Package rsp.util

Class StreamUtils

java.lang.Object

rsp.util.StreamUtils

public final class StreamUtils
extends Object

Constructor Summary

Constructors

Constructor	Description
StreamUtils()

Method Summary

Modifier and Type	Method	Description
static <T> Stream<T>	iterate(Iterator<? extends T> iterator)	Converts an Iterator to Stream.
static <T,R> Stream<R>	mapWithIndex(Stream<? extends T> stream, BiFunction<Integer,? super T,? extends R> mapper)	Returns a stream consisting of the results of applying the given two-arguments function to the elements of this stream.
static <T> CompletableFuture<List<T>>	sequence(List<CompletableFuture<T>> listOfCompletableFutures)	Converts a list of CompletableFuture to a CompletableFuture of a list
static <L,R,T> Stream<T>	zip(Stream<L> leftStream, Stream<R> rightStream, BiFunction<L,R,T> combiner)	Zips two streams.
static <T> Stream<Map.Entry<Integer,T>>	zipWithIndex(Stream<? extends T> stream)	Zips the specified stream with its indices.

Methods inherited from class java.lang.Object

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

Constructor Detail

StreamUtils

public StreamUtils()

Method Detail

iterate

public static <T> Stream<T> iterate(Iterator<? extends T> iterator)

Converts an Iterator to Stream.

zip

public static <L,R,T> Stream<T> zip(Stream<L> leftStream,
                                                Stream<R> rightStream,
                                                BiFunction<L,R,T> combiner)

Zips two streams. The resulting stream is truncated to the shorter of the two input streams.

zipWithIndex

public static <T> Stream<Map.Entry<Integer,T>> zipWithIndex(Stream<? extends T> stream)

Zips the specified stream with its indices.

mapWithIndex

public static <T,R> Stream<R> mapWithIndex(Stream<? extends T> stream,
                                                 BiFunction<Integer,? super T,? extends R> mapper)

Returns a stream consisting of the results of applying the given two-arguments function to the elements of this stream. The first argument of the function is the element index and the second one - the element value.

sequence

public static <T> CompletableFuture<List<T>> sequence(List<CompletableFuture<T>> listOfCompletableFutures)

Converts a list of CompletableFuture to a CompletableFuture of a list