| /* |
| * Conditions Of Use |
| * |
| * This software was developed by employees of the National Institute of |
| * Standards and Technology (NIST), an agency of the Federal Government. |
| * Pursuant to title 15 Untied States Code Section 105, works of NIST |
| * employees are not subject to copyright protection in the United States |
| * and are considered to be in the public domain. As a result, a formal |
| * license is not needed to use the software. |
| * |
| * This software is provided by NIST as a service and is expressly |
| * provided "AS IS." NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED |
| * OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT |
| * AND DATA ACCURACY. NIST does not warrant or make any representations |
| * regarding the use of the software or the results thereof, including but |
| * not limited to the correctness, accuracy, reliability or usefulness of |
| * the software. |
| * |
| * Permission to use this software is contingent upon your acceptance |
| * of the terms of this agreement |
| * |
| * . |
| * |
| */ |
| package gov.nist.javax.sip.parser; |
| import gov.nist.core.Debug; |
| import gov.nist.core.LexerCore; |
| import gov.nist.core.ParserCore; |
| import gov.nist.core.Token; |
| import java.text.ParseException; |
| |
| /** |
| * Base parser class. |
| * |
| * @version 1.2 $Revision: 1.10 $ $Date: 2009/07/17 18:58:01 $ |
| * |
| * @author M. Ranganathan <br/> |
| * |
| * |
| */ |
| public abstract class Parser extends ParserCore implements TokenTypes { |
| |
| protected ParseException createParseException(String exceptionString) { |
| return new ParseException( |
| lexer.getBuffer() + ":" + exceptionString, |
| lexer.getPtr()); |
| } |
| |
| protected Lexer getLexer() { |
| return (Lexer) this.lexer; |
| } |
| |
| protected String sipVersion() throws ParseException { |
| if (debug) |
| dbg_enter("sipVersion"); |
| try { |
| Token tok = lexer.match(SIP); |
| if (!tok.getTokenValue().equalsIgnoreCase("SIP")) |
| createParseException("Expecting SIP"); |
| lexer.match('/'); |
| tok = lexer.match(ID); |
| if (!tok.getTokenValue().equals("2.0")) |
| createParseException("Expecting SIP/2.0"); |
| |
| return "SIP/2.0"; |
| } finally { |
| if (debug) |
| dbg_leave("sipVersion"); |
| } |
| } |
| |
| /** |
| * parses a method. Consumes if a valid method has been found. |
| */ |
| protected String method() throws ParseException { |
| try { |
| if (debug) |
| dbg_enter("method"); |
| Token[] tokens = this.lexer.peekNextToken(1); |
| Token token = (Token) tokens[0]; |
| if (token.getTokenType() == INVITE |
| || token.getTokenType() == ACK |
| || token.getTokenType() == OPTIONS |
| || token.getTokenType() == BYE |
| || token.getTokenType() == REGISTER |
| || token.getTokenType() == CANCEL |
| || token.getTokenType() == SUBSCRIBE |
| || token.getTokenType() == NOTIFY |
| || token.getTokenType() == PUBLISH |
| || token.getTokenType() == MESSAGE |
| || token.getTokenType() == ID) { |
| lexer.consume(); |
| return token.getTokenValue(); |
| } else { |
| throw createParseException("Invalid Method"); |
| } |
| } finally { |
| if (Debug.debug) |
| dbg_leave("method"); |
| } |
| } |
| |
| /** |
| * Verifies that a given string matches the 'token' production in RFC3261 |
| * |
| * @param token |
| * @throws ParseException - if there are invalid characters |
| * |
| * @author JvB |
| */ |
| public static final void checkToken( String token ) throws ParseException { |
| |
| if (token == null || token.length()==0 ) { |
| throw new ParseException("null or empty token", -1 ); |
| } else { |
| // JvB: check that it is a valid token |
| for ( int i=0; i<token.length(); ++i ) { |
| if ( !LexerCore.isTokenChar( token.charAt(i) )) { |
| throw new ParseException( "Invalid character(s) in string (not allowed in 'token')", i ); |
| } |
| } |
| } |
| } |
| } |
| /* |
| * $Log: Parser.java,v $ |
| * Revision 1.10 2009/07/17 18:58:01 emcho |
| * Converts indentation tabs to spaces so that we have a uniform indentation policy in the whole project. |
| * |
| * Revision 1.9 2008/01/18 11:19:24 jbemmel |
| * added a method to check strings for valid token characters |
| * |
| * Revision 1.8 2007/02/23 14:56:05 belangery |
| * Added performance improvement around header name lowercase conversion. |
| * |
| * Revision 1.7 2006/09/27 15:02:43 mranga |
| * Issue number: |
| * Obtained from: |
| * Submitted by: |
| * Reviewed by: mranga |
| * rfc 2543 transaction matching. fix for MESSAGE request type parsing. |
| * CVS: ---------------------------------------------------------------------- |
| * CVS: Issue number: |
| * CVS: If this change addresses one or more issues, |
| * CVS: then enter the issue number(s) here. |
| * CVS: Obtained from: |
| * CVS: If this change has been taken from another system, |
| * CVS: then name the system in this line, otherwise delete it. |
| * CVS: Submitted by: |
| * CVS: If this code has been contributed to the project by someone else; i.e., |
| * CVS: they sent us a patch or a set of diffs, then include their name/email |
| * CVS: address here. If this is your work then delete this line. |
| * CVS: Reviewed by: |
| * CVS: If we are doing pre-commit code reviews and someone else has |
| * CVS: reviewed your changes, include their name(s) here. |
| * CVS: If you have not had it reviewed then delete this line. |
| * |
| * Revision 1.6 2006/07/13 09:02:18 mranga |
| * Issue number: |
| * Obtained from: |
| * Submitted by: jeroen van bemmel |
| * Reviewed by: mranga |
| * Moved some changes from jain-sip-1.2 to java.net |
| * |
| * CVS: ---------------------------------------------------------------------- |
| * CVS: Issue number: |
| * CVS: If this change addresses one or more issues, |
| * CVS: then enter the issue number(s) here. |
| * CVS: Obtained from: |
| * CVS: If this change has been taken from another system, |
| * CVS: then name the system in this line, otherwise delete it. |
| * CVS: Submitted by: |
| * CVS: If this code has been contributed to the project by someone else; i.e., |
| * CVS: they sent us a patch or a set of diffs, then include their name/email |
| * CVS: address here. If this is your work then delete this line. |
| * CVS: Reviewed by: |
| * CVS: If we are doing pre-commit code reviews and someone else has |
| * CVS: reviewed your changes, include their name(s) here. |
| * CVS: If you have not had it reviewed then delete this line. |
| * |
| * Revision 1.5 2006/06/19 06:47:27 mranga |
| * javadoc fixups |
| * |
| * Revision 1.4 2006/06/16 15:26:28 mranga |
| * Added NIST disclaimer to all public domain files. Clean up some javadoc. Fixed a leak |
| * |
| * Revision 1.3 2005/11/21 23:24:49 jeroen |
| * "SIP" is case insensitive |
| * |
| * Revision 1.2 2005/10/27 20:49:00 jeroen |
| * added support for RFC3903 PUBLISH |
| * |
| * Revision 1.1.1.1 2005/10/04 17:12:35 mranga |
| * |
| * Import |
| * |
| * |
| * Revision 1.3 2004/01/22 13:26:31 sverker |
| * Issue number: |
| * Obtained from: |
| * Submitted by: sverker |
| * Reviewed by: mranga |
| * |
| * Major reformat of code to conform with style guide. Resolved compiler and javadoc warnings. Added CVS tags. |
| * |
| * CVS: ---------------------------------------------------------------------- |
| * CVS: Issue number: |
| * CVS: If this change addresses one or more issues, |
| * CVS: then enter the issue number(s) here. |
| * CVS: Obtained from: |
| * CVS: If this change has been taken from another system, |
| * CVS: then name the system in this line, otherwise delete it. |
| * CVS: Submitted by: |
| * CVS: If this code has been contributed to the project by someone else; i.e., |
| * CVS: they sent us a patch or a set of diffs, then include their name/email |
| * CVS: address here. If this is your work then delete this line. |
| * CVS: Reviewed by: |
| * CVS: If we are doing pre-commit code reviews and someone else has |
| * CVS: reviewed your changes, include their name(s) here. |
| * CVS: If you have not had it reviewed then delete this line. |
| * |
| */ |
