Simplify REntityFilter

SpigotCore_Main/src/de/steamwar/entity/REntityServer.java

@@ -40,6 +40,7 @@ import java.util.concurrent.ConcurrentHashMap;
 import java.util.function.BiConsumer;
 import java.util.function.BiFunction;
 import java.util.function.Consumer;
+import java.util.function.Function;
 
 
 public class REntityServer implements Listener {
@@ -48,15 +49,16 @@ public class REntityServer implements Listener {
     private static final HashSet<Player> emptyPlayers = new HashSet<>(0);
 
     private static final Class<?> useEntity = Reflection.getClass("{nms.network.protocol.game}.PacketPlayInUseEntity");
-    private static final Class<?> useEntityEnumAction = Reflection.getClass("{nms.network.protocol.game}.PacketPlayInUseEntity$EnumEntityUseAction");
     private static final Reflection.FieldAccessor<Integer> useEntityTarget = Reflection.getField(useEntity, int.class, 0);
-    private static final Reflection.FieldAccessor<Object> useEntityAction = (Reflection.FieldAccessor<Object>) Reflection.getField(useEntity, useEntityEnumAction, 0);
-    private static final Reflection.MethodInvoker useEntityGetAction;
+    private static final Class<?> useEntityEnumAction = Reflection.getClass("{nms.network.protocol.game}.PacketPlayInUseEntity$EnumEntityUseAction");
+    private static final Reflection.FieldAccessor<?> useEntityAction = Reflection.getField(useEntity, useEntityEnumAction, 0);
+    private static final Function<Object, Integer> getEntityAction;
     static {
-        if (useEntityEnumAction.isEnum()) {
-            useEntityGetAction = null;
+        if(Core.getVersion() > 15) {
+            Reflection.MethodInvoker useEntityGetAction = Reflection.getMethod(useEntity, "a");
+            getEntityAction = value -> ((Enum<?>) useEntityGetAction.invoke(value)).ordinal();
         } else {
-            useEntityGetAction = Reflection.getMethod(useEntity, "a");
+            getEntityAction = value -> ((Enum<?>) value).ordinal();
         }
     }
 
@@ -68,24 +70,13 @@ public class REntityServer implements Listener {
 
     private EntityActionListener callback = null;
 
-    private BiFunction<Player, Object, Object> filter = (player, packet) -> {
-        if (callback == null) return packet;
-        int target = useEntityTarget.get(packet);
-        REntity entity = entityMap.get(target);
-        if (entity == null) return packet;
+    private final BiFunction<Player, Object, Object> filter = (player, packet) -> {
+        REntity entity = entityMap.get(useEntityTarget.get(packet));
+        if (entity == null)
+            return packet;
 
-        Object entityAction = useEntityAction.get(packet);
-        int entityActionOrdinal;
-        if (useEntityEnumAction.isEnum()) {
-            entityActionOrdinal = ((Enum<?>) entityAction).ordinal();
-        } else {
-            entityActionOrdinal = ((Enum<?>) useEntityGetAction.invoke(entityAction)).ordinal();
-        }
-
-        EntityAction action = entityActionOrdinal == 1 ? EntityAction.ATTACK : EntityAction.INTERACT;
-        Bukkit.getScheduler().runTask(Core.getInstance(), () -> {
-            callback.onAction(player, entity, action);
-        });
+        EntityAction action = getEntityAction.apply(useEntityAction.get(packet)) == 1 ? EntityAction.ATTACK : EntityAction.INTERACT;
+        Bukkit.getScheduler().runTask(Core.getInstance(), () -> callback.onAction(player, entity, action));
         return null;
     };