LRUCache.java

/*
 * Copyright 2015-2016 OpenCB
 *
 * 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 org.opencb.opencga.core.tools.accession;

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

/**
 *
 * @author Cristina Yenyxe Gonzalez Garcia <cyenyxe@ebi.ac.uk>
 */
public class LRUCache <K, V> extends LinkedHashMap <K, V> {
 
    private final int capacity; // Maximum number of items in the cache.
     
    public LRUCache(int capacity) {
        super(capacity+1, 1.0f, true); // Pass 'true' for accessOrder.
        this.capacity = capacity;
    }
     
    @Override
    protected boolean removeEldestEntry(Entry entry) {
        return (size() > this.capacity);
    }
}