AttributeModifier$Operation only to be fetched if viable (#773)

Author: libraryaddict

src/main/java/com/comphenix/protocol/wrappers/WrappedAttributeModifier.java

@@ -22,9 +22,9 @@
  * @author Kristian
  */
 public class WrappedAttributeModifier extends AbstractWrapper {
-	private static final Class<?> OPERATION_CLASS = MinecraftReflection.getMinecraftClass("AttributeModifier$Operation");
 	private static final boolean OPERATION_ENUM = MinecraftVersion.atOrAbove(MinecraftVersion.VILLAGE_UPDATE);
-	private static final EquivalentConverter<Operation> OPERATION_CONVERTER = new IndexedEnumConverter<>(Operation.class, OPERATION_CLASS);
+	private static final Class<?> OPERATION_CLASS;
+	private static final EquivalentConverter<Operation> OPERATION_CONVERTER;
 
 	private static class IndexedEnumConverter<T extends Enum<T>> implements EquivalentConverter<T> {
 		private Class<T> specificClass;
@@ -65,6 +65,11 @@ public Class<T> getSpecificType() {
 		}
 	}
 
+	static {
+		OPERATION_CLASS = OPERATION_ENUM ? MinecraftReflection.getMinecraftClass("AttributeModifier$Operation") : null;
+		OPERATION_CONVERTER = OPERATION_ENUM ? new IndexedEnumConverter<>(Operation.class, OPERATION_CLASS) : null;
+	}
+
 	 /**
 	  * Represents the different modifier operations.
 	  * <p>