Reuven Lax created BEAM-2304:
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Summary: State API cannot recognize State superclases
Key: BEAM-2304
URL: https://issues.apache.org/jira/browse/BEAM-2304
Project: Beam
Issue Type: Bug
Components: sdk-java-core
Reporter: Reuven Lax
Assignee: Kenneth Knowles
The following code:
@StateId("foo")
private final StateSpec<CombiningState<Integer, int[], Integer>>
state =
StateSpecs.combining(Sum.ofIntegers());
@ProcessElement
public void processElement(ProcessContext c,
@StateId("foo") GroupingState<Integer,
Integer> state) {
}
Fails with:
parameter of type GroupingState<Integer, Integer> at index 1: reference to
StateId exists with different type CombiningState<Integer, int[], Integer>
However since GroupingState<Integer, Integer> is the base class, ideally this
should work - and would make the API easier to use if it did.
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