Package com.linkedin.alpini.base.misc

Class IteratorUtil

java.lang.Object

com.linkedin.alpini.base.misc.IteratorUtil

public final class IteratorUtil
extends Object

Utility methods for Iterators.

Method Summary

Modifier and Type	Method	Description
static <T> Iterator<T>	concat(Iterator<T>... source)
static int	count(Iterator<?> iterator)
static <E> Iterator<E>	empty()
static <T> Iterator<T>	filter(Iterator<T> iterator, Predicate<? super T> filter)
static <T, R> Iterator<R>	flatMap(Iterator<T> iterator, Function<? super T,Iterator<? extends R>> mapper)
static <T, R> Iterator<R>	map(Iterator<T> iterator, Function<? super T,? extends R> mapper)
static <E> Iterator<E>	of(E... elements)
static <E> Iterator<E>	singleton(E element)
static <T> Spliterator<T>	spliterator(Iterator<T> iterator)
static <T> Stream<T>	stream(Iterator<T> iterator)
static <T> List<T>	toList(Iterator<T> iterator)

Methods inherited from class java.lang.Object

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

Method Details

empty

public static <E> Iterator<E> empty()

singleton

public static <E> Iterator<E> singleton(E element)

of

@SafeVarargs
public static <E> Iterator<E> of(E... elements)

count

public static int count(Iterator<?> iterator)

concat

@SafeVarargs
public static <T> Iterator<T> concat(Iterator<T>... source)

map

public static <T,
R> Iterator<R> map(Iterator<T> iterator,
 Function<? super T,? extends R> mapper)

flatMap

public static <T,
R> Iterator<R> flatMap(Iterator<T> iterator,
 Function<? super T,Iterator<? extends R>> mapper)

filter

public static <T> Iterator<T> filter(Iterator<T> iterator,
 Predicate<? super T> filter)

spliterator

public static <T> Spliterator<T> spliterator(Iterator<T> iterator)

stream

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

toList

public static <T> List<T> toList(Iterator<T> iterator)