1/*
2* Conditions Of Use
3*
4* This software was developed by employees of the National Institute of
5* Standards and Technology (NIST), an agency of the Federal Government.
6* Pursuant to title 15 Untied States Code Section 105, works of NIST
7* employees are not subject to copyright protection in the United States
8* and are considered to be in the public domain.  As a result, a formal
9* license is not needed to use the software.
10*
11* This software is provided by NIST as a service and is expressly
12* provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
13* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
14* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
15* AND DATA ACCURACY.  NIST does not warrant or make any representations
16* regarding the use of the software or the results thereof, including but
17* not limited to the correctness, accuracy, reliability or usefulness of
18* the software.
19*
20* Permission to use this software is contingent upon your acceptance
21* of the terms of this agreement
22*
23* .
24*
25*/
26/*******************************************************************************
27
28* Product of NIST/ITL Advanced Networking Technologies Division (ANTD).        *
29
30*******************************************************************************/
31
32package gov.nist.javax.sip.header;
33
34import java.text.ParseException;
35import javax.sip.header.*;
36
37/**
38 * Supported SIP Header.
39 *
40 * @version 1.2 $Revision: 1.5 $ $Date: 2009/07/17 18:57:39 $
41 *
42 * @author M. Ranganathan   <br/>
43 * @author Olivier Deruelle <br/>
44 *
45 *
46 *
47 */
48public class Subject extends SIPHeader implements SubjectHeader {
49
50    /**
51     * Comment for <code>serialVersionUID</code>
52     */
53    private static final long serialVersionUID = -6479220126758862528L;
54    /** subject field
55     */
56    protected String subject;
57
58    /** Default Constructor.
59     */
60    public Subject() {
61        super(SUBJECT);
62    }
63
64    /**
65     * Generate the canonical form.
66     * @return String.
67     */
68    public String encodeBody() {
69        if (subject != null) {
70            return subject;
71        } else {
72            return "";
73        }
74    }
75
76    /**
77     * Sets the subject value of the SubjectHeader to the supplied string
78     * subject value.
79     *
80     * @param subject - the new subject value of this header
81     * @throws ParseException which signals that an error has been reached
82     * unexpectedly while parsing the subject value.
83     */
84    public void setSubject(String subject) throws ParseException {
85        if (subject == null)
86            throw new NullPointerException(
87                "JAIN-SIP Exception, "
88                    + " Subject, setSubject(), the subject parameter is null");
89        this.subject = subject;
90    }
91
92    /**
93     * Gets the subject value of SubjectHeader
94     *
95     * @return subject of SubjectHeader
96     */
97    public String getSubject() {
98        return subject;
99    }
100
101}
102/*
103 * $Log: Subject.java,v $
104 * Revision 1.5  2009/07/17 18:57:39  emcho
105 * Converts indentation tabs to spaces so that we have a uniform indentation policy in the whole project.
106 *
107 * Revision 1.4  2006/07/13 09:01:21  mranga
108 * Issue number:
109 * Obtained from:
110 * Submitted by:  jeroen van bemmel
111 * Reviewed by:   mranga
112 * Moved some changes from jain-sip-1.2 to java.net
113 *
114 * CVS: ----------------------------------------------------------------------
115 * CVS: Issue number:
116 * CVS:   If this change addresses one or more issues,
117 * CVS:   then enter the issue number(s) here.
118 * CVS: Obtained from:
119 * CVS:   If this change has been taken from another system,
120 * CVS:   then name the system in this line, otherwise delete it.
121 * CVS: Submitted by:
122 * CVS:   If this code has been contributed to the project by someone else; i.e.,
123 * CVS:   they sent us a patch or a set of diffs, then include their name/email
124 * CVS:   address here. If this is your work then delete this line.
125 * CVS: Reviewed by:
126 * CVS:   If we are doing pre-commit code reviews and someone else has
127 * CVS:   reviewed your changes, include their name(s) here.
128 * CVS:   If you have not had it reviewed then delete this line.
129 *
130 * Revision 1.3  2006/06/19 06:47:27  mranga
131 * javadoc fixups
132 *
133 * Revision 1.2  2006/06/16 15:26:28  mranga
134 * Added NIST disclaimer to all public domain files. Clean up some javadoc. Fixed a leak
135 *
136 * Revision 1.1.1.1  2005/10/04 17:12:35  mranga
137 *
138 * Import
139 *
140 *
141 * Revision 1.2  2004/01/22 13:26:29  sverker
142 * Issue number:
143 * Obtained from:
144 * Submitted by:  sverker
145 * Reviewed by:   mranga
146 *
147 * Major reformat of code to conform with style guide. Resolved compiler and javadoc warnings. Added CVS tags.
148 *
149 * CVS: ----------------------------------------------------------------------
150 * CVS: Issue number:
151 * CVS:   If this change addresses one or more issues,
152 * CVS:   then enter the issue number(s) here.
153 * CVS: Obtained from:
154 * CVS:   If this change has been taken from another system,
155 * CVS:   then name the system in this line, otherwise delete it.
156 * CVS: Submitted by:
157 * CVS:   If this code has been contributed to the project by someone else; i.e.,
158 * CVS:   they sent us a patch or a set of diffs, then include their name/email
159 * CVS:   address here. If this is your work then delete this line.
160 * CVS: Reviewed by:
161 * CVS:   If we are doing pre-commit code reviews and someone else has
162 * CVS:   reviewed your changes, include their name(s) here.
163 * CVS:   If you have not had it reviewed then delete this line.
164 *
165 */
166