Merge pull request #108 from graphql-java/fix-null-pointer-exception-batched

hotfix- fixing null pointer exception bug when using @GraphQLBatched

Author: guy120494

src/main/java/graphql/annotations/BatchedTypeFunction.java

@@ -37,7 +37,7 @@ public boolean canBuildType(final Class<?> aClass, final AnnotatedType type) {
     }
 
     @Override
-    public graphql.schema.GraphQLType buildType(final String typeName, final Class<?> aClass, final AnnotatedType annotatedType) {
+    public graphql.schema.GraphQLType buildType(String typeName, final Class<?> aClass, final AnnotatedType annotatedType) {
         if (!aClass.isAssignableFrom(List.class)) {
             throw new IllegalArgumentException("Batched method should return a List");
         }
@@ -48,10 +48,11 @@ public graphql.schema.GraphQLType buildType(final String typeName, final Class<?
         AnnotatedType arg = parameterizedType.getAnnotatedActualTypeArguments()[0];
         Class<?> klass;
         if (arg.getType() instanceof ParameterizedType) {
-            klass = (Class<?>)((ParameterizedType)(arg.getType())).getRawType();
+            klass = (Class<?>) ((ParameterizedType) (arg.getType())).getRawType();
         } else {
             klass = (Class<?>) arg.getType();
         }
+        typeName = klass.getSimpleName();
         return defaultTypeFunction.buildType(typeName, klass, arg);
     }
 }