/*
* The JTS Topology Suite is a collection of Java classes that
* implement the fundamental operations required to validate a given
* geo-spatial data set to a known topological specification.
*
* Copyright (C) 2001 Vivid Solutions
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* For more information, contact:
*
* Vivid Solutions
* Suite #1A
* 2328 Government Street
* Victoria BC V8T 5G5
* Canada
*
* (250)385-6040
* www.vividsolutions.com
*/
package com.vividsolutions.jts.util;
import java.util.*;
/**
* Counts occurences of objects.
*
* @author Martin Davis
*
*/
public class ObjectCounter
{
private Map counts = new HashMap();
public ObjectCounter() {
}
public void add(Object o)
{
Counter counter = (Counter) counts.get(o);
if (counter == null)
counts.put(o, new Counter(1));
else
counter.increment();
}
// TODO: add remove(Object o)
public int count(Object o)
{
Counter counter = (Counter) counts.get(o);
if (counter == null)
return 0;
else
return counter.count();
}
private static class Counter
{
int count = 0;
public Counter()
{
}
public Counter(int count)
{
this.count = count;
}
public int count()
{
return count;
}
public void increment()
{
count++;
}
}
}