Github user StephanEwen commented on the pull request:
https://github.com/apache/flink/pull/872#issuecomment-116528738
I actually like this approach. We had the same discussion for the batch API
and resolved to this, because:
- You can always chain a `FlatMapFunction` with a `partitionCustom()`
request to solve all the above situations.
- This interface allows easy Java8-lambda implementation and it works
well with the type extraction.
- It seems to cover the majority of cases more elegantly, as there is no
need for array wrapping in the user code.
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