Package no.digipost.collection

Class EnforceAtMostOneElementCollector<T>

java.lang.Object

no.digipost.collection.EnforceAtMostOneElementCollector<T>

All Implemented Interfaces:

Collector<T,OneTimeAssignment<T>,Optional<T>>, EmptyResultIfEmptySourceCollector<T,OneTimeAssignment<T>,T>

public class EnforceAtMostOneElementCollector<T>
extends Object
implements EmptyResultIfEmptySourceCollector<T,OneTimeAssignment<T>,T>

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.stream.Collector

Collector.Characteristics

Constructor Summary

Constructors

Constructor	Description
EnforceAtMostOneElementCollector(BiFunction<? super T,? super T,? extends RuntimeException> exceptionOnExcessiveElements)

Method Summary

Modifier and Type	Method	Description
BiConsumer<OneTimeAssignment<T>,T>	accumulator()
Set<Collector.Characteristics>	characteristics()
BinaryOperator<OneTimeAssignment<T>>	combiner()
Function<OneTimeAssignment<T>,Optional<T>>	finisher()
Supplier<OneTimeAssignment<T>>	supplier()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

EnforceAtMostOneElementCollector

public EnforceAtMostOneElementCollector(BiFunction<? super T,? super T,? extends RuntimeException> exceptionOnExcessiveElements)

Method Details

supplier

public Supplier<OneTimeAssignment<T>> supplier()

Specified by:

supplier in interface Collector<T,OneTimeAssignment<T>,Optional<T>>

accumulator

public BiConsumer<OneTimeAssignment<T>,T> accumulator()

Specified by:

accumulator in interface Collector<T,OneTimeAssignment<T>,Optional<T>>

combiner

public BinaryOperator<OneTimeAssignment<T>> combiner()

Specified by:

combiner in interface Collector<T,OneTimeAssignment<T>,Optional<T>>

finisher

public Function<OneTimeAssignment<T>,Optional<T>> finisher()

Specified by:

finisher in interface Collector<T,OneTimeAssignment<T>,Optional<T>>

characteristics

public Set<Collector.Characteristics> characteristics()

Specified by:

characteristics in interface Collector<T,OneTimeAssignment<T>,Optional<T>>