MessageThreadComparator.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.portlet.messageboards.model.MBMessage; 27 28 import java.io.Serializable; 29 30 import java.util.Comparator; 31 32 /** 33 * <a href="MessageThreadComparator.java.html"><b><i>View Source</i></b></a> 34 * 35 * @author Brian Wing Shun Chan 36 * 37 */ 38 public class MessageThreadComparator 39 implements Comparator<MBMessage>, Serializable { 40 41 public int compare(MBMessage msg1, MBMessage msg2) { 42 Long parentMessageId1 = new Long(msg1.getParentMessageId()); 43 Long parentMessageId2 = new Long(msg2.getParentMessageId()); 44 45 int value = parentMessageId1.compareTo(parentMessageId2); 46 47 if (value == 0) { 48 value = DateUtil.compareTo( 49 msg1.getCreateDate(), msg2.getCreateDate()); 50 } 51 52 if (value == 0) { 53 Long messageId1 = new Long(msg1.getMessageId()); 54 Long messageId2 = new Long(msg2.getMessageId()); 55 56 value = messageId1.compareTo(messageId2); 57 } 58 59 return value; 60 } 61 62 }