Shuyi Chen | d7955ce | 2013-05-22 14:51:55 -0700 | [diff] [blame] | 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 | |
| 21 | package org.jivesoftware.smack.filter; |
| 22 | |
| 23 | import org.jivesoftware.smack.packet.Packet; |
| 24 | |
| 25 | /** |
| 26 | * Filters for packets of a particular type. The type is given as a Class object, so |
| 27 | * example types would: |
| 28 | * <ul> |
| 29 | * <li><tt>Message.class</tt> |
| 30 | * <li><tt>IQ.class</tt> |
| 31 | * <li><tt>Presence.class</tt> |
| 32 | * </ul> |
| 33 | * |
| 34 | * @author Matt Tucker |
| 35 | */ |
| 36 | public class PacketTypeFilter implements PacketFilter { |
| 37 | |
| 38 | Class<? extends Packet> packetType; |
| 39 | |
| 40 | /** |
| 41 | * Creates a new packet type filter that will filter for packets that are the |
| 42 | * same type as <tt>packetType</tt>. |
| 43 | * |
| 44 | * @param packetType the Class type. |
| 45 | */ |
| 46 | public PacketTypeFilter(Class<? extends Packet> packetType) { |
| 47 | // Ensure the packet type is a sub-class of Packet. |
| 48 | if (!Packet.class.isAssignableFrom(packetType)) { |
| 49 | throw new IllegalArgumentException("Packet type must be a sub-class of Packet."); |
| 50 | } |
| 51 | this.packetType = packetType; |
| 52 | } |
| 53 | |
| 54 | public boolean accept(Packet packet) { |
| 55 | return packetType.isInstance(packet); |
| 56 | } |
| 57 | |
| 58 | public String toString() { |
| 59 | return "PacketTypeFilter: " + packetType.getName(); |
| 60 | } |
| 61 | } |