1 /** 2 * $RCSfile$ 3 * $Revision: $ 4 * $Date$ 5 * 6 * Copyright 2003-2006 Jive Software. 7 * 8 * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License"); 9 * you may not use this file except in compliance with the License. 10 * You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 21 package org.jivesoftware.smackx.muc; 22 23 import org.jivesoftware.smack.PacketInterceptor; 24 import org.jivesoftware.smack.packet.Packet; 25 import org.jivesoftware.smack.packet.PacketExtension; 26 import org.jivesoftware.smack.packet.Presence; 27 28 /** 29 * Packet interceptor that will intercept presence packets sent to the MUC service to indicate 30 * that the user wants to be a deaf occupant. A user can only indicate that he wants to be a 31 * deaf occupant while joining the room. It is not possible to become deaf or stop being deaf 32 * after the user joined the room.<p> 33 * 34 * Deaf occupants will not get messages broadcasted to all room occupants. However, they will 35 * be able to get private messages, presences, IQ packets or room history. To use this 36 * functionality you will need to send the message 37 * {@link MultiUserChat#addPresenceInterceptor(org.jivesoftware.smack.PacketInterceptor)} and 38 * pass this interceptor as the parameter.<p> 39 * 40 * Note that this is a custom extension to the MUC service so it may not work with other servers 41 * than Wildfire. 42 * 43 * @author Gaston Dombiak 44 */ 45 public class DeafOccupantInterceptor implements PacketInterceptor { 46 interceptPacket(Packet packet)47 public void interceptPacket(Packet packet) { 48 Presence presence = (Presence) packet; 49 // Check if user is joining a room 50 if (Presence.Type.available == presence.getType() && 51 presence.getExtension("x", "http://jabber.org/protocol/muc") != null) { 52 // Add extension that indicates that user wants to be a deaf occupant 53 packet.addExtension(new DeafExtension()); 54 } 55 } 56 57 private static class DeafExtension implements PacketExtension { 58 getElementName()59 public String getElementName() { 60 return "x"; 61 } 62 getNamespace()63 public String getNamespace() { 64 return "http://jivesoftware.org/protocol/muc"; 65 } 66 toXML()67 public String toXML() { 68 StringBuilder buf = new StringBuilder(); 69 buf.append("<").append(getElementName()).append(" xmlns=\"").append(getNamespace()) 70 .append("\">"); 71 buf.append("<deaf-occupant/>"); 72 buf.append("</").append(getElementName()).append(">"); 73 return buf.toString(); 74 } 75 } 76 } 77