1   /**
2    * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.kernel.util;
24  
25  import java.util.Comparator;
26  
27  /**
28   * <a href="ObjectValuePairComparator.java.html"><b><i>View Source</i></b></a>
29   *
30   * @author Brian Wing Shun Chan
31   *
32   */
33  public class ObjectValuePairComparator<K, V>
34      implements Comparator<ObjectValuePair<K, V>> {
35  
36      public ObjectValuePairComparator() {
37          this(true);
38      }
39  
40      public ObjectValuePairComparator(boolean asc) {
41          this(true, asc);
42      }
43  
44      public ObjectValuePairComparator(boolean byKey, boolean asc) {
45          _byKey = byKey;
46          _asc = asc;
47      }
48  
49      public int compare(ObjectValuePair<K, V> ovp1, ObjectValuePair<K, V> ovp2) {
50          if (_byKey) {
51              Comparable key1 = (Comparable)ovp1.getKey();
52              Comparable key2 = (Comparable)ovp2.getKey();
53  
54              if (_asc) {
55                  return key1.compareTo(key2);
56              }
57              else {
58                  return -(key1.compareTo(key2));
59              }
60          }
61          else {
62              Comparable value1 = (Comparable)ovp1.getValue();
63              Comparable value2 = (Comparable)ovp2.getValue();
64  
65              if (_asc) {
66                  return value1.compareTo(value2);
67              }
68              else {
69                  return -(value1.compareTo(value2));
70              }
71          }
72      }
73  
74      private boolean _byKey;
75      private boolean _asc;
76  
77  }