RanJinh commented on code in PR #23000:
URL: https://github.com/apache/flink/pull/23000#discussion_r1267862410
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flink-core/src/main/java/org/apache/flink/api/common/functions/Function.java:
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@@ -27,4 +28,16 @@
* method) interfaces that can be implemented via Java 8 lambdas.
*/
@Public
-public interface Function extends java.io.Serializable {}
+public interface Function extends java.io.Serializable {
+ /** Returns true iff the operator can only emit records after inputs have
reached EOF. */
+ @Internal
+ default boolean isOutputEOF() {
Review Comment:
Thanks for your comments! I simply want to provide a method for user defined
function to determine the OperatorAttribute directly. Indeed, it does not make
sense to connect `Function` and `OperatorAttribute` together. I will modify
this later.
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