com.mware.core.util

Class StreamUtil

java.lang.Object

com.mware.core.util.StreamUtil

public class StreamUtil
extends Object

This class contains methods for working with Stream.

Method Summary

Modifier and Type	Method and Description
static <T> Stream<T>	stream(Iterable<T>... iterables) Create a Stream over the elements of the iterables, in order.
static <T> Stream<T>	stream(Iterator<T>... iterators) Create a Stream over the elements of the iterators, in order.
static Stream<Element>	stream(Query... queries) Create a Stream containing the results of executing the queries, in order.
static <T> Stream<T>	streamForIterator(Iterator<T> iterator)
static <T> Collector<T,com.google.common.collect.ImmutableList.Builder<T>,com.google.common.collect.ImmutableList<T>>	toImmutableList()
static <T,K,V> Collector<T,com.google.common.collect.ImmutableMap.Builder<K,V>,com.google.common.collect.ImmutableMap<K,V>>	toImmutableMap(Function<? super T,? extends K> keyMapper, Function<? super T,? extends V> valueMapper)
static <T> Collector<T,com.google.common.collect.ImmutableSet.Builder<T>,com.google.common.collect.ImmutableSet<T>>	toImmutableSet()
static <T,A,R> Collector<T,?,R>	unorderedBatches(int batchSize, Collector<List<T>,A,R> downstream)

Methods inherited from class java.lang.Object

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

Method Detail

stream

public static Stream<Element> stream(Query... queries)

Create a Stream containing the results of executing the queries, in order. The results are not loaded into memory first.

stream

@SafeVarargs
public static <T> Stream<T> stream(Iterable<T>... iterables)

Create a Stream over the elements of the iterables, in order. A list of iterators is first created from the iterables, and passed to stream(Iterator[]). The iterable elements are not loaded into memory first.

stream

@SafeVarargs
public static <T> Stream<T> stream(Iterator<T>... iterators)

Create a Stream over the elements of the iterators, in order. The iterator elements are not loaded into memory first.

streamForIterator

public static <T> Stream<T> streamForIterator(Iterator<T> iterator)

toImmutableList

public static <T> Collector<T,com.google.common.collect.ImmutableList.Builder<T>,com.google.common.collect.ImmutableList<T>> toImmutableList()

toImmutableSet

public static <T> Collector<T,com.google.common.collect.ImmutableSet.Builder<T>,com.google.common.collect.ImmutableSet<T>> toImmutableSet()

toImmutableMap

public static <T,K,V> Collector<T,com.google.common.collect.ImmutableMap.Builder<K,V>,com.google.common.collect.ImmutableMap<K,V>> toImmutableMap(Function<? super T,? extends K> keyMapper,
                                                                                                                                                  Function<? super T,? extends V> valueMapper)

unorderedBatches

public static <T,A,R> Collector<T,?,R> unorderedBatches(int batchSize,
                                                        Collector<List<T>,A,R> downstream)