[GitHub] flink pull request #2946: [FLINK-5157] Extend AllWindow function metadata

[aljoscha <gi...@git.apache.org>]

Github user aljoscha commented on a diff in the pull request:

    https://github.com/apache/flink/pull/2946#discussion_r103425179
  
    --- Diff: flink-streaming-java/src/main/java/org/apache/flink/streaming/api/datastream/AllWindowedStream.java ---
    @@ -478,6 +581,135 @@ public AllWindowedStream(DataStream<T> input,
     		return input.transform(opName, resultType, operator).forceNonParallel();
     	}
     
    +	/**
    +	 * Applies the given window function to each window. The window function is called for each
    +	 * evaluation of the window for each key individually. The output of the window function is
    +	 * interpreted as a regular non-windowed stream.
    +	 *
    +	 * <p>Arriving data is incrementally aggregated using the given aggregate function. This means
    +	 * that the window function typically has only a single value to process when called.
    +	 *
    +	 * @param aggFunction The aggregate function that is used for incremental aggregation.
    +	 * @param windowFunction The process window function.
    +	 *
    +	 * @return The data stream that is the result of applying the window function to the window.
    +	 *
    +	 * @param <ACC> The type of the AggregateFunction's accumulator
    +	 * @param <V> The type of AggregateFunction's result, and the WindowFunction's input
    +	 * @param <R> The type of the elements in the resulting stream, equal to the
    +	 *            WindowFunction's result type
    +	 */
    +	public <ACC, V, R> SingleOutputStreamOperator<R> aggregate(
    --- End diff --
    
    These should also be `@PublicEvolving`. (I know that the corresponding methods on `WindowedStream` weren't marked like this due to an oversight on the implementers side.) No problem. \U0001f603 


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