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 SIP Expires Parser. Converts from SIP Date to the
32: * internal storage (Calendar).
33: *
34: * @version JAIN-SIP-1.1
35: *
36: *
37: * <a href="{@docRoot}/uncopyright.html">This code is in the public domain.</a>
38: *
39: */
40: public class ExpiresParser extends HeaderParser {
41: /** Default constructor. */
42: public ExpiresParser() {
43: }
44:
45: /**
46: * Constructor with initial expires header to be processed.
47: * @param text is the text of the header to parse
48: */
49: public ExpiresParser(String text) {
50: super (text);
51: }
52:
53: /**
54: * Constructor with initial lexer engine.
55: * @param lexer initial lexer engine
56: */
57: protected ExpiresParser(Lexer lexer) {
58: super (lexer);
59: }
60:
61: /**
62: * Parses the header.
63: * @return parsed Expires header
64: * @exception ParseException if a parsing error occurs
65: */
66: public Header parse() throws ParseException {
67: ExpiresHeader expires = new ExpiresHeader();
68: if (debug)
69: dbg_enter("parse");
70: try {
71: lexer.match(TokenTypes.EXPIRES);
72: lexer.SPorHT();
73: lexer.match(':');
74: lexer.SPorHT();
75: String nextId = lexer.getNextId();
76: lexer.match('\n');
77: try {
78: int delta = Integer.parseInt(nextId);
79: expires.setExpires(delta);
80: return expires;
81: } catch (NumberFormatException ex) {
82: throw createParseException("bad integer format");
83: }
84: } finally {
85: if (debug)
86: dbg_leave("parse");
87: }
88:
89: }
90: }
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