01: /*
02: * Portions Copyright 2000-2007 Sun Microsystems, Inc. All Rights
03: * Reserved. Use is subject to license terms.
04: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
05: *
06: * This program is free software; you can redistribute it and/or
07: * modify it under the terms of the GNU General Public License version
08: * 2 only, as published by the Free Software Foundation.
09: *
10: * This program is distributed in the hope that it will be useful, but
11: * WITHOUT ANY WARRANTY; without even the implied warranty of
12: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13: * General Public License version 2 for more details (a copy is
14: * included at /legal/license.txt).
15: *
16: * You should have received a copy of the GNU General Public License
17: * version 2 along with this work; if not, write to the Free Software
18: * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
19: * 02110-1301 USA
20: *
21: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
22: * Clara, CA 95054 or visit www.sun.com if you need additional
23: * information or have any questions.
24: */
25: package gov.nist.javax.sdp.parser;
26:
27: import gov.nist.javax.sdp.fields.*;
28: import gov.nist.core.*;
29:
30: /**
31: * Parser for Proto Version.
32: *
33: *@version JAIN-SIP-1.1
34: *
35: *
36: *<a href="{@docRoot}/uncopyright.html">This code is in the public domain.</a>
37: *
38: */
39: public class ProtoVersionFieldParser extends SDPParser {
40:
41: /**
42: * Creates new ProtoVersionFieldParser.
43: * @param protoVersionField the protocol version field to be parsed
44: */
45: public ProtoVersionFieldParser(String protoVersionField) {
46: lexer = new Lexer("charLexer", protoVersionField);
47: }
48:
49: /** Default constructor. */
50: protected ProtoVersionFieldParser() {
51: super ();
52: }
53:
54: /**
55: * Perform the protocol version field parsing
56: * @return the parsed protocol version field
57: * @exception ParseException if a parsing error occurs
58: */
59: public ProtoVersionField protoVersionField() throws ParseException {
60: try {
61: lexer.match('v');
62: lexer.SPorHT();
63: lexer.match('=');
64: lexer.SPorHT();
65:
66: ProtoVersionField protoVersionField = new ProtoVersionField();
67: lexer.match(Lexer.ID);
68: Token version = lexer.getNextToken();
69: protoVersionField.setProtoVersion(Integer.parseInt(version
70: .getTokenValue()));
71: lexer.SPorHT();
72:
73: return protoVersionField;
74: } catch (NumberFormatException e) {
75: throw lexer.createParseException();
76: }
77: }
78:
79: /**
80: * Perform the protocol version field parsing
81: * @return the parsed protocol version field
82: * @exception ParseException if a parsing error occurs
83: */
84: public SDPField parse() throws ParseException {
85: return protoVersionField();
86: }
87:
88: }
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