public class IteratorIterable<E> extends Object implements Iterable<E>
Iterator instance appear to be an
Iterable instance. The iterable can be constructed in one
of two variants: single use, multiple use.
In the single use iterable case, the iterable is only usable for one
iterative operation over the source iterator. Subsequent iterative
operations use the same, exhausted source iterator. To create a single use
iterable, construct a new IteratorIterable using a Iterator
that is NOT a ResettableIterator iterator:
Iterator<Integer> iterator = // some non-resettable iterator Iterable<Integer> iterable = new IteratorIterable<Integer>(iterator);
In the multiple use iterable case, the iterable is usable for any number of
iterative operations over the source iterator. Of special note, even though
the iterable supports multiple iterations, it does not support concurrent
iterations. To implicitly create a multiple use iterable, construct a new
IteratorIterable using a ResettableIterator iterator:
Integer[] array = {Integer.valueOf(1),Integer.valueOf(2),Integer.valueOf(3)};
Iterator<Integer> iterator = IteratorUtils.arrayIterator(array); // a resettable iterator
Iterable<Integer> iterable = new IteratorIterable<Integer>(iterator);
A multiple use iterable can also be explicitly constructed using any
Iterator and specifying true for the
multipleUse flag:
Iterator<Integer> iterator = // some non-resettable iterator Iterable<Integer> iterable = new IteratorIterable<Integer>(iterator, true);
| Constructor and Description |
|---|
IteratorIterable(Iterator<? extends E> iterator)
Constructs a new
IteratorIterable that will use the given
iterator. |
IteratorIterable(Iterator<? extends E> iterator,
boolean multipleUse)
Constructs a new
IteratorIterable that will use the given
iterator. |
| Modifier and Type | Method and Description |
|---|---|
Iterator<E> |
iterator()
Gets the iterator wrapped by this iterable.
|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitforEach, spliteratorpublic IteratorIterable(Iterator<? extends E> iterator)
IteratorIterable that will use the given
iterator.iterator - the iterator to use.public IteratorIterable(Iterator<? extends E> iterator, boolean multipleUse)
IteratorIterable that will use the given
iterator.iterator - the iterator to use.multipleUse - true if the new iterable can be used in multiple iterationsCopyright © 2001–2019 The Apache Software Foundation. All rights reserved.