1/** 2 * $RCSfile$ 3 * $Revision$ 4 * $Date$ 5 * 6 * Copyright 2003-2007 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 21package org.jivesoftware.smack.filter; 22 23import org.jivesoftware.smack.packet.Packet; 24 25/** 26 * Filters for packets with a particular type of packet extension. 27 * 28 * @author Matt Tucker 29 */ 30public class PacketExtensionFilter implements PacketFilter { 31 32 private String elementName; 33 private String namespace; 34 35 /** 36 * Creates a new packet extension filter. Packets will pass the filter if 37 * they have a packet extension that matches the specified element name 38 * and namespace. 39 * 40 * @param elementName the XML element name of the packet extension. 41 * @param namespace the XML namespace of the packet extension. 42 */ 43 public PacketExtensionFilter(String elementName, String namespace) { 44 this.elementName = elementName; 45 this.namespace = namespace; 46 } 47 48 /** 49 * Creates a new packet extension filter. Packets will pass the filter if they have a packet 50 * extension that matches the specified namespace. 51 * 52 * @param namespace the XML namespace of the packet extension. 53 */ 54 public PacketExtensionFilter(String namespace) { 55 this(null, namespace); 56 } 57 58 public boolean accept(Packet packet) { 59 return packet.getExtension(elementName, namespace) != null; 60 } 61} 62