1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.jxpath.util;
19
20 import java.io.Serializable;
21 import java.util.Comparator;
22
23 /**
24 * Reverse comparator.
25 */
26 public final class ReverseComparator implements Comparator, Serializable {
27
28 private static final long serialVersionUID = -2795475743948616649L;
29 /**
30 * Singleton reverse comparator instance.
31 */
32 public static final Comparator INSTANCE = new ReverseComparator();
33
34 /**
35 * Constructs a new ReverseComparator.
36 */
37 private ReverseComparator() {
38 }
39
40 @Override
41 public int compare(final Object o1, final Object o2) {
42 return ((Comparable) o2).compareTo(o1);
43 }
44 }