static List getKeysFromMessage()

in grpc-gcp/src/main/java/com/google/cloud/grpc/GcpManagedChannel.java [1540:1573]

29 lines of code
13 McCabe index (conditional complexity)


  static List<String> getKeysFromMessage(MessageOrBuilder msg, String name) {
    // The field names in a nested message name are splitted by '.'.
    int currentLength = name.indexOf('.');
    String currentName = name;
    if (currentLength != -1) {
      currentName = name.substring(0, currentLength);
    }

    List<String> keys = new ArrayList<>();
    Map<FieldDescriptor, Object> obs = msg.getAllFields();
    for (Map.Entry<FieldDescriptor, Object> entry : obs.entrySet()) {
      if (entry.getKey().getName().equals(currentName)) {
        if (currentLength == -1 && entry.getValue() instanceof String) {
          // Value of the current field.
          keys.add(entry.getValue().toString());
        } else if (currentLength != -1 && entry.getValue() instanceof MessageOrBuilder) {
          // One nested MessageOrBuilder.
          keys.addAll(
              getKeysFromMessage(
                  (MessageOrBuilder) entry.getValue(), name.substring(currentLength + 1)));
        } else if (currentLength != -1 && entry.getValue() instanceof List) {
          // Repeated nested MessageOrBuilder.
          List<?> list = (List<?>) entry.getValue();
          if (!list.isEmpty() && list.get(0) instanceof MessageOrBuilder) {
            for (Object item : list) {
              keys.addAll(
                  getKeysFromMessage((MessageOrBuilder) item, name.substring(currentLength + 1)));
            }
          }
        }
      }
    }
    return keys;
  }