A
- the type of the one and only fact of the tuple in the source UniConstraintStream
ResultContainer_
- the mutable accumulation type (often hidden as an implementation detail)Result_
- the type of the fact of the tuple in the destination ConstraintStream
public interface UniConstraintCollector<A,ResultContainer_,Result_>
ConstraintCollectors
.
Used by UniConstraintStream.groupBy(Function, UniConstraintCollector)
, ...
Loosely based on JDK's Collector
, but it returns an undo operation for each accumulation
to enable incremental score calculation in constraint streams
.
ConstraintCollectors
Modifier and Type | Method and Description |
---|---|
BiFunction<ResultContainer_,A,Runnable> |
accumulator()
A lambda that extracts data from the matched fact,
accumulates it in the result container
and returns an undo operation for that accumulation.
|
Function<ResultContainer_,Result_> |
finisher()
A lambda that converts the result container into the result.
|
Supplier<ResultContainer_> |
supplier()
A lambda that creates the result container, one for each group key combination.
|
Supplier<ResultContainer_> supplier()
BiFunction<ResultContainer_,A,Runnable> accumulator()
Function<ResultContainer_,Result_> finisher()
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