FifoMap.java

/*******************************************************************************
 * Copyright 2015 Klaus Pfeiffer - klaus@allpiper.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 com.jfastnet.util;

import java.util.LinkedHashMap;
import java.util.Map;

/** @author Klaus Pfeiffer - klaus@allpiper.com */
public class FifoMap<K, V> extends LinkedHashMap<K, V> {

	private int maxEntries;

	public FifoMap(int maxEntries) {
		super(maxEntries * 10 / 7, 0.7f, false);
		this.maxEntries = maxEntries;
	}

	@Override
	protected boolean removeEldestEntry(Map.Entry<K, V> eldest) {
		return size() > maxEntries;
	}
}