/*
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 Jan 24, 2008
*/
package com.bigdata.btree.proc;
import java.util.concurrent.atomic.AtomicLong;
import com.bigdata.service.Split;
/**
* Aggregates the value of an {@link Long} result.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
*/
public class LongAggregator implements IResultHandler<Long, Long> {
private final AtomicLong counter = new AtomicLong(0);
public LongAggregator() {
}
/**
*
* @todo watch for overflow of {@link Long#MAX_VALUE}
*/
@Override
public void aggregate(final Long result, final Split split) {
counter.addAndGet(result.longValue());
}
@Override
public Long getResult() {
return counter.get();
}
}