| ThreadLastPostDateComparator.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.portlet.messageboards.util.comparator;
24
25 import com.liferay.portal.kernel.util.DateUtil;
26 import com.liferay.portal.kernel.util.OrderByComparator;
27 import com.liferay.portlet.messageboards.model.MBThread;
28
29 import java.util.Date;
30
31 /**
32 * <a href="ThreadLastPostDateComparator.java.html"><b><i>View Source</i></b>
33 * </a>
34 *
35 * @author Brian Wing Shun Chan
36 *
37 */
38 public class ThreadLastPostDateComparator extends OrderByComparator {
39
40 public static String ORDER_BY_ASC = "lastPostDate ASC";
41
42 public static String ORDER_BY_DESC = "lastPostDate DESC";
43
44 public static String[] ORDER_BY_FIELDS = {"lastPostDate"};
45
46 public ThreadLastPostDateComparator() {
47 this(false);
48 }
49
50 public ThreadLastPostDateComparator(boolean asc) {
51 _asc = asc;
52 }
53
54 public int compare(Object obj1, Object obj2) {
55 MBThread thread1 = (MBThread)obj1;
56 MBThread thread2 = (MBThread)obj2;
57
58 Date lastPostDate1 = thread1.getLastPostDate();
59 Date lastPostDate2 = thread2.getLastPostDate();
60
61 if ((lastPostDate1 == null) || (lastPostDate2 == null)) {
62 return 0;
63 }
64
65 int value = DateUtil.compareTo(lastPostDate1, lastPostDate2);
66
67 if (_asc) {
68 return value;
69 }
70 else {
71 return -value;
72 }
73 }
74
75 public String getOrderBy() {
76 if (_asc) {
77 return ORDER_BY_ASC;
78 }
79 else {
80 return ORDER_BY_DESC;
81 }
82 }
83
84 public String[] getOrderByFields() {
85 return ORDER_BY_FIELDS;
86 }
87
88 public boolean isAscending() {
89 return _asc;
90 }
91
92 private boolean _asc;
93
94 }