/*
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 Aug 7, 2008
*/
package com.bigdata.striterator;
import java.util.Iterator;
import com.bigdata.btree.ITupleIterator;
//import com.bigdata.btree.filter.IFilter;
/**
* Chunked streaming iterator.
*
* @todo Like the {@link ITupleIterator}, the {@link IChunkedIterator}s can be
* executed on the server and them stream results back to the client. We
* really need to introduce custom compression for chunk-at-a-time results
* streamed back from the server. If the filters are to be specified on
* the client and applied on the server, then an
* {@link IFilter} will be needed to construct the filter stack
* on the server.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class ChunkedStriterator<I extends IChunkedIterator<E>, E> extends
Striterator<I, E> implements IChunkedStriterator<I, E> {
public ChunkedStriterator(final I src) {
super(src);
this.src = src;
}
/**
* Wraps the source iterator as a chunked iterator using a default chunk
* size.
*
* @param src
* The source iterator.
*/
public ChunkedStriterator(final Iterator<E> src) {
this(IChunkedIterator.DEFAULT_CHUNK_SIZE, src);
}
/**
* Wraps the source iterator as a chunked iterator.
*
* @param chunkSize
* The chunk size.
* @param src
* The source iterator.
*/
@SuppressWarnings("unchecked")
public ChunkedStriterator(final int chunkSize, final Iterator<E> src) {
this((I) new ChunkedWrappedIterator<E>(src, chunkSize,
null/* keyOrder */, null/* filter */));
}
@Override
final public E[] nextChunk() {
return src.nextChunk();
}
// @Override
// final public void close() {
//
// ((ICloseableIterator<?>) src).close();
//
// }
/**
* Strengthened return type.
*/
@Override
public IChunkedStriterator<I, E> addFilter(final IFilter<I, ?, E> filter) {
return (IChunkedStriterator<I, E>) super.addFilter(filter);
}
}