com.orientechnologies.common.collection.OLimitedMap Maven / Gradle / Ivy
/*
*
* * Copyright 2014 Orient Technologies LTD (info(at)orientechnologies.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.
* *
* * For more information: http://www.orientechnologies.com
*
*/
package com.orientechnologies.common.collection;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* Implementation of {@link LinkedHashMap} that will remove eldest entries if size limit will be exceeded.
*
* @author Luca Garulli
*/
@SuppressWarnings("serial")
public class OLimitedMap extends LinkedHashMap {
protected final int limit;
public OLimitedMap(final int initialCapacity, final float loadFactor, final int limit) {
super(initialCapacity, loadFactor, true);
this.limit = limit;
}
@Override
protected boolean removeEldestEntry(final Map.Entry eldest) {
return limit > 0 ? size() - limit > 0 : false;
}
}