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Java > Open Source Codes > org > apache > james > transport > matchers > SenderHostIs


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2  * Copyright (c) 2000-2004 The Apache Software Foundation. *
3  * All rights reserved. *
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5  * Licensed under the Apache License, Version 2.0 (the "License"); you *
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9  * http://www.apache.org/licenses/LICENSE-2.0 *
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17
18 package org.apache.james.transport.matchers;
19
20 import org.apache.mailet.GenericMatcher;
21 import org.apache.mailet.Mail;
22
23 import java.util.Collection JavaDoc;
24 import java.util.Collections JavaDoc;
25 import java.util.StringTokenizer JavaDoc;
26
27 /**
28  * Checkes the sender's displayed domain name against a supplied list.
29  *
30  * Sample configuration:
31  *
32  * <mailet match="SenderHostIs=domain.com" class="ToProcessor">
33  * <processor> spam </processor>
34  * </mailet>
35  *
36  * @version 1.0.0, 2002-09-10
37  */
38 public class SenderHostIs extends GenericMatcher {
39     /**
40      * The collection of host names to match against.
41      */
42     private Collection JavaDoc senderHosts;
43
44     /**
45      * Initialize the mailet.
46      */
47     public void init() {
48         //Parse the condition...
49 StringTokenizer JavaDoc st = new StringTokenizer JavaDoc(getCondition(), ", ", false);
50
51         //..into a vector of domain names.
52 senderHosts = new java.util.HashSet JavaDoc();
53         while (st.hasMoreTokens()) {
54             senderHosts.add(((String JavaDoc)st.nextToken()).toLowerCase());
55         }
56         senderHosts = Collections.unmodifiableCollection(senderHosts);
57     }
58
59     /**
60      * Takes the message and checks the sender (if there is one) against
61      * the vector of host names.
62      *
63      * Returns the collection of recipients if there's a match.
64      *
65      * @param mail the mail being processed
66      */
67     public Collection JavaDoc match(Mail mail) {
68         try {
69             if (mail.getSender() != null && senderHosts.contains(mail.getSender().getHost().toLowerCase())) {
70                 return mail.getRecipients();
71             }
72         } catch (Exception JavaDoc e) {
73             log(e.getMessage());
74         }
75
76         return null; //No match.
77 }
78 }
79
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