001/**
002 *
003 * Copyright 2003-2007 Jive Software.
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.jivesoftware.smackx.muc;
019
020import org.jxmpp.jid.EntityFullJid;
021
022/**
023 * A listener that is fired anytime a MUC room changes its subject.
024 *
025 * @author Gaston Dombiak
026 */
027public interface SubjectUpdatedListener {
028
029    /**
030     * Called when a MUC room has changed its subject.
031     *
032     * @param subject the new room's subject.
033     * @param from the user that changed the room's subject or <code>null</code> if the room itself changed the subject.
034     */
035    void subjectUpdated(String subject, EntityFullJid from);
036
037}