Module io.annot8.common.utils

Package io.annot8.common.utils.java

Class StreamUtils

java.lang.Object

io.annot8.common.utils.java.StreamUtils

public final class StreamUtils
extends Object

Utilities for working with streams

Method Summary

Modifier and Type	Method	Description
static <T> Stream<T>	append(Stream<T> stream, T... objects)
static <T,S extends T> Stream<S>	cast(Stream<T> stream, Class<S> clazz)	Filter out items in the stream that aren't a subclass of clazz
static <T> Stream<T>	getIfPresent(Stream<Optional<T>> stream)	Extract optional which are present

Methods inherited from class java.lang.Object

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

Method Detail

cast

public static <T,S extends T> Stream<S> cast(Stream<T> stream,
                                                   Class<S> clazz)

Filter out items in the stream that aren't a subclass of clazz

Type Parameters:

T - input of the stream

S - output of the stream

Parameters:

stream - the stream

clazz - the class to filter and cast on on

Returns:

stream of just clazz implementations

getIfPresent

public static <T> Stream<T> getIfPresent(Stream<Optional<T>> stream)

Extract optional which are present

Type Parameters:

T - content of stream

Parameters:

stream - the stream

Returns:

stream of non-null (present optionals)

append

public static <T> Stream<T> append(Stream<T> stream,
                                   T... objects)