support json_name proto annotation for renaming field names in GraphQL schema.

also bumping version to release 0.2.1.

Author: siderakis

rejoiner/pom.xml

@@ -41,7 +41,7 @@
   <groupId>com.google.api.graphql</groupId>
   <artifactId>rejoiner</artifactId>
   <name>Rejoiner</name>
-  <version>0.2.0</version>
+  <version>0.2.1</version>
   <description>Generating GraphQL schemas from Protobufs.</description>
   <url>https://github.com/google/rejoiner</url>
   <packaging>jar</packaging>

rejoiner/src/main/java/com/google/api/graphql/rejoiner/ProtoToGql.java

@@ -137,9 +137,7 @@ private static Object call(Object object, String methodName) {
           return method.invoke(object);
         } catch (NoSuchMethodException e) {
           return null;
-        } catch (IllegalAccessException e) {
-          throw new RuntimeException(e);
-        } catch (InvocationTargetException e) {
+        } catch (IllegalAccessException | InvocationTargetException e) {
           throw new RuntimeException(e);
         }
       }
@@ -154,7 +152,7 @@ public GraphQLFieldDefinition apply(FieldDescriptor fieldDescriptor) {
               .type(convertType(fieldDescriptor))
               .dataFetcher(
                   new ProtoDataFetcher(convertedFieldName))
-              .name(convertedFieldName);
+              .name(fieldDescriptor.getJsonName());
       builder.description(DescriptorSet.COMMENTS.get(fieldDescriptor.getFullName()));
       if (fieldDescriptor.getOptions().hasDeprecated()
           && fieldDescriptor.getOptions().getDeprecated()) {

rejoiner/src/test/java/com/google/api/graphql/rejoiner/ProtoToGqlTest.java

@@ -57,7 +57,7 @@ public void convertShouldWorkForMessage() {
     GraphQLObjectType result = ProtoToGql.convert(Proto1.getDescriptor(), null);
     assertThat(result.getName())
         .isEqualTo("javatests_com_google_api_graphql_rejoiner_proto_Proto1");
-    assertThat(result.getFieldDefinitions()).hasSize(5);
+    assertThat(result.getFieldDefinitions()).hasSize(6);
   }
 
   @Test
@@ -74,9 +74,10 @@ public void convertShouldWorkForEnums() {
   @Test
   public void checkFieldNameCamelCase() {
     GraphQLObjectType result = ProtoToGql.convert(Proto1.getDescriptor(), null);
-    assertThat(result.getFieldDefinitions()).hasSize(5);
+    assertThat(result.getFieldDefinitions()).hasSize(6);
     assertThat(result.getFieldDefinition("intField")).isNotNull();
     assertThat(result.getFieldDefinition("camelCaseName")).isNotNull();
+    assertThat(result.getFieldDefinition("RenamedField")).isNotNull();
   }
 
   @Test