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.siplite.parser;
26:
27: import gov.nist.siplite.header.*;
28: import gov.nist.core.*;
29:
30: /**
31: * Parser for CSeq headers.
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 CSeqParser extends HeaderParser {
40: /** Default constructor. */
41: CSeqParser() {
42: }
43:
44: /**
45: * Constructore with initial c-sequence header.
46: * @param cseq initial header value
47: */
48: public CSeqParser(String cseq) {
49: super (cseq);
50: }
51:
52: /**
53: * Constructor with initial lexer engine.
54: * @param lexer initial charcater parsing engine
55: */
56:
57: protected CSeqParser(Lexer lexer) {
58: super (lexer);
59: }
60:
61: /**
62: * Invokes the parsing engine.
63: * @return the parsed header
64: */
65: public Header parse() throws ParseException {
66: try {
67: CSeqHeader c = new CSeqHeader();
68:
69: this .lexer.match(TokenTypes.CSEQ);
70: this .lexer.SPorHT();
71: this .lexer.match(':');
72: this .lexer.SPorHT();
73: String number = this .lexer.number();
74: c.setSequenceNumber(Integer.parseInt(number));
75: this .lexer.SPorHT();
76: String m = method();
77: c.setMethod(m);
78: this .lexer.SPorHT();
79: this .lexer.match('\n');
80: return c;
81: } catch (NumberFormatException ex) {
82:
83: throw createParseException("Number format exception");
84: }
85: }
86: }
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