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Java > Open Source Codes > com > Yasna > forum > tags > PrintMessageBodyTag


1 /**
2  * Copyright (C) 2001 Yasna.com. All rights reserved.
3  *
4  * ===================================================================
5  * The Apache Software License, Version 1.1
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  *
11  * 1. Redistributions of source code must retain the above copyright
12  * notice, this list of conditions and the following disclaimer.
13  *
14  * 2. Redistributions in binary form must reproduce the above copyright
15  * notice, this list of conditions and the following disclaimer in
16  * the documentation and/or other materials provided with the
17  * distribution.
18  *
19  * 3. The end-user documentation included with the redistribution,
20  * if any, must include the following acknowledgment:
21  * "This product includes software developed by
22  * Yasna.com (http://www.yasna.com)."
23  * Alternately, this acknowledgment may appear in the software itself,
24  * if and wherever such third-party acknowledgments normally appear.
25  *
26  * 4. The names "Yazd" and "Yasna.com" must not be used to
27  * endorse or promote products derived from this software without
28  * prior written permission. For written permission, please
29  * contact yazd@yasna.com.
30  *
31  * 5. Products derived from this software may not be called "Yazd",
32  * nor may "Yazd" appear in their name, without prior written
33  * permission of Yasna.com.
34  *
35  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38  * DISCLAIMED. IN NO EVENT SHALL YASNA.COM OR
39  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
42  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
43  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
45  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46  * SUCH DAMAGE.
47  * ====================================================================
48  *
49  * This software consists of voluntary contributions made by many
50  * individuals on behalf of Yasna.com. For more information
51  * on Yasna.com, please see <http://www.yasna.com>.
52  */
53
54 package com.Yasna.forum.tags;
55
56 import javax.servlet.jsp.tagext.*;
57 import com.Yasna.forum.*;
58 import javax.servlet.jsp.*;
59 import java.io.*;
60
61 /**
62  * Jsp tag must be nested in message tag. Prints the body content if
63  * user is authorized to read the content or error message otherwise.
64  */
65 public class PrintMessageBodyTag extends TagSupport {
66
67     private String JavaDoc resultId = null;
68
69     public int doStartTag() throws JspException {
70         try {
71             MessageTag mt = getMessageTag();
72             String JavaDoc body = mt.getBody();
73             if (body == null) {
74                 body = "[You are not authorized to read this message!]";
75             }
76             pageContext.getOut().print(body);
77         } catch(Exception JavaDoc e) {
78         }
79         return SKIP_BODY;
80     }
81
82     /**
83      * Retrieve Authorization object from pageContext which give the information
84      * for currently logged user.
85      *
86      * @return Authorization object.
87      */
88     private Authorization getAuthToken() {
89         YazdState js = (YazdState) pageContext.getAttribute("yazdUserState",PageContext.SESSION_SCOPE);
90         return js.getAuthorization();
91     }
92
93     /**
94      * Gets MessageTag object which represents the parent Message tag.
95      * @return MessageTag object
96      */
97     private MessageTag getMessageTag() {
98         MessageTag mt = null;
99         try {
100             mt = (MessageTag)this.findAncestorWithClass(this,
101                 Class.forName("com.Yasna.forum.tags.MessageTag"));
102         } catch(Exception JavaDoc e) {
103         }
104         return mt;
105     }
106
107     public void setId(String JavaDoc id) {
108         resultId = id;
109     }
110 }
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