/*
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Created on Sep 18, 2009
*/
package com.bigdata.striterator;
import java.util.Iterator;
import cutthecrap.utils.striterators.ICloseable;
import cutthecrap.utils.striterators.ICloseableIterator;
/**
* A fly weight conversion that wraps a normal {@link IChunkedIterator} as an
* {@link ICloseableIterator} visiting the source iterator's chunks, i.e., this
* converts between an {@link IChunkedIterator} and an {@link Iterator} visiting
* chunks.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id: CloseableIteratorWrapper.java 7396 2013-09-12 13:53:51Z
* thompsonbry $
* @param <E>
* The generic type of the chunk elements in the source iterator.
*
* @see Dechunkerator
*/
public class CloseableChunkedIteratorWrapperConverter<E> implements
ICloseableIterator<E[]> {
private final IChunkedIterator<E> src;
public CloseableChunkedIteratorWrapperConverter(
final IChunkedIterator<E> src) {
if (src == null)
throw new IllegalArgumentException();
this.src = src;
}
/** Delegate to the source iff the source implements {@link ICloseable}. */
@Override
public void close() {
if (src instanceof ICloseable) {
((ICloseable) src).close();
}
}
@Override
public boolean hasNext() {
return src.hasNext();
}
@Override
public E[] next() {
return src.nextChunk();
}
@Override
public void remove() {
src.remove();
}
}