| 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.dao.db.DB;
26 import com.liferay.portal.kernel.dao.db.DBFactoryUtil;
27 import com.liferay.portal.kernel.util.DateUtil;
28 import com.liferay.portal.kernel.util.OrderByComparator;
29 import com.liferay.portlet.messageboards.model.MBThread;
30
31 import java.util.Date;
32
33 /**
34 * <a href="ThreadLastPostDateComparator.java.html"><b><i>View Source</i></b>
35 * </a>
36 *
37 * @author Brian Wing Shun Chan
38 */
39 public class ThreadLastPostDateComparator extends OrderByComparator {
40
41 public static String ORDER_BY_ASC = "lastPostDate ASC, threadId ASC";
42
43 public static String ORDER_BY_DESC = "lastPostDate DESC, threadId DESC";
44
45 public static String[] ORDER_BY_FIELDS = {"lastPostDate, threadId"};
46
47 public ThreadLastPostDateComparator() {
48 this(false);
49 }
50
51 public ThreadLastPostDateComparator(boolean asc) {
52 _asc = asc;
53 }
54
55 public int compare(Object obj1, Object obj2) {
56 MBThread thread1 = (MBThread)obj1;
57 MBThread thread2 = (MBThread)obj2;
58
59 Date lastPostDate1 = thread1.getLastPostDate();
60 Date lastPostDate2 = thread2.getLastPostDate();
61
62 boolean ignoreMilliseconds = false;
63
64 DB db = DBFactoryUtil.getDB();
65
66 if (!db.isSupportsDateMilliseconds()) {
67 ignoreMilliseconds = true;
68 }
69
70 int value = DateUtil.compareTo(
71 lastPostDate1, lastPostDate2, ignoreMilliseconds);
72
73 if (value == 0) {
74 if (thread1.getThreadId() < thread2.getThreadId()) {
75 value = -1;
76 }
77 else if (thread1.getThreadId() > thread2.getThreadId()) {
78 value = 1;
79 }
80 }
81
82 if (_asc) {
83 return value;
84 }
85 else {
86 return -value;
87 }
88 }
89
90 public String getOrderBy() {
91 if (_asc) {
92 return ORDER_BY_ASC;
93 }
94 else {
95 return ORDER_BY_DESC;
96 }
97 }
98
99 public String[] getOrderByFields() {
100 return ORDER_BY_FIELDS;
101 }
102
103 public boolean isAscending() {
104 return _asc;
105 }
106
107 private boolean _asc;
108
109 }