SKHolmes commented on issue #27753:
URL: https://github.com/apache/beam/issues/27753#issuecomment-1660768368
After some refactoring I have run into some weird behavior.
```
public MessageParser() {
Map<MessageType, TupleTag<Message>> messageTypeMap = new HashMap<>();
List<TupleTag<Message>> tempList = new
ArrayList<TupleTag<Message>>();
TupleTagList tempTags = TupleTagList.empty();
EnumSet.allOf(MessageType.class)
.forEach(messageType -> {
TupleTag<Message> t = new TupleTag<Message>(){};
messageTypeMap.put(messageType, t);
tempList.add(t);
tempTags.and(t);
});
System.out.print("tags: ");
System.out.println(tempTags.getAll());
System.out.println(tempList);
this.tags = tempTags;
this.messageTypeMap = messageTypeMap;
this.defaultTupleTag = new TupleTag<Message>(){};
}
```
The above prints,
> tags: []
[Tag<com.example.transforms.MessageParser$1.<init>:30#20ff67585e33a8f6>,
Tag<com.example.transforms.MessageParser$1.<init>:30#2587af97b4865538>]
I have looked into the TupleTagList source and I don't know why it would be
behaving like this. By all means it should be adding to it's inner List with
_.and()_ and should be returning that list with _getAll()_.
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