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 a list of route headers.
32: *
33: * @version JAIN-SIP-1.1
34: *
35: * <a href="{@docRoot}/uncopyright.html">This code is in the public domain.</a>
36: *
37: * @version 1.0
38: */
39:
40: public class RouteParser extends AddressParametersParser {
41: /** Default constructor. */
42: RouteParser() {
43: }
44:
45: /**
46: * Constructor with initial routeheader field.
47: * @param route message to parse to set
48: */
49: public RouteParser(String route) {
50: super (route);
51: }
52:
53: /**
54: * Constructor with initial lexer engine.
55: * @param lexer initial lexer engine
56: */
57: protected RouteParser(Lexer lexer) {
58: super (lexer);
59: }
60:
61: /**
62: * Parses the String message and generate the Route List Object.
63: * @return Header the Route List object
64: * @throws ParseException if errors occur during the parsing
65: */
66: public Header parse() throws ParseException {
67: RouteList routeList = new RouteList();
68: if (debug)
69: dbg_enter("parse");
70:
71: try {
72: this .lexer.match(TokenTypes.ROUTE);
73: this .lexer.SPorHT();
74: this .lexer.match(':');
75: this .lexer.SPorHT();
76: while (true) {
77: RouteHeader route = new RouteHeader();
78: super .parse(route);
79: routeList.add(route);
80: this .lexer.SPorHT();
81: if (lexer.lookAhead(0) == ',') {
82: this .lexer.match(',');
83: this .lexer.SPorHT();
84: } else if (lexer.lookAhead(0) == '\n')
85: break;
86: else
87: throw createParseException("unexpected char");
88: }
89: return routeList;
90: } finally {
91: if (debug)
92: dbg_leave("parse");
93: }
94: }
95: }
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