/*
* 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());
}
};
}
}