private FileDescriptorProto generateFile(String name, FileContents contents) {
  FileDescriptorProto.Builder fileBuilder = FileDescriptorProto.newBuilder();
  fileBuilder.setName(name);
  if (!Strings.isNullOrEmpty(contents.packageName)) {
    fileBuilder.setPackage(contents.packageName);
  }
  for (Api api : contents.apis) {
    fileBuilder.addService(generateApi(api));
  }
  for (Type type : contents.types.values()) {
    fileBuilder.addMessageType(generateType(type, contents));
  }
  for (Enum e : contents.enums) {
    fileBuilder.addEnumType(generateEnum(e));
  }
  if (imports.containsKey(name)) {
    for (String imported : imports.get(name)) {
      fileBuilder.addDependency(imported);
    }
  }
  return fileBuilder.build();
}
 

@VisitsBefore
void normalize(EnumType enumType) {
  Enum.Builder coreEnumBuilder = Enum.newBuilder().setName(enumType.getFullName());
  coreEnumBuilder.setSourceContext(
      SourceContext.newBuilder()
          .setFileName(enumType.getFile().getLocation().getDisplayString()));
  coreEnumBuilder.setSyntax(enumType.getSyntax());

  for (EnumValue value : enumType.getReachableValues()) {
    com.google.protobuf.EnumValue.Builder coreEnumValueBuilder =
        com.google.protobuf.EnumValue.newBuilder();

    // Use simple name for enum value, as otherwise client has to use
    // fully qualified name in the request.
    coreEnumValueBuilder.setName(value.getSimpleName()).setNumber(value.getNumber());

    coreEnumValueBuilder.addAllOptions(
        DescriptorNormalization.getOptions(value.getProto(), includeDefaults));
    coreEnumBuilder.addEnumvalue(coreEnumValueBuilder.build());
  }

  coreEnumBuilder.addAllOptions(
      DescriptorNormalization.getOptions(enumType.getProto(), includeDefaults));

  enums.add(coreEnumBuilder.build());
}
 

/**
 * TODO (guptasu): Only needed to create NullValue enum.  Check if this can be removed.
 * Create the Protobuf.Enum instance from enumDescriptorProto.
 */
private static Enum createEnum(String enumName,
    EnumDescriptorProto enumDescriptorProto, String fileName) {

  com.google.protobuf.Enum.Builder coreEnumBuilder =
      com.google.protobuf.Enum.newBuilder().setName(enumName);

  coreEnumBuilder.setSyntax(Syntax.SYNTAX_PROTO3);

  for (EnumValueDescriptorProto value : enumDescriptorProto.getValueList()) {
    com.google.protobuf.EnumValue.Builder coreEnumValueBuilder =
        com.google.protobuf.EnumValue.newBuilder();
    coreEnumValueBuilder.setName(value.getName()).setNumber(value.getNumber());
    coreEnumBuilder.addEnumvalue(coreEnumValueBuilder.build());
  }

  coreEnumBuilder.setSourceContext(SourceContext.newBuilder().setFileName(fileName));
  return coreEnumBuilder.build();
}
 

@Test
public void testMismatch() throws Exception {
  Marshaller<Enum> enumMarshaller = ProtoLiteUtils.marshaller(Enum.getDefaultInstance());
  // Enum's name and Type's name are both strings with tag 1.
  Enum altProto = Enum.newBuilder().setName(proto.getName()).build();
  assertEquals(proto, marshaller.parse(enumMarshaller.stream(altProto)));
}
 

@Test
public void introspection() throws Exception {
  Marshaller<Enum> enumMarshaller = ProtoLiteUtils.marshaller(Enum.getDefaultInstance());
  PrototypeMarshaller<Enum> prototypeMarshaller = (PrototypeMarshaller<Enum>) enumMarshaller;
  assertSame(Enum.getDefaultInstance(), prototypeMarshaller.getMessagePrototype());
  assertSame(Enum.class, prototypeMarshaller.getMessageClass());
}
 

private EnumDescriptorProto generateEnum(Enum e) {
  EnumDescriptorProto.Builder builder = EnumDescriptorProto.newBuilder();
  builder.setName(getSimpleName(e.getName()));
  for (EnumValue value : e.getEnumvalueList()) {
    EnumValueDescriptorProto.Builder valueBuilder = EnumValueDescriptorProto.newBuilder();
    valueBuilder.setName(value.getName());
    valueBuilder.setNumber(value.getNumber());
    valueBuilder.setOptions(generateEnumValueOptions(value));
    builder.addValue(valueBuilder.build());
  }
  builder.setOptions(generateEnumOptions(e));
  return builder.build();
}
 

/**
 * Creates additional Enums (NullValue) to be added to the Service config.
 */
// TODO (guptasu): Fix this hack. Find a better way to add the predefined types.
// TODO (guptasu): Add them only when required and not in all cases.
static Iterable<Enum> createAdditionalServiceEnums() {
  // TODO (guptasu): Remove this hard coding. Without this, creation of Model from Service throws.
  // Needs investigation.
  String fileName = "struct.proto";
  List<Enum> additionalEnums = Lists.newArrayList();
  additionalEnums.add(TypesBuilderFromDescriptor.createEnum(NullValue.getDescriptor().getFullName(),
      NullValue.getDescriptor().toProto(), fileName));
  return additionalEnums;
}
 

@Test
public void testMismatch() throws Exception {
  Marshaller<Enum> enumMarshaller = ProtoLiteUtils.marshaller(Enum.getDefaultInstance());
  // Enum's name and Type's name are both strings with tag 1.
  Enum altProto = Enum.newBuilder().setName(proto.getName()).build();
  assertEquals(proto, marshaller.parse(enumMarshaller.stream(altProto)));
}
 

@Test
public void introspection() throws Exception {
  Marshaller<Enum> enumMarshaller = ProtoLiteUtils.marshaller(Enum.getDefaultInstance());
  PrototypeMarshaller<Enum> prototypeMarshaller = (PrototypeMarshaller<Enum>) enumMarshaller;
  assertSame(Enum.getDefaultInstance(), prototypeMarshaller.getMessagePrototype());
  assertSame(Enum.class, prototypeMarshaller.getMessageClass());
}
 

private EnumOptions generateEnumOptions(Enum e) {
  EnumOptions.Builder builder = EnumOptions.newBuilder();
  setOptions(builder, e.getOptionsList(), ENUM_OPTION_NAME_PREFIX);
  return builder.build();
}