de.larssh.utils.collection

Class Streams

java.lang.Object

de.larssh.utils.collection.Streams

public final class Streams
extends Object

This class contains helper methods for Stream.

Method Summary

Modifier and Type	Method and Description
static <T> Stream<Map.Entry<Integer,T>>	indexed(Stream<T> stream) Maps elements of stream to entries with index and the original value.
static <T> Stream<Map.Entry<Long,T>>	indexedLong(Stream<T> stream) Maps elements of stream to entries with index of type long and the original value.

Methods inherited from class java.lang.Object

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

Method Detail

indexed

public static <T> Stream<Map.Entry<Integer,T>> indexed(Stream<T> stream)

Maps elements of stream to entries with index and the original value.

The first elements index is zero. In case of an integer overflow an ArithmeticException is thrown.

Type Parameters:

T - the type of the input stream elements

Parameters:

stream - the input stream

Returns:

the output stream of entries with index and input stream value

Throws:

ArithmeticException - Stream index overflow

indexedLong

public static <T> Stream<Map.Entry<Long,T>> indexedLong(Stream<T> stream)

Maps elements of stream to entries with index of type long and the original value.

The first elements index is zero. In case of an overflow an ArithmeticException is thrown.

Type Parameters:

T - the type of the input stream elements

Parameters:

stream - the input stream

Returns:

the output stream of entries with index of type long and input stream value

Throws:

ArithmeticException - Stream index overflow