vvcephei commented on a change in pull request #11582: URL: https://github.com/apache/kafka/pull/11582#discussion_r771472556
########## File path: streams/src/main/java/org/apache/kafka/streams/query/QueryResult.java ########## @@ -197,6 +197,18 @@ public R getResult() { return result; } + @SuppressWarnings("unchecked") + public <V> QueryResult<V> swapResult(final V value) { + if (isFailure()) { + return (QueryResult<V>) this; + } else { + final QueryResult<V> result = new QueryResult<>(value); Review comment: What's happening here is that we're turning a `QueryResult<R>` into a `QueryResult<V>`. A concrete example (in fact the only use case) of this is in the MeteredStore, we get back a raw result from the BytesStore and need to deserialize it, so we need to convert the `QueryResult<byte[]>` into a `QueryResult<Integer>` or something. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org