/* * Copyright (C) 2003-2010 eXo Platform SAS. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Affero General Public License * as published by the Free Software Foundation; either version 3 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see<http://www.gnu.org/licenses/>. */ package org.exoplatform.social.core.activity.model; import java.util.Comparator; /** * Util class for activity * * @author <a href="http://hoatle.net">hoatle (hoatlevan at gmail dot com)</a> * @since Aug 9, 2010 * @copyright eXo SAS */ public class Util { /** * Comparator used to order the activity by postedTime * @return */ public static Comparator<ExoSocialActivity> activityComparator() { return new Comparator<ExoSocialActivity>() { public int compare(ExoSocialActivity a1, ExoSocialActivity a2) { if (a1 == null || a2 == null) { throw new IllegalArgumentException("Cannot compare null Activity"); } return a2.getPostedTime().compareTo(a1.getPostedTime()); } }; } }