Package ch.tocco.nice2.toolbox.api.util

Class StreamUtils

java.lang.Object

ch.tocco.nice2.toolbox.api.util.StreamUtils

public final class StreamUtils
extends Object

Method Summary

Modifier and Type	Method	Description
static <T> Predicate<T>	distinctByKey(Function<? super T,Object> keyExtractor)
static <I, K> Collector<I,List<I>,List<I>>	uniqueByFunction(Function<I,K> uniqueFunction)	collects elements if the result of feeding them through a given function has not already been encountered the order of elements is preserved, so the first element for each occurrence is collected

Methods inherited from class java.lang.Object

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

Method Details

distinctByKey

public static <T> Predicate<T> distinctByKey(Function<? super T,Object> keyExtractor)

uniqueByFunction

public static <I,
K> Collector<I,List<I>,List<I>> uniqueByFunction(Function<I,K> uniqueFunction)

collects elements if the result of feeding them through a given function has not already been encountered the order of elements is preserved, so the first element for each occurrence is collected

Type Parameters:

I - the type of the stream

K - the type of the result of the function

Parameters:

uniqueFunction - the function whose result should be checked for uniqueness

Returns:

the collector