/hazelcast/src/main/java/com/hazelcast/impl/concurrentmap/LRUMapEntryComparator.java

 1/*
 2 * Copyright (c) 2008-2013, Hazelcast, Inc. All Rights Reserved.
 3 *
 4 * Licensed under the Apache License, Version 2.0 (the "License");
 5 * you may not use this file except in compliance with the License.
 6 * You may obtain a copy of the License at
 7 *
 8 * http://www.apache.org/licenses/LICENSE-2.0
 9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.hazelcast.impl.concurrentmap;
18
19import com.hazelcast.core.MapEntry;
20
21import java.util.Comparator;
22
23public class LRUMapEntryComparator implements Comparator<MapEntry> {
24    public int compare(MapEntry r1, MapEntry r2) {
25        final long t1 = Math.max(r1.getLastAccessTime(), Math.max(r1.getLastUpdateTime(), r1.getCreationTime()));
26        final long t2 = Math.max(r2.getLastAccessTime(), Math.max(r2.getLastUpdateTime(), r2.getCreationTime()));
27        return t1 > t2 ? 1 : t1 == t2 ? 0 : -1;
28    }
29}