| MessageThreadComparator.java |
1 /**
2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3 *
4 * The contents of this file are subject to the terms of the Liferay Enterprise
5 * Subscription License ("License"). You may not use this file except in
6 * compliance with the License. You can obtain a copy of the License by
7 * contacting Liferay, Inc. See the License for the specific language governing
8 * permissions and limitations under the License, including but not limited to
9 * distribution rights of the Software.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
12 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
14 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
15 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17 * SOFTWARE.
18 */
19
20 package com.liferay.portlet.messageboards.util.comparator;
21
22 import com.liferay.portal.kernel.util.DateUtil;
23 import com.liferay.portlet.messageboards.model.MBMessage;
24
25 import java.io.Serializable;
26
27 import java.util.Comparator;
28
29 /**
30 * <a href="MessageThreadComparator.java.html"><b><i>View Source</i></b></a>
31 *
32 * @author Brian Wing Shun Chan
33 *
34 */
35 public class MessageThreadComparator
36 implements Comparator<MBMessage>, Serializable {
37
38 public int compare(MBMessage msg1, MBMessage msg2) {
39 Long parentMessageId1 = new Long(msg1.getParentMessageId());
40 Long parentMessageId2 = new Long(msg2.getParentMessageId());
41
42 int value = parentMessageId1.compareTo(parentMessageId2);
43
44 if (value == 0) {
45 value = DateUtil.compareTo(
46 msg1.getCreateDate(), msg2.getCreateDate());
47 }
48
49 if (value == 0) {
50 Long messageId1 = new Long(msg1.getMessageId());
51 Long messageId2 = new Long(msg2.getMessageId());
52
53 value = messageId1.compareTo(messageId2);
54 }
55
56 return value;
57 }
58
59 }