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/*

Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016.  All rights reserved.

Contact:
     SYSTAP, LLC DBA Blazegraph
     2501 Calvert ST NW #106
     Washington, DC 20008
     [email protected]

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 Bryan Thompson
 */
public class LongAggregator implements IResultHandler {

    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();

    }

}