KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > jivesoftware > smack > filter > FromMatchesFilter


1 /**
2  * $RCSfile$
3  * $Revision: 2521 $
4  * $Date: 2005-08-10 01:49:54 -0300 (Wed, 10 Aug 2005) $
5  *
6  * Copyright 2003-2004 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 import org.jivesoftware.smack.util.StringUtils;
25
26 /**
27  * Filter for packets where the "from" field exactly matches a specified JID. If the specified
28  * address is a bare JID then the filter will match any address whose bare JID matches the
29  * specified JID. But if the specified address is a full JID then the filter will only match
30  * if the sender of the packet matches the specified resource.
31  *
32  * @author Gaston Dombiak
33  */
34 public class FromMatchesFilter implements PacketFilter {
35
36     private String JavaDoc address;
37     /**
38      * Flag that indicates if the checking will be done against bare JID addresses or full JIDs.
39      */
40     private boolean matchBareJID = false;
41
42     /**
43      * Creates a "from" filter using the "from" field part. If the specified address is a bare JID
44      * then the filter will match any address whose bare JID matches the specified JID. But if the
45      * specified address is a full JID then the filter will only match if the sender of the packet
46      * matches the specified resource.
47      *
48      * @param address the from field value the packet must match. Could be a full or bare JID.
49      */
50     public FromMatchesFilter(String JavaDoc address) {
51         if (address == null) {
52             throw new IllegalArgumentException JavaDoc("Parameter cannot be null.");
53         }
54         this.address = address.toLowerCase();
55         matchBareJID = "".equals(StringUtils.parseResource(address));
56     }
57
58     public boolean accept(Packet packet) {
59         if (packet.getFrom() == null) {
60             return false;
61         }
62         else if (matchBareJID) {
63             // Check if the bare JID of the sender of the packet matches the specified JID
64 return packet.getFrom().toLowerCase().startsWith(address);
65         }
66         else {
67             // Check if the full JID of the sender of the packet matches the specified JID
68 return address.equals(packet.getFrom().toLowerCase());
69         }
70     }
71 }
72
Popular Tags