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1   /*****************************************************************
2    * Licensed to the Apache Software Foundation (ASF) under one   *
3    * or more contributor license agreements.  See the NOTICE file *
4    * distributed with this work for additional information        *
5    * regarding copyright ownership.  The ASF licenses this file   *
6    * to you under the Apache License, Version 2.0 (the            *
7    * "License"); you may not use this file except in compliance   *
8    * with the License.  You may obtain a copy of the License at   *
9    *                                                              *
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11   *                                                              *
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14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
15   * KIND, either express or implied.  See the License for the    *
16   * specific language governing permissions and limitations      *
17   * under the License.                                           *
18   ****************************************************************/
19  
20  package org.apache.james.transport.matchers;
21  
22  import org.apache.mailet.RFC2822Headers;
23  import org.apache.mailet.GenericMatcher;
24  import org.apache.mailet.Mail;
25  
26  import javax.mail.Header;
27  import javax.mail.internet.MimeMessage;
28  import java.util.Collection;
29  import java.util.Enumeration;
30  
31  /***
32   *
33   * @version 1.0.0, 1/5/2000
34   */
35  
36  public class RelayLimit extends GenericMatcher {
37      int limit = 30;
38  
39      public void init() {
40          limit = Integer.parseInt(getCondition());
41      }
42  
43      public Collection match(Mail mail) throws javax.mail.MessagingException {
44          MimeMessage mm = mail.getMessage();
45          int count = 0;
46          for (Enumeration e = mm.getAllHeaders(); e.hasMoreElements();) {
47              Header hdr = (Header)e.nextElement();
48              if (hdr.getName().equals(RFC2822Headers.RECEIVED)) {
49                  count++;
50              }
51          }
52          if (count >= limit) {
53              return mail.getRecipients();
54          } else {
55              return null;
56          }
57      }
58  }