        // This is executed before Minecraft's channel handler
+        beginInitProtocol = new ChannelInitializer<Channel>() {
+
+            @Override
+            protected void initChannel(Channel channel) throws Exception {
+                channel.pipeline().addLast(endInitProtocol);
+            }
+
+        };
+
+        serverChannelHandler = new ChannelInboundHandlerAdapter() {
+
+            @Override
+            public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+                Channel channel = (Channel) msg;
+
+                // Prepare to initialize ths channel
+                channel.pipeline().addFirst(beginInitProtocol);
+                ctx.fireChannelRead(msg);
+            }
+
+        };
+    }
+
+
+    @SuppressWarnings("unchecked")
+    private void registerChannelHandler() {
+        Object mcServer = getMinecraftServer.get(Bukkit.getServer());
+        Object serverConnection = getServerConnection.get(mcServer);
+        boolean looking = true;
+
+        // We need to synchronize against this list
+        networkManagers = (List<Object>) getNetworkMarkers.invoke(null, serverConnection);
+        createServerChannelHandler();
+
+        // Find the correct list, or implicitly throw an exception
+        for (int i = 0; looking; i++) {
+            List<Object> list = Reflection.getField(serverConnection.getClass(), List.class, i).get(serverConnection);
+
+            for (Object item : list) {
+                if (!(item instanceof ChannelFuture))
+                    break;
+
+                // Channel future that contains the server connection
+                Channel serverChannel = ((ChannelFuture) item).channel();
+
+                serverChannels.add(serverChannel);
+                serverChannel.pipeline().addFirst(serverChannelHandler);
+                looking = false;
+            }
+        }
+    }
+
+    private void unregisterChannelHandler() {
+        if (serverChannelHandler == null)
+            return;
+
+        for (Channel serverChannel : serverChannels) {
+            final ChannelPipeline pipeline = serverChannel.pipeline();
+
+            // Remove channel handler
+            serverChannel.eventLoop().execute(new Runnable() {
+
+                @Override
+                public void run() {
+                    try {
+                        pipeline.remove(serverChannelHandler);
+                    } catch (NoSuchElementException e) {
+                        // That's fine
+                    }
+                }
+
+            });
+        }
+    }
+
+    private void registerPlayers(Plugin plugin) {
+        for (Player player : plugin.getServer().getOnlinePlayers()) {
+            injectPlayer(player);
+        }
+    }
+
+    /**
+     * Invoked when the server is starting to send a packet to a player.
+     * <p>
+     * Note that this is not executed on the main thread.
+     *
+     * @param receiver - the receiving player, NULL for early login/status packets.
+     * @param channel  - the channel that received the packet. Never NULL.
+     * @param packet   - the packet being sent.
+     * @return The packet to send instead, or NULL to cancel the transmission.
+     */
+    public Object onPacketOutAsync(Player receiver, Channel channel, Object packet) {
+        return PacketEvents.getAPI().packetManager.write(receiver, channel, packet);
+    }
+
+    /**
+     * Invoked when the server has received a packet from a given player.
+     * <p>
+     * Use {@link Channel#remoteAddress()} to get the remote address of the client.
+     *
+     * @param sender  - the player that sent the packet, NULL for early login/status packets.
+     * @param channel - channel that received the packet. Never NULL.
+     * @param packet  - the packet being received.
+     * @return The packet to recieve instead, or NULL to cancel.
+     */
+    public Object onPacketInAsync(Player sender, Channel channel, Object packet) {
+        return PacketEvents.getAPI().packetManager.read(sender, channel,packet);
+    }
+
+    /**
+     * Send a packet to a particular player.
+     * <p>
+     * Note that {@link #onPacketOutAsync(Player, Channel, Object)} will be invoked with this packet.
+     *
+     * @param player - the destination player.
+     * @param packet - the packet to send.
+     */
+    public void sendPacket(Player player, Object packet) {
+        sendPacket(getChannel(player), packet);
+    }
+
+    /**
+     * Send a packet to a particular client.
+     * <p>
+     * Note that {@link #onPacketOutAsync(Player, Channel, Object)} will be invoked with this packet.
+     *
+     * @param channel - client identified by a channel.
+     * @param packet  - the packet to send.
+     */
+    public void sendPacket(Channel channel, Object packet) {
+        channel.pipeline().writeAndFlush(packet);
+    }
+
+    public void sendPacket(Object channel, Object packet) {
+        sendPacket((Channel) channel, packet);
+    }
+
+    /**
+     * Pretend that a given packet has been received from a player.
+     * <p>
+     * Note that {@link #onPacketInAsync(Player, Channel, Object)} will be invoked with this packet.
+     *
+     * @param player - the player that sent the packet.
+     * @param packet - the packet that will be received by the server.
+     */
+    public void receivePacket(Player player, Object packet) {
+        receivePacket(getChannel(player), packet);
+    }
+
+    /**
+     * Pretend that a given packet has been received from a given client.
+     * <p>
+     * Note that {@link #onPacketInAsync(Player, Channel, Object)} will be invoked with this packet.
+     *
+     * @param channel - client identified by a channel.
+     * @param packet  - the packet that will be received by the server.
+     */
+    public void receivePacket(Channel channel, Object packet) {
+        channel.pipeline().context("encoder").fireChannelRead(packet);
+    }
+
+    /**
+     * Retrieve the name of the channel injector, default implementation is "tiny-" + plugin name + "-" + a unique ID.
+     * <p>
+     * Note that this method will only be invoked once. It is no longer necessary to override this to support multiple instances.
+     *
+     * @return A unique channel handler name.
+     */
+    protected String getHandlerName() {
+        return "PacketEvents-" + ID.incrementAndGet();
+    }
+
+    /**
+     * Add a custom channel handler to the given player's channel pipeline, allowing us to intercept sent and received packets.
+     * <p>
+     * This will automatically be called when a player has logged in.
+     *
+     * @param player - the player to inject.
+     */
+    public void injectPlayer(Player player) {
+        injectChannelInternal(getChannel(player)).player = player;
+    }
+
+    public void injectPlayerAsync(Player player) {
+        Channel channel = getChannel(player);
+        injectChannelInternalAsync(channel).player = player;
+    }
+
+    /**
+     * Add a custom channel handler to the given channel.
+     *
+     * @param channel - the channel to inject.
+     */
+    public void injectChannel(Channel channel) {
+        injectChannelInternal(channel);
+    }
+
+    public void injectChannelAsync(Channel channel) {
+        injectChannelInternalAsync(channel);
+    }
+
+    /**
+     * Add a custom channel handler to the given channel.
+     *
+     * @param channel - the channel to inject.
+     * @return The packet interceptor.
+     */
+    private PacketInterceptor injectChannelInternal(Channel channel) {
+        try {
+            PacketInterceptor interceptor = (PacketInterceptor) channel.pipeline().get(handlerName);
+
+            // Inject our packet interceptor
+            if (interceptor == null) {
+                interceptor = new PacketInterceptor();
+                channel.pipeline().addBefore("packet_handler", handlerName, interceptor);
+                uninjectedChannels.remove(channel);
+            }
+
+            return interceptor;
+        } catch (IllegalArgumentException e) {
+            // Try again
+            return (PacketInterceptor) channel.pipeline().get(handlerName);
+        }
+    }
+
+    private PacketInterceptor injectChannelInternalAsync(Channel channel) {
+        try {
+            PacketInterceptor interceptor = (PacketInterceptor) channel.pipeline().get(handlerName);
+
+            // Inject our packet interceptor
+            if (interceptor == null) {
+                interceptor = new PacketInterceptor();
+                final PacketInterceptor pi = interceptor;
+                NettyPacketManager.executorService.execute(new Runnable() {
+                    @Override
+                    public void run() {
+                        channel.pipeline().addBefore("packet_handler", handlerName, pi);
+                    }
+                });
+                uninjectedChannels.remove(channel);
+            }
+
+            return interceptor;
+        } catch (IllegalArgumentException e) {
+            // Try again
+            return (PacketInterceptor) channel.pipeline().get(handlerName);
+        }
+    }
+
+    /**
+     * Retrieve the Netty channel associated with a player. This is cached.
+     *
+     * @param player - the player.
+     * @return The Netty channel.
+     */
+    public Channel getChannel(Player player) {
+        Channel channel = channelLookup.get(player.getName());
+
+        // Lookup channel again
+        if (channel == null) {
+            Object connection = getConnection.get(getPlayerHandle.invoke(player));
+            Object manager = getManager.get(connection);
+
+            channelLookup.put(player.getName(), channel = getChannel.get(manager));
+        }
+
+        return channel;
+    }
+
+    /**
+     * Uninject a specific player.
+     *
+     * @param player - the injected player.
+     */
+    public void uninjectPlayer(Player player) {
+        uninjectChannel(getChannel(player));
+    }
+
+    public void uninjectPlayerAsync(Player player) {
+        Channel channel = getChannel(player);
+        uninjectChannelAsync(channel);
+    }
+
+    /**
+     * Uninject a specific channel.
+     * <p>
+     * This will also disable the automatic channel injection that occurs when a player has properly logged in.
+     *
+     * @param channel - the injected channel.
+     */
+    public void uninjectChannel(final Channel channel) {
+        // No need to guard against this if we're closing
+        if (!closed) {
+            uninjectedChannels.add(channel);
+        }
+
+        // See ChannelInjector in ProtocolLib, line 590
+        channel.pipeline().remove(handlerName);
+    }
+
+    public void uninjectChannelAsync(Channel channel) {
+        // No need to guard against this if we're closing
+        if (!closed) {
+            uninjectedChannels.add(channel);
+        }
+
+        // See ChannelInjector in ProtocolLib, line 590
+        NettyPacketManager.executorService.execute(new Runnable() {
+            @Override
+            public void run() {
+                channel.pipeline().remove(handlerName);
+            }
+        });
+
+    }
+
+    /**
+     * Determine if the given player has been injected by TinyProtocol.
+     *
+     * @param player - the player.
+     * @return TRUE if it is, FALSE otherwise.
+     */
+    public boolean hasInjected(Player player) {
+        return hasInjected(getChannel(player));
+    }
+
+    /**
+     * Determine if the given channel has been injected by TinyProtocol.
+     *
+     * @param channel - the channel.
+     * @return TRUE if it is, FALSE otherwise.
+     */
+    public boolean hasInjected(Channel channel) {
+        return channel.pipeline().get(handlerName) != null;
+    }
+
+    /**
+     * Cease listening for packets. This is called automatically when your plugin is disabled.
+     */
+    public final void close() {
+        if (!closed) {
+            closed = true;
+
+            // Remove our handlers
+            for (Player player : plugin.getServer().getOnlinePlayers()) {
+                uninjectPlayer(player);
+            }
+
+            // Clean up Bukkit
+            HandlerList.unregisterAll(listener);
+            unregisterChannelHandler();
+        }
+    }
+
+    /**
+     * Channel handler that is inserted into the player's channel pipeline, allowing us to intercept sent and received packets.
+     *
+     * @author Kristian
+     */
+    private final class PacketInterceptor extends ChannelDuplexHandler {
+        // Updated by the login event
+        public volatile Player player;
+
+        @Override
+        public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+            // Intercept channel
+            final Channel channel = ctx.channel();
+            handleLoginStart(channel, msg);
+
+            try {
+                msg = onPacketInAsync(player, channel, msg);
+            } catch (Exception e) {
+                plugin.getLogger().log(Level.SEVERE, "Error in onPacketInAsync().", e);
+            }
+
+            if (msg != null) {
+                super.channelRead(ctx, msg);
+                PacketEvents.getAPI().packetManager.postRead(player, msg);
+            }
+        }
+
+        @Override
+        public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
+            try {
+                msg = onPacketOutAsync(player, ctx.channel(), msg);
+            } catch (Exception e) {
+                plugin.getLogger().log(Level.SEVERE, "Error in onPacketOutAsync().", e);
+            }
+
+            if (msg != null) {
+                super.write(ctx, msg, promise);
+                PacketEvents.getAPI().packetManager.postWrite(player, msg);
+            }
+        }
+
+        private void handleLoginStart(Channel channel, Object packet) {
+            if (PACKET_LOGIN_IN_START.isInstance(packet)) {
+                GameProfile profile = getGameProfile.get(packet);
+                channelLookup.put(profile.getName(), channel);
+            }
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetmanager/tinyprotocol/TinyProtocol8.java

@@ -0,0 +1,558 @@
+/*
+ * This file is part of Hawk Anticheat.
+ * Copyright (C) 2018 Hawk Development Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package io.github.retrooper.packetevents.packetmanager.tinyprotocol;
+
+import com.google.common.collect.Lists;
+import com.google.common.collect.MapMaker;
+import com.mojang.authlib.GameProfile;
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.packetmanager.netty.NettyPacketManager;
+import io.github.retrooper.packetevents.packetmanager.tinyprotocol.Reflection.FieldAccessor;
+import io.github.retrooper.packetevents.packetmanager.tinyprotocol.Reflection.MethodInvoker;
+import io.netty.channel.*;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerLoginEvent;
+import org.bukkit.event.server.PluginDisableEvent;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.scheduler.BukkitRunnable;
+
+import java.util.*;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.logging.Level;
+
+/**
+ * Represents a very tiny alternative to ProtocolLib.
+ * <p>
+ * It now supports intercepting packets during login and status ping (such as OUT_SERVER_PING)!
+ *
+ * @author Kristian
+ */
+
+//BROKEN: NPEs when player joins while server is starting, and using PlayerJoinEvent instead will cause NPE for protocol version lookup.
+//Protocol version number lookup method from DeprecatedLuke's version of TinyProtocol
+public class TinyProtocol8 {
+    private static final AtomicInteger ID = new AtomicInteger();
+
+    // Used in order to lookup a channel
+    private static final MethodInvoker getPlayerHandle = Reflection.getMethod("{obc}.entity.CraftPlayer", "getHandle");
+    private static final FieldAccessor<Object> getConnection = Reflection.getField("{nms}.EntityPlayer", "playerConnection", Object.class);
+    private static final FieldAccessor<Object> getManager = Reflection.getField("{nms}.PlayerConnection", "networkManager", Object.class);
+    private static final FieldAccessor<Channel> getChannel = Reflection.getField("{nms}.NetworkManager", Channel.class, 0);
+
+    // Looking up ServerConnection
+    private static final Class<Object> minecraftServerClass = Reflection.getUntypedClass("{nms}.MinecraftServer");
+    private static final Class<Object> serverConnectionClass = Reflection.getUntypedClass("{nms}.ServerConnection");
+    private static final FieldAccessor<Object> getMinecraftServer = Reflection.getField("{obc}.CraftServer", minecraftServerClass, 0);
+    private static final FieldAccessor<Object> getServerConnection = Reflection.getField(minecraftServerClass, serverConnectionClass, 0);
+    private static final MethodInvoker getNetworkMarkers = Reflection.getTypedMethod(serverConnectionClass, null, List.class, serverConnectionClass);
+
+    // Packets we have to intercept
+    private static final Class<?> PACKET_LOGIN_IN_START = Reflection.getMinecraftClass("PacketLoginInStart");
+    private static final Class<?> PACKET_HANDSHAKING_IN_SET_PROTOCOL = Reflection.getMinecraftClass("PacketHandshakingInSetProtocol");
+    private static final FieldAccessor<GameProfile> getGameProfile = Reflection.getField(PACKET_LOGIN_IN_START, GameProfile.class, 0);
+    private static final FieldAccessor<Integer> protocolId = Reflection.getField(PACKET_HANDSHAKING_IN_SET_PROTOCOL, int.class, 0);
+    private static final FieldAccessor<Enum> protocolType = Reflection.getField(PACKET_HANDSHAKING_IN_SET_PROTOCOL, Enum.class, 0);
+
+    // Speedup channel/protocol lookup
+    private Map<String, Channel> channelLookup = new MapMaker().weakValues().makeMap();
+    private Listener listener;
+
+    // Channels that have already been removed
+    public Set<Channel> uninjectedChannels = Collections.newSetFromMap(new MapMaker().weakKeys().<Channel, Boolean>makeMap());
+
+    // List of network markers
+    private List<Object> networkManagers;
+
+    // Injected channel handlers
+    private List<Channel> serverChannels = Lists.newArrayList();
+    private ChannelInboundHandlerAdapter serverChannelHandler;
+    private ChannelInitializer<Channel> beginInitProtocol;
+    private ChannelInitializer<Channel> endInitProtocol;
+
+    // Current handler name
+    private String handlerName;
+
+    protected volatile boolean closed;
+    protected Plugin plugin;
+
+    /**
+     * Construct a new instance of TinyProtocol, and start intercepting packets for all connected clients and future clients.
+     * <p>
+     * You can construct multiple instances per plugin.
+     *
+     * @param plugin - the plugin.
+     */
+    public TinyProtocol8(final Plugin plugin) {
+        this.plugin = plugin;
+
+        // Compute handler name
+        this.handlerName = getHandlerName();
+
+        try {
+            registerChannelHandler();
+            registerPlayers(plugin);
+        } catch (IllegalArgumentException ex) {
+            // Damn you, late bind
+            plugin.getLogger().info("Delaying server channel injection due to late bind.");
+
+            new BukkitRunnable() {
+                @Override
+                public void run() {
+                    registerChannelHandler();
+                    registerPlayers(plugin);
+                    plugin.getLogger().info("Late bind injection successful.");
+                }
+            }.runTask(plugin);
+        }
+    }
+
+    private void createServerChannelHandler() {
+        // Handle connected channels
+        endInitProtocol = new ChannelInitializer<Channel>() {
+
+            @Override
+            protected void initChannel(Channel channel) throws Exception {
+                try {
+                    // This can take a while, so we need to stop the main thread from interfering
+                    synchronized (networkManagers) {
+                        // Stop injecting channels
+                        if (!closed) {
+                            channel.eventLoop().submit(() -> injectChannelInternal(channel));
+                        }
+                    }
+                } catch (Exception e) {
+                    plugin.getLogger().log(Level.SEVERE, "Cannot inject incomming channel " + channel, e);
+                }
+            }
+
+        };
+
+        // This is executed before Minecraft's channel handler
+        beginInitProtocol = new ChannelInitializer<Channel>() {
+
+            @Override
+            protected void initChannel(Channel channel) throws Exception {
+                channel.pipeline().addLast(endInitProtocol);
+            }
+
+        };
+
+        serverChannelHandler = new ChannelInboundHandlerAdapter() {
+
+            @Override
+            public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+                Channel channel = (Channel) msg;
+
+                // Prepare to initialize ths channel
+                channel.pipeline().addFirst(beginInitProtocol);
+                ctx.fireChannelRead(msg);
+            }
+
+        };
+    }
+
+    /**
+     * Register bukkit events.
+     */
+
+    @SuppressWarnings("unchecked")
+    private void registerChannelHandler() {
+        Object mcServer = getMinecraftServer.get(Bukkit.getServer());
+        Object serverConnection = getServerConnection.get(mcServer);
+        boolean looking = true;
+
+        // We need to synchronize against this list
+        networkManagers = (List<Object>) getNetworkMarkers.invoke(null, serverConnection);
+        createServerChannelHandler();
+
+        // Find the correct list, or implicitly throw an exception
+        for (int i = 0; looking; i++) {
+            List<Object> list = Reflection.getField(serverConnection.getClass(), List.class, i).get(serverConnection);
+
+            for (Object item : list) {
+                if (!(item instanceof ChannelFuture))
+                    break;
+
+                // Channel future that contains the server connection
+                Channel serverChannel = ((ChannelFuture) item).channel();
+
+                serverChannels.add(serverChannel);
+                serverChannel.pipeline().addFirst(serverChannelHandler);
+                looking = false;
+            }
+        }
+    }
+
+    private void unregisterChannelHandler() {
+        if (serverChannelHandler == null)
+            return;
+
+        for (Channel serverChannel : serverChannels) {
+            final ChannelPipeline pipeline = serverChannel.pipeline();
+
+            // Remove channel handler
+            serverChannel.eventLoop().execute(new Runnable() {
+
+                @Override
+                public void run() {
+                    try {
+                        pipeline.remove(serverChannelHandler);
+                    } catch (NoSuchElementException e) {
+                        // That's fine
+                    }
+                }
+
+            });
+        }
+    }
+
+    private void registerPlayers(Plugin plugin) {
+        for (Player player : plugin.getServer().getOnlinePlayers()) {
+            injectPlayer(player);
+        }
+    }
+
+    /**
+     * Invoked when the server is starting to send a packet to a player.
+     * <p>
+     * Note that this is not executed on the main thread.
+     *
+     * @param receiver - the receiving player, NULL for early login/status packets.
+     * @param channel  - the channel that received the packet. Never NULL.
+     * @param packet   - the packet being sent.
+     * @return The packet to send instead, or NULL to cancel the transmission.
+     */
+    public Object onPacketOutAsync(Player receiver, Channel channel, Object packet) {
+        return PacketEvents.getAPI().packetManager.write(receiver, channel, packet);
+    }
+
+    /**
+     * Invoked when the server has received a packet from a given player.
+     * <p>
+     * Use {@link Channel#remoteAddress()} to get the remote address of the client.
+     *
+     * @param sender  - the player that sent the packet, NULL for early login/status packets.
+     * @param channel - channel that received the packet. Never NULL.
+     * @param packet  - the packet being received.
+     * @return The packet to recieve instead, or NULL to cancel.
+     */
+    public Object onPacketInAsync(Player sender, Channel channel, Object packet) {
+        return PacketEvents.getAPI().packetManager.read(sender, channel, packet);
+    }
+
+    /**
+     * Send a packet to a particular player.
+     * <p>
+     * Note that {@link #onPacketOutAsync(Player, Channel, Object)} will be invoked with this packet.
+     *
+     * @param player - the destination player.
+     * @param packet - the packet to send.
+     */
+    public void sendPacket(Player player, Object packet) {
+        sendPacket(getChannel(player), packet);
+    }
+
+    /**
+     * Send a packet to a particular client.
+     * <p>
+     * Note that {@link #onPacketOutAsync(Player, Channel, Object)} will be invoked with this packet.
+     *
+     * @param channel - client identified by a channel.
+     * @param packet  - the packet to send.
+     */
+    public void sendPacket(Channel channel, Object packet) {
+        channel.pipeline().writeAndFlush(packet);
+    }
+
+    public void sendPacket(Object channel, Object packet) {
+        sendPacket((Channel) channel, packet);
+    }
+
+    /**
+     * Pretend that a given packet has been received from a player.
+     * <p>
+     * Note that {@link #onPacketInAsync(Player, Channel, Object)} will be invoked with this packet.
+     *
+     * @param player - the player that sent the packet.
+     * @param packet - the packet that will be received by the server.
+     */
+    public void receivePacket(Player player, Object packet) {
+        receivePacket(getChannel(player), packet);
+    }
+
+    /**
+     * Pretend that a given packet has been received from a given client.
+     * <p>
+     * Note that {@link #onPacketInAsync(Player, Channel, Object)} will be invoked with this packet.
+     *
+     * @param channel - client identified by a channel.
+     * @param packet  - the packet that will be received by the server.
+     */
+    public void receivePacket(Channel channel, Object packet) {
+        channel.pipeline().context("encoder").fireChannelRead(packet);
+    }
+
+    /**
+     * Retrieve the name of the channel injector, default implementation is "tiny-" + plugin name + "-" + a unique ID.
+     * <p>
+     * Note that this method will only be invoked once. It is no longer necessary to override this to support multiple instances.
+     *
+     * @return A unique channel handler name.
+     */
+    protected String getHandlerName() {
+        return "PacketEvents-" + ID.incrementAndGet();
+    }
+
+    /**
+     * Add a custom channel handler to the given player's channel pipeline, allowing us to intercept sent and received packets.
+     * <p>
+     * This will automatically be called when a player has logged in.
+     *
+     * @param player - the player to inject.
+     */
+    public void injectPlayer(Player player) {
+        injectChannelInternal(getChannel(player)).player = player;
+    }
+
+    public void injectPlayerAsync(Player player) {
+        Channel channel = getChannel(player);
+        injectChannelInternalAsync(channel).player = player;
+    }
+
+    /**
+     * Add a custom channel handler to the given channel.
+     *
+     * @param channel - the channel to inject.
+     */
+    public void injectChannel(Channel channel) {
+        injectChannelInternal(channel);
+    }
+
+    public void injectChannelAsync(Channel channel) {
+        injectChannelInternalAsync(channel);
+    }
+
+    /**
+     * Add a custom channel handler to the given channel.
+     *
+     * @param channel - the channel to inject.
+     * @return The packet interceptor.
+     */
+    private PacketInterceptor injectChannelInternal(Channel channel) {
+        try {
+            PacketInterceptor interceptor = (PacketInterceptor) channel.pipeline().get(handlerName);
+
+            // Inject our packet interceptor
+            if (interceptor == null) {
+                interceptor = new PacketInterceptor();
+                channel.pipeline().addBefore("packet_handler", handlerName, interceptor);
+                uninjectedChannels.remove(channel);
+            }
+
+            return interceptor;
+        } catch (IllegalArgumentException e) {
+            // Try again
+            return (PacketInterceptor) channel.pipeline().get(handlerName);
+        }
+    }
+
+    private PacketInterceptor injectChannelInternalAsync(Channel channel) {
+        try {
+            PacketInterceptor interceptor = (PacketInterceptor) channel.pipeline().get(handlerName);
+
+            // Inject our packet interceptor
+            if (interceptor == null) {
+                interceptor = new PacketInterceptor();
+                final PacketInterceptor pi = interceptor;
+                NettyPacketManager.executorService.execute(new Runnable() {
+                    @Override
+                    public void run() {
+                        channel.pipeline().addBefore("packet_handler", handlerName, pi);
+                    }
+                });
+
+                uninjectedChannels.remove(channel);
+            }
+
+            return interceptor;
+        } catch (IllegalArgumentException e) {
+            // Try again
+            return (PacketInterceptor) channel.pipeline().get(handlerName);
+        }
+    }
+
+    /**
+     * Retrieve the Netty channel associated with a player. This is cached.
+     *
+     * @param player - the player.
+     * @return The Netty channel.
+     */
+    public Channel getChannel(Player player) {
+        Channel channel = channelLookup.get(player.getName());
+
+        // Lookup channel again
+        if (channel == null) {
+            Object connection = getConnection.get(getPlayerHandle.invoke(player));
+            Object manager = getManager.get(connection);
+
+            channelLookup.put(player.getName(), channel = getChannel.get(manager));
+        }
+
+        return channel;
+    }
+
+    /**
+     * Uninject a specific player.
+     *
+     * @param player - the injected player.
+     */
+    public void uninjectPlayer(Player player) {
+        uninjectChannel(getChannel(player));
+    }
+
+    public void uninjectPlayerAsync(Player player) {
+        Channel channel = getChannel(player);
+        uninjectChannelAsync(channel);
+    }
+
+    /**
+     * Uninject a specific channel.
+     * <p>
+     * This will also disable the automatic channel injection that occurs when a player has properly logged in.
+     *
+     * @param channel - the injected channel.
+     */
+    public void uninjectChannel(final Channel channel) {
+        // No need to guard against this if we're closing
+        if (!closed) {
+            uninjectedChannels.add(channel);
+        }
+
+        // See ChannelInjector in ProtocolLib, line 590
+        channel.pipeline().remove(handlerName);
+    }
+
+    public void uninjectChannelAsync(Channel channel) {
+        // No need to guard against this if we're closing
+        if (!closed) {
+            uninjectedChannels.add(channel);
+        }
+
+        // See ChannelInjector in ProtocolLib, line 590
+        NettyPacketManager.executorService.execute(new Runnable() {
+            @Override
+            public void run() {
+                channel.pipeline().remove(handlerName);
+            }
+        });
+
+    }
+
+    /**
+     * Determine if the given player has been injected by TinyProtocol.
+     *
+     * @param player - the player.
+     * @return TRUE if it is, FALSE otherwise.
+     */
+    public boolean hasInjected(Player player) {
+        return hasInjected(getChannel(player));
+    }
+
+    /**
+     * Determine if the given channel has been injected by TinyProtocol.
+     *
+     * @param channel - the channel.
+     * @return TRUE if it is, FALSE otherwise.
+     */
+    public boolean hasInjected(Channel channel) {
+        return channel.pipeline().get(handlerName) != null;
+    }
+
+    /**
+     * Cease listening for packets. This is called automatically when your plugin is disabled.
+     */
+    public final void close() {
+        if (!closed) {
+            closed = true;
+
+            // Remove our handlers
+            for (Player player : plugin.getServer().getOnlinePlayers()) {
+                uninjectPlayer(player);
+            }
+
+            // Clean up Bukkit
+            HandlerList.unregisterAll(listener);
+            unregisterChannelHandler();
+        }
+    }
+
+    /**
+     * Channel handler that is inserted into the player's channel pipeline, allowing us to intercept sent and received packets.
+     *
+     * @author Kristian
+     */
+    private final class PacketInterceptor extends ChannelDuplexHandler {
+        // Updated by the login event
+        public volatile Player player;
+
+        @Override
+        public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+            // Intercept channel
+            final Channel channel = ctx.channel();
+            handleLoginStart(channel, msg);
+
+            try {
+                msg = onPacketInAsync(player, channel, msg);
+            } catch (Exception e) {
+                plugin.getLogger().log(Level.SEVERE, "Error in onPacketInAsync().", e);
+            }
+
+            if (msg != null) {
+                super.channelRead(ctx, msg);
+                PacketEvents.getAPI().packetManager.postRead(player, msg);
+            }
+        }
+
+        @Override
+        public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
+            try {
+                msg = onPacketOutAsync(player, ctx.channel(), msg);
+            } catch (Exception e) {
+                plugin.getLogger().log(Level.SEVERE, "Error in onPacketOutAsync().", e);
+            }
+
+            if (msg != null) {
+                super.write(ctx, msg, promise);
+                PacketEvents.getAPI().packetManager.postWrite(player, msg);
+            }
+        }
+
+        private void handleLoginStart(Channel channel, Object packet) {
+            if (PACKET_LOGIN_IN_START.isInstance(packet)) {
+                GameProfile profile = getGameProfile.get(packet);
+                channelLookup.put(profile.getName(), channel);
+            }
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/packettype/PacketType.java

@@ -1,12 +1,62 @@
-package io.github.retrooper.packetevents.packet;
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packettype;
 
 import java.util.HashMap;
 import java.util.Map;
 
 public class PacketType {
+    public static class Status {
+        public static final Map<Class<?>, Byte> packetIds = new HashMap<>();
+        public static final byte PING = 0, PONG = 1;
+
+        public static void init() {
+            packetIds.put(PacketTypeClasses.Status.PING, PING);
+            packetIds.put(PacketTypeClasses.Status.PONG, PONG);
+        }
+    }
+    public static class Login {
+        public static final Map<Class<?>, Byte> packetIds = new HashMap<>();
+        public static final byte HANDSHAKE = 0,
+        IN_CUSTOM_PAYLOAD = 1, OUT_CUSTOM_PAYLOAD = 2,IN_START = 3, IN_ENCRYPTION_BEGIN = 4,
+        DISCONNECT = 5, OUT_ENCRYPTION_BEGIN = 6, OUT_SUCCESS = 7;
+
+        public static void init() {
+            packetIds.put(PacketTypeClasses.Login.HANDSHAKE, HANDSHAKE);
+            packetIds.put(PacketTypeClasses.Login.IN_CUSTOM_PAYLOAD, IN_CUSTOM_PAYLOAD);
+            packetIds.put(PacketTypeClasses.Login.OUT_CUSTOM_PAYLOAD, OUT_CUSTOM_PAYLOAD);
+            packetIds.put(PacketTypeClasses.Login.IN_START, IN_START);
+            packetIds.put(PacketTypeClasses.Login.IN_ENCRYPTION_BEGIN, IN_ENCRYPTION_BEGIN);
+            packetIds.put(PacketTypeClasses.Login.DISCONNECT, DISCONNECT);
+            packetIds.put(PacketTypeClasses.Login.OUT_ENCRYPTION_BEGIN, OUT_ENCRYPTION_BEGIN);
+            packetIds.put(PacketTypeClasses.Login.OUT_SUCCESS, OUT_SUCCESS);
+        }
+    }
 
     public static class Client {
-        public static final Map<Class<?>, Byte> packetIds = new HashMap<Class<?>, Byte>();
+        public static final Map<Class<?>, Byte> packetIds = new HashMap<>();
         public static final byte TELEPORT_ACCEPT = 0,
                 TILE_NBT_QUERY = 1, DIFFICULTY_CHANGE = 2, CHAT = 3, CLIENT_COMMAND = 4,
                 SETTINGS = 5, TAB_COMPLETE = 6, TRANSACTION = 7, ENCHANT_ITEM = 8,
@@ -72,18 +122,24 @@ public class PacketType {
         }
 
         public static class Util {
-            public static boolean isInstanceOfFlying(final byte packetId) {
-                return packetId == FLYING
-                        || packetId == POSITION
-                        || packetId == POSITION_LOOK
-                        || packetId == LOOK;
+            /**
+             * Is the packet an instance of the PacketPlayInFlying packet?
+             *
+             * @param packetID
+             * @return packetID == FLYING or POSITION or POSITION_LOOK or LOOK
+             */
+            public static boolean isInstanceOfFlying(final byte packetID) {
+                return packetID == FLYING
+                        || packetID == POSITION
+                        || packetID == POSITION_LOOK
+                        || packetID == LOOK;
             }
         }
     }
 
     public static class Server {
-        public static final Map<Class<?>, Byte> packetIds = new HashMap<Class<?>, Byte>();
-        public static byte SPAWN_ENTITY = 0, SPAWN_ENTITY_EXPERIENCE_ORB = 1, SPAWN_ENTITY_WEATHER = 2, SPAWN_ENTITY_LIVING = 3,
+        public static final Map<Class<?>, Byte> packetIds = new HashMap<>();
+        public static final byte SPAWN_ENTITY = 0, SPAWN_ENTITY_EXPERIENCE_ORB = 1, SPAWN_ENTITY_WEATHER = 2, SPAWN_ENTITY_LIVING = 3,
                 SPAWN_ENTITY_PAINTING = 4, SPAWN_ENTITY_SPAWN = 5, ANIMATION = 6, STATISTIC = 7,
                 BLOCK_BREAK = 8, BLOCK_BREAK_ANIMATION = 9, TILE_ENTITY_DATA = 10, BLOCK_ACTION = 11,
                 BLOCK_CHANGE = 12, BOSS = 13, SERVER_DIFFICULTY = 14, CHAT = 15, MULTI_BLOCK_CHANGE = 16,
@@ -133,6 +189,7 @@ public class PacketType {
             packetIds.put(PacketTypeClasses.Server.WINDOW_ITEMS, WINDOW_ITEMS);
             packetIds.put(PacketTypeClasses.Server.WINDOW_DATA, WINDOW_DATA);
             packetIds.put(PacketTypeClasses.Server.SET_SLOT, SET_SLOT);
+            packetIds.put(PacketTypeClasses.Server.SET_COOLDOWN, SET_COOLDOWN);
             packetIds.put(PacketTypeClasses.Server.CUSTOM_PAYLOAD, CUSTOM_PAYLOAD);
             packetIds.put(PacketTypeClasses.Server.CUSTOM_SOUND_EFFECT, CUSTOM_SOUND_EFFECT);
             packetIds.put(PacketTypeClasses.Server.KICK_DISCONNECT, KICK_DISCONNECT);
@@ -143,6 +200,7 @@ public class PacketType {
             packetIds.put(PacketTypeClasses.Server.OPEN_WINDOW_HORSE, OPEN_WINDOW_HORSE);
             packetIds.put(PacketTypeClasses.Server.KEEP_ALIVE, KEEP_ALIVE);
             packetIds.put(PacketTypeClasses.Server.MAP_CHUNK, MAP_CHUNK);
+            packetIds.put(PacketTypeClasses.Server.WORLD_EVENT, WORLD_EVENT);
             packetIds.put(PacketTypeClasses.Server.WORLD_EVENT, SPAWN_ENTITY);
             packetIds.put(PacketTypeClasses.Server.WORLD_PARTICLES, WORLD_PARTICLES);
             packetIds.put(PacketTypeClasses.Server.LIGHT_UPDATE, LIGHT_UPDATE);
@@ -205,9 +263,15 @@ public class PacketType {
         }
 
         public static class Util {
-            public static boolean isInstanceOfEntity(final byte packetId) {
-                return packetId == ENTITY || packetId == REL_ENTITY_MOVE ||
-                        packetId == REL_ENTITY_MOVE_LOOK || packetId == ENTITY_LOOK;
+            /**
+             * Is the packet an instance of the PacketPlayOutEntity packet?
+             *
+             * @param packetID
+             * @return packetID == ENTITY or REL_ENTITY_MOVE or REL_ENTITY_MOVE_LOOK or ENTITY_LOOK
+             */
+            public static boolean isInstanceOfEntity(final byte packetID) {
+                return packetID == ENTITY || packetID == REL_ENTITY_MOVE ||
+                        packetID == REL_ENTITY_MOVE_LOOK || packetID == ENTITY_LOOK;
             }
         }
     }

src/main/java/io/github/retrooper/packetevents/packettype/PacketTypeClasses.java

@@ -1,15 +1,64 @@
-package io.github.retrooper.packetevents.packet;
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
 
-import io.github.retrooper.packetevents.annotations.Nullable;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+package io.github.retrooper.packetevents.packettype;
+
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.github.retrooper.packetevents.utils.reflection.SubclassUtil;
 
 public class PacketTypeClasses {
+    public static class Status {
+        public static Class<?> PING, PONG;
+
+        public static void load() {
+            PING = NMSUtils.getNMSClassWithoutException("PacketStatusInPing");
+            PONG = NMSUtils.getNMSClassWithoutException("PacketStatusOutPong");
+            PacketType.Status.init();
+        }
+    }
+    public static class Login {
+        public static Class<?>  HANDSHAKE,
+                IN_CUSTOM_PAYLOAD, OUT_CUSTOM_PAYLOAD,IN_START, IN_ENCRYPTION_BEGIN,
+                DISCONNECT, OUT_ENCRYPTION_BEGIN, OUT_SUCCESS;
+
+        public static void load() {
+            HANDSHAKE = NMSUtils.getNMSClassWithoutException("PacketHandshakingInSetProtocol");
+            //In and Out custom payload login packets have been here since AROUND 1.13.2?
+            IN_CUSTOM_PAYLOAD = NMSUtils.getNMSClassWithoutException("PacketLoginInCustomPayload");
+            OUT_CUSTOM_PAYLOAD = NMSUtils.getNMSClassWithoutException("PacketLoginOutCustomPayload");
+            IN_START = NMSUtils.getNMSClassWithoutException("PacketLoginInStart");
+            IN_ENCRYPTION_BEGIN = NMSUtils.getNMSClassWithoutException("PacketLoginInEncryptionBegin");
+            DISCONNECT = NMSUtils.getNMSClassWithoutException("PacketLoginOutDisconnect");
+            OUT_ENCRYPTION_BEGIN = NMSUtils.getNMSClassWithoutException("PacketLoginOutEncryptionBegin");
+            OUT_SUCCESS = NMSUtils.getNMSClassWithoutException("PacketLoginOutSuccess");
+            PacketType.Login.init();
+        }
+    }
+
     public static class Client {
         private static final String c = "PacketPlayIn";
-        @Nullable
-        public static final Class<?> FLYING = NMSUtils.getNMSClassWithoutException(c + "Flying");
-        public static Class<?> POSITION, POSITION_LOOK, LOOK, CLIENT_COMMAND,
+        public static Class<?> FLYING, POSITION, POSITION_LOOK, LOOK, CLIENT_COMMAND,
                 TRANSACTION, BLOCK_DIG, ENTITY_ACTION, USE_ENTITY,
                 WINDOW_CLICK, STEER_VEHICLE, CUSTOM_PAYLOAD, ARM_ANIMATION,
                 BLOCK_PLACE, USE_ITEM, ABILITIES, HELD_ITEM_SLOT,
@@ -21,15 +70,19 @@ public class PacketTypeClasses {
                 ADVANCEMENTS, TR_SEL, BEACON, SET_COMMAND_BLOCK,
                 SET_COMMAND_MINECART, SET_JIGSAW, STRUCT, UPDATE_SIGN, SPECTATE;
 
+        /**
+         * Initiate all server-bound packet classes.
+         */
         public static void load() {
+            FLYING = NMSUtils.getNMSClassWithoutException(c + "Flying");
             try {
                 POSITION = NMSUtils.getNMSClass(c + "Position");
                 POSITION_LOOK = NMSUtils.getNMSClass(c + "PositionLook");
                 LOOK = NMSUtils.getNMSClass(c + "Look");
             } catch (ClassNotFoundException e) {
-                POSITION = Reflection.getSubClass(FLYING, c + "Position");
-                POSITION_LOOK = Reflection.getSubClass(FLYING, c + "PositionLook");
-                LOOK = Reflection.getSubClass(FLYING, c + "Look");
+                POSITION = SubclassUtil.getSubClass(FLYING, c + "Position");
+                POSITION_LOOK = SubclassUtil.getSubClass(FLYING, c + "PositionLook");
+                LOOK = SubclassUtil.getSubClass(FLYING, c + "Look");
             }
 
             try {
@@ -81,23 +134,20 @@ public class PacketTypeClasses {
             } catch (ClassNotFoundException e) {
                 e.printStackTrace();
             }
-            //Block place
+
             try {
                 BLOCK_PLACE = NMSUtils.getNMSClass(c + "BlockPlace");
             } catch (ClassNotFoundException e) {
-                //They are just on a newer version
-                try {
-                    USE_ITEM = NMSUtils.getNMSClass(c + "UseItem");
-                } catch (ClassNotFoundException e2) {
-                    e.printStackTrace();
-                    e2.printStackTrace();
-                }
-            }
 
+            }
+            try {
+                USE_ITEM = NMSUtils.getNMSClass(c + "UseItem");
+            } catch (ClassNotFoundException e2) {
+
+            }
 
             PacketType.Client.init();
         }
-
     }
 
     public static class Server {
@@ -126,6 +176,9 @@ public class PacketTypeClasses {
                 NBT_QUERY, COLLECT, ENTITY_TELEPORT, ADVANCEMENTS, UPDATE_ATTRIBUTES,
                 ENTITY_EFFECT, RECIPE_UPDATE, TAGS, MAP_CHUNK_BULK;
 
+        /**
+         * Initiate all client-bound packet classes.
+         */
         public static void load() {
             SPAWN_ENTITY = NMSUtils.getNMSClassWithoutException(s + "SpawnEntity");
             SPAWN_ENTITY_EXPERIENCE_ORB = NMSUtils.getNMSClassWithoutException(s + "SpawnEntityExperienceOrb");
@@ -169,9 +222,9 @@ public class PacketTypeClasses {
             MAP = NMSUtils.getNMSClassWithoutException(s + "Map");
             OPEN_WINDOW_MERCHANT = NMSUtils.getNMSClassWithoutException(s + "OpenWindowMerchant");
             ENTITY = NMSUtils.getNMSClassWithoutException(s + "Entity");
-            REL_ENTITY_MOVE = Reflection.getSubClass(ENTITY, s + "RelEntityMove");
-            REL_ENTITY_MOVE_LOOK = Reflection.getSubClass(ENTITY, s + "RelEntityMoveLook");
-            ENTITY_LOOK = Reflection.getSubClass(ENTITY, s + "EntityLook");
+            REL_ENTITY_MOVE = SubclassUtil.getSubClass(ENTITY, s + "RelEntityMove");
+            REL_ENTITY_MOVE_LOOK = SubclassUtil.getSubClass(ENTITY, s + "RelEntityMoveLook");
+            ENTITY_LOOK = SubclassUtil.getSubClass(ENTITY, s + "EntityLook");
             if (REL_ENTITY_MOVE == null) {
                 //is not a subclass and should be accessed normally
                 REL_ENTITY_MOVE = NMSUtils.getNMSClassWithoutException(s + "RelEntityMove");

src/main/java/io/github/retrooper/packetevents/packetwrappers/Sendable.java

@@ -1,5 +0,0 @@
-package io.github.retrooper.packetevents.packetwrappers;
-
-public interface Sendable {
-    Object asNMSPacket();
-}

src/main/java/io/github/retrooper/packetevents/packetwrappers/SendableWrapper.java

@@ -0,0 +1,32 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers;
+
+/**
+ * This interface indicates that a packet wrapper supports being sent to a client.
+ */
+public interface SendableWrapper {
+    Object asNMSPacket();
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/WrappedPacket.java

@@ -0,0 +1,629 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers;
+
+import io.github.retrooper.packetevents.exceptions.WrapperFieldNotFoundException;
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.in.blockdig.WrappedPacketInBlockDig;
+import io.github.retrooper.packetevents.packetwrappers.in.blockplace.WrappedPacketInBlockPlace;
+import io.github.retrooper.packetevents.packetwrappers.in.clientcommand.WrappedPacketInClientCommand;
+import io.github.retrooper.packetevents.packetwrappers.in.custompayload.WrappedPacketInCustomPayload;
+import io.github.retrooper.packetevents.packetwrappers.in.entityaction.WrappedPacketInEntityAction;
+import io.github.retrooper.packetevents.packetwrappers.in.keepalive.WrappedPacketInKeepAlive;
+import io.github.retrooper.packetevents.packetwrappers.in.settings.WrappedPacketInSettings;
+import io.github.retrooper.packetevents.packetwrappers.in.updatesign.WrappedPacketInUpdateSign;
+import io.github.retrooper.packetevents.packetwrappers.in.useentity.WrappedPacketInUseEntity;
+import io.github.retrooper.packetevents.packetwrappers.in.windowclick.WrappedPacketInWindowClick;
+import io.github.retrooper.packetevents.packetwrappers.out.abilities.WrappedPacketOutAbilities;
+import io.github.retrooper.packetevents.packetwrappers.out.animation.WrappedPacketOutAnimation;
+import io.github.retrooper.packetevents.packetwrappers.out.chat.WrappedPacketOutChat;
+import io.github.retrooper.packetevents.packetwrappers.out.custompayload.WrappedPacketOutCustomPayload;
+import io.github.retrooper.packetevents.packetwrappers.out.entity.WrappedPacketOutEntity;
+import io.github.retrooper.packetevents.packetwrappers.out.entitystatus.WrappedPacketOutEntityStatus;
+import io.github.retrooper.packetevents.packetwrappers.out.entityteleport.WrappedPacketOutEntityTeleport;
+import io.github.retrooper.packetevents.packetwrappers.out.entityvelocity.WrappedPacketOutEntityVelocity;
+import io.github.retrooper.packetevents.packetwrappers.out.experience.WrappedPacketOutExperience;
+import io.github.retrooper.packetevents.packetwrappers.out.explosion.WrappedPacketOutExplosion;
+import io.github.retrooper.packetevents.packetwrappers.out.gamestatechange.WrappedPacketOutGameStateChange;
+import io.github.retrooper.packetevents.packetwrappers.out.keepalive.WrappedPacketOutKeepAlive;
+import io.github.retrooper.packetevents.packetwrappers.out.kickdisconnect.WrappedPacketOutKickDisconnect;
+import io.github.retrooper.packetevents.packetwrappers.out.position.WrappedPacketOutPosition;
+import io.github.retrooper.packetevents.packetwrappers.out.transaction.WrappedPacketOutTransaction;
+import io.github.retrooper.packetevents.packetwrappers.out.updatehealth.WrappedPacketOutUpdateHealth;
+import io.github.retrooper.packetevents.utils.reflection.ClassUtil;
+import io.github.retrooper.packetevents.utils.server.ServerVersion;
+import org.bukkit.entity.Player;
+
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class WrappedPacket implements WrapperPacketReader, WrapperPacketWriter {
+    private static final Map<Class<?>, Map<Class<?>, Field[]>> fieldCache = new HashMap<>();
+    public static ServerVersion version;
+    protected final Player player;
+    protected Object packet;
+    private Class<?> packetClass;
+
+    public WrappedPacket() {
+        this.player = null;
+    }
+
+    public WrappedPacket(final Object packet) {
+        this(packet, packet.getClass());
+    }
+
+    public WrappedPacket(final Object packet, final Class<?> packetClass) {
+        this(null, packet, packetClass);
+    }
+
+    public WrappedPacket(final Player player, final Object packet) {
+        this(player, packet, packet.getClass());
+    }
+
+    public WrappedPacket(final Player player, final Object packet, Class<?> packetClass) {
+        if (packet == null) {
+            this.player = null;
+            return;
+        }
+        if (packet.getClass().getSuperclass().equals(PacketTypeClasses.Client.FLYING)) {
+            packetClass = PacketTypeClasses.Client.FLYING;
+        } else if (packet.getClass().getSuperclass().equals(PacketTypeClasses.Server.ENTITY)) {
+            packetClass = PacketTypeClasses.Server.ENTITY;
+        }
+        this.packetClass = packetClass;
+
+
+        if (!fieldCache.containsKey(packetClass)) {
+            final Field[] declaredFields = packetClass.getDeclaredFields();
+            List<Field> boolFields = new ArrayList<>();
+            List<Field> byteFields = new ArrayList<>();
+            List<Field> shortFields = new ArrayList<>();
+            List<Field> intFields = new ArrayList<>();
+            List<Field> longFields = new ArrayList<>();
+            List<Field> floatFields = new ArrayList<>();
+            List<Field> doubleFields = new ArrayList<>();
+            List<Field> stringFields = new ArrayList<>();
+
+            List<Field> boolArrayFields = new ArrayList<>();
+            List<Field> byteArrayFields = new ArrayList<>();
+            List<Field> shortArrayFields = new ArrayList<>();
+            List<Field> intArrayFields = new ArrayList<>();
+            List<Field> longArrayFields = new ArrayList<>();
+            List<Field> floatArrayFields = new ArrayList<>();
+            List<Field> doubleArrayFields = new ArrayList<>();
+            List<Field> stringArrayFields = new ArrayList<>();
+
+            for (Field f : declaredFields) {
+                f.setAccessible(true);
+                if (f.getType().equals(boolean.class)) {
+                    boolFields.add(f);
+                } else if (f.getType().equals(byte.class)) {
+                    byteFields.add(f);
+                } else if (f.getType().equals(short.class)) {
+                    shortFields.add(f);
+                } else if (f.getType().equals(int.class)) {
+                    intFields.add(f);
+                } else if (f.getType().equals(long.class)) {
+                    longFields.add(f);
+                } else if (f.getType().equals(float.class)) {
+                    floatFields.add(f);
+                } else if (f.getType().equals(double.class)) {
+                    doubleFields.add(f);
+                } else if (f.getType().equals(String.class)) {
+                    stringFields.add(f);
+                } else if (f.getType().equals(boolean[].class)) {
+                    boolArrayFields.add(f);
+                } else if (f.getType().equals(byte[].class)) {
+                    byteArrayFields.add(f);
+                } else if (f.getType().equals(short[].class)) {
+                    shortArrayFields.add(f);
+                } else if (f.getType().equals(int[].class)) {
+                    intArrayFields.add(f);
+                } else if (f.getType().equals(long[].class)) {
+                    longArrayFields.add(f);
+                } else if (f.getType().equals(float[].class)) {
+                    floatArrayFields.add(f);
+                } else if (f.getType().equals(double[].class)) {
+                    doubleArrayFields.add(f);
+                } else if (f.getType().equals(String[].class)) {
+                    stringArrayFields.add(f);
+                }
+            }
+
+            Map<Class<?>, Field[]> map = new HashMap<>();
+            if (!boolFields.isEmpty()) {
+                map.put(boolean.class, boolFields.toArray(new Field[0]));
+            }
+
+            if (!byteFields.isEmpty()) {
+                map.put(byte.class, byteFields.toArray(new Field[0]));
+            }
+
+            if (!shortFields.isEmpty()) {
+                map.put(short.class, shortFields.toArray(new Field[0]));
+            }
+
+            if (!intFields.isEmpty()) {
+                map.put(int.class, intFields.toArray(new Field[0]));
+            }
+
+            if (!longFields.isEmpty()) {
+                map.put(long.class, longFields.toArray(new Field[0]));
+            }
+
+            if (!floatFields.isEmpty()) {
+                map.put(float.class, floatFields.toArray(new Field[0]));
+            }
+
+            if (!doubleFields.isEmpty()) {
+                map.put(double.class, doubleFields.toArray(new Field[0]));
+            }
+
+            if (!stringFields.isEmpty()) {
+                map.put(String.class, stringFields.toArray(new Field[0]));
+            }
+
+            if (!boolArrayFields.isEmpty()) {
+                map.put(boolean[].class, boolArrayFields.toArray(new Field[0]));
+            }
+
+            if (!byteArrayFields.isEmpty()) {
+                map.put(byte[].class, byteArrayFields.toArray(new Field[0]));
+            }
+
+            if (!shortArrayFields.isEmpty()) {
+                map.put(short[].class, shortArrayFields.toArray(new Field[0]));
+            }
+
+            if (!intArrayFields.isEmpty()) {
+                map.put(int[].class, intArrayFields.toArray(new Field[0]));
+            }
+
+            if (!longArrayFields.isEmpty()) {
+                map.put(long[].class, longArrayFields.toArray(new Field[0]));
+            }
+
+            if (!floatArrayFields.isEmpty()) {
+                map.put(float[].class, floatArrayFields.toArray(new Field[0]));
+            }
+
+            if (!doubleArrayFields.isEmpty()) {
+                map.put(double[].class, doubleArrayFields.toArray(new Field[0]));
+            }
+
+            if (!stringArrayFields.isEmpty()) {
+                map.put(String[].class, stringArrayFields.toArray(new Field[0]));
+            }
+            fieldCache.put(packetClass, map);
+        }
+        this.player = player;
+        this.packet = packet;
+        setup();
+    }
+
+    public static void loadAllWrappers() {
+        //SERVER BOUND
+        WrappedPacketInBlockDig.load();
+        WrappedPacketInBlockPlace.load();
+        WrappedPacketInClientCommand.load();
+        WrappedPacketInCustomPayload.load();
+        WrappedPacketInEntityAction.load();
+        WrappedPacketInKeepAlive.load();
+        WrappedPacketInSettings.load();
+        WrappedPacketInUseEntity.load();
+        WrappedPacketInUpdateSign.load();
+        WrappedPacketInWindowClick.load();
+
+        //CLIENTBOUND
+        WrappedPacketOutAbilities.load();
+        WrappedPacketOutAnimation.load();
+        WrappedPacketOutChat.load();
+        WrappedPacketOutEntity.load();
+        WrappedPacketOutEntityVelocity.load();
+        WrappedPacketOutEntityTeleport.load();
+        WrappedPacketOutKeepAlive.load();
+        WrappedPacketOutKickDisconnect.load();
+        WrappedPacketOutPosition.load();
+        WrappedPacketOutTransaction.load();
+        WrappedPacketOutUpdateHealth.load();
+        WrappedPacketOutGameStateChange.load();
+        WrappedPacketOutCustomPayload.load();
+        WrappedPacketOutExplosion.load();
+        WrappedPacketOutEntityStatus.load();
+        WrappedPacketOutExperience.load();
+    }
+
+    protected void setup() {
+
+    }
+
+    @Override
+    public boolean readBoolean(int index) {
+        return (boolean) read(boolean.class, index);
+    }
+
+    @Override
+    public byte readByte(int index) {
+        return (byte) read(byte.class, index);
+    }
+
+    @Override
+    public short readShort(int index) {
+        return (short) read(short.class, index);
+    }
+
+    @Override
+    public int readInt(int index) {
+        return (int) read(int.class, index);
+    }
+
+    @Override
+    public long readLong(int index) {
+        return (long) read(long.class, index);
+    }
+
+    @Override
+    public float readFloat(int index) {
+        return (float) read(float.class, index);
+    }
+
+    @Override
+    public double readDouble(int index) {
+        return (double) read(double.class, index);
+    }
+
+    @Override
+    public boolean[] readBooleanArray(int index) {
+        Map<Class<?>, Field[]> cached = fieldCache.get(packetClass);
+        if (cached != null) {
+            try {
+                return (boolean[]) cached.get(boolean[].class)[index].get(packet);
+            } catch (IllegalAccessException e) {
+                e.printStackTrace();
+            }
+        }
+        int currentIndex = 0;
+        for (Field f : packetClass.getDeclaredFields()) {
+            f.setAccessible(true);
+            if (boolean[].class.isAssignableFrom(f.getType())) {
+                if (index == currentIndex++) {
+                    try {
+                        return (boolean[]) f.get(packet);
+                    } catch (IllegalAccessException e) {
+                        e.printStackTrace();
+                    }
+                }
+            }
+        }
+        throw new WrapperFieldNotFoundException(packetClass, boolean[].class, index);
+    }
+
+    @Override
+    public byte[] readByteArray(int index) {
+        Map<Class<?>, Field[]> cached = fieldCache.get(packetClass);
+        if (cached != null) {
+            try {
+                return (byte[]) cached.get(byte[].class)[index].get(packet);
+            } catch (IllegalAccessException e) {
+                e.printStackTrace();
+            }
+        }
+        int currentIndex = 0;
+        for (Field f : packetClass.getDeclaredFields()) {
+            f.setAccessible(true);
+            if (byte[].class.isAssignableFrom(f.getType())) {
+                if (index == currentIndex++) {
+                    try {
+                        return (byte[]) f.get(packet);
+                    } catch (IllegalAccessException e) {
+                        e.printStackTrace();
+                    }
+                }
+            }
+        }
+        throw new WrapperFieldNotFoundException(packetClass, byte[].class, index);
+    }
+
+    @Override
+    public short[] readShortArray(int index) {
+        Map<Class<?>, Field[]> cached = fieldCache.get(packetClass);
+        if (cached != null) {
+            try {
+                return (short[]) cached.get(short[].class)[index].get(packet);
+            } catch (IllegalAccessException e) {
+                e.printStackTrace();
+            }
+        }
+        int currentIndex = 0;
+        for (Field f : packetClass.getDeclaredFields()) {
+            f.setAccessible(true);
+            if (short[].class.isAssignableFrom(f.getType())) {
+                if (index == currentIndex++) {
+                    try {
+                        return (short[]) f.get(packet);
+                    } catch (IllegalAccessException e) {
+                        e.printStackTrace();
+                    }
+                }
+            }
+        }
+        throw new WrapperFieldNotFoundException(packetClass, short[].class, index);
+    }
+
+    @Override
+    public int[] readIntArray(int index) {
+        Map<Class<?>, Field[]> cached = fieldCache.get(packetClass);
+        if (cached != null) {
+            try {
+                return (int[]) cached.get(int[].class)[index].get(packet);
+            } catch (IllegalAccessException e) {
+                e.printStackTrace();
+            }
+        }
+        int currentIndex = 0;
+        for (Field f : packetClass.getDeclaredFields()) {
+            f.setAccessible(true);
+            if (int[].class.isAssignableFrom(f.getType())) {
+                if (index == currentIndex++) {
+                    try {
+                        return (int[]) f.get(packet);
+                    } catch (IllegalAccessException e) {
+                        e.printStackTrace();
+                    }
+                }
+            }
+        }
+        throw new WrapperFieldNotFoundException(packetClass, int[].class, index);
+    }
+
+    @Override
+    public long[] readLongArray(int index) {
+        Map<Class<?>, Field[]> cached = fieldCache.get(packetClass);
+        if (cached != null) {
+            try {
+                return (long[]) cached.get(long[].class)[index].get(packet);
+            } catch (IllegalAccessException e) {
+                e.printStackTrace();
+            }
+        }
+        int currentIndex = 0;
+        for (Field f : packetClass.getDeclaredFields()) {
+            f.setAccessible(true);
+            if (long[].class.isAssignableFrom(f.getType())) {
+                if (index == currentIndex++) {
+                    try {
+                        return (long[]) f.get(packet);
+                    } catch (IllegalAccessException e) {
+                        e.printStackTrace();
+                    }
+                }
+            }
+        }
+        throw new WrapperFieldNotFoundException(packetClass, long[].class, index);
+    }
+
+    @Override
+    public float[] readFloatArray(int index) {
+        Map<Class<?>, Field[]> cached = fieldCache.get(packetClass);
+        if (cached != null) {
+            try {
+                return (float[]) cached.get(float[].class)[index].get(packet);
+            } catch (IllegalAccessException e) {
+                e.printStackTrace();
+            }
+        }
+        int currentIndex = 0;
+        for (Field f : packetClass.getDeclaredFields()) {
+            f.setAccessible(true);
+            if (float.class.isAssignableFrom(f.getType())) {
+                if (index == currentIndex++) {
+                    try {
+                        return (float[]) f.get(packet);
+                    } catch (IllegalAccessException e) {
+                        e.printStackTrace();
+                    }
+                }
+            }
+        }
+        throw new WrapperFieldNotFoundException(packetClass, float[].class, index);
+    }
+
+    @Override
+    public double[] readDoubleArray(int index) {
+        Map<Class<?>, Field[]> cached = fieldCache.get(packetClass);
+        if (cached != null) {
+            try {
+                return (double[]) cached.get(double[].class)[index].get(packet);
+            } catch (IllegalAccessException e) {
+                e.printStackTrace();
+            }
+        }
+        int currentIndex = 0;
+        for (Field f : packetClass.getDeclaredFields()) {
+            f.setAccessible(true);
+            if (double[].class.isAssignableFrom(f.getType())) {
+                if (index == currentIndex++) {
+                    try {
+                        return (double[]) f.get(packet);
+                    } catch (IllegalAccessException e) {
+                        e.printStackTrace();
+                    }
+                }
+            }
+        }
+        throw new WrapperFieldNotFoundException(packetClass, double[].class, index);
+    }
+
+    @Override
+    public String[] readStringArray(int index) {
+        Map<Class<?>, Field[]> cached = fieldCache.get(packetClass);
+        if (cached != null) {
+            try {
+                Object[] array = (Object[]) cached.get(String[].class)[index].get(packet);
+                int len = array.length;
+                String[] stringArray = new String[len];
+                for (int i = 0; i < len; i++) {
+                    stringArray[i] = array[i].toString();
+                }
+                return stringArray;
+            } catch (IllegalAccessException e) {
+                e.printStackTrace();
+            }
+        }
+        throw new WrapperFieldNotFoundException(packetClass, String[].class, index);
+    }
+
+    @Override
+    public String readString(int index) {
+       return (String) read(String.class, index);
+    }
+
+    public Object readAnyObject(int index) {
+        try {
+            Field f = packetClass.getDeclaredFields()[index];
+            if (!f.isAccessible()) {
+                f.setAccessible(true);
+            }
+            try {
+                return f.get(packet);
+            } catch (IllegalAccessException e) {
+                e.printStackTrace();
+            }
+        } catch (ArrayIndexOutOfBoundsException e) {
+            throw new WrapperFieldNotFoundException("PacketEvents failed to find any field indexed " + index + " in the " + ClassUtil.getClassSimpleName(packetClass) + " class!");
+        }
+        return null;
+    }
+
+    public Object readObject(int index, Class<?> type) {
+        Map<Class<?>, Field[]> cached = fieldCache.get(packetClass);
+        if (cached != null) {
+            if (!cached.containsKey(type)) {
+                List<Field> typeFields = new ArrayList<>();
+                for (Field f : packetClass.getDeclaredFields()) {
+                    f.setAccessible(true);
+                    if (f.getType().equals(type)) {
+                        typeFields.add(f);
+                    }
+                }
+                if (!typeFields.isEmpty()) {
+                    cached.put(type, typeFields.toArray(new Field[0]));
+                }
+            }
+
+        }
+        try {
+            return cached.get(type)[index].get(packet);
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        }
+        throw new WrapperFieldNotFoundException(packetClass, type, index);
+    }
+
+    public Object[] readObjectArray(int index, Class<?> type) {
+        return (Object[]) readObject(index, type);
+    }
+
+    @Override
+    public void writeBoolean(int index, boolean value) {
+        write(boolean.class, index, value);
+    }
+
+    @Override
+    public void writeByte(int index, byte value) {
+        write(byte.class, index, value);
+    }
+
+    @Override
+    public void writeShort(int index, short value) {
+        write(short.class, index, value);
+    }
+
+    @Override
+    public void writeInt(int index, int value) {
+        write(int.class, index, value);
+    }
+
+    @Override
+    public void writeLong(int index, long value) {
+        write(long.class, index, value);
+    }
+
+    @Override
+    public void writeFloat(int index, float value) {
+        write(float.class, index, value);
+    }
+
+    @Override
+    public void writeDouble(int index, double value) {
+        write(double.class, index, value);
+    }
+
+    @Override
+    public void writeString(int index, String value) {
+        write(String.class, index, value);
+    }
+
+    private void write(Class<?> type, int index, Object value) throws WrapperFieldNotFoundException {
+        Field field = getField(type, index);
+        if(field == null) {
+            throw new WrapperFieldNotFoundException(packetClass, type, index);
+        }
+        try {
+            field.set(packet, value);
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private Object read(Class<?> type, int index) throws WrapperFieldNotFoundException {
+        Field field = getField(type, index);
+        if(field == null) {
+            throw new WrapperFieldNotFoundException(packetClass, type, index);
+        }
+        try {
+            return field.get(packet);
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    private Field getField(Class<?> type, int index) {
+        Map<Class<?>, Field[]> cached = fieldCache.get(packetClass);
+        if (cached == null) {
+            return null;
+        }
+        Field[] fields = cached.get(type);
+        if (fields != null) {
+            return fields[index];
+        }
+        return null;
+    }
+
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/WrapperPacketReader.java

@@ -0,0 +1,66 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers;
+
+public interface WrapperPacketReader {
+
+    boolean readBoolean(int index);
+
+    byte readByte(int index);
+
+    short readShort(int index);
+
+    int readInt(int index);
+
+    long readLong(int index);
+
+    float readFloat(int index);
+
+    double readDouble(int index);
+
+    boolean[] readBooleanArray(int index);
+
+    byte[] readByteArray(int index);
+
+    short[] readShortArray(int index);
+
+    int[] readIntArray(int index);
+
+    long[] readLongArray(int index);
+
+    float[] readFloatArray(int index);
+
+    double[] readDoubleArray(int index);
+
+    String[] readStringArray(int index);
+
+    String readString(int index);
+
+    Object readObject(int index, Class<?> type);
+
+    Object readAnyObject(int index);
+
+    Object[] readObjectArray(int index, Class<?> type);
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/WrapperPacketWriter.java

@@ -0,0 +1,45 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers;
+
+public interface WrapperPacketWriter {
+
+    //TODO write for the arrays
+    void writeBoolean(int index, boolean value);
+
+    void writeByte(int index, byte value);
+
+    void writeShort(int index, short value);
+
+    void writeInt(int index, int value);
+
+    void writeLong(int index, long value);
+
+    void writeFloat(int index, float value);
+
+    void writeDouble(int index, double value);
+
+    void writeString(int index, String value);
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/api/WrappedPacket.java

@@ -1,43 +0,0 @@
-package io.github.retrooper.packetevents.packetwrappers.api;
-
-import io.github.retrooper.packetevents.enums.ServerVersion;
-import org.bukkit.entity.Player;
-
-public class WrappedPacket {
-    protected static ServerVersion version = ServerVersion.getVersion();
-    protected final Player player;
-    protected Object packet;
-
-    public WrappedPacket() {
-        this.player= null;
-        this.packet = null;
-    }
-
-    public WrappedPacket(final Object packet) {
-        this.player = null;
-        if (packet == null) return;
-        this.packet = packet;
-        try {
-            setup();
-        } catch (final Exception e) {
-            e.printStackTrace();
-        }
-    }
-
-    public WrappedPacket(final Player player, final Object packet) {
-        this.player = player;
-        if (packet == null) return;
-        this.packet = packet;
-        try {
-            setup();
-        } catch (final Exception e) {
-            e.printStackTrace();
-        }
-    }
-
-
-    protected void setup() {
-
-    }
-
-}

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/abilities/WrappedPacketInAbilities.java

@@ -1,67 +1,97 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.in.abilities;
 
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.annotations.NotNull;
+import io.github.retrooper.packetevents.annotations.Nullable;
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.reflection.Reflection;
 
 public final class WrappedPacketInAbilities extends WrappedPacket {
-    private static Class<?> abilitiesClass;
-
-    static {
-
-        try {
-            abilitiesClass = NMSUtils.getNMSClass("PacketPlayInAbilities");
-        } catch (ClassNotFoundException e) {
-            e.printStackTrace();
-        }
-    }
-
-    private boolean isVulnerable;
-    private boolean isFlying;
-    private boolean allowFly;
-    private boolean instantBuild;
-    private float flySpeed;
-    private float walkSpeed;
 
     public WrappedPacketInAbilities(Object packet) {
         super(packet);
     }
-
-    @Override
-    protected void setup() {
-        try {
-            this.isVulnerable = Reflection.getField(abilitiesClass, boolean.class, 0).getBoolean(packet);
-            this.isFlying = Reflection.getField(abilitiesClass, boolean.class, 1).getBoolean(packet);
-            this.allowFly = Reflection.getField(abilitiesClass, boolean.class, 2).getBoolean(packet);
-            this.instantBuild = Reflection.getField(abilitiesClass, boolean.class, 3).getBoolean(packet);
-            this.flySpeed = Reflection.getField(abilitiesClass, float.class, 0).getFloat(packet);
-            this.walkSpeed = Reflection.getField(abilitiesClass, float.class, 1).getFloat(packet);
-        } catch (IllegalAccessException e) {
-            e.printStackTrace();
-        }
-    }
-
+    /**
+     * This will return null if the server version is not available in 1.16.x and above
+     *
+     * @return Whether the player is vulnerable to damage or not.
+     */
+    @Deprecated
+    @Nullable
     public boolean isVulnerable() {
-        return isVulnerable;
+        return readBoolean(0);
     }
 
+    @NotNull
     public boolean isFlying() {
-        return isFlying;
+        return readBoolean(1);
     }
 
+    /**
+     * This will return null if the server version is not available in 1.16.x and above
+     *
+     * @return Whether or not the player can fly.
+     */
+    @Deprecated
+    @Nullable
     public boolean isFlightAllowed() {
-        return allowFly;
+        return readBoolean(2);
     }
 
+    /**
+     * This will return null if the server version is not available in 1.16.x and above
+     *
+     * @return Whether or not the player can break blocks instantly.
+     */
+    @Deprecated
+    @Nullable
     public boolean canInstantlyBuild() {
-        return instantBuild;
+        return readBoolean(3);
     }
 
+    /**
+     * This will return null if the server version is not available in 1.16.x and above
+     *
+     * @return The speed at which the player can fly, as a float.
+     */
+    @Deprecated
+    @Nullable
     public float getFlySpeed() {
-        return flySpeed;
+        return readFloat(0);
     }
 
+    /**
+     * This will return null if the server version is not available in 1.16.x and above
+     *
+     * @return The speed at which the player can walk, as a float.
+     */
+    @Deprecated
+    @Nullable
     public float getWalkSpeed() {
-        return walkSpeed;
+        return readFloat(1);
     }
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/armanimation/WrappedPacketInArmAnimation.java

@@ -1,35 +0,0 @@
-package io.github.retrooper.packetevents.packetwrappers.in.armanimation;
-
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.utils.NMSUtils;
-
-//TODO: Test on 1.9, 1.11, 1.13, 1.14
-public final class WrappedPacketInArmAnimation extends WrappedPacket {
-    private static Class<?> packetClass;
-
-    static {
-        try {
-            packetClass = NMSUtils.getNMSClass("PacketPlayInArmAnimation");
-        } catch (Exception e) {
-            e.printStackTrace();
-        }
-    }
-
-    private long timeStamp;
-
-    public WrappedPacketInArmAnimation(Object packet) {
-        super(packet);
-    }
-
-    @Override
-    public void setup() {
-        //Lazy way, do you really need to get the timestamp in the actual class? Edit by Retrooper: Yes lol
-        //TODO: Get EnumHand value sent in 1.9+, however not really necessary
-        timeStamp = System.currentTimeMillis();
-    }
-
-    public long getTimestamp() {
-        return timeStamp;
-    }
-
-}

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/blockdig/WrappedPacketInBlockDig.java

@@ -1,20 +1,48 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.in.blockdig;
 
 import io.github.retrooper.packetevents.enums.Direction;
-import io.github.retrooper.packetevents.enums.ServerVersion;
-import io.github.retrooper.packetevents.enums.minecraft.PlayerDigType;
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
-import io.github.retrooper.packetevents.utils.vector.Vector3i;
+import io.github.retrooper.packetevents.utils.server.ServerVersion;
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.reflection.Reflection;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.github.retrooper.packetevents.utils.reflection.SubclassUtil;
 
 public final class WrappedPacketInBlockDig extends WrappedPacket {
     private static Class<?> blockDigClass, blockPositionClass, enumDirectionClass, digTypeClass;
+    private static boolean isVersionLowerThan_v_1_8;
+    private Object blockPosObj, enumDirObj, digTypeObj;
+    public WrappedPacketInBlockDig(Object packet) {
+        super(packet);
+    }
 
-    static {
-
+    public static void load() {
+        blockDigClass = PacketTypeClasses.Client.BLOCK_DIG;
         try {
-            blockDigClass = NMSUtils.getNMSClass("PacketPlayInBlockDig");
             if (version.isHigherThan(ServerVersion.v_1_7_10)) {
                 blockPositionClass = NMSUtils.getNMSClass("BlockPosition");
                 enumDirectionClass = NMSUtils.getNMSClass("EnumDirection");
@@ -22,75 +50,108 @@ public final class WrappedPacketInBlockDig extends WrappedPacket {
         } catch (ClassNotFoundException e) {
             e.printStackTrace();
         }
+        isVersionLowerThan_v_1_8 = version.isLowerThan(ServerVersion.v_1_8);
 
-        if (version.isHigherThan(ServerVersion.v_1_7_10)) {
+        if (version != ServerVersion.v_1_7_10) {
             try {
                 digTypeClass = NMSUtils.getNMSClass("EnumPlayerDigType");
             } catch (ClassNotFoundException e) {
                 //It is probably a subclass
-                digTypeClass = Reflection.getSubClass(blockDigClass, "EnumPlayerDigType");
+                digTypeClass = SubclassUtil.getSubClass(blockDigClass, "EnumPlayerDigType");
             }
         }
     }
 
-    private Vector3i blockPosition;
-    private Direction direction;
-    private PlayerDigType digType;
-
-    public WrappedPacketInBlockDig(Object packet) {
-        super(packet);
-    }
-
-    @Override
-    protected void setup() {
-        Direction enumDirection = null;
-        PlayerDigType enumDigType = null;
-        int x = 0, y = 0, z = 0;
-        //1.7.10
-        try {
-            if (version.isLowerThan(ServerVersion.v_1_8)) {
-                enumDigType = PlayerDigType.get(Reflection.getField(blockDigClass, int.class, 4).getInt(packet));
-                x = Reflection.getField(blockDigClass, int.class, 0).getInt(packet);
-                y = Reflection.getField(blockDigClass, int.class, 1).getInt(packet);
-                z = Reflection.getField(blockDigClass, int.class, 2).getInt(packet);
-                enumDirection = null;
-            } else {
-                //1.8+
-                final Object blockPosObj = Reflection.getField(blockDigClass, blockPositionClass, 0).get(packet);
-                final Object enumDirectionObj = Reflection.getField(blockDigClass, enumDirectionClass, 0).get(packet);
-                final Object digTypeObj = Reflection.getField(blockDigClass, digTypeClass, 0).get(packet);
-
-                Class<?> blockPosSuper = blockPositionClass;
-                x = Reflection.getField(blockPosSuper, int.class, 0).getInt(blockPosObj);
-                y = Reflection.getField(blockPosSuper, int.class, 1).getInt(blockPosObj);
-                z = Reflection.getField(blockPosSuper, int.class, 2).getInt(blockPosObj);
-
-                enumDirection = Direction.valueOf(((Enum) enumDirectionObj).name());
-                enumDigType = PlayerDigType.valueOf(((Enum) digTypeObj).name());
+    /**
+     * Get X position of the block
+     * @return Block Position X
+     */
+    public int getX() {
+        if(isVersionLowerThan_v_1_8) {
+            return readInt(0);
+        }
+        else {
+            if(blockPosObj == null) {
+                blockPosObj = readObject(0, blockPositionClass);
             }
-        } catch (IllegalAccessException e) {
-            e.printStackTrace();
+            WrappedPacket blockPosWrapper = new WrappedPacket(blockPosObj);
+            return blockPosWrapper.readInt(0);
         }
-        this.blockPosition = new Vector3i(x, y, z);
-        if (enumDirection == null) {
-            this.direction = Direction.NULL;
-        } else {
-            this.direction = enumDirection;
-        }
-        this.digType = enumDigType;
     }
 
-    public Vector3i getBlockPosition() {
-        return blockPosition;
+    /**
+     * Get Y position of the block
+     * @return Block Position Y
+     */
+    public int getY() {
+        if(isVersionLowerThan_v_1_8) {
+            return readInt(1);
+        }
+        else {
+            if(blockPosObj == null) {
+                blockPosObj = readObject(0, blockPositionClass);
+            }
+            WrappedPacket blockPosWrapper = new WrappedPacket(blockPosObj);
+            return blockPosWrapper.readInt(1);
+        }
     }
 
+    /**
+     * Get Z position of the block
+     * @return Block Position Z
+     */
+    public int getZ() {
+        if(isVersionLowerThan_v_1_8) {
+            return readInt(2);
+        }
+        else {
+            if(blockPosObj == null) {
+                blockPosObj = readObject(0, blockPositionClass);
+            }
+            WrappedPacket blockPosWrapper = new WrappedPacket(blockPosObj);
+            return blockPosWrapper.readInt(2);
+        }
+    }
+
+    /**
+     * Get the direction
+     * Is Direction.NULL on 1.7.10 FOR NOW
+     * @return Direction
+     */
     public Direction getDirection() {
-        return direction;
+        if(isVersionLowerThan_v_1_8) {
+            return Direction.NULL;
+        }
+        else {
+            if(enumDirObj == null) {
+                enumDirObj = readObject(0, enumDirectionClass);
+            }
+            return Direction.valueOf(((Enum)enumDirObj).name());
+        }
     }
 
+    /**
+     * Get the PlayerDigType enum sent in this packet.
+     * @return Dig Type
+     */
     public PlayerDigType getDigType() {
-        return digType;
+        if(isVersionLowerThan_v_1_8) {
+            return PlayerDigType.values()[readInt(4)];
+        }
+        else {
+            return PlayerDigType.valueOf(((Enum)readObject(0, digTypeClass)).name());
+        }
     }
 
-
+    public enum PlayerDigType {
+        START_DESTROY_BLOCK,
+        ABORT_DESTROY_BLOCK,
+        STOP_DESTROY_BLOCK,
+        DROP_ALL_ITEMS,
+        DROP_ITEM,
+        RELEASE_USE_ITEM,
+        SWAP_HELD_ITEMS,
+        SWAP_ITEM_WITH_OFFHAND,
+        WRONG_PACKET
+    }
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/blockplace/WrappedPacketInBlockPlace.java

@@ -1,64 +1,138 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.in.blockplace;
 
-import io.github.retrooper.packetevents.enums.ServerVersion;
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.utils.vector.Vector3i;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.server.ServerVersion;
 import org.bukkit.block.Block;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 
 
 public final class WrappedPacketInBlockPlace extends WrappedPacket {
-    static {
-        if (version.isHigherThan(ServerVersion.v_1_7_10)) {
-            WrappedPacketInBlockPlace_1_8.initStatic();
-        }
-    }
-
-    private Vector3i blockPosition;
-    private ItemStack itemStack;
+    private static boolean isHigherThan_v_1_8_8, isHigherThan_v_1_7_10;
+    private WrappedPacket cachedWrappedPacket;
 
     public WrappedPacketInBlockPlace(final Player player, final Object packet) {
         super(player, packet);
     }
 
-    @Override
-    protected void setup() {
-        //1.7.10
-        Vector3i position = null;
-        ItemStack itemStack = null;
-        try {
-            if (version.isHigherThan(ServerVersion.v_1_8_8)) {
-                final WrappedPacketInBlockPlace_1_9 blockPlace_1_9 = new WrappedPacketInBlockPlace_1_9(getPlayer(), packet);
-                final Block block = blockPlace_1_9.getBlock();
-                position = new Vector3i(block.getX(), block.getY(), block.getZ());
-                itemStack = new ItemStack(block.getType());
-            } else if (version.isHigherThan(ServerVersion.v_1_7_10)) {
-                final WrappedPacketInBlockPlace_1_8 blockPlace_1_8 = new WrappedPacketInBlockPlace_1_8(packet);
-                position = blockPlace_1_8.getBlockPosition();
-                itemStack = blockPlace_1_8.getItemStack();
-            } else {
-                final WrappedPacketInBlockPlace_1_7_10 blockPlace_1_7_10 = new WrappedPacketInBlockPlace_1_7_10(getPlayer(), packet);
-                position = blockPlace_1_7_10.getBlockPosition();
-                this.itemStack = blockPlace_1_7_10.getItemStack();
-            }
-        } catch (IllegalArgumentException e) {
-            e.printStackTrace();
+    public static void load() {
+        isHigherThan_v_1_8_8 = version.isHigherThan(ServerVersion.v_1_8_8);
+        isHigherThan_v_1_7_10 = version.isHigherThan(ServerVersion.v_1_7_10);
+        if (isHigherThan_v_1_7_10) {
+            WrappedPacketInBlockPlace_1_8.load();
         }
-        this.blockPosition = position;
-        this.itemStack = itemStack;
     }
 
     public Player getPlayer() {
-        return this.player;
+        return player;
     }
 
-    public Vector3i getBlockPosition() {
-        return blockPosition;
+    public int getX() {
+        if (isHigherThan_v_1_8_8) {
+            if (cachedWrappedPacket == null) {
+                WrappedPacketInBlockPlace_1_9 blockPlace_1_9 = new WrappedPacketInBlockPlace_1_9(getPlayer(), packet);
+                cachedWrappedPacket = blockPlace_1_9;
+                return blockPlace_1_9.getBlock().getX();
+            }
+            return ((WrappedPacketInBlockPlace_1_9)cachedWrappedPacket).getBlock().getX();
+        } else if (isHigherThan_v_1_7_10) {
+           if(cachedWrappedPacket == null) {
+               WrappedPacketInBlockPlace_1_8 blockPlace_1_8 = new WrappedPacketInBlockPlace_1_8(packet);
+               cachedWrappedPacket = blockPlace_1_8;
+               return blockPlace_1_8.getX();
+           }
+        } else {
+            WrappedPacketInBlockPlace_1_7_10 blockPlace_1_7_10 = new WrappedPacketInBlockPlace_1_7_10(packet);
+            return blockPlace_1_7_10.x;
+        }
+        return 0;
+    }
+
+    public int getY() {
+        if (isHigherThan_v_1_8_8) {
+            if (cachedWrappedPacket == null) {
+                WrappedPacketInBlockPlace_1_9 blockPlace_1_9 = new WrappedPacketInBlockPlace_1_9(getPlayer(), packet);
+                cachedWrappedPacket = blockPlace_1_9;
+                return blockPlace_1_9.getBlock().getY();
+            }
+            return ((WrappedPacketInBlockPlace_1_9)cachedWrappedPacket).getBlock().getX();
+        } else if (isHigherThan_v_1_7_10) {
+            if(cachedWrappedPacket == null) {
+                WrappedPacketInBlockPlace_1_8 blockPlace_1_8 = new WrappedPacketInBlockPlace_1_8(packet);
+                cachedWrappedPacket = blockPlace_1_8;
+                return blockPlace_1_8.getY();
+            }
+        } else {
+            WrappedPacketInBlockPlace_1_7_10 blockPlace_1_7_10 = new WrappedPacketInBlockPlace_1_7_10(packet);
+            return blockPlace_1_7_10.y;
+        }
+        return 0;
+    }
+
+    public int getZ() {
+        if (isHigherThan_v_1_8_8) {
+            if (cachedWrappedPacket == null) {
+                WrappedPacketInBlockPlace_1_9 blockPlace_1_9 = new WrappedPacketInBlockPlace_1_9(getPlayer(), packet);
+                cachedWrappedPacket = blockPlace_1_9;
+                return blockPlace_1_9.getBlock().getZ();
+            }
+            return ((WrappedPacketInBlockPlace_1_9)cachedWrappedPacket).getBlock().getX();
+        } else if (isHigherThan_v_1_7_10) {
+            if(cachedWrappedPacket == null) {
+                WrappedPacketInBlockPlace_1_8 blockPlace_1_8 = new WrappedPacketInBlockPlace_1_8(packet);
+                cachedWrappedPacket = blockPlace_1_8;
+                return blockPlace_1_8.getZ();
+            }
+        } else {
+            WrappedPacketInBlockPlace_1_7_10 blockPlace_1_7_10 = new WrappedPacketInBlockPlace_1_7_10(packet);
+            return blockPlace_1_7_10.z;
+        }
+        return 0;
     }
 
     public ItemStack getItemStack() {
-        return itemStack;
+        if (isHigherThan_v_1_8_8) {
+            if (cachedWrappedPacket == null) {
+                WrappedPacketInBlockPlace_1_9 blockPlace_1_9 = new WrappedPacketInBlockPlace_1_9(getPlayer(), packet);
+                cachedWrappedPacket = blockPlace_1_9;
+                return new ItemStack(blockPlace_1_9.getBlock().getType());
+            }
+            return new ItemStack(((WrappedPacketInBlockPlace_1_9)cachedWrappedPacket).getBlock().getType());
+        } else if (isHigherThan_v_1_7_10) {
+            if(cachedWrappedPacket == null) {
+                WrappedPacketInBlockPlace_1_8 blockPlace_1_8 = new WrappedPacketInBlockPlace_1_8(packet);
+                cachedWrappedPacket = blockPlace_1_8;
+                return blockPlace_1_8.getItemStack();
+            }
+        } else {
+            WrappedPacketInBlockPlace_1_7_10 blockPlace_1_7_10 = new WrappedPacketInBlockPlace_1_7_10(packet);
+            return blockPlace_1_7_10.itemStack;
+        }
+        return null;
     }
 
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/blockplace/WrappedPacketInBlockPlace_1_7_10.java

@@ -1,18 +1,41 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.in.blockplace;
 
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.utils.vector.Vector3i;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
 import net.minecraft.server.v1_7_R4.PacketPlayInBlockPlace;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 
 final class WrappedPacketInBlockPlace_1_7_10 extends WrappedPacket {
-    private Vector3i blockPosition;
-    private ItemStack itemStack;
-    private int blockFace;
+    public int x, y, z;
+    public ItemStack itemStack;
+    public int blockFace;
 
-    WrappedPacketInBlockPlace_1_7_10(final Player player, final Object packet) {
-        super(player, packet);
+    WrappedPacketInBlockPlace_1_7_10(final Object packet) {
+        super(packet);
     }
 
 
@@ -20,23 +43,13 @@ final class WrappedPacketInBlockPlace_1_7_10 extends WrappedPacket {
     protected void setup() {
         final PacketPlayInBlockPlace blockPlace = (PacketPlayInBlockPlace) packet;
 
-        this.blockPosition = new Vector3i(blockPlace.c(), blockPlace.d(), blockPlace.e());
+        x = blockPlace.c();
+        y = blockPlace.d();
+        z = blockPlace.e();
 
         this.blockFace = blockPlace.d();
 
         net.minecraft.server.v1_7_R4.ItemStack stack = blockPlace.getItemStack();
         this.itemStack = org.bukkit.craftbukkit.v1_7_R4.inventory.CraftItemStack.asBukkitCopy(stack);
     }
-
-    public Vector3i getBlockPosition() {
-        return blockPosition;
-    }
-
-    public ItemStack getItemStack() {
-        return itemStack;
-    }
-
-    public int getBlockFace() {
-        return blockFace;
-    }
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/blockplace/WrappedPacketInBlockPlace_1_8.java

@@ -1,56 +1,93 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.in.blockplace;
 
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
-import io.github.retrooper.packetevents.utils.vector.Vector3i;
+import io.github.retrooper.packetevents.exceptions.WrapperFieldNotFoundException;
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.github.retrooper.packetevents.utils.reflection.Reflection;
 import org.bukkit.inventory.ItemStack;
 
 import java.lang.reflect.InvocationTargetException;
 
 final class WrappedPacketInBlockPlace_1_8 extends WrappedPacket {
-    private static Class<?> blockPlaceClass, blockPositionClass;
-    private Vector3i blockPosition;
-    private ItemStack itemStack;
+    private static Class<?> blockPlaceClass, blockPositionClass, blockPositionSuperClass;
+    private Object blockPosObj;
 
     WrappedPacketInBlockPlace_1_8(final Object packet) {
         super(packet);
     }
 
-    protected static void initStatic() {
+    protected static void load() {
+        blockPlaceClass = PacketTypeClasses.Client.BLOCK_PLACE;
         try {
-            blockPlaceClass = NMSUtils.getNMSClass("PacketPlayInBlockPlace");
-
             blockPositionClass = NMSUtils.getNMSClass("BlockPosition");
         } catch (ClassNotFoundException e) {
             e.printStackTrace();
         }
+        blockPositionSuperClass = blockPositionClass.getSuperclass();
     }
 
-    @Override
-    protected void setup() {
+    public int getX() {
+        if(blockPosObj == null) {
+            blockPosObj = new WrappedPacket(packet).readObject(0, blockPositionClass);
+        }
         try {
-            Object nmsBlockPos = Reflection.getField(blockPlaceClass, blockPositionClass, 1).get(packet);
-
-            final int[] coords = new int[3];
-            for (int i = 0; i < 3; i++) {
-                final String s = "get" + (i == 0 ? "X" : i == 1 ? "Y" : "Z");
-                coords[i] = (int) Reflection.getMethod(blockPositionClass.getSuperclass(), s, 0).invoke(nmsBlockPos);
-            }
-
-            this.blockPosition = new Vector3i(coords[0], coords[1], coords[2]);
-
-            this.itemStack = NMSUtils.toBukkitItemStack(Reflection.getField(blockPlaceClass, NMSUtils.nmsItemStackClass, 0).get(packet));
+            return (int)Reflection.getMethod(blockPositionSuperClass, "getX", 0).invoke(blockPosObj);
         } catch (IllegalAccessException | InvocationTargetException e) {
             e.printStackTrace();
         }
+        return 0;
     }
 
-    public Vector3i getBlockPosition() {
-        return blockPosition;
+    public int getY() {
+        if(blockPosObj == null) {
+            blockPosObj = new WrappedPacket(packet).readObject(0, blockPositionClass);
+        }
+        try {
+            return (int)Reflection.getMethod(blockPositionSuperClass, "getY", 0).invoke(blockPosObj);
+        } catch (IllegalAccessException | InvocationTargetException e) {
+            e.printStackTrace();
+        }
+        return 0;
+    }
+
+    public int getZ() {
+        if(blockPosObj == null) {
+            blockPosObj = new WrappedPacket(packet).readObject(0, blockPositionClass);
+        }
+        try {
+            return (int)Reflection.getMethod(blockPositionSuperClass, "getZ", 0).invoke(blockPosObj);
+        } catch (IllegalAccessException | InvocationTargetException e) {
+            e.printStackTrace();
+        }
+        return 0;
     }
 
     public ItemStack getItemStack() {
-        return itemStack;
+        return NMSUtils.toBukkitItemStack(readObject(0, NMSUtils.nmsItemStackClass));
     }
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/blockplace/WrappedPacketInBlockPlace_1_9.java

@@ -1,31 +1,45 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.in.blockplace;
 
 
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
 import io.github.retrooper.packetevents.utils.BlockIteratorUtils;
 import org.bukkit.block.Block;
 import org.bukkit.entity.Player;
 
 final class WrappedPacketInBlockPlace_1_9 extends WrappedPacket {
-    private Block block;
-
     public WrappedPacketInBlockPlace_1_9(final Player player, final Object packet) {
         super(player, packet);
     }
 
-
-    @Override
-    protected void setup() {
-        this.block = BlockIteratorUtils.getBlockLookingAt(getPlayer(), 3);
-    }
-
     public Player getPlayer() {
         return this.player;
     }
 
     public Block getBlock() {
-        return block;
+        return BlockIteratorUtils.getBlockLookingAt(getPlayer(),3);
     }
-
-
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/chat/WrappedPacketInChat.java

@@ -1,38 +1,42 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.in.chat;
 
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
 
 public final class WrappedPacketInChat extends WrappedPacket {
-    private static Class<?> chatPacketClass;
-
-    static {
-        try {
-            chatPacketClass = NMSUtils.getNMSClass("PacketPlayInChat");
-        } catch (ClassNotFoundException e) {
-            e.printStackTrace();
-        }
-    }
-
-    private String message;
-
     public WrappedPacketInChat(Object packet) {
         super(packet);
     }
 
-
-    @Override
-    protected void setup() {
-        try {
-            final Object obj = Reflection.getField(chatPacketClass, String.class, 0).get(packet);
-            this.message = obj.toString();
-        } catch (IllegalAccessException e) {
-            e.printStackTrace();
-        }
-    }
-
+    /**
+     * Get the message.
+     *
+     * @return Chat Message
+     */
     public String getMessage() {
-        return message;
+        return readString(0);
     }
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/clientcommand/WrappedPacketInClientCommand.java

@@ -1,58 +1,69 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.in.clientcommand;
 
-import io.github.retrooper.packetevents.annotations.Nullable;
-import io.github.retrooper.packetevents.enums.ServerVersion;
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.github.retrooper.packetevents.utils.reflection.SubclassUtil;
 
-//TODO: Test on 1.9, 1.10, 1.11, 1.13, 1.14
 public final class WrappedPacketInClientCommand extends WrappedPacket {
-    private static Class<?> packetClass;
-    @Nullable
     private static Class<?> enumClientCommandClass;
-
-    static {
-        try {
-            packetClass = NMSUtils.getNMSClass("PacketPlayInClientCommand");
-            if (version.isHigherThan(ServerVersion.v_1_7_10)) {
-                enumClientCommandClass = Reflection.getSubClass(packetClass, "EnumClientCommand");
-            } else {
-                enumClientCommandClass = NMSUtils.getNMSClass("EnumClientCommand");
-            }
-        } catch (Exception e) {
-            e.printStackTrace();
-        }
-    }
-
-    private ClientCommand clientCommand;
+    private Object enumObj;
 
     public WrappedPacketInClientCommand(Object packet) {
         super(packet);
     }
 
-    @Override
-    public void setup() {
+    public static void load() {
+        Class<?> packetClass = PacketTypeClasses.Client.CLIENT_COMMAND;
+
         try {
-            if (version.isLowerThan(ServerVersion.v_1_8)) {
-                clientCommand = ClientCommand.values()[(Reflection.getField(enumClientCommandClass, int.class, 1).getInt(packet))];
-            } else {
-                final Object enumObj = Reflection.getField(packetClass, enumClientCommandClass, 0).get(packet);
-                this.clientCommand = ClientCommand.valueOf(enumObj.toString());
-            }
-        } catch (Exception e) {
-            e.printStackTrace();
+            enumClientCommandClass = NMSUtils.getNMSClass("EnumClientCommand");
+        } catch (ClassNotFoundException e) {
+            //Probably a subclass
+            enumClientCommandClass = SubclassUtil.getSubClass(packetClass, "EnumClientCommand");
         }
     }
 
+    /**
+     * Get the Client Command enum sent in the packet
+     *
+     * @return ClientCommand
+     */
     public ClientCommand getClientCommand() {
-        return clientCommand;
+        if(enumObj == null) {
+            enumObj = readObject(0, enumClientCommandClass);
+        }
+        return ClientCommand.valueOf(enumObj.toString());
     }
 
     public enum ClientCommand {
         PERFORM_RESPAWN,
         REQUEST_STATS,
-        OPEN_INVENTORY_ACHIEVEMENT;
+        OPEN_INVENTORY_ACHIEVEMENT
     }
 
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/custompayload/WrappedPacketInCustomPayload.java

@@ -1,62 +1,82 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.in.custompayload;
 
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.bytebuf.ByteBufUtil;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.github.retrooper.packetevents.utils.reflection.Reflection;
 
 public final class WrappedPacketInCustomPayload extends WrappedPacket {
-    private static Class<?> packetClass, nmsMinecraftKey, nmsPacketDataSerializer;
+    private static Class<?> nmsMinecraftKey, packetDataSerializerClass, byteBufClass;
 
-    static {
-        try {
-            packetClass = NMSUtils.getNMSClass("PacketPlayInCustomPayload");
-            nmsPacketDataSerializer = NMSUtils.getNMSClass("PacketDataSerializer");
-        } catch (Exception e) {
-            e.printStackTrace();
-        }
-        try {
-            //Only on 1.13+
-            nmsMinecraftKey = NMSUtils.getNMSClass("MinecraftKey");
-        } catch (Exception e) {
-            //Its okay, this means they are on versions 1.7.10 ~ 1.12.2
-        }
-    }
-
-    private String data;
-    private Object minecraftKey, dataSerializer;
+    private static boolean strPresent, byteArrayPresent;
 
     public WrappedPacketInCustomPayload(Object packet) {
         super(packet);
     }
 
-    @Override
-    public void setup() {
-        if (Reflection.getField(packetClass, String.class, 0) == null) {
-            try {
-                this.minecraftKey = Reflection.getField(packetClass, nmsMinecraftKey, 0).get(packet);
-                this.dataSerializer = Reflection.getField(packetClass, nmsPacketDataSerializer, 0).get(packet);
-            } catch (Exception e) {
-                e.printStackTrace();
-            }
-        } else {
-            try {
-                this.data = (String) Reflection.getField(packetClass, String.class, 0).get(packet);
-                this.dataSerializer = Reflection.getField(packetClass, nmsPacketDataSerializer, 0).get(packet);
-            } catch (Exception e) {
-//intentionally empty, allegedly 1.7.10 produces a NPE?
-            }
+    public static void load() {
+        Class<?> packetClass = PacketTypeClasses.Client.CUSTOM_PAYLOAD;
+        strPresent = Reflection.getField(packetClass, String.class, 0) != null;
+        byteArrayPresent = Reflection.getField(packetClass, byte[].class, 0) != null;
+        packetDataSerializerClass = NMSUtils.getNMSClassWithoutException("PacketDataSerializer");
+        try {
+            byteBufClass = NMSUtils.getNettyClass("buffer.ByteBuf");
+        } catch (ClassNotFoundException e) {
+
+        }
+        try {
+            //Only on 1.13+
+            nmsMinecraftKey = NMSUtils.getNMSClass("MinecraftKey");
+        } catch (ClassNotFoundException e) {
+            //Its okay, this means they are on versions 1.7.10 - 1.12.2
         }
     }
 
-    public String getData() {
-        return data;
+    public String getTag() {
+        if (strPresent) {
+            return readString(0);
+        } else {
+            Object minecraftKey = readObject(0, nmsMinecraftKey);
+            WrappedPacket minecraftKeyWrapper = new WrappedPacket(minecraftKey);
+            return minecraftKeyWrapper.readString(1);
+        }
     }
 
-    public Object getMinecraftKey() {
-        return minecraftKey;
-    }
+    public byte[] getData() {
+        if (byteArrayPresent) {
+            return readByteArray(0);
+        } else {
+            Object dataSerializer = readObject(0, packetDataSerializerClass);
+            WrappedPacket byteBufWrapper = new WrappedPacket(dataSerializer);
 
-    public Object getDataSerializer() {
-        return dataSerializer;
+            Object byteBuf = byteBufWrapper.readObject(0, byteBufClass);
+
+            return ByteBufUtil.getBytes(byteBuf);
+        }
     }
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/entityaction/WrappedPacketInEntityAction.java

@@ -1,91 +1,141 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.in.entityaction;
 
 import io.github.retrooper.packetevents.annotations.Nullable;
-import io.github.retrooper.packetevents.enums.ServerVersion;
-import io.github.retrooper.packetevents.enums.minecraft.PlayerAction;
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.utils.server.ServerVersion;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.github.retrooper.packetevents.utils.reflection.SubclassUtil;
 import org.bukkit.entity.Entity;
 
+import java.util.HashMap;
+
 public final class WrappedPacketInEntityAction extends WrappedPacket {
-    private static Class<?> entityActionClass;
+    private static final HashMap<String, PlayerAction> cachedPlayerActionNames = new HashMap<String, PlayerAction>();
+    private static final HashMap<Integer, PlayerAction> cachedPlayerActionIDs = new HashMap<Integer, PlayerAction>();
     @Nullable
     private static Class<?> enumPlayerActionClass;
-
-    static {
-        try {
-            entityActionClass = NMSUtils.getNMSClass("PacketPlayInEntityAction");
-            if (version.isHigherThan(ServerVersion.v_1_7_10)) {
-                enumPlayerActionClass = Reflection.getSubClass(entityActionClass, "EnumPlayerAction");
-            }
-        } catch (ClassNotFoundException e) {
-            e.printStackTrace();
-        }
-    }
-
+    private static boolean isLowerThan_v_1_8;
     private Entity entity;
-    private int entityId;
+    private int entityId = -1;
     private PlayerAction action;
-    private int jumpBoost;
 
     public WrappedPacketInEntityAction(final Object packet) {
         super(packet);
     }
 
-    @Override
-    protected void setup() {
-        try {
-            final int entityId = Reflection.getField(entityActionClass, int.class, 0).getInt(packet);
-            final int jumpBoost;
-            if (version.isLowerThan(ServerVersion.v_1_8)) {
-                jumpBoost = Reflection.getField(entityActionClass, int.class, 2).getInt(packet);
-            } else {
-                jumpBoost = Reflection.getField(entityActionClass, int.class, 1).getInt(packet);
-            }
-
-            int animationIndex = -1;
-
-            //1.7.10
-            if (version.isLowerThan(ServerVersion.v_1_8)) {
-                animationIndex = Reflection.getField(entityActionClass, int.class, 1).getInt(packet); // TODO: += if packetdataserializer.version < 16
-            } else {
-                final Object enumObj = Reflection.getField(entityActionClass, enumPlayerActionClass, 0).get(packet);
-                final String enumValue = enumObj.toString();
-                try {
-                    this.action = PlayerAction.valueOf(enumValue);
-                } catch (IllegalArgumentException e) {
-                    //They aren't on a legacy version and the enum has changed
-                    final PlayerAction.UpdatedPlayerAction updatedPlayerAction = PlayerAction.UpdatedPlayerAction.valueOf(enumValue);
-                    this.action = PlayerAction.get(updatedPlayerAction.getIndex());
-                }
-            }
-
-
-            this.entityId = entityId;
-            this.jumpBoost = jumpBoost;
-            if (animationIndex != -1) {
-                this.action = PlayerAction.get(animationIndex);
-            }
-            this.entity = NMSUtils.getEntityById(this.entityId);
-        } catch (IllegalAccessException e) {
-            e.printStackTrace();
+    public static void load() {
+        Class<?> entityActionClass = NMSUtils.getNMSClassWithoutException("PacketPlayInEntityAction");
+        isLowerThan_v_1_8 = version.isLowerThan(ServerVersion.v_1_8);
+        if (!isLowerThan_v_1_8) {
+            enumPlayerActionClass = SubclassUtil.getSubClass(entityActionClass, "EnumPlayerAction");
+        }
+        //All the already existing values
+        for (PlayerAction val : PlayerAction.values()) {
+            cachedPlayerActionNames.put(val.name(), val);
         }
-    }
 
+        cachedPlayerActionNames.put("PRESS_SHIFT_KEY", PlayerAction.START_SNEAKING);
+        cachedPlayerActionNames.put("RELEASE_SHIFT_KEY", PlayerAction.STOP_SNEAKING);
+        cachedPlayerActionNames.put("RIDING_JUMP", PlayerAction.START_RIDING_JUMP);
+
+        cachedPlayerActionIDs.put(1, PlayerAction.START_SNEAKING);
+        cachedPlayerActionIDs.put(2, PlayerAction.STOP_SNEAKING);
+        cachedPlayerActionIDs.put(3, PlayerAction.STOP_SLEEPING);
+        cachedPlayerActionIDs.put(4, PlayerAction.START_SPRINTING);
+        cachedPlayerActionIDs.put(5, PlayerAction.STOP_SPRINTING);
+        cachedPlayerActionIDs.put(6, PlayerAction.START_RIDING_JUMP); //riding jump
+        cachedPlayerActionIDs.put(7, PlayerAction.OPEN_INVENTORY); //horse interaction
+
+    }
+    /**
+     * Lookup the associated entity by the ID that was sent in the packet.
+     *
+     * @return Entity
+     */
     public Entity getEntity() {
+        if(entity == null) {
+            return entity = NMSUtils.getEntityById(getEntityId());
+        }
         return entity;
     }
 
+    /**
+     * Get the ID of the entity.
+     * If you do not want to use {@link #getEntity()},
+     * you lookup the entity by yourself with this entity ID.
+     *
+     * @return Entity ID
+     */
     public int getEntityId() {
-        return entityId;
+        if(entityId != -1) {
+            return entityId;
+        }
+        return readInt(0);
     }
 
+    /**
+     * Get the player action.
+     *
+     * @return Player Action
+     */
     public PlayerAction getAction() {
-        return action;
+        if (isLowerThan_v_1_8) {
+            int animationIndex = readInt(1);
+            return cachedPlayerActionIDs.get(animationIndex);
+        } else {
+            final Object enumObj = readObject(0, enumPlayerActionClass);
+            final String enumValueName = enumObj.toString();
+            return cachedPlayerActionNames.get(enumValueName);
+        }
     }
 
+    /**
+     * Get the jump boost integer.
+     *
+     * @return Jump Boost
+     */
     public int getJumpBoost() {
-        return jumpBoost;
+        if (isLowerThan_v_1_8) {
+            return readInt(2);
+        } else {
+            return readInt(1);
+        }
     }
+
+    public enum PlayerAction {
+        START_SNEAKING,
+        STOP_SNEAKING,
+        STOP_SLEEPING,
+        START_SPRINTING,
+        STOP_SPRINTING,
+        START_RIDING_JUMP,
+        STOP_RIDING_JUMP,
+        OPEN_INVENTORY,
+        START_FALL_FLYING
+    }
+
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/flying/WrappedPacketInFlying.java

@@ -1,164 +1,66 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.in.flying;
 
 
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
 
 public class WrappedPacketInFlying extends WrappedPacket {
-    private static Class<?> flyingClass;
-
-    static {
-
-        try {
-            flyingClass = NMSUtils.getNMSClass("PacketPlayInFlying");
-        } catch (ClassNotFoundException e) {
-            e.printStackTrace();
-        }
-    }
-
-    private double x;
-    private double y;
-    private double z;
-    private float yaw;
-    private float pitch;
-    private boolean onGround;
-    private boolean isPosition;
-    private boolean isLook;
-
     public WrappedPacketInFlying(Object packet) {
         super(packet);
     }
-
-    @Override
-    protected void setup() {
-        try {
-            //x, y, z, yaw pitch, onGround, isPosition, isLook
-            this.x = Reflection.getField(flyingClass, double.class, 0).getDouble(packet);
-            this.y = Reflection.getField(flyingClass, double.class, 1).getDouble(packet);
-            this.z = Reflection.getField(flyingClass, double.class, 2).getDouble(packet);
-
-            this.yaw = Reflection.getField(flyingClass, float.class, 0).getFloat(packet);
-            this.pitch = Reflection.getField(flyingClass, float.class, 1).getFloat(packet);
-
-            this.onGround = Reflection.getField(flyingClass, boolean.class, 0).getBoolean(packet);
-
-            this.isPosition = Reflection.getField(flyingClass, boolean.class, 1).getBoolean(packet);
-            this.isLook = Reflection.getField(flyingClass, boolean.class, 2).getBoolean(packet);
-        } catch (IllegalAccessException e) {
-            e.printStackTrace();
-        }
+    
+    public double getX() {
+        return readDouble(0);
     }
 
-    public final double getX() {
-        return x;
+    public double getY() {
+        return readDouble(1);
     }
 
-    public final double getY() {
-        return y;
+    public double getZ() {
+        return readDouble(2);
     }
 
-    public final double getZ() {
-        return z;
+    public float getYaw() {
+        return readFloat(0);
     }
 
-    public final float getYaw() {
-        return yaw;
+    public float getPitch() {
+        return readFloat(1);
     }
 
-    public final float getPitch() {
-        return pitch;
+    public boolean isOnGround() {
+        return readBoolean(0);
     }
 
-    public final boolean isOnGround() {
-        return onGround;
+    public final boolean isPosition() {
+        return readBoolean(1);
     }
 
-    public boolean isPosition() {
-        return isPosition;
+    public final boolean isLook() {
+        return readBoolean(2);
     }
-
-    public boolean isLook() {
-        return isLook;
-    }
-
-    public static class WrappedPacketInPosition extends WrappedPacketInFlying {
-        public WrappedPacketInPosition(Object packet) {
-            super(packet);
-        }
-
-        @Override
-        public boolean isPosition() {
-            try {
-                return Reflection.getField(flyingClass, boolean.class, 1).getBoolean(packet);
-            } catch (IllegalAccessException e) {
-                e.printStackTrace();
-            }
-            return true;
-        }
-
-        @Override
-        public boolean isLook() {
-            try {
-                return Reflection.getField(flyingClass, boolean.class, 2).getBoolean(packet);
-            } catch (IllegalAccessException e) {
-                e.printStackTrace();
-            }
-            return false;
-        }
-    }
-
-    public static class WrappedPacketInPosition_Look extends WrappedPacketInFlying {
-        public WrappedPacketInPosition_Look(Object packet) {
-            super(packet);
-        }
-
-        @Override
-        public boolean isPosition() {
-            try {
-                return Reflection.getField(flyingClass, boolean.class, 1).getBoolean(packet);
-            } catch (IllegalAccessException e) {
-                e.printStackTrace();
-            }
-            return true;
-        }
-
-        @Override
-        public boolean isLook() {
-            try {
-                return Reflection.getField(flyingClass, boolean.class, 2).getBoolean(packet);
-            } catch (IllegalAccessException e) {
-                e.printStackTrace();
-            }
-            return true;
-        }
-    }
-
-    public static class WrappedPacketInLook extends WrappedPacketInFlying {
-
-        public WrappedPacketInLook(Object packet) {
-            super(packet);
-        }
-
-        @Override
-        public boolean isPosition() {
-            try {
-                return Reflection.getField(flyingClass, boolean.class, 1).getBoolean(packet);
-            } catch (IllegalAccessException e) {
-                e.printStackTrace();
-            }
-            return false;
-        }
-
-        @Override
-        public boolean isLook() {
-            try {
-                return Reflection.getField(flyingClass, boolean.class, 2).getBoolean(packet);
-            } catch (IllegalAccessException e) {
-                e.printStackTrace();
-            }
-            return true;
-        }
-    }
-
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/helditemslot/WrappedPacketInHeldItemSlot.java

@@ -1,37 +1,43 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.in.helditemslot;
 
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
 
 public final class WrappedPacketInHeldItemSlot extends WrappedPacket {
-    private static Class<?> packetClass;
-
-    static {
-        try {
-            packetClass = NMSUtils.getNMSClass("PacketPlayInHeldItemSlot");
-        } catch (Exception e) {
-            e.printStackTrace();
-        }
-    }
-
-    private int itemInHandIndex;
-
     public WrappedPacketInHeldItemSlot(Object packet) {
         super(packet);
     }
 
-    @Override
-    public void setup() {
-        try {
-            itemInHandIndex = Reflection.getField(packetClass, int.class, 0).getInt(packet);
-        } catch (Exception e) {
-            e.printStackTrace();
-        }
-    }
-
-    public int getItemInHandIndex() {
-        return itemInHandIndex;
+    /**
+     * Get the index of the item we currently have in hand.
+     * @return Item in hand Index
+     */
+    public int getCurrentSelectedSlot() {
+        return readInt(0);
     }
 
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/keepalive/WrappedPacketInKeepAlive.java

@@ -1,50 +1,60 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.in.keepalive;
 
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.reflection.Reflection;
 
 public final class WrappedPacketInKeepAlive extends WrappedPacket {
     private static Class<?> packetClass;
-
-    static {
-        try {
-            packetClass = NMSUtils.getNMSClass("PacketPlayInKeepAlive");
-        } catch (ClassNotFoundException e) {
-            e.printStackTrace();
-        }
-    }
-
+    private static boolean integerPresentInIndex0;
     private long id;
 
     public WrappedPacketInKeepAlive(final Object packet) {
         super(packet);
     }
 
-    @Override
-    protected void setup() {
-        if (Reflection.getField(packetClass, int.class, 0) == null) {
-            try {
-                this.id = Reflection.getField(packetClass, long.class, 0).getLong(packet);
-            } catch (IllegalAccessException e) {
-                e.printStackTrace();
-            }
-        } else {
-            try {
-                this.id = Reflection.getField(packetClass, int.class, 0).getInt(packet);
-            } catch (IllegalAccessException e) {
-                e.printStackTrace();
-            }
-        }
+    public static void load() {
+        packetClass = PacketTypeClasses.Client.KEEP_ALIVE;
+        integerPresentInIndex0 = Reflection.getField(packetClass, int.class, 0) != null;
     }
 
     /**
-     * Optionally Cast this long to an integer if you are using 1.7.10->1.12.2!
-     * In 1.13.2->1.16.1 a long is sent
+     * Get the ID response from the client.
      *
-     * @return response is
+     * You may cast this down to an int if you are on 1.7.10 - 1.12.2.
+     * On 1.13.2 - 1.16.3 a long is sent.
+     * @return response ID
      */
     public long getId() {
-        return id;
+        if(!integerPresentInIndex0) {
+            return readLong(0);
+        }
+        else {
+            return readInt(0);
+        }
     }
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/settings/WrappedPacketInSettings.java

@@ -1,78 +1,129 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.in.settings;
 
 import io.github.retrooper.packetevents.annotations.Nullable;
-import io.github.retrooper.packetevents.enums.ServerVersion;
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.github.retrooper.packetevents.utils.reflection.SubclassUtil;
+import io.github.retrooper.packetevents.utils.server.ServerVersion;
 
 import java.util.HashMap;
 
 public class WrappedPacketInSettings extends WrappedPacket {
-    private static Class<?> packetClass;
     private static Class<?> chatVisibilityEnumClass;
 
-    static {
-        try {
-            packetClass = NMSUtils.getNMSClass("PacketPlayInSettings");
-        } catch (ClassNotFoundException e) {
-            e.printStackTrace();
-        }
+    private static boolean isLowerThan_v_1_8;
+    private Object chatVisibilityEnumObj;
+    private HashMap<DisplayedSkinPart, Boolean> displayedSkinParts = new HashMap<>();
+
+    public WrappedPacketInSettings(final Object packet) {
+        super(packet);
+    }
+
+    public static void load() {
+        Class<?> packetClass = PacketTypeClasses.Client.SETTINGS;
+
+        isLowerThan_v_1_8 = version.isLowerThan(ServerVersion.v_1_8);
 
         try {
             chatVisibilityEnumClass = NMSUtils.getNMSClass("EnumChatVisibility");
         } catch (ClassNotFoundException e) {
             Class<?> entityHumanClass = NMSUtils.getNMSClassWithoutException("EntityHuman");
             //They are just on an outdated version
-            chatVisibilityEnumClass = Reflection.getSubClass(entityHumanClass, "EnumChatVisibility");
+            assert entityHumanClass != null;
+            chatVisibilityEnumClass = SubclassUtil.getSubClass(entityHumanClass, "EnumChatVisibility");
         }
     }
 
-    private String locale;
-    private byte viewDistance;
-    private ChatVisibility chatVisibility;
-    private boolean chatColors;
-    private HashMap<DisplayedSkinPart, Boolean> displayedSkinParts;
-    public WrappedPacketInSettings(final Object packet) {
-        super(packet);
+    /**
+     * Get language client setting
+     *
+     * @return String Locale
+     */
+    public String getLocale() {
+        return readString(0);
     }
 
-    public static Class<?> getChatVisibilityEnumClass() {
-        return chatVisibilityEnumClass;
+    /**
+     * Get client view distance.
+     *
+     * @return View Distance
+     */
+    public int getViewDistance() {
+        return readInt(0);
     }
 
-    @Override
-    protected void setup() {
-        try {
-            //LOCALE
-            this.locale = Reflection.getField(packetClass, String.class, 0).get(packet).toString();
-            //VIEW DISTANCE
-            this.viewDistance = (byte) Reflection.getField(packetClass, int.class, 0).getInt(packet);
+    /**
+     * Get Chat Visibility
+     *
+     * @return Chat Visibility
+     */
+    public ChatVisibility getChatVisibility() {
+        if (chatVisibilityEnumObj == null) {
+            chatVisibilityEnumObj = readObject(0, chatVisibilityEnumClass);
+        }
+        String enumValueAsString = chatVisibilityEnumObj.toString();
+        if (enumValueAsString.equals("FULL")) {
+            return ChatVisibility.ENABLED;
+        } else if (enumValueAsString.equals("SYSTEM")) {
+            return ChatVisibility.COMMANDS_ONLY;
+        } else {
+            return ChatVisibility.HIDDEN;
+        }
+    }
 
-            //CHAT VISIBILITY
-            Object chatVisibilityEnumObject = Reflection.getField(packetClass, chatVisibilityEnumClass, 0).get(packet);
-            String enumValueAsString = chatVisibilityEnumObject.toString();
-            if (enumValueAsString.equals("FULL")) {
-                chatVisibility = ChatVisibility.ENABLED;
-            } else if (enumValueAsString.equals("SYSTEM")) {
-                chatVisibility = ChatVisibility.COMMANDS_ONLY;
-            } else {
-                chatVisibility = ChatVisibility.HIDDEN;
-            }
+    /**
+     * Is chat colors
+     *
+     * @return Chat Colors
+     */
+    public boolean isChatColors() {
+        return readBoolean(0);
+    }
 
-            //CHAT COLORS
-            this.chatColors = Reflection.getField(packetClass, boolean.class, 0).getBoolean(packet);
-
-            //DISPLAYED SKIN PARTS
-            this.displayedSkinParts = new HashMap<DisplayedSkinPart, Boolean>();
-
-            if (version.isLowerThan(ServerVersion.v_1_8)) {
+    /**
+     * Get Displayed skin parts.
+     * <p>
+     * It is possible for some keys to not exist.
+     * If that is the case, the server version is 1.7.10.
+     * 1.7.10 only sends the cape skin part.
+     *
+     * @return A map with a Skin Parts as a key, and a boolean as a value.
+     */
+    @Nullable
+    public HashMap<DisplayedSkinPart, Boolean> getDisplayedSkinPartsMap() {
+        if (displayedSkinParts.isEmpty()) {
+            if (isLowerThan_v_1_8) {
                 //in 1.7.10 only the cape display skin part is sent
-                boolean capeEnabled = Reflection.getField(packetClass, boolean.class, 1).getBoolean(packet);
+                boolean capeEnabled = readBoolean(1);
                 displayedSkinParts.put(DisplayedSkinPart.CAPE, capeEnabled);
             } else {
                 //in 1.8, all the skin parts are sent
-                int skinPartFlags = Reflection.getField(packetClass, int.class, 1).getInt(packet);
+                int skinPartFlags = readInt(1);
                 displayedSkinParts.put(DisplayedSkinPart.CAPE, (skinPartFlags & 0x01) != 0);
                 displayedSkinParts.put(DisplayedSkinPart.JACKET, (skinPartFlags & 0x02) != 0);
                 displayedSkinParts.put(DisplayedSkinPart.LEFT_SLEEVE, (skinPartFlags & 0x04) != 0);
@@ -81,47 +132,23 @@ public class WrappedPacketInSettings extends WrappedPacket {
                 displayedSkinParts.put(DisplayedSkinPart.RIGHT_PANTS, (skinPartFlags & 0x20) != 0);
                 displayedSkinParts.put(DisplayedSkinPart.HAT, (skinPartFlags & 0x40) != 0);
             }
-
-        } catch (Exception e) {
-            e.printStackTrace();
         }
-
-    }
-
-    public String getLocale() {
-        return locale;
-    }
-
-    public byte getViewDistance() {
-        return viewDistance;
-    }
-
-    public ChatVisibility getChatVisibility() {
-        return chatVisibility;
-    }
-
-    public boolean isChatColors() {
-        return chatColors;
-    }
-
-    /**
-     * It is possible for some keys to not exist.
-     * If that is the case, the server version is 1.7.10.
-     * 1.7.10 only sends the cape skin part.
-     */
-    @Nullable
-    public HashMap<DisplayedSkinPart, Boolean> getDisplayedSkinPartsMap() {
         return displayedSkinParts;
     }
 
     /**
+     * Is the skin part enabled.
+     * <p>
      * On 1.7.10, some skin parts will default to 'false' as 1.7.10
      * only sends the 'cape' skin part.
      *
-     * @param part
-     * @return
+     * @param part The skin part to check the status of.
+     * @return Is the skin part enabled
      */
     public boolean isDisplaySkinPartEnabled(DisplayedSkinPart part) {
+        if(displayedSkinParts.isEmpty()) {
+            displayedSkinParts = getDisplayedSkinPartsMap();
+        }
         //1.7.10, we will default the other skin parts to return false.
         if (!displayedSkinParts.containsKey(part)) {
             return false;
@@ -129,10 +156,16 @@ public class WrappedPacketInSettings extends WrappedPacket {
         return displayedSkinParts.get(part);
     }
 
+    /**
+     * Enum for the client chat visibility setting
+     */
     public enum ChatVisibility {
         ENABLED, COMMANDS_ONLY, HIDDEN
     }
 
+    /**
+     * Enum for the client displayed skin parts settings
+     */
     public enum DisplayedSkinPart {
         CAPE, JACKET, LEFT_SLEEVE, RIGHT_SLEEVE, LEFT_PANTS, RIGHT_PANTS, HAT
     }

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/steervehicle/WrappedPacketInSteerVehicle.java

@@ -1,55 +1,73 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.in.steervehicle;
 
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
 
 public class WrappedPacketInSteerVehicle extends WrappedPacket {
-    private static Class<?> packetClass;
-
-    static {
-        try {
-            packetClass = NMSUtils.getNMSClass("PacketPlayInSteerVehicle");
-        } catch (ClassNotFoundException e) {
-            e.printStackTrace();
-        }
-    }
-
-    private float side, forward;
-    private boolean jump, unmount;
-
     public WrappedPacketInSteerVehicle(Object packet) {
         super(packet);
     }
 
-    @Override
-    protected void setup() {
-        try {
-            this.side = Reflection.getField(packetClass, float.class, 0).getFloat(packet);
-            this.forward = Reflection.getField(packetClass, float.class, 1).getFloat(packet);
-
-            this.jump = Reflection.getField(packetClass, boolean.class, 0).getBoolean(packet);
-            this.unmount = Reflection.getField(packetClass, boolean.class, 1).getBoolean(packet);
-        } catch (IllegalAccessException e) {
-            e.printStackTrace();
-        }
-    }
-
-    //Positive side value means left, negative means right
+    /**
+     * Get the side value.
+     * <p>
+     * If positive, they are moving to the left, if negative, they are moving to the right.
+     *
+     * @return Side Value
+     */
     public float getSideValue() {
-        return side;
+        return readFloat(0);
     }
 
-    //Positive forward value means forward, negative is backwards
+    /**
+     * Get the forward value.
+     * <p>
+     * If positive, they are moving forward, if negative, they are moving backwards.
+     *
+     * @return Forward Value
+     */
     public float getForwardValue() {
-        return forward;
+        return readFloat(1);
     }
 
+    /**
+     * Is a Jump
+     *
+     * @return Is Jump
+     */
     public boolean isJump() {
-        return jump;
+        return readBoolean(0);
     }
 
+    /**
+     * Is an unmount
+     *
+     * @return Is Unmounting
+     */
     public boolean isUnmount() {
-        return unmount;
+        return readBoolean(1);
     }
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/transaction/WrappedPacketInTransaction.java

@@ -1,49 +1,60 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.in.transaction;
 
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
 
 public final class WrappedPacketInTransaction extends WrappedPacket {
-    private static Class<?> packetClass;
-
-    static {
-        try {
-            packetClass = NMSUtils.getNMSClass("PacketPlayInTransaction");
-        } catch (ClassNotFoundException e) {
-            e.printStackTrace();
-        }
-    }
-
-    private int windowId;
-    private short actionNumber;
-    private boolean accepted;
-
     public WrappedPacketInTransaction(final Object packet) {
         super(packet);
     }
 
-    @Override
-    protected void setup() {
-        try {
-            this.windowId = Reflection.getField(packetClass, int.class, 0).getInt(packet);
-            this.actionNumber = Reflection.getField(packetClass, short.class, 0).getShort(packet);
-            this.accepted = Reflection.getField(packetClass, boolean.class, 0).getBoolean(packet);
-        } catch (IllegalAccessException e) {
-            e.printStackTrace();
-        }
-
-    }
-
+    /**
+     * Get the window ID.
+     *
+     * @return Window ID
+     */
     public int getWindowId() {
-        return windowId;
+        return readInt(0);
     }
 
+    /**
+     * Get the action number.
+     *
+     * @return Action number
+     */
     public short getActionNumber() {
-        return actionNumber;
+        return readShort(0);
     }
 
+    /**
+     * Is transaction accepted.
+     *
+     * @return Transaction Accepted
+     */
     public boolean isAccepted() {
-        return accepted;
+        return readBoolean(0);
     }
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/updatesign/WrappedPacketInUpdateSign.java

@@ -0,0 +1,118 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers.in.updatesign;
+
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.packetwrappers.out.chat.WrappedPacketOutChat;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.github.retrooper.packetevents.utils.reflection.Reflection;
+
+public class WrappedPacketInUpdateSign extends WrappedPacket {
+    private static boolean v_1_7_mode, strArrayMode;
+    private static Class<?> blockPosClass, iChatBaseComponentClass;
+
+    private Object blockPosObj;
+
+    public static void load() {
+        v_1_7_mode = Reflection.getField(PacketTypeClasses.Client.UPDATE_SIGN, int.class, 0) != null;
+        strArrayMode = Reflection.getField(PacketTypeClasses.Client.UPDATE_SIGN, String[].class, 0) != null;
+
+        try {
+            blockPosClass = NMSUtils.getNMSClass("BlockPosition");
+        } catch (ClassNotFoundException e) {
+            if (!v_1_7_mode) {
+                e.printStackTrace();
+            }
+        }
+        try {
+            iChatBaseComponentClass = NMSUtils.getNMSClass("IChatBaseComponent");
+        } catch (ClassNotFoundException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public WrappedPacketInUpdateSign(Object packet) {
+        super(packet);
+    }
+
+    public int getX() {
+        if(v_1_7_mode) {
+            return readInt(0);
+        }
+        else {
+            if(blockPosObj == null) {
+                blockPosObj = readObject(0, blockPosClass);
+                WrappedPacket blockPosWrapper = new WrappedPacket(blockPosObj);
+                return blockPosWrapper.readInt(0);
+            }
+        }
+        return 0;
+    }
+
+    public int getY() {
+        if(v_1_7_mode) {
+            return readInt(1);
+        }
+        else {
+            if(blockPosObj == null) {
+                blockPosObj = readObject(0, blockPosClass);
+                WrappedPacket blockPosWrapper = new WrappedPacket(blockPosObj);
+                return blockPosWrapper.readInt(1);
+            }
+        }
+        return 0;
+    }
+
+    public int getZ() {
+        if(v_1_7_mode) {
+            return readInt(2);
+        }
+        else {
+            if(blockPosObj == null) {
+                blockPosObj = readObject(0, blockPosClass);
+                WrappedPacket blockPosWrapper = new WrappedPacket(blockPosObj);
+                return blockPosWrapper.readInt(2);
+            }
+        }
+        return 0;
+    }
+
+    public String[] getTextLines() {
+        if (strArrayMode) {
+            //1.7.10 and the newest versions use this
+            return readStringArray(0);
+        } else {
+            //1.8 uses this for example
+            Object[] iChatComponents = readObjectArray(0, iChatBaseComponentClass);
+            String[] lines = new String[iChatComponents.length];
+            for (int i = 0; i < iChatComponents.length; i++) {
+                lines[i] = WrappedPacketOutChat.
+                        toStringFromIChatBaseComponent(iChatComponents[i]);
+            }
+            return lines;
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/useentity/WrappedPacketInUseEntity.java

@@ -1,63 +1,93 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.in.useentity;
 
-import io.github.retrooper.packetevents.enums.minecraft.EntityUseAction;
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.github.retrooper.packetevents.utils.reflection.SubclassUtil;
 import org.bukkit.entity.Entity;
 
 public final class WrappedPacketInUseEntity extends WrappedPacket {
-    private static Class<?> useEntityClass, entityClass, enumEntityUseActionClass;
-
-    static {
-
-        try {
-            useEntityClass = NMSUtils.getNMSClass("PacketPlayInUseEntity");
-            entityClass = NMSUtils.getNMSClass("Entity");
-        } catch (ClassNotFoundException e) {
-            e.printStackTrace();
-        }
-
-        try {
-            enumEntityUseActionClass = NMSUtils.getNMSClass("EnumEntityUseAction");
-        } catch (ClassNotFoundException e) {
-            //That is fine, it is probably a subclass
-            for (final Class<?> sub : useEntityClass.getDeclaredClasses()) {
-                if (sub.getSimpleName().equals("EnumEntityUseAction")) {
-                    enumEntityUseActionClass = sub;
-                    break;
-                }
-            }
-        }
-    }
-
-    private int entityId;
-    private EntityUseAction action;
-
+    private static Class<?> enumEntityUseActionClass;
+    private Entity entity;
+    private int entityID = -1;
     public WrappedPacketInUseEntity(final Object packet) {
         super(packet);
     }
 
-    @Override
-    protected void setup() {
+    public static void load() {
+        //System.out.println("USE ENTITY HAS BEEN LOADED BROOOIOII");
+        Class<?> useEntityClass = NMSUtils.getNMSClassWithoutException("PacketPlayInUseEntity");
+        /*if(useEntityClass == null) {
+            System.out.println("failed to init use entity wtfffff");
+        }*/
         try {
-            this.entityId = Reflection.getField(useEntityClass, int.class, 0).getInt(packet);
-            final Object useActionEnum = Reflection.getField(useEntityClass, enumEntityUseActionClass, 0).get(packet);
-            this.action = EntityUseAction.valueOf(useActionEnum.toString());
-        } catch (IllegalAccessException e) {
-            e.printStackTrace();
+            enumEntityUseActionClass = NMSUtils.getNMSClass("EnumEntityUseAction");
+        } catch (ClassNotFoundException e) {
+            //That is fine, it is probably a subclass
+            enumEntityUseActionClass = SubclassUtil.getSubClass(useEntityClass, "EnumEntityUseAction");
         }
     }
 
+
+    /**
+     * Lookup the associated entity by the ID that was sent in the packet.
+     * @return Entity
+     */
     public Entity getEntity() {
-        return NMSUtils.getEntityById(this.entityId);
+        if(entity != null) {
+            return entity;
+        }
+        return entity = NMSUtils.getEntityById(getEntityID());
     }
 
-    public int getEntityId() {
-        return entityId;
+    /**
+     * Get the ID of the entity.
+     * If you do not want to use {@link #getEntity()},
+     * you lookup the entity by yourself with this entity ID.
+     * @return Entity ID
+     */
+    public int getEntityID() {
+        if(entityID != -1) {
+            return entityID;
+        }
+        else {
+            return entityID = readInt(0);
+        }
     }
 
+    /**
+     * Get the associated action.
+     * @return Get EntityUseAction
+     */
     public EntityUseAction getAction() {
-        return action;
+        final Object useActionEnum = readObject(0, enumEntityUseActionClass);
+        return EntityUseAction.valueOf(useActionEnum.toString());
+    }
+
+    public enum EntityUseAction {
+        INTERACT, INTERACT_AT, ATTACK, INVALID
     }
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/in/windowclick/WrappedPacketInWindowClick.java

@@ -0,0 +1,220 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers.in.windowclick;
+
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.reflection.Reflection;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import org.bukkit.inventory.ItemStack;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+
+public class WrappedPacketInWindowClick extends WrappedPacket {
+    private static final HashMap<String, Integer> invClickTypeMapCache = new HashMap<String, Integer>();
+    private static final HashMap<Integer, ArrayList<WindowClickType>> windowClickTypeCache = new HashMap<Integer, ArrayList<WindowClickType>>();
+    private static Class<?> packetClass, invClickTypeClass;
+    private static boolean isClickModePrimitive = false;
+    private int id;
+    private int slot;
+    private int button;
+    private short actionNumber;
+    private int mode;
+    private ItemStack clickedItem;
+
+    public WrappedPacketInWindowClick(Object packet) {
+        super(packet);
+    }
+
+    public static void load() {
+        packetClass = PacketTypeClasses.Client.WINDOW_CLICK;
+        invClickTypeClass = NMSUtils.getNMSClassWithoutException("InventoryClickType");
+
+        invClickTypeMapCache.put("PICKUP", 0);
+        invClickTypeMapCache.put("QUICK_MOVE", 1);
+        invClickTypeMapCache.put("SWAP", 2);
+        invClickTypeMapCache.put("CLONE", 3);
+        invClickTypeMapCache.put("THROW", 4);
+        invClickTypeMapCache.put("QUICK_CRAFT", 5);
+        invClickTypeMapCache.put("PICKUP_ALL", 6);
+
+        //MODE 0
+        windowClickTypeCache.put(0, getArrayListOfWindowClickTypes(WindowClickType.LEFT_MOUSE_CLICK,
+                WindowClickType.RIGHT_MOUSE_CLICK));
+
+        //MODE 1
+        windowClickTypeCache.put(1, getArrayListOfWindowClickTypes(WindowClickType.SHIFT_LEFT_MOUSE_CLICK,
+                WindowClickType.SHIFT_RIGHT_MOUSE_CLICK));
+
+        //MODE 2
+        windowClickTypeCache.put(2, getArrayListOfWindowClickTypes(
+                WindowClickType.KEY_NUMBER1,
+                WindowClickType.KEY_NUMBER2,
+                WindowClickType.KEY_NUMBER3,
+                WindowClickType.KEY_NUMBER4,
+                WindowClickType.KEY_NUMBER5,
+                WindowClickType.KEY_NUMBER6,
+                WindowClickType.KEY_NUMBER7,
+                WindowClickType.KEY_NUMBER8,
+                WindowClickType.KEY_NUMBER9));
+
+        //MODE 3
+        windowClickTypeCache.put(3, getArrayListOfWindowClickTypes(WindowClickType.UNKNOWN, WindowClickType.UNKNOWN, WindowClickType.CREATIVE_MIDDLE_CLICK));
+
+        //MODE 4
+        windowClickTypeCache.put(4, getArrayListOfWindowClickTypes(WindowClickType.KEY_DROP,
+                WindowClickType.KEY_DROP_STACK));
+
+        //MODE 5
+        windowClickTypeCache.put(5, getArrayListOfWindowClickTypes(
+                WindowClickType.STARTING_LEFT_MOUSE_DRAG,
+                WindowClickType.ADD_SLOT_LEFT_MOUSE_DRAG,
+                WindowClickType.ENDING_LEFT_MOUSE_DRAG,
+                WindowClickType.UNKNOWN,
+                WindowClickType.STARTING_RIGHT_MOUSE_DRAG,
+                WindowClickType.ADD_SLOT_RIGHT_MOUSE_DRAG,
+                WindowClickType.CREATIVE_STARTING_MIDDLE_MOUSE_DRAG,
+                WindowClickType.ADD_SLOT_MIDDLE_MOUSE_DRAG,
+                WindowClickType.ENDING_MIDDLE_MOUSE_DRAG));
+
+        windowClickTypeCache.put(6, getArrayListOfWindowClickTypes(WindowClickType.DOUBLE_CLICK));
+        isClickModePrimitive = Reflection.getField(packetClass, int.class, 3) != null;
+        invClickTypeClass = NMSUtils.getNMSClassWithoutException("InventoryClickType");
+    }
+
+    private static ArrayList<WindowClickType> getArrayListOfWindowClickTypes(WindowClickType... types) {
+        ArrayList<WindowClickType> arrayList = new ArrayList<WindowClickType>(types.length);
+        arrayList.addAll(Arrays.asList(types));
+        return arrayList;
+    }
+
+    /**
+     * Get the Window ID.
+     * @return Get Window ID
+     */
+    public int getWindowID() {
+        return readInt(0);
+    }
+
+    /**
+     * Get the Window slot.
+     * @return Get Window Slot
+     */
+    public int getWindowSlot() {
+        return readInt(1);
+    }
+
+    /**
+     * Get the Window button.
+     * @return Get Window Button
+     */
+    public int getWindowButton() {
+        return readInt(2);
+    }
+
+    /**
+     * Get the action number.
+     * @return Get Action Number
+     */
+    public short getActionNumber() {
+        return readShort(0);
+    }
+
+    /**
+     * Get the window click type.
+     * @return Get Window Click Type
+     */
+    public WindowClickType getWindowClickType() {
+        if (windowClickTypeCache.get(mode) == null) {
+            return WindowClickType.UNKNOWN;
+        }
+        if (button + 1 > windowClickTypeCache.size()) {
+            return WindowClickType.UNKNOWN;
+        }
+
+        if (mode == 4) {
+            if (slot == -999) {
+                if (button == 0) {
+                    return WindowClickType.LEFT_CLICK_OUTSIDE_WINDOW_HOLDING_NOTHING;
+                } else if (button == 1) {
+                    return WindowClickType.RIGHT_CLICK_OUTSIDE_WINDOW_HOLDING_NOTHING;
+                }
+            }
+        }
+        return windowClickTypeCache.get(mode).get(button);
+    }
+
+    /**
+     * Get the Window mode.
+     * @return Get Window Mode.
+     */
+    public int getMode() {
+        if (isClickModePrimitive) {
+            return readInt(3);
+        } else {
+            return invClickTypeMapCache.get(readObject(5, invClickTypeClass).toString());
+        }
+    }
+
+    /**
+     * Get the clicked item.
+     * @return Get Clicked ItemStack
+     */
+    public ItemStack getClickedItem() {
+        Object nmsItemStack = readObject(0, NMSUtils.nmsItemStackClass);
+        return NMSUtils.toBukkitItemStack(nmsItemStack);
+    }
+
+    public enum WindowClickType {
+        LEFT_MOUSE_CLICK, RIGHT_MOUSE_CLICK,
+        SHIFT_LEFT_MOUSE_CLICK, SHIFT_RIGHT_MOUSE_CLICK,
+
+        CREATIVE_MIDDLE_CLICK, CREATIVE_STARTING_MIDDLE_MOUSE_DRAG,
+
+        KEY_NUMBER1, KEY_NUMBER2, KEY_NUMBER3, KEY_NUMBER4,
+        KEY_NUMBER5, KEY_NUMBER6, KEY_NUMBER7, KEY_NUMBER8,
+        KEY_NUMBER9, KEY_DROP, KEY_DROP_STACK,
+
+        LEFT_CLICK_OUTSIDE_WINDOW_HOLDING_NOTHING,
+        RIGHT_CLICK_OUTSIDE_WINDOW_HOLDING_NOTHING,
+
+        STARTING_LEFT_MOUSE_DRAG,
+        STARTING_RIGHT_MOUSE_DRAG,
+
+        ADD_SLOT_LEFT_MOUSE_DRAG,
+        ADD_SLOT_RIGHT_MOUSE_DRAG,
+        ADD_SLOT_MIDDLE_MOUSE_DRAG,
+
+        ENDING_LEFT_MOUSE_DRAG,
+        ENDING_RIGHT_MOUSE_DRAG,
+        ENDING_MIDDLE_MOUSE_DRAG,
+
+        DOUBLE_CLICK,
+
+        UNKNOWN
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/login/in/WrappedPacketLoginHandshake.java

@@ -0,0 +1,45 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers.login.in;
+
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+
+public class WrappedPacketLoginHandshake extends WrappedPacket {
+    public WrappedPacketLoginHandshake(Object packet) {
+        super(packet);
+    }
+
+    public int getProtocolVersion() {
+        return readInt(0);
+    }
+
+    public String getHostName() {
+        return readString(0);
+    }
+
+    public int getPort() {
+        return readInt(1);
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/login/in/WrappedPacketLoginInCustomPayload.java

@@ -0,0 +1,42 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers.login.in;
+
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+
+public class WrappedPacketLoginInCustomPayload extends WrappedPacket {
+    public WrappedPacketLoginInCustomPayload(Object packet) {
+        super(packet);
+    }
+
+
+    /* TODO wrappers
+     * net.minecraft.server.v1_16_R2.PacketLoginInCustomPayload inCP;
+     * net.minecraft.server.v1_16_R2.PacketLoginOutCustomPayload outCP;
+     * net.minecraft.server.v1_16_R2.PacketPlayOutLogin outLogin;
+     * Find out about the Status Response packet
+     */
+}
+

src/main/java/io/github/retrooper/packetevents/packetwrappers/login/in/WrappedPacketLoginInStart.java

@@ -0,0 +1,40 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers.login.in;
+
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.gameprofile.GameProfileUtil;
+import io.github.retrooper.packetevents.utils.gameprofile.WrappedGameProfile;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+
+public class WrappedPacketLoginInStart extends WrappedPacket {
+    public WrappedPacketLoginInStart(Object packet) {
+        super(packet);
+    }
+
+    public WrappedGameProfile getGameProfile() {
+        return GameProfileUtil.getWrappedGameProfile(readObject(0, NMSUtils.gameProfileClass));
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/login/in/WrapppedPacketLoginInEncryptionBegin.java

@@ -0,0 +1,41 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers.login.in;
+
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+
+public class WrapppedPacketLoginInEncryptionBegin extends WrappedPacket {
+    public WrapppedPacketLoginInEncryptionBegin(Object packet) {
+        super(packet);
+    }
+
+    public byte[] getPublicKey() {
+        return readByteArray(0);
+    }
+
+    public byte[] getVerifyToken() {
+        return readByteArray(1);
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/login/out/WrappedPacketLoginDisconnect.java

@@ -0,0 +1,40 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers.login.out;
+
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.packetwrappers.out.chat.WrappedPacketOutChat;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+
+public class WrappedPacketLoginDisconnect extends WrappedPacket {
+    public WrappedPacketLoginDisconnect(Object packet) {
+        super(packet);
+    }
+
+    public String getReason() {
+        Object iChatBaseComponent = readObject(0, NMSUtils.iChatBaseComponentClass);
+        return WrappedPacketOutChat.toStringFromIChatBaseComponent(iChatBaseComponent);
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/login/out/WrappedPacketLoginOutEncryptionBegin.java

@@ -0,0 +1,47 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers.login.out;
+
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+
+import java.security.PublicKey;
+
+public class WrappedPacketLoginOutEncryptionBegin extends WrappedPacket {
+    public WrappedPacketLoginOutEncryptionBegin(Object packet) {
+        super(packet);
+    }
+
+    public String getEncodedString() {
+        return readString(0);
+    }
+
+    public PublicKey getPublicKey() {
+        return (PublicKey) readObject(1, PublicKey.class);
+    }
+
+    public byte[] getByteArray() {
+        return readByteArray(0);
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/login/out/WrappedPacketLoginOutSetCompression.java

@@ -0,0 +1,41 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers.login.out;
+
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+
+//This packet does not exist on 1.7.10
+public class WrappedPacketLoginOutSetCompression extends WrappedPacket {
+    public WrappedPacketLoginOutSetCompression(Object packet) {
+        super(packet);
+    }
+
+    /**
+     * Maximum size of a packet before it can be compressed.
+     */
+    public int getThreshold() {
+        return readInt(0);
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/login/out/WrappedPacketLoginOutSuccess.java

@@ -0,0 +1,40 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers.login.out;
+
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.gameprofile.GameProfileUtil;
+import io.github.retrooper.packetevents.utils.gameprofile.WrappedGameProfile;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+
+public class WrappedPacketLoginOutSuccess extends WrappedPacket {
+    public WrappedPacketLoginOutSuccess(Object packet) {
+        super(packet);
+    }
+
+    public WrappedGameProfile getGameProfile() {
+        return GameProfileUtil.getWrappedGameProfile(readObject(0, NMSUtils.gameProfileClass));
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/out/abilities/PlayerAbilitiesUtils.java

@@ -1,7 +1,32 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.out.abilities;
 
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.reflection.Reflection;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
 
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
@@ -26,13 +51,13 @@ final class PlayerAbilitiesUtils {
     public static Object getPlayerAbilities(final boolean isVulnerable, final boolean isFlying, final boolean allowFlight, final boolean canBuildInstantly,
                                             final float flySpeed, final float walkSpeed) throws IllegalAccessException, InvocationTargetException, InstantiationException {
         final Object instance = playerAbilitiesConstructor.newInstance();
-        Reflection.getField(playerAbilitiesClass, boolean.class, 0).setBoolean(instance, isVulnerable);
-        Reflection.getField(playerAbilitiesClass, boolean.class, 1).setBoolean(instance, isFlying);
-        Reflection.getField(playerAbilitiesClass, boolean.class, 2).setBoolean(instance, allowFlight);
-        Reflection.getField(playerAbilitiesClass, boolean.class, 3).setBoolean(instance, canBuildInstantly);
-
-        Reflection.getField(playerAbilitiesClass, float.class, 0).setFloat(instance, flySpeed);
-        Reflection.getField(playerAbilitiesClass, float.class, 1).setFloat(instance, walkSpeed);
+        WrappedPacket wrapper = new WrappedPacket(instance);
+        wrapper.writeBoolean(0, isVulnerable);
+        wrapper.writeBoolean(1, isFlying);
+        wrapper.writeBoolean(2, allowFlight);
+        wrapper.writeBoolean(3, canBuildInstantly);
+        wrapper.writeFloat(0, flySpeed);
+        wrapper.writeFloat(1, walkSpeed);
         return instance;
     }
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/out/abilities/WrappedPacketOutAbilities.java

@@ -1,36 +1,46 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.out.abilities;
 
-import io.github.retrooper.packetevents.packetwrappers.Sendable;
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.SendableWrapper;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
 
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
 
-public final class WrappedPacketOutAbilities extends WrappedPacket implements Sendable {
+public final class WrappedPacketOutAbilities extends WrappedPacket implements SendableWrapper {
     private static Class<?> packetClass;
     private static Constructor<?> packetConstructor;
-
-    static {
-        try {
-            packetClass = NMSUtils.getNMSClass("PacketPlayOutAbilities");
-        } catch (ClassNotFoundException e) {
-            e.printStackTrace();
-        }
-
-        try {
-            packetConstructor = packetClass.getConstructor(PlayerAbilitiesUtils.playerAbilitiesClass);
-        } catch (NoSuchMethodException e) {
-            e.printStackTrace();
-        }
-    }
-
+    private boolean isListening = false;
     private boolean vulnerable, flying, allowFlight, instantBuild;
     private float flySpeed, walkSpeed;
 
     public WrappedPacketOutAbilities(final Object packet) {
         super(packet);
+        isListening = true;
     }
 
     public WrappedPacketOutAbilities(final boolean isVulnerable, final boolean isFlying, final boolean allowFlight, final boolean canBuildInstantly,
@@ -44,44 +54,92 @@ public final class WrappedPacketOutAbilities extends WrappedPacket implements Se
         this.walkSpeed = walkSpeed;
     }
 
-    @Override
-    protected void setup() {
-        try {
-            this.vulnerable = Reflection.getField(packetClass, boolean.class, 0).getBoolean(packet);
-            this.flying = Reflection.getField(packetClass, boolean.class, 1).getBoolean(packet);
-            this.allowFlight = Reflection.getField(packetClass, boolean.class, 2).getBoolean(packet);
-            this.instantBuild = Reflection.getField(packetClass, boolean.class, 3).getBoolean(packet);
+    public static void load() {
+        packetClass = PacketTypeClasses.Server.ABILITIES;
 
-            this.flySpeed = Reflection.getField(packetClass, float.class, 0).getFloat(packet);
-            this.walkSpeed = Reflection.getField(packetClass, float.class, 0).getFloat(packet);
-        } catch (IllegalAccessException e) {
+        try {
+            packetConstructor = packetClass.getConstructor(PlayerAbilitiesUtils.playerAbilitiesClass);
+        } catch (NoSuchMethodException e) {
             e.printStackTrace();
         }
-
     }
 
+    /**
+     * Should the client be vulnerable?
+     *
+     * @return Is Vulnerable
+     */
     public boolean isVulnerable() {
-        return vulnerable;
+        if (isListening) {
+            return readBoolean(0);
+        } else {
+            return vulnerable;
+        }
     }
 
+    /**
+     * Should the client be flying?
+     *
+     * @return Is Flying
+     */
     public boolean isFlying() {
-        return flying;
+        if (isListening) {
+            return readBoolean(1);
+        } else {
+            return flying;
+        }
     }
 
+    /**
+     * Should the client be allowed to fly?
+     *
+     * @return Is Allowed To Fly
+     */
     public boolean isFlightAllowed() {
-        return allowFlight;
+        if (isListening) {
+            return readBoolean(2);
+        } else {
+            return allowFlight;
+        }
     }
 
+    /**
+     * Should the client be able to build instantly?
+     *
+     * @return Is Allowed To Build Instantly
+     */
     public boolean canInstantlyBuild() {
-        return instantBuild;
+        if (isListening) {
+            return readBoolean(3);
+        } else {
+            return instantBuild;
+        }
     }
 
+    /**
+     * Get the client's defined fly speed.
+     *
+     * @return Get Fly Speed
+     */
     public float getFlySpeed() {
-        return flySpeed;
+        if (isListening) {
+            return readFloat(0);
+        } else {
+            return flySpeed;
+        }
     }
 
+    /**
+     * Get the client's defined walk speed.
+     *
+     * @return Get Walk Speed
+     */
     public float getWalkSpeed() {
-        return walkSpeed;
+        if (isListening) {
+            return readFloat(1);
+        } else {
+            return walkSpeed;
+        }
     }
 
     @Override

src/main/java/io/github/retrooper/packetevents/packetwrappers/out/animation/WrappedPacketOutAnimation.java

@@ -1,22 +1,65 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.out.animation;
 
-import io.github.retrooper.packetevents.enums.minecraft.EntityAnimationType;
-import io.github.retrooper.packetevents.packetwrappers.Sendable;
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.SendableWrapper;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
 import org.bukkit.entity.Entity;
 
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
+import java.util.HashMap;
 
-public final class WrappedPacketOutAnimation extends WrappedPacket implements Sendable {
+public final class WrappedPacketOutAnimation extends WrappedPacket implements SendableWrapper {
     private static Class<?> animationClass, nmsEntityClass;
     private static Constructor<?> animationConstructor;
 
-    static {
+    private static final HashMap<Integer, EntityAnimationType> cachedAnimationIDS = new HashMap<Integer, EntityAnimationType>();
+    private static final HashMap<EntityAnimationType, Integer> cachedAnimations = new HashMap<EntityAnimationType, Integer>();
+    private Entity entity;
+    private int entityID = -1;
+    private EntityAnimationType type;
+    private boolean isListening = false;
+
+    public WrappedPacketOutAnimation(final Object packet) {
+        super(packet);
+        isListening = true;
+    }
+
+    public WrappedPacketOutAnimation(final Entity target, final EntityAnimationType type) {
+        super();
+        this.entityID = target.getEntityId();
+        this.entity = target;
+        this.type = type;
+    }
+
+    public static void load() {
+        animationClass = PacketTypeClasses.Server.ANIMATION;
         try {
-            animationClass = NMSUtils.getNMSClass("PacketPlayOutAnimation");
             nmsEntityClass = NMSUtils.getNMSClass("Entity");
         } catch (ClassNotFoundException e) {
             e.printStackTrace();
@@ -27,53 +70,64 @@ public final class WrappedPacketOutAnimation extends WrappedPacket implements Se
         } catch (NoSuchMethodException e) {
             e.printStackTrace();
         }
+        cachedAnimationIDS.put(0, EntityAnimationType.SWING_MAIN_ARM);
+        cachedAnimationIDS.put(1, EntityAnimationType.TAKE_DAMAGE);
+        cachedAnimationIDS.put(2, EntityAnimationType.LEAVE_BED);
+        cachedAnimationIDS.put(3, EntityAnimationType.SWING_OFFHAND);
+        cachedAnimationIDS.put(4, EntityAnimationType.CRITICAL_EFFECT);
+        cachedAnimationIDS.put(5, EntityAnimationType.MAGIC_CRITICAL_EFFECT);
+
+        cachedAnimations.put(EntityAnimationType.SWING_MAIN_ARM, 0);
+        cachedAnimations.put(EntityAnimationType.TAKE_DAMAGE, 1);
+        cachedAnimations.put(EntityAnimationType.LEAVE_BED, 2);
+        cachedAnimations.put(EntityAnimationType.SWING_OFFHAND, 3);
+        cachedAnimations.put(EntityAnimationType.CRITICAL_EFFECT, 4);
+        cachedAnimations.put(EntityAnimationType.MAGIC_CRITICAL_EFFECT, 5);
     }
 
-    private Entity entity;
-    private int entityID;
-    private EntityAnimationType type;
-
-    public WrappedPacketOutAnimation(final Object packet) {
-        super(packet);
-    }
-
-    public WrappedPacketOutAnimation(final Entity target, final EntityAnimationType type) {
-        super();
-        this.entityID = target.getEntityId();
-        this.entity = target;
-        this.type = type;
-    }
-
-    @Override
-    protected void setup() {
-        try {
-            //a - ID
-            //b - TYPE
-            this.entityID = Reflection.getField(animationClass, int.class, 0).getInt(packet);
-            this.entity = NMSUtils.getEntityById(this.entityID);
-            this.type = EntityAnimationType.get(Reflection.getField(animationClass, int.class, 1).getInt(packet));
-        } catch (IllegalAccessException e) {
-            e.printStackTrace();
-        }
-
-    }
-
+    /**
+     * Lookup the associated entity by the ID that was sent in the packet.
+     *
+     * @return Entity
+     */
     public Entity getEntity() {
-        return this.entity;
+        if (entity != null) {
+            return entity;
+        }
+        return entity = NMSUtils.getEntityById(getEntityId());
     }
 
+    /**
+     * Get the ID of the entity.
+     * If you do not want to use {@link #getEntity()},
+     * you lookup the entity by yourself with this entity ID.
+     *
+     * @return Entity ID
+     */
     public int getEntityId() {
-        return this.entityID;
+        if (entityID == -1) {
+            entityID = readInt(0);
+        }
+        return entityID;
     }
 
+    /**
+     * Get the entity animation type.
+     *
+     * @return Get Entity Animation Type
+     */
     public EntityAnimationType getAnimationType() {
-        return type;
+        if (isListening) {
+            return cachedAnimationIDS.get(readInt(1));
+        } else {
+            return type;
+        }
     }
 
     @Override
     public Object asNMSPacket() {
         final Object nmsEntity = NMSUtils.getNMSEntity(this.entity);
-        final int index = type.getIndex();
+        final int index = cachedAnimations.get(type);
         try {
             return animationConstructor.newInstance(nmsEntity, index);
         } catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {
@@ -81,4 +135,8 @@ public final class WrappedPacketOutAnimation extends WrappedPacket implements Se
         }
         return null;
     }
+
+    public enum EntityAnimationType {
+        SWING_MAIN_ARM, TAKE_DAMAGE, LEAVE_BED, SWING_OFFHAND, CRITICAL_EFFECT, MAGIC_CRITICAL_EFFECT
+    }
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/out/chat/WrappedPacketOutChat.java

@@ -1,20 +1,97 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.out.chat;
 
-import io.github.retrooper.packetevents.packetwrappers.Sendable;
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.annotations.Beta;
+import io.github.retrooper.packetevents.annotations.NotNull;
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.SendableWrapper;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.reflection.Reflection;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.github.retrooper.packetevents.utils.reflection.SubclassUtil;
 
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.HashMap;
+import java.util.UUID;
 
-public final class WrappedPacketOutChat extends WrappedPacket implements Sendable {
+/**
+ * This wrapper MIGHT not be stable
+ */
+@Beta
+public final class WrappedPacketOutChat extends WrappedPacket implements SendableWrapper {
     private static Constructor<?> chatClassConstructor;
-    private static Class<?> chatClass, iChatBaseComponentClass, chatSerializerClass;
+    private static Class<?> packetClass, iChatBaseComponentClass, chatSerializerClass, chatMessageTypeEnum;
+    private static Method chatMessageTypeCreatorMethod;
+    //0 = IChatBaseComponent, Byte
+    //1 = IChatBaseComponent, Int
+    //2 = IChatBaseComponent, ChatMessageType
+    //3 = IChatBaseComponent, ChatMessageType, UUID
+    private static byte constructorMode;
 
-    static {
+    //0 = Byte
+    //1 = Byte, Boolean
+    private static byte chatTypeMessageEnumConstructorMode;
+    private static final HashMap<ChatPosition, Byte> cachedChatPositions = new HashMap<ChatPosition, Byte>();
+    private static final HashMap<Byte, ChatPosition> cachedChatPositionIntegers = new HashMap<Byte, ChatPosition>();
+    private static final HashMap<String, Byte> cachedChatMessageTypeIntegers = new HashMap<String, Byte>();
+    private String message;
+    private ChatPosition chatPosition;
+    private UUID uuid;
+    private boolean isListening = false;
+
+    @Deprecated
+    public WrappedPacketOutChat(String message) {
+        this(message, null);
+    }
+
+    public WrappedPacketOutChat(final Object packet) {
+        super(packet);
+        isListening = true;
+    }
+
+    public WrappedPacketOutChat(String message, UUID uuid) {
+        this(message, ChatPosition.CHAT, uuid);
+    }
+
+    public WrappedPacketOutChat(String message, ChatPosition chatPosition, UUID uuid) {
+        this.uuid = uuid;
+        this.message = message;
+        this.chatPosition = chatPosition;
+    }
+
+    public enum ChatPosition {
+        CHAT, SYSTEM_MESSAGE, GAME_INFO
+    }
+
+
+    public static void load() {
         try {
-            chatClass = NMSUtils.getNMSClass("PacketPlayOutChat");
+            packetClass = PacketTypeClasses.Server.CHAT;
             iChatBaseComponentClass = NMSUtils.getNMSClass("IChatBaseComponent");
         } catch (ClassNotFoundException e) {
             e.printStackTrace();
@@ -25,27 +102,65 @@ public final class WrappedPacketOutChat extends WrappedPacket implements Sendabl
             chatSerializerClass = NMSUtils.getNMSClass("ChatSerializer");
         } catch (ClassNotFoundException e) {
             //That is fine, it is probably a subclass
-            chatSerializerClass = Reflection.getSubClass(iChatBaseComponentClass, "ChatSerializer");
+            chatSerializerClass = SubclassUtil.getSubClass(iChatBaseComponentClass, "ChatSerializer");
         }
 
+
+        boolean isVeryOutdated = false;
         try {
-            chatClassConstructor = chatClass.getConstructor(iChatBaseComponentClass);
-        } catch (NoSuchMethodException e) {
-            e.printStackTrace();
+            chatMessageTypeEnum = NMSUtils.getNMSClass("ChatMessageType");
+        } catch (ClassNotFoundException e) {
+            isVeryOutdated = true;
         }
 
+        if (!isVeryOutdated) {
+            chatMessageTypeCreatorMethod = Reflection.getMethod(chatMessageTypeEnum, 0, byte.class);
+
+            try {
+                chatClassConstructor = packetClass.getConstructor(iChatBaseComponentClass, chatMessageTypeEnum);
+                constructorMode = 2;
+            } catch (NoSuchMethodException e) {
+                //Just a much newer version(1.16.x and above right now)
+                try {
+                    chatClassConstructor = packetClass.getConstructor(iChatBaseComponentClass, chatMessageTypeEnum, UUID.class);
+                    constructorMode = 3;
+                } catch (NoSuchMethodException e2) {
+                    //Failed to resolve the constructor
+                    e2.printStackTrace();
+                }
+            }
+        } else {
+            try {
+                chatClassConstructor = packetClass.getConstructor(iChatBaseComponentClass, byte.class);
+                constructorMode = 0;
+            } catch (NoSuchMethodException e) {
+                //That is fine, they are most likely on an older version.
+                try {
+                    chatClassConstructor = packetClass.getConstructor(iChatBaseComponentClass, int.class);
+                    constructorMode = 1;
+                } catch (NoSuchMethodException e2) {
+                    e2.printStackTrace();
+                }
+            }
+        }
+
+        cachedChatPositions.put(ChatPosition.CHAT, (byte) 0);
+        cachedChatPositions.put(ChatPosition.SYSTEM_MESSAGE, (byte) 1);
+        cachedChatPositions.put(ChatPosition.GAME_INFO, (byte) 2);
+
+        cachedChatPositionIntegers.put((byte) 0, ChatPosition.CHAT);
+        cachedChatPositionIntegers.put((byte) 1, ChatPosition.SYSTEM_MESSAGE);
+        cachedChatPositionIntegers.put((byte) 2, ChatPosition.GAME_INFO);
+
+
+        cachedChatMessageTypeIntegers.put("CHAT", (byte) 0);
+        cachedChatMessageTypeIntegers.put("SYSTEM", (byte) 1);
+        cachedChatMessageTypeIntegers.put("GAME_INFO", (byte) 2);
 
     }
 
-    private String message;
-
-    public WrappedPacketOutChat(final Object packet) {
-        super(packet);
-    }
-
-    public WrappedPacketOutChat(final String message) {
-        super();
-        this.message = "{\"text\": \"" + message + "\"}";
+    public static String fromStringToJSON(String message) {
+        return "{\"text\": \"" + message + "\"}";
     }
 
     public static String toStringFromIChatBaseComponent(Object obj) {
@@ -66,32 +181,107 @@ public final class WrappedPacketOutChat extends WrappedPacket implements Sendabl
         return null;
     }
 
-
-    @Override
-    protected void setup() {
-        try {
-            final Object iChatBaseObj = Reflection.getField(chatClass, iChatBaseComponentClass, 0).get(packet);
-
-            final Object contentString = Reflection.getMethod(iChatBaseComponentClass, String.class, 0).invoke(iChatBaseObj);
-
-            this.message = contentString.toString();
-        } catch (IllegalAccessException | InvocationTargetException e) {
-            e.printStackTrace();
-        }
-    }
-
     @Override
     public Object asNMSPacket() {
-        try {
-            return chatClassConstructor.newInstance(toIChatBaseComponent(this.message));
-        } catch (InstantiationException | InvocationTargetException | IllegalAccessException e) {
-            e.printStackTrace();
+        int integerChatPos = cachedChatPositions.get(chatPosition);
+        Object chatMessageTypeInstance = null;
+        if (chatMessageTypeEnum != null) {
+            if (chatTypeMessageEnumConstructorMode == 0) {
+                try {
+                    chatMessageTypeInstance = chatMessageTypeCreatorMethod.invoke(null, (byte) integerChatPos);
+                } catch (IllegalAccessException | InvocationTargetException e) {
+                    e.printStackTrace();
+                }
+            } else if (chatTypeMessageEnumConstructorMode == 1) {
+                try {
+                    chatMessageTypeInstance = chatMessageTypeCreatorMethod.invoke(null, (byte) integerChatPos);
+                } catch (IllegalAccessException | InvocationTargetException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+        switch (constructorMode) {
+            case 0:
+                try {
+                    return chatClassConstructor.newInstance(toIChatBaseComponent(this.message), (byte) integerChatPos);
+                } catch (InstantiationException | InvocationTargetException | IllegalAccessException e) {
+                    e.printStackTrace();
+                }
+                break;
+            case 1:
+                try {
+                    return chatClassConstructor.newInstance(toIChatBaseComponent(this.message), integerChatPos);
+                } catch (InstantiationException | InvocationTargetException | IllegalAccessException e) {
+                    e.printStackTrace();
+                }
+                break;
+            case 2:
+                try {
+                    return chatClassConstructor.newInstance(toIChatBaseComponent(this.message), chatMessageTypeInstance);
+                } catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {
+                    e.printStackTrace();
+                }
+                break;
+            case 3:
+                try {
+                    return chatClassConstructor.newInstance(toIChatBaseComponent(this.message), chatMessageTypeInstance, uuid);
+                } catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {
+                    e.printStackTrace();
+                }
+                break;
         }
-
         return null;
     }
 
+    /**
+     * Get the message.
+     * @return Get String Message
+     */
     public String getMessage() {
-        return this.message;
+        if(isListening) {
+            final Object iChatBaseObj = readObject(0, iChatBaseComponentClass);
+
+            try {
+                Object contentString = Reflection.getMethod(iChatBaseComponentClass, String.class, 0).invoke(iChatBaseObj);
+                return contentString.toString();
+            } catch (IllegalAccessException | InvocationTargetException e) {
+                e.printStackTrace();
+            }
+            return null;
+        }
+        else {
+            return message;
+        }
     }
+
+    /**
+     * Get the chat position.
+     *
+     * On 1.7.10, Only CHAT and SYSTEM_MESSAGE exist.
+     * If an invalid chat position is sent, it will be defaulted it to CHAT.
+     * @return ChatPosition
+     */
+    public ChatPosition getChatPosition() {
+        if(isListening) {
+            byte chatPosInteger = 0;
+            switch (constructorMode) {
+                case 0:
+                    chatPosInteger = readByte(0);
+                    break;
+                case 1:
+                    chatPosInteger = (byte) readInt(0);
+                    break;
+                case 2:
+                case 3:
+                    Object chatTypeEnumInstance = readObject(0, chatMessageTypeEnum);
+                    chatPosInteger = cachedChatMessageTypeIntegers.get(chatTypeEnumInstance.toString());
+                    break;
+            }
+            return cachedChatPositionIntegers.get(chatPosInteger);
+        }
+        else {
+            return chatPosition;
+        }
+    }
+
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/out/custompayload/WrappedPacketOutCustomPayload.java

@@ -0,0 +1,227 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers.out.custompayload;
+
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.SendableWrapper;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.bytebuf.ByteBufUtil;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Modifier;
+
+public class WrappedPacketOutCustomPayload extends WrappedPacket implements SendableWrapper {
+    private static Class<?> packetClass;
+    private static Constructor<?> constructor;
+    private static Constructor<?> packetDataSerializerConstructor;
+    private static Constructor<?> minecraftKeyConstructor;
+    private static Class<?> byteBufClass;
+    private static Class<?> packetDataSerializerClass;
+    private static Class<?> minecraftKeyClass;
+    private static int minecraftKeyIndexInClass;
+
+    private static byte constructorMode = 0;
+    private boolean isListening = false;
+
+    public static void load() {
+        packetClass = PacketTypeClasses.Server.CUSTOM_PAYLOAD;
+        packetDataSerializerClass = NMSUtils.getNMSClassWithoutException("PacketDataSerializer");
+        minecraftKeyClass = NMSUtils.getNMSClassWithoutException("MinecraftKey");
+
+        try {
+            byteBufClass = NMSUtils.getNettyClass("buffer.ByteBuf");
+        } catch (ClassNotFoundException e) {
+
+        }
+        try {
+            packetDataSerializerConstructor = packetDataSerializerClass.getConstructor(byteBufClass);
+        } catch (NullPointerException e) {
+            //Nothing
+        } catch (NoSuchMethodException e) {
+            //also nothing
+        }
+
+        try {
+            if (minecraftKeyClass != null) {
+                minecraftKeyConstructor = minecraftKeyClass.getConstructor(String.class);
+            }
+        } catch (NoSuchMethodException e) {
+            //Nothing
+        }
+
+        //Constructors:
+
+        //String, byte[]
+
+        //String, PacketDataSerializer
+
+        //MinecraftKey, PacketDataSerializer
+        try {
+            //1.7 constructor
+            constructor = packetClass.getConstructor(String.class, byte[].class);
+            constructorMode = 0;
+        } catch (NoSuchMethodException e) {
+            //That's fine, just a newer version
+            try {
+                constructor = packetClass.getConstructor(String.class, packetDataSerializerClass);
+                constructorMode = 1;
+            } catch (NoSuchMethodException e2) {
+                //That's fine, just an even newer version
+                try {
+                    //Minecraft key exists
+
+                    for (int i = 0; i < packetClass.getDeclaredFields().length; i++) {
+                        Field f = packetClass.getDeclaredFields()[i];
+                        if (!Modifier.isStatic(f.getModifiers())) {
+                            minecraftKeyIndexInClass = i;
+                            break;
+                        }
+                    }
+                    constructor = packetClass.getConstructor(minecraftKeyClass, packetDataSerializerClass);
+                    constructorMode = 2;
+                } catch (NoSuchMethodException e3) {
+                    throw new IllegalStateException("PacketEvents is unable to resolve the PacketPlayOutCustomPayload constructor.");
+                }
+            }
+        }
+    }
+
+    private String tag;
+    private byte[] data;
+
+    public WrappedPacketOutCustomPayload(String tag, byte[] data) {
+        this.tag = tag;
+        this.data = data;
+    }
+
+
+    public WrappedPacketOutCustomPayload(Object packet) {
+        super(packet);
+        isListening = true;
+    }
+
+    @Override
+    protected void setup() {
+        switch (constructorMode) {
+            case 0:
+                this.tag = readString(0);
+                this.data = readByteArray(0);
+                break;
+            case 1:
+                this.tag = readString(0);
+                Object dataSerializer = readObject(0, packetDataSerializerClass);
+                WrappedPacket byteBufWrapper = new WrappedPacket(dataSerializer);
+
+                Object byteBuf = byteBufWrapper.readObject(0, byteBufClass);
+
+                this.data = ByteBufUtil.getBytes(byteBuf);
+                break;
+            case 2:
+                Object minecraftKey = readObject(minecraftKeyIndexInClass, minecraftKeyClass);
+                WrappedPacket minecraftKeyWrapper = new WrappedPacket(minecraftKey);
+                this.tag = minecraftKeyWrapper.readString(1);
+                Object dataSerializer2 = readObject(0, packetDataSerializerClass);
+                WrappedPacket byteBuf2Wrapper = new WrappedPacket(dataSerializer2);
+                Object byteBuf2 = byteBuf2Wrapper.readObject(0, byteBufClass);
+                this.data = ByteBufUtil.getBytes(byteBuf2);
+                break;
+        }
+    }
+
+    public String getTag() {
+        if(isListening) {
+            switch(constructorMode) {
+                case 0:
+                case 1:
+                    return readString(0);
+                case 2:
+                    Object minecraftKey = readObject(minecraftKeyIndexInClass, minecraftKeyClass);
+                    WrappedPacket minecraftKeyWrapper = new WrappedPacket(minecraftKey);
+                    return minecraftKeyWrapper.readString(1);
+            }
+        }
+        else {
+            return tag;
+        }
+        return null;
+    }
+
+    public byte[] getData() {
+        if(isListening) {
+            switch(constructorMode) {
+                case 0:
+                    return readByteArray(0);
+                case 1:
+                case 2:
+                    Object dataSerializer = readObject(0, packetDataSerializerClass);
+                    WrappedPacket byteBufWrapper = new WrappedPacket(dataSerializer);
+
+                    Object byteBuf = byteBufWrapper.readObject(0, byteBufClass);
+
+                    return ByteBufUtil.getBytes(byteBuf);
+            }
+        }
+        else {
+            return data;
+        }
+        return null;
+    }
+
+    @Override
+    public Object asNMSPacket() {
+        Object byteBufObject = ByteBufUtil.copiedBuffer(data);
+        switch (constructorMode) {
+            case 0:
+                try {
+                    return constructor.newInstance(tag, data);
+                } catch (InstantiationException | InvocationTargetException | IllegalAccessException e) {
+                    e.printStackTrace();
+                }
+                break;
+            case 1:
+                try {
+                    Object dataSerializer = packetDataSerializerConstructor.newInstance(byteBufObject);
+                    return constructor.newInstance(tag, dataSerializer);
+                } catch (InstantiationException | InvocationTargetException | IllegalAccessException e) {
+                    e.printStackTrace();
+                }
+                break;
+            case 2:
+
+                try {
+                    Object minecraftKey = minecraftKeyConstructor.newInstance(tag);
+                    Object dataSerializer = packetDataSerializerConstructor.newInstance(byteBufObject);
+                    return constructor.newInstance(minecraftKey, dataSerializer);
+                } catch (InstantiationException | InvocationTargetException | IllegalAccessException e) {
+                    e.printStackTrace();
+                }
+                break;
+        }
+        return null;
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/out/entity/WrappedPacketOutEntity.java

@@ -1,27 +1,88 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.out.entity;
 
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.SendableWrapper;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.github.retrooper.packetevents.utils.reflection.Reflection;
 import org.bukkit.entity.Entity;
 
+import java.lang.reflect.Constructor;
 import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
 
-public class WrappedPacketOutEntity extends WrappedPacket {
+public class WrappedPacketOutEntity extends WrappedPacket implements SendableWrapper {
     private static Class<?> packetClass;
+    //Byte = 1.7.10->1.8.8, Int = 1.9->1.15.x, Short = 1.16.x
     private static byte mode = 0; //byte = 0, int = 1, short = 2
     private static double dXYZDivisor = 0.0;
+    private static int yawByteIndex = 0;
+    private static int pitchByteIndex = 1;
+    private Entity entity;
+    private boolean isListening = false;
+    private static Constructor<?> entityPacketConstructor;
+    private int entityID;
+    private double deltaX, deltaY, deltaZ;
+    private byte pitch, yaw;
+    private boolean onGround;
 
-    static {
-        try {
-            packetClass = NMSUtils.getNMSClass("PacketPlayOutEntity");
-        } catch (ClassNotFoundException e) {
-            e.printStackTrace();
-        }
+    public WrappedPacketOutEntity(Object packet) {
+        super(packet);
+        isListening = true;
+    }
+
+    public WrappedPacketOutEntity(int entityID, double deltaX, double deltaY, double deltaZ,
+                                  byte pitch, byte yaw, boolean onGround) {
+        this.entityID = entityID;
+        this.deltaX = deltaX;
+        this.deltaY = deltaY;
+        this.deltaZ = deltaZ;
+        this.pitch = pitch;
+        this.yaw = yaw;
+        this.onGround = onGround;
+        //Get entity player then pass it into the packetplayoutnamedentityspawn!
+      //  net.minecraft.server.v1_7_R4.EntityPlayer cp = null;
+        //net.minecraft.server.v1_7_R4.PacketPlayOutNamedEntitySpawn es = new net.minecraft.server.v1_7_R4.PacketPlayOutNamedEntitySpawn(cp);
+    }
+
+    public WrappedPacketOutEntity(Entity entity, double deltaX, double deltaY, double deltaZ,
+                                  byte pitch, byte yaw, boolean onGround) {
+        this(entity.getEntityId(), deltaX, deltaY, deltaZ, pitch, yaw, onGround);
+    }
+
+    public static void load() {
+        packetClass = PacketTypeClasses.Server.ENTITY;
 
         Field dxField = Reflection.getField(packetClass, 1);
+        assert dxField != null;
         if (dxField.equals(Reflection.getField(packetClass, byte.class, 0))) {
             mode = 0;
+            yawByteIndex = 3;
+            pitchByteIndex = 4;
         } else if (dxField.equals(Reflection.getField(packetClass, int.class, 1))) {
             mode = 1;
         } else if (dxField.equals(Reflection.getField(packetClass, short.class, 0))) {
@@ -33,87 +94,172 @@ public class WrappedPacketOutEntity extends WrappedPacket {
         } else {
             dXYZDivisor = 4096.0;
         }
-
-    }
-
-    private int entityID;
-    private double deltaX, deltaY, deltaZ;
-    private byte yaw, pitch;
-    private boolean onGround;
-
-
-    public WrappedPacketOutEntity(Object packet) {
-        super(packet);
-    }
-
-    @Override
-    protected void setup() {
         try {
-            this.entityID = Reflection.getField(packetClass, int.class, 0).getInt(packet);
-            this.onGround = Reflection.getField(packetClass, boolean.class, 0).getBoolean(packet);
-            int dX = 1, dY = 1, dZ = 1;
-
-            switch (mode) {
-                case 0:
-                    dX = Reflection.getField(packetClass, byte.class, 0).getByte(packet);
-                    dY = Reflection.getField(packetClass, byte.class, 1).getByte(packet);
-                    dZ = Reflection.getField(packetClass, byte.class, 2).getByte(packet);
-                    this.yaw = Reflection.getField(packetClass, byte.class, 3).getByte(packet);
-                    this.pitch = Reflection.getField(packetClass, byte.class, 4).getByte(packet);
-                    break;
-                case 1:
-                    dX = Reflection.getField(packetClass, int.class, 1).getInt(packet);
-                    dY = Reflection.getField(packetClass, int.class, 2).getInt(packet);
-                    dZ = Reflection.getField(packetClass, int.class, 3).getInt(packet);
-                    this.yaw = Reflection.getField(packetClass, byte.class, 0).getByte(packet);
-                    this.pitch = Reflection.getField(packetClass, byte.class, 1).getByte(packet);
-                    break;
-                case 2:
-                    dX = Reflection.getField(packetClass, short.class, 0).getShort(packet);
-                    dY = Reflection.getField(packetClass, short.class, 1).getShort(packet);
-                    dZ = Reflection.getField(packetClass, short.class, 2).getShort(packet);
-                    this.yaw = Reflection.getField(packetClass, byte.class, 0).getByte(packet);
-                    this.pitch = Reflection.getField(packetClass, byte.class, 1).getByte(packet);
-                    break;
-            }
-            this.deltaX = dX / dXYZDivisor;
-            this.deltaY = dY / dXYZDivisor;
-            this.deltaZ = dZ / dXYZDivisor;
-        } catch (IllegalAccessException e) {
+            entityPacketConstructor = packetClass.getConstructor(int.class);
+        } catch (NoSuchMethodException e) {
             e.printStackTrace();
         }
 
     }
 
+    /**
+     * Get the pitch.
+     *
+     * @return Get Byte Pitch
+     */
     public byte getPitch() {
-        return pitch;
+        if (isListening) {
+            return readByte(pitchByteIndex);
+        } else {
+            return pitch;
+        }
     }
 
+    /**
+     * Get the Yaw.
+     *
+     * @return Get Byte Yaw
+     */
     public byte getYaw() {
-        return yaw;
-    }
-
-    public double getDeltaZ() {
-        return deltaZ;
-    }
-
-    public double getDeltaY() {
-        return deltaY;
+        if (isListening) {
+            return readByte(yawByteIndex);
+        } else {
+            return yaw;
+        }
     }
 
+    /**
+     * Get the Delta X
+     *
+     * @return Delta X
+     */
     public double getDeltaX() {
-        return deltaX;
+        if (isListening) {
+            switch (mode) {
+                case 0:
+                    return readByte(0) / dXYZDivisor;
+                case 1:
+                    return readInt(1) / dXYZDivisor;
+                case 2:
+                    return readShort(0) / dXYZDivisor;
+            }
+        } else {
+            return deltaX;
+        }
+        return 0.0;
     }
 
+    /**
+     * Get the Delta Y
+     *
+     * @return Delta Y
+     */
+    public double getDeltaY() {
+        if (isListening) {
+            switch (mode) {
+                case 0:
+                    return readByte(1) / dXYZDivisor;
+                case 1:
+                    return readInt(2) / dXYZDivisor;
+                case 2:
+                    return readShort(1) / dXYZDivisor;
+            }
+        } else {
+            return deltaY;
+        }
+        return 0.0;
+    }
+
+    /**
+     * Get the Delta Z
+     *
+     * @return Delta Z
+     */
+    public double getDeltaZ() {
+        if (isListening) {
+            switch (mode) {
+                case 0:
+                    return readByte(2) / dXYZDivisor;
+                case 1:
+                    return readInt(3) / dXYZDivisor;
+                case 2:
+                    return readShort(2) / dXYZDivisor;
+            }
+        } else {
+            return deltaZ;
+        }
+        return 0.0;
+    }
+
+    /**
+     * Lookup the associated entity by the ID that was sent in the packet.
+     *
+     * @return Entity
+     */
     public Entity getEntity() {
-        return NMSUtils.getEntityById(entityID);
+        if (entity != null) {
+            return entity;
+        }
+        return entity = NMSUtils.getEntityById(getEntityId());
     }
 
+    /**
+     * Get the ID of the entity.
+     * If you do not want to use {@link #getEntity()},
+     * you lookup the entity by yourself with this entity ID.
+     *
+     * @return Entity ID
+     */
     public int getEntityId() {
-        return entityID;
+        if (entityID != -1) {
+            return entityID;
+        } else {
+            return entityID = readInt(0);
+        }
     }
 
+    /**
+     * Is the entity on the ground?
+     *
+     * @return On Ground
+     */
     public boolean isOnGround() {
-        return onGround;
+        if (isListening) {
+            return readBoolean(0);
+        } else {
+            return onGround;
+        }
+    }
+
+    @Override
+    public Object asNMSPacket() {
+        try {
+            Object packetInstance = entityPacketConstructor.newInstance(entityID);
+            WrappedPacket wrapper = new WrappedPacket(packetInstance);
+            switch(mode) {
+                case 0:
+                    wrapper.writeByte(0, (byte)(deltaX * dXYZDivisor));
+                    wrapper.writeByte(1, (byte)(deltaY * dXYZDivisor));
+                    wrapper.writeByte(2, (byte)(deltaZ * dXYZDivisor));
+                    break;
+                case 1:
+                    wrapper.writeInt(1, (int)(deltaX * dXYZDivisor));
+                    wrapper.writeInt(2, (int)(deltaY * dXYZDivisor));
+                    wrapper.writeInt(3, (int)(deltaZ * dXYZDivisor));
+                    break;
+                case 2:
+                    wrapper.writeShort(0, (short)(deltaX * dXYZDivisor));
+                    wrapper.writeShort(1, (short)(deltaY * dXYZDivisor));
+                    wrapper.writeShort(2, (short)(deltaZ * dXYZDivisor));
+                    break;
+            }
+            wrapper.writeByte(yawByteIndex, yaw);
+            wrapper.writeByte(pitchByteIndex, pitch);
+            wrapper.writeBoolean(0, onGround);
+            return packetInstance;
+        } catch (InstantiationException | InvocationTargetException | IllegalAccessException e) {
+            e.printStackTrace();
+        }
+        return null;
     }
 }

src/main/java/io/github/retrooper/packetevents/packetwrappers/out/entitymetadata/WrappedPacketOutEntityMetadata.java

@@ -0,0 +1,44 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers.out.entitymetadata;
+
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+
+public class WrappedPacketOutEntityMetadata extends WrappedPacket {
+    private boolean isListening = false;
+    private int entityID;
+    public WrappedPacketOutEntityMetadata(Object packet) {
+        super(packet);
+        isListening = true;
+    }
+
+    public int getEntityId() {
+        if (isListening) {
+            return readInt(0);
+        } else {
+            return entityID;
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/out/entitystatus/WrappedPacketOutEntityStatus.java

@@ -0,0 +1,103 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers.out.entitystatus;
+
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.SendableWrapper;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import org.bukkit.entity.Entity;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+
+public class WrappedPacketOutEntityStatus extends WrappedPacket implements SendableWrapper {
+    private static Constructor<?> packetConstructor;
+
+    public static void load() {
+        try {
+            packetConstructor =
+                    PacketTypeClasses.Server.ENTITY_STATUS.getConstructor(NMSUtils.nmsEntityClass, byte.class);
+        } catch (NoSuchMethodException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private Entity entity;
+    private byte status;
+    private int entityID = -1;
+
+    public WrappedPacketOutEntityStatus(Object packet) {
+        super(packet);
+    }
+
+    public WrappedPacketOutEntityStatus(Entity entity, byte status) {
+        this.entityID = entity.getEntityId();
+        this.entity = entity;
+        this.status = status;
+    }
+
+    public WrappedPacketOutEntityStatus(int entityID, byte status) {
+        this.entityID = entityID;
+        this.status = status;
+    }
+
+    public int getEntityId() {
+        if (packet == null) {
+            if (entityID != -1) {
+                return entityID;
+            }
+            return entityID = readInt(0);
+        } else {
+            return entityID;
+        }
+    }
+
+    public Entity getEntity() {
+        if (entity == null) {
+            return entity = NMSUtils.getEntityById(getEntityId());
+        }
+        return entity;
+    }
+
+    public byte getEntityStatus() {
+        if (packet == null) {
+            return status;
+        } else {
+            return readByte(0);
+        }
+    }
+
+    @Override
+    public Object asNMSPacket() {
+        try {
+            return packetConstructor.newInstance(NMSUtils.getNMSEntity(getEntity()), status);
+        } catch (InstantiationException | InvocationTargetException
+                | IllegalAccessException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/out/entityteleport/WrappedPacketOutEntityTeleport.java

@@ -0,0 +1,219 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers.out.entityteleport;
+
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.SendableWrapper;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import org.bukkit.Location;
+import org.bukkit.entity.Entity;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+
+public class WrappedPacketOutEntityTeleport extends WrappedPacket implements SendableWrapper {
+    private static boolean legacyVersionMode = false;
+    private static boolean ultraLegacyVersionMode = false;
+    private boolean listeningMode = false;
+    private static final float rotationMultiplier = 256.0F / 360.0F;
+    private static Constructor<?> constructor;
+    private Entity entity = null;
+    private int entityID;
+    private double x, y, z;
+    private float yaw, pitch;
+    private boolean onGround;
+
+    public static void load() {
+        Class<?> packetClass = PacketTypeClasses.Server.ENTITY_TELEPORT;
+        try {
+            constructor = packetClass.getConstructor(int.class, int.class, int.class, int.class, byte.class, byte.class, boolean.class, boolean.class);
+            ultraLegacyVersionMode = true;
+            legacyVersionMode = true;
+        } catch (NoSuchMethodException e) {
+            try {
+                constructor = packetClass.getConstructor(int.class, int.class, int.class, int.class, byte.class, byte.class, boolean.class);
+                ultraLegacyVersionMode = false;
+                legacyVersionMode = true;
+            } catch (NoSuchMethodException e2) {
+                try {
+                    constructor = packetClass.getConstructor();
+                    ultraLegacyVersionMode = false;
+                    legacyVersionMode = false;
+                } catch (NoSuchMethodException e3) {
+                    e3.printStackTrace();
+                }
+            }
+
+        }
+    }
+
+    public WrappedPacketOutEntityTeleport(Object packet) {
+        super(packet);
+        listeningMode = true;
+    }
+
+    public WrappedPacketOutEntityTeleport(int entityID, Location loc, boolean onGround) {
+        this(entityID, loc.getX(), loc.getY(), loc.getZ(), loc.getYaw(), loc.getPitch(), onGround);
+    }
+
+    public WrappedPacketOutEntityTeleport(int entityID, double x, double y, double z, float yaw, float pitch, boolean onGround) {
+        this.entityID = entityID;
+        this.x = x;
+        this.y = y;
+        this.z = z;
+        this.yaw = yaw;
+        this.pitch = pitch;
+        this.onGround = onGround;
+    }
+
+    public Entity getEntity() {
+        if(entity == null) {
+            entity = NMSUtils.getEntityById(getEntityId());
+        }
+        return entity;
+    }
+
+    public int getEntityId() {
+        if (listeningMode) {
+            if (entityID != -1) {
+                return readInt(0);
+            } else {
+                return entityID = readInt(0);
+            }
+        } else {
+            return entityID;
+        }
+    }
+
+    public double getX() {
+        if (!listeningMode) {
+            return x;
+        } else {
+            if (legacyVersionMode) {
+                return readInt(1) / 32.0D;
+            } else {
+                return readDouble(0);
+            }
+        }
+    }
+
+    public double getY() {
+        if (!listeningMode) {
+            return y;
+        } else {
+            if (legacyVersionMode) {
+                return readInt(2) / 32.0D;
+            } else {
+                return readDouble(1);
+            }
+        }
+    }
+
+    public double getZ() {
+        if (!listeningMode) {
+            return z;
+        } else {
+            if (legacyVersionMode) {
+                return readInt(3) / 32.0D;
+            } else {
+                return readDouble(2);
+            }
+        }
+    }
+
+    public float getYaw() {
+        if (!listeningMode) {
+            return yaw;
+        } else {
+            return (readByte(0) / rotationMultiplier);
+        }
+    }
+
+    public boolean isOnGround() {
+        if (listeningMode) {
+            return readBoolean(0);
+        } else {
+            return onGround;
+        }
+    }
+
+    @Override
+    public Object asNMSPacket() {
+        if (ultraLegacyVersionMode) {
+            //1.7.10
+            try {
+                return constructor.newInstance(entityID, floor(x * 32.0D), floor(y * 32.0D), floor(z * 32.0D),
+                        (byte) ((int) yaw * rotationMultiplier), (byte) (int) (pitch * rotationMultiplier), false, false);
+            } catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {
+                e.printStackTrace();
+            }
+        } else if (legacyVersionMode) {
+            //1.8.x
+            try {
+                return constructor.newInstance(entityID, floor(x * 32.0D), floor(y * 32.0D), floor(z * 32.0D),
+                        (byte) ((int) yaw * rotationMultiplier), (byte) (int) (pitch * rotationMultiplier), false);
+            } catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {
+                e.printStackTrace();
+            }
+        } else {
+            //newer versions
+            Object instance = null;
+            try {
+                instance = constructor.newInstance();
+            } catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {
+                e.printStackTrace();
+            }
+
+            WrappedPacket instanceWrapper = new WrappedPacket(instance);
+            instanceWrapper.writeInt(0, entityID);
+            instanceWrapper.writeDouble(0, x);
+            instanceWrapper.writeDouble(1, y);
+            instanceWrapper.writeDouble(2, z);
+
+            instanceWrapper.writeByte(0, (byte) (yaw * rotationMultiplier));
+            instanceWrapper.writeByte(1, (byte) (pitch * rotationMultiplier));
+            if (onGround) {
+                //default value is false, so we can save a reflection call
+                instanceWrapper.writeBoolean(0, true);
+            }
+            return instance;
+        }
+        return null;
+    }
+
+    public float getPitch() {
+        if (listeningMode) {
+            return pitch;
+        } else {
+            return (readByte(1) / rotationMultiplier);
+        }
+    }
+
+    private static int floor(double value) {
+        int i = (int) value;
+        return value < (double) i ? i - 1 : i;
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/out/entityvelocity/WrappedPacketOutEntityVelocity.java

@@ -1,33 +1,81 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 retrooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 package io.github.retrooper.packetevents.packetwrappers.out.entityvelocity;
 
-import io.github.retrooper.packetevents.enums.ServerVersion;
-import io.github.retrooper.packetevents.packetwrappers.Sendable;
-import io.github.retrooper.packetevents.packetwrappers.api.WrappedPacket;
-import io.github.retrooper.packetevents.reflectionutils.Reflection;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.SendableWrapper;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.github.retrooper.packetevents.utils.server.ServerVersion;
 import org.bukkit.entity.Entity;
 
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
 
-public final class WrappedPacketOutEntityVelocity extends WrappedPacket implements Sendable {
+public final class WrappedPacketOutEntityVelocity extends WrappedPacket implements SendableWrapper {
     private static Constructor<?> velocityConstructor, vec3dConstructor;
     private static Class<?> velocityClass, vec3dClass;
+    private static boolean isVec3dPresent;
+    private int entityID = -1;
+    private double velocityX, velocityY, velocityZ;
+    private Entity entity;
+    private boolean isListening = false;
+
+    public WrappedPacketOutEntityVelocity(final Object packet) {
+        super(packet);
+        isListening = true;
+    }
+
+    public WrappedPacketOutEntityVelocity(final Entity entity, final double velocityX, final double velocityY, final double velocityZ) {
+        this.entityID = entity.getEntityId();
+        this.entity = entity;
+        this.velocityX = velocityX;
+        this.velocityY = velocityY;
+        this.velocityZ = velocityZ;
+    }
+
+    public WrappedPacketOutEntityVelocity(int entityID, double velX, double velY, double velZ) {
+        this.entityID = entityID;
+        this.velocityX = velX;
+        this.velocityY = velY;
+        this.velocityZ = velZ;
+    }
 
     /**
      * Velocity Constructor parameter types:
-     * 1.7.10->1.13.2 use int, double, double, double style,
+     * 1.7.10 -&gt; 1.13.2 use int, double, double, double style,
      * 1.14+ use int, Vec3D style
      */
-    static {
-        try {
-
-            velocityClass = NMSUtils.getNMSClass("PacketPlayOutEntityVelocity");
-            if (version.isHigherThan(ServerVersion.v_1_13_2)) {
+    public static void load() {
+        velocityClass = PacketTypeClasses.Server.ENTITY_VELOCITY;
+        if (version.isHigherThan(ServerVersion.v_1_13_2)) {
+            try {
                 vec3dClass = NMSUtils.getNMSClass("Vec3D");
+            } catch (ClassNotFoundException e) {
+                e.printStackTrace();
             }
-        } catch (ClassNotFoundException e) {
-            e.printStackTrace();
         }
 
         try {
@@ -36,6 +84,7 @@ public final class WrappedPacketOutEntityVelocity extends WrappedPacket implemen
             //That is fine, just a newer version
             try {
                 velocityConstructor = velocityClass.getConstructor(int.class, vec3dClass);
+                isVec3dPresent = true;
                 //vec3d constructor
                 vec3dConstructor = vec3dClass.getConstructor(double.class, double.class, double.class);
             } catch (NoSuchMethodException e2) {
@@ -45,75 +94,84 @@ public final class WrappedPacketOutEntityVelocity extends WrappedPacket implemen
         }
     }
 
-    private Entity entity;
-    private int entityId;
-    private double velocityX, velocityY, velocityZ;
-
-    public WrappedPacketOutEntityVelocity(final Object packet) {
-        super(packet);
+    /**
+     * Lookup the associated entity by the ID that was sent in the packet.
+     *
+     * @return Entity
+     */
+    public Entity getEntity() {
+        if (entity != null) {
+            return entity;
+        }
+        return entity = NMSUtils.getEntityById(getEntityId());
     }
 
-    public WrappedPacketOutEntityVelocity(final Entity entity, final double velocityX, final double velocityY, final double velocityZ) {
-        super();
-        this.entityId = entity.getEntityId();
-        this.entity = entity;
-        this.velocityX = velocityX;
-        this.velocityY = velocityY;
-        this.velocityZ = velocityZ;
+    /**
+     * Get the ID of the entity.
+     * If you do not want to use {@link #getEntity()},
+     * you lookup the entity by yourself with this entity ID.
+     *
+     * @return Entity ID
+     */
+    public int getEntityId() {
+        if (entityID != -1) {
+            return entityID;
+        }
+        return entityID = readInt(0);
     }
 
-    @Override
-    protected void setup() {
-        try {
-            int i = 0;
-            final int entityId = Reflection.getField(velocityClass, int.class, 0).getInt(packet);
-
-            final int x = Reflection.getField(velocityClass, int.class, 1).getInt(packet);
-            final int y = Reflection.getField(velocityClass, int.class, 2).getInt(packet);
-            final int z = Reflection.getField(velocityClass, int.class, 3).getInt(packet);
-
-            this.entityId = entityId;
-            this.entity = NMSUtils.getEntityById(this.entityId);
-
-            this.velocityX = x / 8000.0D;
-            this.velocityY = y / 8000.0D;
-            this.velocityZ = z / 8000.0D;
-        } catch (IllegalAccessException e) {
-            e.printStackTrace();
+    /**
+     * Get the Velocity X
+     *
+     * @return Get Velocity X
+     */
+    public double getVelocityX() {
+        if (isListening) {
+            return readInt(1) / 8000.0D;
+        } else {
+            return velocityX;
         }
     }
 
-    public int getEntityId() {
-        return entityId;
-    }
-
-    public Entity getEntity() {
-        return entity;
-    }
-
-    public double getVelocityX() {
-        return velocityX;
-    }
-
+    /**
+     * Get the Velocity Y
+     *
+     * @return Get Velocity Y
+     */
     public double getVelocityY() {
+        if(isListening) {
+        return readInt(2) / 8000.0D;
+    }
+    else {
         return velocityY;
+        }
     }
 
+    /**
+     * Get the Velocity Z
+     *
+     * @return Get Velocity Z
+     */
     public double getVelocityZ() {
+        if(isListening) {
+        return readInt(3) / 8000.0D;
+    }
+    else {
         return velocityZ;
+        }
     }
 
     @Override
     public Object asNMSPacket() {
-        if (version.isLowerThan(ServerVersion.v_1_14)) {
+        if (!isVec3dPresent) {
             try {
-                return velocityConstructor.newInstance(entityId, velocityX, velocityY, velocityZ);
+                return velocityConstructor.newInstance(entityID, velocityX, velocityY, velocityZ);
             } catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {
                 e.printStackTrace();
             }
         } else {
             try {
-                return velocityConstructor.newInstance(entityId, vec3dConstructor.newInstance(velocityX, velocityY, velocityZ));
+                return velocityConstructor.newInstance(entityID, vec3dConstructor.newInstance(velocityX, velocityY, velocityZ));
             } catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {
                 e.printStackTrace();
             }