AttachmentUtils


1   /*
2    * Copyright 2001-2004 The Apache Software Foundation.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.jboss.axis.attachments;
17  
18  import org.jboss.axis.AxisFault;
19  import org.jboss.axis.Part;
20  import org.jboss.axis.utils.Messages;
21  
22  import javax.activation.DataHandler  ;
23  
24  /**
25   * This class allow access to the Jaf data handler in AttachmentPart.
26   *
27   * @author Rick Rineholt
28   */
29  public class AttachmentUtils
30  {
31  
32     private AttachmentUtils()
33     {
34     }
35     // no one should create.
36  
37     /**
38      * Obtain the DataHandler from the part.
39      *
40      * @param part the part containing the Java Activiation Framework data source.
41      * @return The Java activation data handler.
42      * @throws AxisFault
43      */
44     public static DataHandler   getActivationDataHandler(Part part)
45             throws AxisFault
46     {
47  
48        if (null == part)
49        {
50           throw new AxisFault(Messages.getMessage("gotNullPart"));
51        }
52  
53        if (!(part instanceof AttachmentPartImpl))
54        {
55           throw new AxisFault(Messages.getMessage("unsupportedAttach", part.getClass().getName(),
56                   AttachmentPartImpl.class.getName()));
57        }
58  
59        return ((AttachmentPartImpl)part).getActivationDataHandler();
60     }
61  
62     /**
63      * Determine if an object is to be treated as an attchment.
64      *
65      * @param value the value that is to be determined if
66      *              its an attachment.
67      * @return True if value should be treated as an attchment.
68      */
69     public static boolean isAttachment(Object   value)
70     {
71  
72        if (null == value)
73        {
74           return false;
75        }
76  
77        return value instanceof javax.activation.DataHandler  ;
78     }
79  }
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