ResultSelector

public interface ResultSelector<T> implements Collector<T, List<T>, Optional<T>>

Represents an interface that extracts a result from a list. Meant to be used as a collection operation on a stream.

Parameters

<T>

the type of the result to extract

Functions

accumulator

BiConsumer<List<T>, T> accumulator()

characteristics

Set<Collector.Characteristics> characteristics()

combiner

BinaryOperator<List<T>> combiner()

finisher

Function<List<T>, Optional<T>> finisher()

of

static Collector<T, R, R> of<T, R>(Supplier<R> supplier, BiConsumer<R, T> accumulator, BinaryOperator<R> combiner, Array<Collector.Characteristics> characteristics)

static Collector<T, A, R> of<T, A, R>(Supplier<A> supplier, BiConsumer<A, T> accumulator, BinaryOperator<A> combiner, Function<A, R> finisher, Array<Collector.Characteristics> characteristics)

select

abstract Optional<T> select(List<T> results)

Extracts a result from the list.

supplier

Supplier<List<T>> supplier()