| ObjectValuePairComparator.java |
1 /**
2 * Copyright (c) 2000-2009 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 }