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