View Javadoc

1   /************************************************************************
2    * Copyright (c) 2000-2006 The Apache Software Foundation.             *
3    * All rights reserved.                                                *
4    * ------------------------------------------------------------------- *
5    * Licensed under the Apache License, Version 2.0 (the "License"); you *
6    * may not use this file except in compliance with the License. You    *
7    * may obtain a copy of the License at:                                *
8    *                                                                     *
9    *     http://www.apache.org/licenses/LICENSE-2.0                      *
10   *                                                                     *
11   * Unless required by applicable law or agreed to in writing, software *
12   * distributed under the License is distributed on an "AS IS" BASIS,   *
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or     *
14   * implied.  See the License for the specific language governing       *
15   * permissions and limitations under the License.                      *
16   ***********************************************************************/
17  
18  package org.apache.james.transport.matchers;
19  
20  import org.apache.mailet.GenericMatcher;
21  import org.apache.mailet.Mail;
22  
23  import javax.mail.MessagingException;
24  import javax.mail.Multipart;
25  import javax.mail.Part;
26  import javax.mail.internet.MimeMessage;
27  import java.util.Collection;
28  
29  /***
30   * Checks whether this message has an attachment
31   *
32   * @version CVS $Revision: 365582 $ $Date: 2006-01-03 08:51:21 +0000 (mar, 03 gen 2006) $
33   */
34  public class HasAttachment extends GenericMatcher {
35  
36      /*** 
37       * Either every recipient is matching or neither of them.
38       * @throws MessagingException if no attachment is found and at least one exception was thrown
39       */
40      public Collection match(Mail mail) throws MessagingException {
41          
42          Exception anException = null;
43          
44          try {
45              MimeMessage message = mail.getMessage();
46              Object content;
47              
48              /***
49               * if there is an attachment and no inline text,
50               * the content type can be anything
51               */
52              if (message.getContentType() == null) {
53                  return null;
54              }
55              
56              content = message.getContent();
57              if (content instanceof Multipart) {
58                  Multipart multipart = (Multipart) content;
59                  for (int i = 0; i < multipart.getCount(); i++) {
60                      try {
61                          Part part = multipart.getBodyPart(i);
62                          String fileName = part.getFileName();
63                          if (fileName != null) {
64                              return mail.getRecipients(); // file found
65                          }
66                      } catch (MessagingException e) {
67                          anException = e;
68                      } // ignore any messaging exception and process next bodypart
69                  }
70              } else {
71                  String fileName = message.getFileName();
72                  if (fileName != null) {
73                      return mail.getRecipients(); // file found
74                  }
75              }
76          } catch (Exception e) {
77              anException = e;
78          }
79          
80          // if no attachment was found and at least one exception was catched rethrow it up
81          if (anException != null) {
82              throw new MessagingException("Malformed message", anException);
83          }
84          
85          return null; // no attachment found
86      }
87  }