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 }