Interface UniConstraintCollector<A,​ResultContainer_,​Result_>

    • Method Detail

      • supplier

        Supplier<ResultContainer_> supplier()
        A lambda that creates the result container, one for each group key combination.
        never null
      • accumulator

        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.
        never null, the undo operation. This lambda is called when the fact no longer matches.
      • finisher

        Function<ResultContainer_,​Result_> finisher()
        A lambda that converts the result container into the result.
        null when the result would be invalid, such as maximum value from an empty container.