AbstractEncounterCounter.java :  » Database-JDBC-Connection-Pool » c3p0 » com » mchange » v2 » encounter » Java Open Source

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c3p0 » com » mchange » v2 » encounter » AbstractEncounterCounter.java
/*
 * Distributed as part of c3p0 v.0.9.1.2
 *
 * Copyright (C) 2005 Machinery For Change, Inc.
 *
 * Author: Steve Waldman <swaldman@mchange.com>
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 2.1, as 
 * published by the Free Software Foundation.
 *
 * This software 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this software; see the file LICENSE.  If not, write to the
 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 */


package com.mchange.v2.encounter;

import java.util.Map;

class AbstractEncounterCounter implements EncounterCounter
{
    final static Long ONE = new Long(1);
    Map m;

    AbstractEncounterCounter(Map m)
    { this.m = m; }

    /**
     *  @return how many times have I seen this object before?
     */
    public long encounter(Object o)
    {
  Long oldLong = (Long) m.get(o);
  Long newLong;
  long out;
  if (oldLong == null)
      {
    out = 0;
    newLong = ONE;
      }
  else
      {
    out = oldLong.longValue(); 
    newLong = new Long(out + 1);
      }
  m.put( o, newLong );
  return out;
    }
}
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