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


1 /**
2  * $RCSfile$
3  * $Revision: 2408 $
4  * $Date: 2004-11-02 20:53:30 -0300 (Tue, 02 Nov 2004) $
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
25 /**
26  * Filters for packets where the "from" field contains a specified value.
27  *
28  * @author Matt Tucker
29  */
30 public class FromContainsFilter implements PacketFilter {
31
32     private String JavaDoc from;
33
34     /**
35      * Creates a "from" contains filter using the "from" field part.
36      *
37      * @param from the from field value the packet must contain.
38      */
39     public FromContainsFilter(String JavaDoc from) {
40         if (from == null) {
41             throw new IllegalArgumentException JavaDoc("Parameter cannot be null.");
42         }
43         this.from = from.toLowerCase();
44     }
45
46     public boolean accept(Packet packet) {
47         if (packet.getFrom() == null) {
48             return false;
49         }
50         else {
51             return packet.getFrom().toLowerCase().indexOf(from) != -1;
52         }
53     }
54 }
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