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 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
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 javax.mail;
21
22 /**
23 * The context in which a piece of message content is contained.
24 *
25 * @version $Rev: 578802 $ $Date: 2007-09-24 09:16:44 -0400 (Mon, 24 Sep 2007) $
26 */
27 public class MessageContext {
28 private final Part part;
29
30 /**
31 * Create a MessageContext object describing the context of the supplied Part.
32 *
33 * @param part the containing part
34 */
35 public MessageContext(Part part) {
36 this.part = part;
37 }
38
39 /**
40 * Return the {@link Part} that contains the content.
41 *
42 * @return the part
43 */
44 public Part getPart() {
45 return part;
46 }
47
48 /**
49 * Return the message that contains the content; if the Part is a {@link Multipart}
50 * then recurse up the chain until a {@link Message} is found.
51 *
52 * @return
53 */
54 public Message getMessage() {
55 return getMessageFrom(part);
56 }
57
58 /**
59 * Return the session associated with the Message containing this Part.
60 *
61 * @return the session associated with this context's root message
62 */
63 public Session getSession() {
64 Message message = getMessage();
65 if (message == null) {
66 return null;
67 } else {
68 return message.session;
69 }
70 }
71
72 /**
73 * recurse up the chain of MultiPart/BodyPart parts until we hit a message
74 *
75 * @param p The starting part.
76 *
77 * @return The encountered Message or null if no Message parts
78 * are found.
79 */
80 private Message getMessageFrom(Part p) {
81 while (p != null) {
82 if (p instanceof Message) {
83 return (Message) p;
84 }
85 Multipart mp = ((BodyPart) p).getParent();
86 if (mp == null) {
87 return null;
88 }
89 p = mp.getParent();
90 }
91 return null;
92 }
93 }