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="KeyValuePairComparator.java.html"><b><i>View Source</i></b></a>
29   *
30   * @author Brian Wing Shun Chan
31   *
32   */
33  public class KeyValuePairComparator implements Comparator<KeyValuePair> {
34  
35      public KeyValuePairComparator() {
36          this(true);
37      }
38  
39      public KeyValuePairComparator(boolean asc) {
40          this(true, asc);
41      }
42  
43      public KeyValuePairComparator(boolean byKey, boolean asc) {
44          _byKey = byKey;
45          _asc = asc;
46      }
47  
48      public int compare(KeyValuePair kvp1, KeyValuePair kvp2) {
49          if (_byKey) {
50              String key1 = kvp1.getKey();
51              String key2 = kvp2.getKey();
52  
53              if (_asc) {
54                  return key1.compareTo(key2);
55              }
56              else {
57                  return -(key1.compareTo(key2));
58              }
59          }
60          else {
61              String value1 = kvp1.getValue();
62              String value2 = kvp2.getValue();
63  
64              if (_asc) {
65                  return value1.compareTo(value2);
66              }
67              else {
68                  return -(value1.compareTo(value2));
69              }
70          }
71      }
72  
73      private boolean _byKey;
74      private boolean _asc;
75  
76  }