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https://issues.apache.org/jira/browse/FLINK-3869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aljoscha Krettek closed FLINK-3869.
-----------------------------------
Resolution: Fixed
Fix Version/s: 1.2.0
Resolved in 698e53e473fa0f78ed1e23716a50adc914563754
> WindowedStream.apply with FoldFunction is too restrictive
> ---------------------------------------------------------
>
> Key: FLINK-3869
> URL: https://issues.apache.org/jira/browse/FLINK-3869
> Project: Flink
> Issue Type: Improvement
> Components: Streaming
> Reporter: Aljoscha Krettek
> Assignee: Yassine Marzougui
> Fix For: 1.2.0
>
>
> Right now we have this signature:
> {code}
> public <R> SingleOutputStreamOperator<R> apply(R initialValue,
> FoldFunction<T, R> foldFunction, WindowFunction<R, R, K, W> function) {
> {code}
> but we should have this signature to allow users to return a type other than
> the fold accumulator type from their window function:
> {code}
> public <ACC, R> SingleOutputStreamOperator<R> apply(ACC initialValue,
> FoldFunction<T, ACC> foldFunction, WindowFunction<ACC, R, K, W> function) {
> {code}
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