Experimental ReflectionFix

SpigotCore_Main/src/com/comphenix/tinyprotocol/Reflection.java

@@ -63,6 +63,7 @@ public final class Reflection {
 		 * @param value - the new value of the field.
 		 */
 		void set(Object target, Object value);
+		void setInt(Object target, int value);
 
 		/**
 		 * Determine if the given object has this field.
@@ -156,15 +157,21 @@ public final class Reflection {
 					@Override
 					public void set(Object target, Object value) {
 						try {
-							if(field.getDeclaringClass() == int.class)
-								field.setInt(target, (int)value);
-							else
 							field.set(target, value);
 						} catch (IllegalAccessException e) {
 							throw new IllegalArgumentException("Cannot access reflection.", e);
 						}
 					}
 
+					@Override
+					public void setInt(Object target, int value) {
+						try {
+							field.setInt(target, value);
+						} catch (IllegalAccessException e) {
+							throw new IllegalArgumentException("Cannot access reflection.", e);
+						}
+					}
+
 					@Override
 					public boolean hasField(Object target) {
 						// target instanceof DeclaringClass

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

@@ -355,7 +355,7 @@ public class REntity {
 
     protected Object getDataWatcherPacket(Object... dataWatcherKeyValues) {
         Object packet = Reflection.newInstance(metadataPacket);
-        metadataEntity.set(packet, entityId);
+        metadataEntity.setInt(packet, entityId);
 
         ArrayList<Object> nativeWatchers = new ArrayList<>(1);
         for(int i = 0; i < dataWatcherKeyValues.length; i+=2) {