org.eclipse.rdf4j.common.iterator

Class UnionIterator<E>

java.lang.Object

org.eclipse.rdf4j.common.iterator.AbstractCloseableIterator<E>

org.eclipse.rdf4j.common.iterator.LookAheadIterator<E>

org.eclipse.rdf4j.common.iterator.UnionIterator<E>

All Implemented Interfaces:

Closeable, AutoCloseable, Iterator<E>

public class UnionIterator<E>
extends LookAheadIterator<E>

Author:

MJAHale

Constructor Summary

Constructors

Constructor and Description
UnionIterator(Iterable<? extends E>... args) Creates a new UnionIterator that returns the bag union of the results of a number of Iterators.
UnionIterator(Iterable<? extends Iterable<? extends E>> args)

Method Summary

Modifier and Type	Method and Description
protected E	getNextElement() Gets the next element.
protected void	handleClose() Called by AbstractCloseableIterator.close() when it is called for the first time.

Methods inherited from class org.eclipse.rdf4j.common.iterator.LookAheadIterator

handleAlreadyClosed, hasNext, next, remove

Methods inherited from class org.eclipse.rdf4j.common.iterator.AbstractCloseableIterator

close, isClosed

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Detail

UnionIterator

public UnionIterator(Iterable<? extends E>... args)

Creates a new UnionIterator that returns the bag union of the results of a number of Iterators.

Parameters:

args - The Iterators containing the elements to iterate over.

UnionIterator

public UnionIterator(Iterable<? extends Iterable<? extends E>> args)

Method Detail

getNextElement

protected E getNextElement()

Description copied from class: LookAheadIterator

Gets the next element. Subclasses should implement this method so that it returns the next element.

Specified by:

getNextElement in class LookAheadIterator<E>

Returns:

The next element, or null if no more elements are available.

handleClose

protected void handleClose()
                    throws IOException

Description copied from class: AbstractCloseableIterator

Called by AbstractCloseableIterator.close() when it is called for the first time. This method is only called once on each iteration. By default, this method does nothing.

Overrides:

handleClose in class LookAheadIterator<E>

Throws:

IOException