@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();
}
 

private FileContents getFileContents(SourceContext sourceContext) {
  String fileName = sourceContext.getFileName();
  if (!contentsByFile.containsKey(fileName)) {
    contentsByFile.put(fileName, new FileContents());
  }
  return contentsByFile.get(fileName);
}
 

@VisitsBefore
void normalize(Interface iface) {
  Api.Builder coreApiBuilder = Api.newBuilder().setName(iface.getFullName());
  coreApiBuilder.setSourceContext(
      SourceContext.newBuilder().setFileName(iface.getFile().getLocation().getDisplayString()));
  coreApiBuilder.setSyntax(iface.getSyntax());

  for (Method method : iface.getReachableMethods()) {
    com.google.protobuf.Method.Builder coreMethodBuilder =
        com.google.protobuf.Method.newBuilder()
            .setName(method.getSimpleName())
            .setRequestTypeUrl(generateTypeUrl(method.getInputType()))
            .setResponseTypeUrl(generateTypeUrl(method.getOutputType()));

    coreMethodBuilder.setRequestStreaming(method.getRequestStreaming());
    coreMethodBuilder.setResponseStreaming(method.getResponseStreaming());
    coreMethodBuilder.addAllOptions(
        DescriptorNormalization.getMethodOptions(
            method.getOptionFields(),
            false,
            includeDefaults));
    coreApiBuilder.addMethods(coreMethodBuilder);
  }

  coreApiBuilder.addAllOptions(
      DescriptorNormalization.getOptions(iface.getProto(), includeDefaults));
  coreApiBuilder.setVersion(iface.getAttribute(VersionAttribute.KEY).majorVersion());
  apis.add(coreApiBuilder.build());
}
 

/**
 * TODO (guptasu): only needed to create hard coded Types (Struct, ListValue, and Value). Check
 * if this can be removed. Create the Protobuf.Type instance from descriptorProto.
 */
private static Type createType(String typeName, DescriptorProto descriptorProto,
    String fileName) {
  Type.Builder coreTypeBuilder = Type.newBuilder().setName(typeName);

  int count = 1;
  for (FieldDescriptorProto fieldProto : descriptorProto.getFieldList()) {
    Field.Kind fieldKind = Field.Kind.valueOf(fieldProto.getType().getNumber());
    Cardinality cardinality = Cardinality.CARDINALITY_OPTIONAL;
    if (fieldProto.getLabel() == Label.LABEL_REPEATED) {
      cardinality = Cardinality.CARDINALITY_REPEATED;
    }
    Field.Builder coreFieldBuilder = Field
        .newBuilder()
        .setName(fieldProto.getName())
        .setNumber(count++)
        .setKind(fieldKind)
        .setCardinality(cardinality);
    if (fieldKind == Kind.TYPE_MESSAGE || fieldKind == Kind.TYPE_ENUM) {
      String typeFullName =
          fieldProto.getTypeName().startsWith(".") ? fieldProto.getTypeName().substring(1)
              : fieldProto.getTypeName();
      coreFieldBuilder.setTypeUrl(TYPE_SERVICE_BASE_URL + typeFullName);
    }
    coreTypeBuilder.addFields(coreFieldBuilder.build());
  }
  coreTypeBuilder.setSourceContext(SourceContext.newBuilder().setFileName(fileName));
  coreTypeBuilder.setSyntax(Syntax.SYNTAX_PROTO3);
  return coreTypeBuilder.build();
}
 

private static Descriptors.FileDescriptor convertToFileDescriptorMap(
    String name,
    String parent,
    Map<String, DescriptorProtos.FileDescriptorProto> inMap,
    Map<String, Descriptors.FileDescriptor> outMap,
    ExtensionRegistry extensionRegistry) {
  if (outMap.containsKey(name)) {
    return outMap.get(name);
  }
  Descriptors.FileDescriptor fd;
  switch (name) {
    case "google/protobuf/descriptor.proto":
      fd = DescriptorProtos.FieldOptions.getDescriptor().getFile();
      break;
    case "google/protobuf/wrappers.proto":
      fd = Int32Value.getDescriptor().getFile();
      break;
    case "google/protobuf/timestamp.proto":
      fd = Timestamp.getDescriptor().getFile();
      break;
    case "google/protobuf/duration.proto":
      fd = Duration.getDescriptor().getFile();
      break;
    case "google/protobuf/any.proto":
      fd = Any.getDescriptor().getFile();
      break;
    case "google/protobuf/api.proto":
      fd = Api.getDescriptor().getFile();
      break;
    case "google/protobuf/empty.proto":
      fd = Empty.getDescriptor().getFile();
      break;
    case "google/protobuf/field_mask.proto":
      fd = FieldMask.getDescriptor().getFile();
      break;
    case "google/protobuf/source_context.proto":
      fd = SourceContext.getDescriptor().getFile();
      break;
    case "google/protobuf/struct.proto":
      fd = Struct.getDescriptor().getFile();
      break;
    case "google/protobuf/type.proto":
      fd = Type.getDescriptor().getFile();
      break;
    default:
      DescriptorProtos.FileDescriptorProto fileDescriptorProto = inMap.get(name);
      if (fileDescriptorProto == null) {
        if (parent == null) {
          throw new IllegalArgumentException(
              String.format("Couldn't find file \"%1s\" in file descriptor set", name));
        }
        throw new IllegalArgumentException(
            String.format("Couldn't find file \"%1s\", imported by \"%2s\"", name, parent));
      }
      List<Descriptors.FileDescriptor> dependencies = new ArrayList<>();
      if (fileDescriptorProto.getDependencyCount() > 0) {
        fileDescriptorProto
            .getDependencyList()
            .forEach(
                dependencyName ->
                    dependencies.add(
                        convertToFileDescriptorMap(
                            dependencyName, name, inMap, outMap, extensionRegistry)));
      }
      try {
        fd =
            Descriptors.FileDescriptor.buildFrom(
                fileDescriptorProto, dependencies.toArray(new Descriptors.FileDescriptor[0]));

      } catch (Descriptors.DescriptorValidationException e) {
        throw new RuntimeException(e);
      }
  }
  outMap.put(name, fd);
  return fd;
}
 

@VisitsBefore
void normalize(MessageType message) {
  Type.Builder coreTypeBuilder = Type.newBuilder().setName(message.getFullName());
  coreTypeBuilder.setSourceContext(
      SourceContext.newBuilder().setFileName(message.getFile().getLocation().getDisplayString()));
  coreTypeBuilder.setSyntax(message.getSyntax());

  for (Field field : message.getReachableFields()) {
    com.google.protobuf.Field.Builder coreFieldBuilder =
        com.google.protobuf.Field.newBuilder()
            .setName(field.getSimpleName())
            .setNumber(field.getNumber())
            .setKind(toCoreFieldKind(field.getProto()))
            .setCardinality(toCoreFieldCardinality(field.getProto()))
            .setJsonName(field.getJsonName());

    if (field.getType().isEnum() || field.getType().isMessage()) {
      coreFieldBuilder.setTypeUrl(generateTypeUrl(field.getType()));
    }

    FieldDescriptorProto proto = field.getProto();

    if (proto.hasOneofIndex()) {
      // Index in the containing type's oneof_decl is zero-based.
      // Index in google.protobuf.type.Field.oneof_index is one-based.
      coreFieldBuilder.setOneofIndex(field.getProto().getOneofIndex() + 1);
    }
    if (proto.getOptions().hasPacked()) {
      coreFieldBuilder.setPacked(proto.getOptions().getPacked());
    } else if (isDefaultPackedEncoding(field)) {
      coreFieldBuilder.setPacked(true);
    }
    if (proto.hasDefaultValue()) {
      coreFieldBuilder.setDefaultValue(proto.getDefaultValue());
    }
    coreFieldBuilder.addAllOptions(
        DescriptorNormalization.getOptions(field.getProto(), includeDefaults));
    coreTypeBuilder.addFields(coreFieldBuilder.build());
  }

  coreTypeBuilder.addAllOptions(
      DescriptorNormalization.getOptions(message.getProto(), includeDefaults));
  coreTypeBuilder.addAllOneofs(DescriptorNormalization.getOneofs(message.getProto()));
  types.add(coreTypeBuilder.build());
}