View Javadoc

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  package org.apache.commons.jxpath.util;
18  
19  import java.io.Serializable;
20  import java.util.Comparator;
21  
22  /**
23   * Reverse comparator.
24   *
25   * @author Dmitri Plotnikov
26   * @version $Revision: 668329 $ $Date: 2008-06-16 17:59:48 -0400 (Mon, 16 Jun 2008) $
27   */
28  public final class ReverseComparator implements Comparator, Serializable {
29      private static final long serialVersionUID = -2795475743948616649L;
30  
31      /**
32       * Singleton reverse comparator instance.
33       */
34      public static final Comparator INSTANCE = new ReverseComparator();
35  
36      /**
37       * Create a new ReverseComparator.
38       */
39      private ReverseComparator() {
40      }
41  
42      public int compare(Object o1, Object o2) {
43          return ((Comparable) o2).compareTo(o1);
44      }
45  
46  }