Problem: other types might need to specify their backing classes

Solution: introduce a generic interface for that

Author: yrashk

src/main/java/graphql/annotations/GraphQLObjectBackedByClass.java

@@ -0,0 +1,19 @@
+/**
+ * Copyright 2016 Yurii Rashkovskii
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ */
+package graphql.annotations;
+
+public interface GraphQLObjectBackedByClass {
+    Class<?> getObjectClass();
+}

src/main/java/graphql/annotations/GraphQLObjectTypeWrapper.java

@@ -17,7 +17,7 @@
 import graphql.schema.GraphQLObjectType;
 import lombok.Getter;
 
-public class GraphQLObjectTypeWrapper extends GraphQLObjectType {
+public class GraphQLObjectTypeWrapper extends GraphQLObjectType implements GraphQLObjectBackedByClass {
 
     @Getter
     private final Class<?> objectClass;