Package org.kiwiproject.collect

Class KiwiStreams

java.lang.Object

org.kiwiproject.collect.KiwiStreams

public final class KiwiStreams
extends Object

Utilities related to Streams that are not already in the JDKs Stream or Guava's Streams.

Constructor Summary

Constructors

Constructor	Description
KiwiStreams()

Method Summary

Modifier and Type	Method	Description
static <T> Optional<T>	findFirst(Stream<?> stream, Class<T> typeToFind)	Find the first object having the given typeToFind in a stream of objects.
static <T> Optional<T>	findFirst(Stream<?> stream, Class<T> typeToFind, Predicate<T> predicate)	Find the first object having the given typeToFind and matching the supplied predicate in a stream of objects.

Methods inherited from class java.lang.Object

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

Constructor Detail

KiwiStreams

public KiwiStreams()

Method Detail

findFirst

public static <T> Optional<T> findFirst(Stream<?> stream,
                                        Class<T> typeToFind)

Find the first object having the given typeToFind in a stream of objects.

Type Parameters:

T - the type token of the type we want to find

Parameters:

stream - the stream of objects of some (unknown) type

typeToFind - the class of the object to find

Returns:

an Optional containing the first object of the given type, or empty

findFirst

public static <T> Optional<T> findFirst(Stream<?> stream,
                                        Class<T> typeToFind,
                                        Predicate<T> predicate)

Find the first object having the given typeToFind and matching the supplied predicate in a stream of objects.

Type Parameters:

T - the type token of the type we want to find

Parameters:

stream - the stream of objects of some (unknown) type

typeToFind - the class of the object to find

predicate - the condition that must be satisfied for a match to occur

Returns:

an Optional containing the first object of the given type, or empty