LRUMap.java

/*
 * Copyright 2009 Rodrigo Reyes reyes.rr at gmail dot com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */
package net.kornr.swit.util;

import java.util.LinkedHashMap;

public class LRUMap<K,V> extends LinkedHashMap<K, V> 
{
	private int m_maxsize;
	
	public LRUMap(int maxsize)
	{
		m_maxsize = maxsize;
	}

	@Override
	protected boolean removeEldestEntry(java.util.Map.Entry<K, V> eldest) {
		if (this.size() > m_maxsize)
		{
			onRemove(eldest);
			return true;
		}
		return false;
	}
	
	protected void onRemove(java.util.Map.Entry<K, V> entry)
	{
	}
	
}