1.7.6 release

1.7.6 release

README.md

@@ -1,14 +1,10 @@
 # packetevents 
 
-A Spigot packet API with some nice utlities.
+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: PaperMC, Tuinity
-
-* No dependencies
-
-* Licensed under the MIT license
+This API is **only** supported on Spigot servers and has been tested to work on these Spigot forks: Paper, Tuinity, Purpur
 
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 
@@ -16,5 +12,3 @@ Our discord server: https://discord.me/packetevents
 
 [![](https://jitpack.io/v/retrooper/packetevents.svg)](https://jitpack.io/#retrooper/packetevents)
 
-[![](https://jitci.com/gh/retrooper/packetevents/svg)](https://jitci.com/gh/retrooper/packetevents)
-

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>io.github.retrooper</groupId>
     <artifactId>packetevents</artifactId>
-    <version>1.7.4</version>
+    <version>1.7.6</version>
 
     <!-- You can build the project with this: "mvn clean compile assembly:single" -->
     <build>
@@ -122,21 +122,6 @@
             <version>4.5.0</version>
             <scope>provided</scope>
         </dependency>
-
-        <dependency>
-            <groupId>us.myles</groupId>
-            <artifactId>viaversion</artifactId>
-            <version>3.0.1</version>
-            <scope>provided</scope>
-        </dependency>
-
-        <dependency>
-            <groupId>com.github.ProtocolSupport</groupId>
-            <artifactId>ProtocolSupport</artifactId>
-            <version>4fdd683</version>
-            <scope>provided</scope>
-        </dependency>
-
         <dependency>
             <groupId>org.spigotmc</groupId>
             <artifactId>spigot-api</artifactId>

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

@@ -26,8 +26,8 @@ package io.github.retrooper.packetevents;
 
 import io.github.retrooper.packetevents.bungee.BungeePluginMessageListener;
 import io.github.retrooper.packetevents.event.PacketEvent;
+import io.github.retrooper.packetevents.exceptions.PacketEventsLoadFailureException;
 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;
@@ -37,10 +37,11 @@ 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 io.github.retrooper.packetevents.utils.v_1_7_10.ProtocolVersionAccessor_v_1_7;
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
 import org.bukkit.event.player.PlayerJoinEvent;
 import org.bukkit.event.player.PlayerLoginEvent;
@@ -57,12 +58,13 @@ public final class PacketEvents implements Listener {
     private static final PacketEvents instance = new PacketEvents();
     private static final ArrayList<Plugin> plugins = new ArrayList<>(1);
     private static boolean loaded, initialized;
-    private static final PEVersion version = new PEVersion(1, 7, 4);
+    private static final PEVersion version = new PEVersion(1, 7, 6);
 
     private static PacketEventsSettings settings = new PacketEventsSettings();
-    /** General executor service, basically for anything that the packet executor service doesn't do.
+    /**
+     * General executor service, basically for anything that the packet executor service doesn't do.
      */
-    public static ExecutorService generalExecutorService = Executors.newCachedThreadPool();
+    public static ExecutorService generalExecutorService = Executors.newSingleThreadExecutor();
     //Executor used for player injecting/ejecting and for packet processing/event calling
     public static ExecutorService packetHandlingExecutorService = Executors.newSingleThreadExecutor();
 
@@ -105,7 +107,7 @@ public final class PacketEvents implements Listener {
 
                 WrappedPacket.loadAllWrappers();
             } catch (Exception ex) {
-                throw new IllegalStateException("PacketEvents failed to successfully load...", ex);
+                throw new PacketEventsLoadFailureException();
             }
             loaded = true;
         }
@@ -214,7 +216,7 @@ public final class PacketEvents implements Listener {
         return version;
     }
 
-    @EventHandler
+    @EventHandler(priority = EventPriority.LOW)
     public void onLogin(PlayerLoginEvent e) {
         if (PacketEvents.getSettings().shouldInjectEarly()) {
             assert getAPI().packetManager.tinyProtocol != null;
@@ -228,20 +230,14 @@ public final class PacketEvents implements Listener {
         }
     }
 
-    @EventHandler
+    @EventHandler(priority = EventPriority.LOW)
     public void onJoin(final PlayerJoinEvent e) {
-        if (!VersionLookupUtils.hasHandledLoadedDependencies()) {
-            VersionLookupUtils.handleLoadedDependencies();
+        if(PacketEvents.getAPI().getServerUtils().getVersion() == ServerVersion.v_1_7_10) {
+            Object channel = NMSUtils.getChannel(e.getPlayer());
+            ClientVersion version = ClientVersion.getClientVersion(ProtocolVersionAccessor_v_1_7.getProtocolVersion(e.getPlayer()));
+            PacketEvents.getAPI().getPlayerUtils().clientVersionsMap.put(channel, version);
         }
-        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()) {
             if (getAPI().packetManager.canInject(e.getPlayer())) {
                 PacketEvents.getAPI().packetManager.injectPlayer(e.getPlayer());
@@ -250,7 +246,7 @@ public final class PacketEvents implements Listener {
     }
 
 
-    @EventHandler
+    @EventHandler(priority = EventPriority.HIGHEST)
     public void onQuit(final PlayerQuitEvent e) {
         PacketEvents.getAPI().getPlayerUtils().clientVersionsMap.remove(e.getPlayer().getUniqueId());
     }

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

@@ -35,7 +35,7 @@ import org.bukkit.plugin.messaging.PluginMessageListener;
 import java.util.UUID;
 
 public class BungeePluginMessageListener implements PluginMessageListener {
-    public static String tagName = "packetevents";
+    public static String tagName = "packetevents:channel";
 
     @Override
     public void onPluginMessageReceived(String tag, Player player, byte[] bytes) {

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

@@ -28,5 +28,6 @@ package io.github.retrooper.packetevents.event;
  * A Packet listener.
  * Implement this interface in your listeners.
  */
+@Deprecated
 public interface PacketListener {
 }

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

@@ -22,13 +22,44 @@
  * SOFTWARE.
  */
 
-package io.github.retrooper.packetevents.utils.protocolsupport;
+package io.github.retrooper.packetevents.event;
 
-import org.bukkit.entity.Player;
-import protocolsupport.api.ProtocolSupportAPI;
+import io.github.retrooper.packetevents.event.impl.*;
 
-class ProtocolSupportAPIAccessor {
-    public static int getProtocolVersion(final Player player) {
-        return ProtocolSupportAPI.getProtocolVersion(player).getId();
+public abstract class PacketListenerDynamic {
+    private final byte priority;
+    public PacketListenerDynamic(final byte priority) {
+        this.priority = priority;
+    }
+
+    public final byte getPriority() {
+        return priority;
+    }
+
+    public void onPacketStatus(PacketStatusEvent event) {
+    }
+
+    public void onPacketLogin(PacketLoginEvent event) {
+    }
+
+    public void onPacketReceive(PacketReceiveEvent event) {
+    }
+
+    public void onPacketSend(PacketSendEvent event) {
+    }
+
+    public void onPostPacketReceive(PostPacketReceiveEvent event) {
+    }
+
+    public void onPostPacketSend(PostPacketSendEvent event) {
+    }
+
+    public void onPlayerInject(PlayerInjectEvent event) {
+    }
+
+    public void onPlayerEject(PlayerEjectEvent event) {
+    }
+
+    public void onPacketEvent(PacketEvent event) {
     }
 }

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

@@ -26,14 +26,10 @@ 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;
+import java.lang.annotation.*;
 
-@Target(ElementType.METHOD)
+@Target({ElementType.METHOD})
 @Retention(RetentionPolicy.RUNTIME)
-
 public @interface PacketHandler {
     byte priority() default PacketEventPriority.NORMAL;
 }

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

@@ -24,99 +24,57 @@
 
 package io.github.retrooper.packetevents.event.manager;
 
-import io.github.retrooper.packetevents.PacketEvents;
 import io.github.retrooper.packetevents.event.PacketEvent;
 import io.github.retrooper.packetevents.event.PacketListener;
-import io.github.retrooper.packetevents.event.annotation.PacketHandler;
-import io.github.retrooper.packetevents.event.eventtypes.CancellableEvent;
-import io.github.retrooper.packetevents.event.impl.*;
-import io.github.retrooper.packetevents.event.priority.PacketEventPriority;
-import io.github.retrooper.packetevents.utils.protocollib.ProtocolLibAPIListener;
-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.Map;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.ConcurrentLinkedQueue;
+import io.github.retrooper.packetevents.event.PacketListenerDynamic;
 
 public final class EventManager {
-    private final Map<PacketListener, List<Method>> staticRegisteredMethods = new HashMap<>();
-    public void callEvent(final PacketEvent e) {
-        //STATIC LISTENERS
-        for (final PacketListener listener : staticRegisteredMethods.keySet()) {
-            List<Method> methods = staticRegisteredMethods.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)) {
+    private final EventManagerLegacy legacyEventManager = new EventManagerLegacy();
+    private final EventManagerDynamic dynamicEventManager = new EventManagerDynamic();
 
-                    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();
-                        }
-                    }
-                }
-            }
-        }
+    public void callEvent(PacketEvent event) {
+        dynamicEventManager.callEvent(event);
+        legacyEventManager.callEvent(event);
     }
 
-    public void registerListener(final PacketListener listener) {
-        final List<Method> methods = new ArrayList<>();
-        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()) {
-            if (ProtocolLibUtils.isAvailable()
-                    && PacketEvents.getSettings().shouldUseProtocolLibIfAvailable()) {
-                ProtocolLibAPIListener.registerProtocolLibListener(listener, methods);
-            } else {
-                staticRegisteredMethods.put(listener, methods);
-            }
-        }
+    @Deprecated
+    public void registerListener(PacketListener listener) {
+        legacyEventManager.registerListener(listener);
     }
 
-    public void registerListeners(final PacketListener... listeners) {
-        for (final PacketListener listener : listeners) {
-            registerListener(listener);
-        }
+    @Deprecated
+    public void registerListeners(PacketListener... listeners) {
+        legacyEventManager.registerListeners(listeners);
     }
 
-    public void unregisterListener(final PacketListener e) {
-        staticRegisteredMethods.remove(e);
+    @Deprecated
+    public void unregisterListener(PacketListener listener) {
+        legacyEventManager.unregisterListener(listener);
     }
 
-    public void unregisterListeners(final PacketListener... listeners) {
-        for (final PacketListener listener : listeners) {
-            unregisterListener(listener);
-        }
+    @Deprecated
+    public void unregisterListeners(PacketListener... listeners) {
+        legacyEventManager.unregisterListeners(listeners);
+    }
+
+    public void registerListener(PacketListenerDynamic listener) {
+        dynamicEventManager.registerListener(listener);
+    }
+
+    public void registerListeners(PacketListenerDynamic... listeners) {
+        dynamicEventManager.registerListeners(listeners);
+    }
+
+    public void unregisterListener(PacketListenerDynamic listener) {
+        dynamicEventManager.unregisterListener(listener);
+    }
+
+    public void unregisterListeners(PacketListenerDynamic... listeners) {
+        dynamicEventManager.unregisterListeners(listeners);
     }
 
     public void unregisterAllListeners() {
-        staticRegisteredMethods.clear();
-    }
-
-    public boolean isRegistered(final PacketListener listener) {
-        return staticRegisteredMethods.containsKey(listener);
+        dynamicEventManager.unregisterAllListeners();
+        legacyEventManager.unregisterAllListeners();
     }
 }

src/main/java/io/github/retrooper/packetevents/event/manager/EventManagerDynamic.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.event.manager;
+
+import io.github.retrooper.packetevents.event.PacketEvent;
+import io.github.retrooper.packetevents.event.PacketListenerDynamic;
+import io.github.retrooper.packetevents.event.eventtypes.CancellableEvent;
+import io.github.retrooper.packetevents.event.impl.*;
+import io.github.retrooper.packetevents.event.priority.PacketEventPriority;
+import io.github.retrooper.packetevents.exceptions.PacketEventsMethodInvokeException;
+import io.github.retrooper.packetevents.utils.reflection.ClassUtil;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+class EventManagerDynamic {
+    private final Map<Byte, List<PacketListenerDynamic>> map = new HashMap<>();
+
+    public void callEvent(PacketEvent event) {
+        boolean isCancelled = false;
+        for (byte i = PacketEventPriority.LOWEST; i <= PacketEventPriority.MONITOR; i++) {
+            if (map.get(i) != null) {
+                for (PacketListenerDynamic listener : map.get(i)) {
+                    try {
+                        listener.onPacketEvent(event);
+                        if (event instanceof PacketStatusEvent) {
+                            listener.onPacketStatus((PacketStatusEvent) event);
+                        } else if (event instanceof PacketLoginEvent) {
+                            listener.onPacketLogin((PacketLoginEvent) event);
+                        } else if (event instanceof PacketReceiveEvent) {
+                            listener.onPacketReceive((PacketReceiveEvent) event);
+                        } else if (event instanceof PacketSendEvent) {
+                            listener.onPacketSend((PacketSendEvent) event);
+                        } else if (event instanceof PostPacketReceiveEvent) {
+                            listener.onPostPacketReceive((PostPacketReceiveEvent) event);
+                        } else if (event instanceof PostPacketSendEvent) {
+                            listener.onPostPacketSend((PostPacketSendEvent) event);
+                        } else if (event instanceof PlayerInjectEvent) {
+                            listener.onPlayerInject((PlayerInjectEvent) event);
+                        } else if (event instanceof PlayerEjectEvent) {
+                            listener.onPlayerEject((PlayerEjectEvent) event);
+                        }
+
+                    } catch (Exception ex) {
+                        throw new PacketEventsMethodInvokeException("PacketEvents " +
+                                "failed to call an event method in the " +
+                                "dynamic packet listener. Event type: "
+                                + ClassUtil.getClassSimpleName(event.getClass()));
+                    }
+
+                    if (event instanceof CancellableEvent) {
+                        CancellableEvent ce = (CancellableEvent) event;
+                        isCancelled = ce.isCancelled();
+                    }
+                }
+            }
+        }
+        if (event instanceof CancellableEvent) {
+            CancellableEvent ce = (CancellableEvent) event;
+            ce.setCancelled(isCancelled);
+        }
+    }
+
+    public void registerListener(PacketListenerDynamic listener) {
+            List<PacketListenerDynamic> listeners = map.get(listener.getPriority());
+            if (listeners == null) {
+                map.put(listener.getPriority(), new ArrayList<>());
+                listeners = map.get(listener.getPriority());
+            }
+            listeners.add(listener);
+    }
+
+    public void registerListeners(PacketListenerDynamic... listeners) {
+        for (PacketListenerDynamic listener : listeners) {
+            registerListener(listener);
+        }
+    }
+
+    public void unregisterListener(PacketListenerDynamic listener) {
+        List<PacketListenerDynamic> listeners = map.get(listener.getPriority());
+        if (listeners == null) {
+            return;
+        }
+        listeners.remove(listener);
+    }
+
+    public void unregisterListeners(PacketListenerDynamic... listeners) {
+        for (PacketListenerDynamic listener : listeners) {
+            unregisterListener(listener);
+        }
+    }
+
+    public void unregisterAllListeners() {
+        map.clear();
+    }
+}

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

@@ -0,0 +1,112 @@
+/*
+ * 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.event.PacketEvent;
+import io.github.retrooper.packetevents.event.PacketListener;
+import io.github.retrooper.packetevents.event.annotation.PacketHandler;
+import io.github.retrooper.packetevents.event.eventtypes.CancellableEvent;
+import io.github.retrooper.packetevents.event.priority.PacketEventPriority;
+
+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.Map;
+
+class EventManagerLegacy {
+    private final Map<PacketListener, List<Method>> staticRegisteredMethods = new HashMap<>();
+    public void callEvent(final PacketEvent e) {
+        boolean isCancelled = false;
+        byte eventPriority = PacketEventPriority.LOWEST;
+        //STATIC LISTENERS
+        for (final PacketListener listener : staticRegisteredMethods.keySet()) {
+            List<Method> methods = staticRegisteredMethods.get(listener);
+
+            for (Method method : methods) {
+                Class<?> parameterType = method.getParameterTypes()[0];
+                if (parameterType.equals(PacketEvent.class)
+                        || parameterType.isInstance(e)) {
+
+                    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) {
+                            eventPriority = annotation.priority();
+                            isCancelled = ce.isCancelled();
+                        }
+                    }
+                }
+            }
+        }
+        if(e instanceof CancellableEvent) {
+            CancellableEvent ce = (CancellableEvent)e;
+            ce.setCancelled(isCancelled);
+        }
+    }
+
+    public void registerListener(final PacketListener listener) {
+        final List<Method> methods = new ArrayList<>();
+        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()) {
+            staticRegisteredMethods.put(listener, methods);
+        }
+    }
+
+    public void registerListeners(final PacketListener... listeners) {
+        for (final PacketListener listener : listeners) {
+            registerListener(listener);
+        }
+    }
+
+    public void unregisterListener(final PacketListener e) {
+        staticRegisteredMethods.remove(e);
+    }
+
+    public void unregisterListeners(final PacketListener... listeners) {
+        for (final PacketListener listener : listeners) {
+            unregisterListener(listener);
+        }
+    }
+
+    public void unregisterAllListeners() {
+        staticRegisteredMethods.clear();
+    }
+}

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

@@ -25,19 +25,10 @@
 package io.github.retrooper.packetevents.example;
 
 import io.github.retrooper.packetevents.PacketEvents;
-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.PlayerEjectEvent;
-import io.github.retrooper.packetevents.event.impl.PlayerInjectEvent;
-import io.github.retrooper.packetevents.packettype.PacketType;
-import io.github.retrooper.packetevents.packetwrappers.in.chat.WrappedPacketInChat;
-import io.github.retrooper.packetevents.packetwrappers.out.helditemslot.WrappedPacketOutHeldItemSlot;
 import io.github.retrooper.packetevents.utils.server.ServerVersion;
-import org.bukkit.Bukkit;
 import org.bukkit.plugin.java.JavaPlugin;
 
-public class MainExample extends JavaPlugin implements PacketListener {
+public class MainExample extends JavaPlugin {
 
     @Override
     public void onLoad() {
@@ -46,10 +37,9 @@ public class MainExample extends JavaPlugin implements PacketListener {
 
     @Override
     public void onEnable() {
-        PacketEvents.getSettings().injectAsync(true).ejectAsync(true).
-                backupServerVersion(ServerVersion.v_1_7_10).useProtocolLibIfAvailable(true).
-                checkForUpdates(true).injectEarly(true).packetHandlingThreadCount(1);
-        PacketEvents.getAPI().getEventManager().registerListener(this);
+        PacketEvents.getSettings().injectAsync(true).ejectAsync(true)
+                .backupServerVersion(ServerVersion.v_1_7_10).checkForUpdates(true).injectEarly(true).
+                packetHandlingThreadCount(1);
         PacketEvents.init(this);
     }
 

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

@@ -22,12 +22,14 @@
  * SOFTWARE.
  */
 
-package io.github.retrooper.packetevents.utils.protocollib;
+package io.github.retrooper.packetevents.exceptions;
 
-import org.bukkit.Bukkit;
+public class PacketEventsLoadFailureException extends RuntimeException {
+    public PacketEventsLoadFailureException(String message) {
+        super(message);
+    }
 
-public class ProtocolLibUtils {
-    public static boolean isAvailable() {
-        return Bukkit.getPluginManager().isPluginEnabled("ProtocolLib");
+    public PacketEventsLoadFailureException() {
+        this("PacketEvents failed to successfully load...");
     }
 }

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

@@ -22,17 +22,20 @@
  * SOFTWARE.
  */
 
-package io.github.retrooper.packetevents.utils.protocolsupport;
+package io.github.retrooper.packetevents.exceptions;
 
-import org.bukkit.Bukkit;
-import org.bukkit.entity.Player;
+import io.github.retrooper.packetevents.event.PacketListener;
+import io.github.retrooper.packetevents.utils.reflection.ClassUtil;
 
-public class ProtocolSupportUtils {
-    public static boolean isAvailable() {
-        return Bukkit.getPluginManager().isPluginEnabled("ProtocolSupport");
+import java.lang.reflect.Method;
+
+public class PacketEventsMethodAccessException extends RuntimeException {
+    public PacketEventsMethodAccessException(String message) {
+        super(message);
     }
 
-    public static int getProtocolVersion(final Player player) {
-        return ProtocolSupportAPIAccessor.getProtocolVersion(player);
+    public PacketEventsMethodAccessException(Method method, PacketListener listener) {
+        this("PacketEvents failed to access the "
+                + method.getName() + " method in " + ClassUtil.getClassSimpleName(listener.getClass()));
     }
 }

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

@@ -22,18 +22,20 @@
  * SOFTWARE.
  */
 
-package io.github.retrooper.packetevents.utils.viaversion;
+package io.github.retrooper.packetevents.exceptions;
 
-import org.bukkit.Bukkit;
-import org.bukkit.entity.Player;
+import io.github.retrooper.packetevents.event.PacketListener;
+import io.github.retrooper.packetevents.utils.reflection.ClassUtil;
 
+import java.lang.reflect.Method;
 
-public class ViaUtils {
-    public static int getProtocolVersion(final Player player) {
-        return ViaAPIAccessor.getProtocolVersion(player);
+public class PacketEventsMethodInvokeException extends RuntimeException {
+    public PacketEventsMethodInvokeException(String message) {
+        super(message);
     }
 
-    public static boolean isAvailable() {
-        return Bukkit.getPluginManager().isPluginEnabled("ViaVersion");
+    public PacketEventsMethodInvokeException(Method method, PacketListener listener) {
+        this("PacketEvents failed to call the " + method.getName() + " method in "
+                + ClassUtil.getClassSimpleName(listener.getClass()));
     }
 }

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

@@ -22,19 +22,14 @@
  * SOFTWARE.
  */
 
-package io.github.retrooper.packetevents.utils.viaversion;
+package io.github.retrooper.packetevents.exceptions;
 
-import org.bukkit.entity.Player;
-import us.myles.ViaVersion.api.Via;
-
-import java.util.UUID;
-
-class ViaAPIAccessor {
-    public static int getProtocolVersion(final Player player) {
-        return getProtocolVersion(player.getUniqueId());
+public class PacketEventsNMSCachedEntityNotFoundException extends RuntimeException {
+    public PacketEventsNMSCachedEntityNotFoundException(String message) {
+        super(message);
     }
 
-    public static int getProtocolVersion(final UUID uuid) {
-        return Via.getAPI().getPlayerVersion(uuid);
+    public PacketEventsNMSCachedEntityNotFoundException(int entityID) {
+        this("PacketEvents failed to find an entity with ID " + entityID + " in NMS' entity cache map!");
     }
 }

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

@@ -30,16 +30,14 @@ 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 io.github.retrooper.packetevents.utils.server.ServerVersion;
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.Plugin;
 
 import java.util.HashMap;
 import java.util.UUID;
-import java.util.concurrent.ConcurrentLinkedQueue;
 import java.util.concurrent.atomic.AtomicInteger;
 
 public class PacketManager {
@@ -269,7 +267,7 @@ public class PacketManager {
             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;
+            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);
         }
@@ -282,13 +280,12 @@ public class PacketManager {
     }
 
     private void interceptLogin(PacketLoginEvent event) {
-        if (event.getPacketId() == PacketType.Login.HANDSHAKE) {
-            if (!VersionLookupUtils.isDependencyAvailable()) {
+        if (event.getPacketId() == PacketType.Login.HANDSHAKE &&
+        PacketEvents.getAPI().getServerUtils().getVersion() != ServerVersion.v_1_7_10) {
                 WrappedPacketLoginHandshake handshake = new WrappedPacketLoginHandshake(event.getNMSPacket());
                 int protocolVersion = handshake.getProtocolVersion();
                 ClientVersion version = ClientVersion.getClientVersion(protocolVersion);
                 PacketEvents.getAPI().getPlayerUtils().clientVersionsMap.put(event.getChannel(), version);
-            }
         }
     }
 

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

@@ -1,7 +1,6 @@
 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;
@@ -10,12 +9,12 @@ 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.HandlerList;
-import org.bukkit.event.Listener;
 import org.bukkit.plugin.Plugin;
 import org.bukkit.scheduler.BukkitRunnable;
 
-import java.util.*;
+import java.util.List;
+import java.util.Map;
+import java.util.NoSuchElementException;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.logging.Level;
 
@@ -403,11 +402,11 @@ public class TinyProtocol7 {
     }
 
     public void ejectChannelSync(Object ch) {
-        uninjectChannel((Channel)ch);
+        uninjectChannel((Channel) ch);
     }
 
     public void ejectChannelAsync(Object ch) {
-        uninjectChannelAsync((Channel)ch);
+        uninjectChannelAsync((Channel) ch);
     }
 
     /**
@@ -471,11 +470,7 @@ public class TinyProtocol7 {
             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);
-            }
+            msg = onPacketInAsync(player, channel, msg);
 
             if (msg != null) {
                 super.channelRead(ctx, msg);
@@ -485,12 +480,7 @@ public class TinyProtocol7 {
 
         @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);
-            }
-
+            msg = onPacketOutAsync(player, ctx.channel(), msg);
             if (msg != null) {
                 super.write(ctx, msg, promise);
                 PacketEvents.getAPI().packetManager.postWrite(player, msg);

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

@@ -4,7 +4,6 @@ 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.*;
@@ -165,9 +164,9 @@ public class TinyProtocol8 {
         boolean looking = true;
 
         // We need to synchronize against this list
-        if(getNetworkMarkers != null) {
-        networkManagers = (List<Object>) getNetworkMarkers.invoke(null, serverConnection);}
-        else {
+        if (getNetworkMarkers != null) {
+            networkManagers = (List<Object>) getNetworkMarkers.invoke(null, serverConnection);
+        } else {
             networkManagers = new ArrayList<>();
         }
         createServerChannelHandler();
@@ -502,11 +501,7 @@ public class TinyProtocol8 {
             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);
-            }
+            msg = onPacketInAsync(player, channel, msg);
 
             if (msg != null) {
                 super.channelRead(ctx, msg);
@@ -516,11 +511,7 @@ public class TinyProtocol8 {
 
         @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);
-            }
+            msg = onPacketOutAsync(player, ctx.channel(), msg);
 
             if (msg != null) {
                 super.write(ctx, msg, promise);

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

@@ -39,11 +39,12 @@ public class PacketType {
             packetIds.put(PacketTypeClasses.Status.SERVER_INFO, SERVER_INFO);
         }
     }
+
     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;
+                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);

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

@@ -39,9 +39,10 @@ public class PacketTypeClasses {
             PacketType.Status.init();
         }
     }
+
     public static class Login {
-        public static Class<?>  HANDSHAKE,
-                IN_CUSTOM_PAYLOAD, OUT_CUSTOM_PAYLOAD,IN_START, IN_ENCRYPTION_BEGIN,
+        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() {

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

@@ -491,7 +491,8 @@ public class WrappedPacket implements WrapperPacketReader, WrapperPacketWriter {
     public Object readObject(int index, Class<?> type) {
         Map<Class<?>, Field[]> cached = fieldCache.get(packetClass);
         if (cached != null) {
-            if (!cached.containsKey(type)) {
+            Field[] cachedFields = cached.get(type);
+            if (cachedFields == null) {
                 List<Field> typeFields = new ArrayList<>();
                 for (Field f : packetClass.getDeclaredFields()) {
                     f.setAccessible(true);
@@ -501,10 +502,14 @@ public class WrappedPacket implements WrapperPacketReader, WrapperPacketWriter {
                 }
                 if (!typeFields.isEmpty()) {
                     cached.put(type, typeFields.toArray(new Field[0]));
+                    cachedFields = cached.get(type);
+                }
+                else {
+                    throw new WrapperFieldNotFoundException("The class you are trying to read fields from does not contain any fields!");
                 }
             }
             try {
-                return cached.get(type)[index].get(packet);
+                return cachedFields[index].get(packet);
             } catch (IllegalAccessException e) {
                 e.printStackTrace();
             }
@@ -601,12 +606,9 @@ public class WrappedPacket implements WrapperPacketReader, WrapperPacketWriter {
     }
 
     private List<Field> getFields(Class<?> type, Field[] fields) {
-        List<Field> ret = null;
+        List<Field> ret = new ArrayList<>();
         for (Field field : fields) {
             if (field.getType() == type) {
-                if (ret == null) {
-                    ret = new ArrayList<>();
-                }
                 ret.add(field);
             }
         }

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

@@ -27,8 +27,6 @@ package io.github.retrooper.packetevents.packetwrappers.in.blockplace;
 import io.github.retrooper.packetevents.enums.Direction;
 import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
 import io.github.retrooper.packetevents.utils.server.ServerVersion;
-import org.bukkit.entity.Player;
-import org.bukkit.inventory.ItemStack;
 
 
 public final class WrappedPacketInBlockPlace extends WrappedPacket {
@@ -41,21 +39,17 @@ public final class WrappedPacketInBlockPlace extends WrappedPacket {
     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_8_8) {
-            WrappedPacketInBlockPlace_1_9.load();
-        }
+        WrappedPacketInBlockPlace_1_9.load();
     }
 
     public Direction getDirection() {
-        if(isHigherThan_v_1_8_8) {
+        if (isHigherThan_v_1_8_8) {
             WrappedPacketInBlockPlace_1_9 blockPlace_1_9 = new WrappedPacketInBlockPlace_1_9(packet);
-            return Direction.valueOf(((Enum)blockPlace_1_9.getEnumDirectionObject()).name());
-        }
-        else if(isHigherThan_v_1_7_10) {
+            return Direction.valueOf(((Enum) blockPlace_1_9.getEnumDirectionObject()).name());
+        } else if (isHigherThan_v_1_7_10) {
             WrappedPacketInBlockPlace_1_8 blockPlace_1_8 = new WrappedPacketInBlockPlace_1_8(packet);
             return Direction.values()[blockPlace_1_8.getFace()];
-        }
-        else {
+        } else {
             WrappedPacketInBlockPlace_1_7_10 blockPlace_1_7_10 = new WrappedPacketInBlockPlace_1_7_10(packet);
             return Direction.values()[blockPlace_1_7_10.face];
         }

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

@@ -40,38 +40,39 @@ final class WrappedPacketInBlockPlace_1_8 extends WrappedPacket {
 
     public int getX() {
         if(blockPosObj == null) {
-            blockPosObj = readObject(0, NMSUtils.blockPosClass);
+            blockPosObj = readObject(1, NMSUtils.blockPosClass);
         }
         try {
             return (int) Reflection.getMethod(blockPosObj.getClass().getSuperclass(), "getX", 0).invoke(blockPosObj);
         } catch (IllegalAccessException | InvocationTargetException e) {
             e.printStackTrace();
         }
-        return -1;
+        return 0;
     }
+    
 
     public int getY() {
         if(blockPosObj == null) {
-            blockPosObj = readObject(0, NMSUtils.blockPosClass);
+            blockPosObj = readObject(1, NMSUtils.blockPosClass);
         }
         try {
             return (int) Reflection.getMethod(blockPosObj.getClass().getSuperclass(), "getY", 0).invoke(blockPosObj);
         } catch (IllegalAccessException | InvocationTargetException e) {
             e.printStackTrace();
         }
-        return -1;
+        return 0;
     }
 
     public int getZ() {
         if(blockPosObj == null) {
-            blockPosObj = readObject(0, NMSUtils.blockPosClass);
+            blockPosObj = readObject(1, NMSUtils.blockPosClass);
         }
         try {
             return (int) Reflection.getMethod(blockPosObj.getClass().getSuperclass(), "getZ", 0).invoke(blockPosObj);
         } catch (IllegalAccessException | InvocationTargetException e) {
             e.printStackTrace();
         }
-        return -1;
+        return 0;
     }
 
     public ItemStack getItemStack() {

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

@@ -58,7 +58,7 @@ final class WrappedPacketInBlockPlace_1_9 extends WrappedPacket {
         } catch (IllegalAccessException | InvocationTargetException e) {
             e.printStackTrace();
         }
-        return -1;
+        return 0;
     }
 
     public int getY() {
@@ -76,7 +76,7 @@ final class WrappedPacketInBlockPlace_1_9 extends WrappedPacket {
         } catch (IllegalAccessException | InvocationTargetException e) {
             e.printStackTrace();
         }
-        return -1;
+        return 0;
     }
 
     public int getZ() {
@@ -94,7 +94,7 @@ final class WrappedPacketInBlockPlace_1_9 extends WrappedPacket {
         } catch (IllegalAccessException | InvocationTargetException e) {
             e.printStackTrace();
         }
-        return -1;
+        return 0;
     }
 
     public Object getEnumDirectionObject() {

src/main/java/io/github/retrooper/packetevents/packetwrappers/out/blockchange/WrappedPacketOutBlockChange.java

@@ -0,0 +1,53 @@
+/*
+ * 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.blockchange;
+
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+
+class WrappedPacketOutBlockChange extends WrappedPacket {
+    public WrappedPacketOutBlockChange(Object packet) {
+        super(packet);
+    }
+//to-do load
+    @Override
+    protected void setup() {
+        //1.7 - int, int, int, Block, int data
+        //1.8+ - BlockPosition, IBlockData
+
+        //Constructors
+        //1.7 - int, int, int, World
+
+        //1.8->~1.12.2(World, BlockPosition)
+
+        //~1.13->~1.14(IBlockAccess, BlockPosition)
+        //1.16+(BlockPosition, IBlockData)
+        net.minecraft.server.v1_7_R4.PacketPlayOutBlockChange bc;
+        net.minecraft.server.v1_8_R3.PacketPlayOutBlockChange bc1;
+        net.minecraft.server.v1_9_R1.PacketPlayOutBlockChange bc2;
+        net.minecraft.server.v1_12_R1.PacketPlayOutBlockChange bc3;
+        net.minecraft.server.v1_13_R2.PacketPlayOutBlockChange bc4;
+        net.minecraft.server.v1_16_R2.PacketPlayOutBlockChange bc5;
+    }
+}

src/main/java/io/github/retrooper/packetevents/settings/PacketEventsSettings.java

@@ -31,7 +31,6 @@ public class PacketEventsSettings {
     private ServerVersion backupServerVersion = ServerVersion.v_1_7_10;
     private boolean injectAsync = true;
     private boolean ejectAsync = true;
-    private boolean useProtocolLibIfAvailable;
     private boolean checkForUpdates = true;
     private boolean injectEarly = true;
     private int packetHandlingThreadCount = 1;
@@ -52,11 +51,6 @@ public class PacketEventsSettings {
         return this;
     }
 
-    public PacketEventsSettings useProtocolLibIfAvailable(boolean useProtocolLibIfAvailable) {
-        this.useProtocolLibIfAvailable = useProtocolLibIfAvailable;
-        return this;
-    }
-
     public PacketEventsSettings checkForUpdates(boolean checkForUpdates) {
         this.checkForUpdates = checkForUpdates;
         return this;
@@ -85,10 +79,6 @@ public class PacketEventsSettings {
         return ejectAsync;
     }
 
-    public boolean shouldUseProtocolLibIfAvailable() {
-        return useProtocolLibIfAvailable;
-    }
-
     public boolean shouldCheckForUpdates() {
         return checkForUpdates;
     }

src/main/java/io/github/retrooper/packetevents/utils/BlockIteratorUtils.java

@@ -1,42 +0,0 @@
-/*
- * 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.utils;
-
-import org.bukkit.Location;
-import org.bukkit.block.Block;
-import org.bukkit.entity.Player;
-import org.bukkit.util.BlockIterator;
-
-public class BlockIteratorUtils {
-    public static Block getBlockLookingAt(final Player player, final int distance) {
-        final Location location = player.getEyeLocation();
-        final BlockIterator blocksToAdd = new BlockIterator(location, 0.0D, distance);
-        Block block = null;
-        while (blocksToAdd.hasNext()) {
-            block = blocksToAdd.next();
-        }
-        return block;
-    }
-}

src/main/java/io/github/retrooper/packetevents/utils/entityfinder/EntityFinderUtils.java

@@ -25,6 +25,7 @@
 package io.github.retrooper.packetevents.utils.entityfinder;
 
 import io.github.retrooper.packetevents.annotations.Nullable;
+import io.github.retrooper.packetevents.exceptions.PacketEventsNMSCachedEntityNotFoundException;
 import io.github.retrooper.packetevents.utils.nms.NMSUtils;
 import io.github.retrooper.packetevents.utils.server.ServerVersion;
 import org.bukkit.Bukkit;
@@ -72,7 +73,7 @@ public final class EntityFinderUtils {
                 return entity;
             }
         }
-        return null;
+        throw new PacketEventsNMSCachedEntityNotFoundException(id);
     }
 
     /**
@@ -88,7 +89,7 @@ public final class EntityFinderUtils {
         } catch (IllegalAccessException | InvocationTargetException e) {
             e.printStackTrace();
         }
-        return null;
+        throw new PacketEventsNMSCachedEntityNotFoundException(id);
     }
 
     public static Object getNMSEntityByIdWithWorld(final World world, final int id) {
@@ -112,6 +113,9 @@ public final class EntityFinderUtils {
         } catch (IllegalAccessException | InvocationTargetException e) {
             e.printStackTrace();
         }
+        if(nmsEntity == null) {
+            throw new PacketEventsNMSCachedEntityNotFoundException(id);
+        }
         return nmsEntity;
     }
 
@@ -133,7 +137,7 @@ public final class EntityFinderUtils {
         } catch (IllegalAccessException | InvocationTargetException e) {
             e.printStackTrace();
         }
-        return null;
+        throw new PacketEventsNMSCachedEntityNotFoundException(id);
     }
 
     /**

src/main/java/io/github/retrooper/packetevents/utils/protocollib/ProtocolLibAPIListener.java

@@ -1,144 +0,0 @@
-/*
- * 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.utils.protocollib;
-
-import com.comphenix.protocol.PacketType;
-import com.comphenix.protocol.ProtocolLibrary;
-import com.comphenix.protocol.events.ListenerPriority;
-import com.comphenix.protocol.events.PacketAdapter;
-import com.comphenix.protocol.events.PacketEvent;
-import io.github.retrooper.packetevents.PacketEvents;
-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.event.priority.PacketEventPriority;
-
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Set;
-import java.util.concurrent.ConcurrentLinkedQueue;
-
-public class ProtocolLibAPIListener {
-    public static void registerProtocolLibListener(PacketListener listener, List<Method> methods) {
-        if (ProtocolLibUtils.isAvailable()) {
-            for (Method m : methods) {
-                if (m.getParameterTypes()[0].equals(PacketReceiveEvent.class)) {
-                    PacketHandler annotation = m.getAnnotation(PacketHandler.class);
-                    ListenerPriority priority;
-                    switch (annotation.priority()) {
-                        case PacketEventPriority.LOWEST:
-                            priority = ListenerPriority.LOWEST;
-                            break;
-                        case PacketEventPriority.LOW:
-                            priority = ListenerPriority.LOW;
-                            break;
-                        case PacketEventPriority.HIGH:
-                            priority = ListenerPriority.HIGH;
-                            break;
-                        case PacketEventPriority.HIGHEST:
-                            priority = ListenerPriority.HIGHEST;
-                            break;
-                        case PacketEventPriority.MONITOR:
-                            priority = ListenerPriority.MONITOR;
-                            break;
-                        default:
-                            priority = ListenerPriority.NORMAL;
-                            break;
-                    }
-                    Set<PacketType> clientValues = new HashSet<>();
-                    for(PacketType type : PacketType.Play.Client.getInstance().values()) {
-                        if(type.isSupported()) {
-                            clientValues.add(type);
-                        }
-                    }
-                    ProtocolLibrary.getProtocolManager().
-                            addPacketListener(new PacketAdapter(PacketEvents.getPlugins().get(0),
-                                    priority, clientValues) {
-                                @Override
-                                public void onPacketReceiving(PacketEvent event) {
-                                    event.setReadOnly(false);
-                                    PacketReceiveEvent receiveEvent = new PacketReceiveEvent(event.getPlayer(), event.getPacket().getHandle());
-                                    try {
-                                        m.invoke(listener, receiveEvent);
-                                    } catch (IllegalAccessException | InvocationTargetException e) {
-                                        e.printStackTrace();
-                                    }
-                                    event.setCancelled(receiveEvent.isCancelled());
-                                }
-                            });
-                } else if (m.getParameterTypes()[0].equals(PacketSendEvent.class)) {
-                    PacketHandler annotation = m.getAnnotation(PacketHandler.class);
-                    ListenerPriority priority;
-                    switch (annotation.priority()) {
-                        case PacketEventPriority.LOWEST:
-                            priority = ListenerPriority.LOWEST;
-                            break;
-                        case PacketEventPriority.LOW:
-                            priority = ListenerPriority.LOW;
-                            break;
-                        case PacketEventPriority.HIGH:
-                            priority = ListenerPriority.HIGH;
-                            break;
-                        case PacketEventPriority.HIGHEST:
-                            priority = ListenerPriority.HIGHEST;
-                            break;
-                        case PacketEventPriority.MONITOR:
-                            priority = ListenerPriority.MONITOR;
-                            break;
-                        default:
-                            priority = ListenerPriority.NORMAL;
-                            break;
-                    }
-                    Set<PacketType> serverValues = new HashSet<>();
-                    for(PacketType serverType : PacketType.Play.Server.getInstance().values()) {
-                        if(serverType.isSupported()) {
-                            serverValues.add(serverType);
-                        }
-                    }
-
-
-                    ProtocolLibrary.getProtocolManager().
-                            addPacketListener(new PacketAdapter(PacketEvents.getPlugins().get(0),
-                                    priority, serverValues) {
-                                @Override
-                                public void onPacketSending(PacketEvent event) {
-                                    event.setReadOnly(false);
-                                    PacketSendEvent sendEvent = new PacketSendEvent(event.getPlayer(), event.getPacket().getHandle());
-                                    try {
-                                        m.invoke(listener, sendEvent);
-                                    } catch (IllegalAccessException | InvocationTargetException e) {
-                                        e.printStackTrace();
-                                    }
-                                    event.setCancelled(sendEvent.isCancelled());
-                                }
-                            });
-                }
-            }
-        }
-    }
-}

src/main/java/io/github/retrooper/packetevents/utils/versionlookup/VersionLookupUtils.java

@@ -1,76 +0,0 @@
-/*
- * 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.utils.versionlookup;
-
-import io.github.retrooper.packetevents.PacketEvents;
-import io.github.retrooper.packetevents.utils.protocolsupport.ProtocolSupportUtils;
-import io.github.retrooper.packetevents.utils.server.ServerVersion;
-import io.github.retrooper.packetevents.utils.v_1_7_10.ProtocolVersionAccessor_v_1_7;
-import io.github.retrooper.packetevents.utils.viaversion.ViaUtils;
-import org.bukkit.entity.Player;
-
-public class VersionLookupUtils {
-
-    private static byte protocolAccessMode = -2;
-
-    public static void handleLoadedDependencies() {
-        protocolAccessMode = (byte) (ViaUtils.isAvailable() ?
-                0 : ProtocolSupportUtils.isAvailable() ?
-                1 : PacketEvents.getAPI().getServerUtils().getVersion() == ServerVersion.v_1_7_10 ?
-                2 : -1);
-    }
-
-    public static boolean hasHandledLoadedDependencies() {
-        return protocolAccessMode != -2;
-    }
-
-    public static boolean isDependencyAvailable() {
-        return ViaUtils.isAvailable()
-                || ProtocolSupportUtils.isAvailable();
-    }
-
-
-    /**
-     * If ViaVersion is present, we get the protocol version with the ViaVersion API.
-     * If ProtocolSupport is present, we get the protocol version with the ProtocolSupport API.
-     * If ProtocolLib is present, we get the protocol version with the ProtocolLib API.
-     * Otherwise return -1
-     *
-     * @param player target player
-     * @return protocol version of the player if ViaVersion or ProtocolSupport or ProtocolLib is present. Otherwise -1
-     */
-    public static int getProtocolVersion(final Player player) {
-        switch (protocolAccessMode) {
-            case 0:
-                return ViaUtils.getProtocolVersion(player);
-            case 1:
-                return ProtocolSupportUtils.getProtocolVersion(player);
-            case 2:
-                return ProtocolVersionAccessor_v_1_7.getProtocolVersion(player);
-            default:
-                return -1;
-        }
-    }
-}