Module pl.tlinkowski.unij.api

Package pl.tlinkowski.unij.api

Class UniCollectors

java.lang.Object

pl.tlinkowski.unij.api.UniCollectors

public final class UniCollectors
extends Object

Provides some Collector factory methods present in Collectors class.

Author:

Tomasz Linkowski

Method Summary

Modifier and Type	Method	Description
static <T,A,R> Collector<T,?,R>	filtering(Predicate<? super T> predicate, Collector<? super T,A,R> downstream)	Equivalent of Collectors.filtering(Predicate, Collector).
static <T,U,A,R> Collector<T,?,R>	flatMapping(Function<? super T,? extends Stream<? extends U>> mapper, Collector<? super U,A,R> downstream)	Equivalent of Collectors.flatMapping(Function, Collector).
static <T> Collector<T,?,List<T>>	toUnmodifiableList()	Equivalent of Collectors.toUnmodifiableList().
static <T,K,V> Collector<T,?,Map<K,V>>	toUnmodifiableMap(Function<? super T,? extends K> keyMapper, Function<? super T,? extends V> valueMapper)	Equivalent of Collectors.toUnmodifiableMap(Function, Function).
static <T,K,V> Collector<T,?,Map<K,V>>	toUnmodifiableMap(Function<? super T,? extends K> keyMapper, Function<? super T,? extends V> valueMapper, BinaryOperator<V> mergeFunction)	Equivalent of Collectors.toUnmodifiableMap(Function, Function, BinaryOperator).
static <T> Collector<T,?,Set<T>>	toUnmodifiableSet()	Equivalent of Collectors.toUnmodifiableSet().

Methods inherited from class java.lang.Object

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

Method Detail

toUnmodifiableList

public static <T> Collector<T,?,List<T>> toUnmodifiableList()

Equivalent of Collectors.toUnmodifiableList().

toUnmodifiableSet

public static <T> Collector<T,?,Set<T>> toUnmodifiableSet()

Equivalent of Collectors.toUnmodifiableSet().

toUnmodifiableMap

public static <T,K,V> Collector<T,?,Map<K,V>> toUnmodifiableMap(Function<? super T,? extends K> keyMapper,
                                                                                              Function<? super T,? extends V> valueMapper)

Equivalent of Collectors.toUnmodifiableMap(Function, Function).

toUnmodifiableMap

public static <T,K,V> Collector<T,?,Map<K,V>> toUnmodifiableMap(Function<? super T,? extends K> keyMapper,
                                                                                              Function<? super T,? extends V> valueMapper,
                                                                                              BinaryOperator<V> mergeFunction)

Equivalent of Collectors.toUnmodifiableMap(Function, Function, BinaryOperator).

flatMapping

public static <T,U,A,R> Collector<T,?,R> flatMapping(Function<? super T,? extends Stream<? extends U>> mapper,
                                                                                   Collector<? super U,A,R> downstream)

Equivalent of Collectors.flatMapping(Function, Collector).

filtering

public static <T,A,R> Collector<T,?,R> filtering(Predicate<? super T> predicate,
                                                                         Collector<? super T,A,R> downstream)

Equivalent of Collectors.filtering(Predicate, Collector).