/*
* 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.sdp.parser;
import gov.nist.javax.sdp.fields.*;
import gov.nist.core.*;
import java.text.*;
import java.util.*;
/**
* Parser for Media field.
*
* @version JAIN-SDP-PUBLIC-RELEASE $Revision: 1.6 $ $Date: 2009-07-17 18:57:16 $
*
* @author Olivier Deruelle
* @author M. Ranganathan <br/>
*
*
*
*/
public class MediaFieldParser extends SDPParser {
/** Creates new MediaFieldParser */
public MediaFieldParser(String mediaField) {
lexer = new Lexer("charLexer", mediaField);
}
public MediaField mediaField() throws ParseException {
if (Debug.parserDebug)
dbg_enter("mediaField");
try {
MediaField mediaField = new MediaField();
lexer.match('m');
lexer.SPorHT();
lexer.match('=');
lexer.SPorHT();
lexer.match(Lexer.ID);
Token media = lexer.getNextToken();
mediaField.setMedia(media.getTokenValue());
this.lexer.SPorHT();
lexer.match(Lexer.ID);
Token port = lexer.getNextToken();
mediaField.setPort(Integer.parseInt(port.getTokenValue()));
this.lexer.SPorHT();
// Some strange media formatting from Sun Ray systems with media
// reported by Emil Ivov and Iain Macdonnell at Sun
if (lexer.hasMoreChars() && lexer.lookAhead(1) == '\n')
return mediaField;
if (lexer.lookAhead(0) == '/') {
// The number of ports is present:
lexer.consume(1);
lexer.match(Lexer.ID);
Token portsNumber = lexer.getNextToken();
mediaField.setNports(
Integer.parseInt(portsNumber.getTokenValue()));
this.lexer.SPorHT();
}
// proto = token *("/" token)
lexer.match(Lexer.ID);
Token token = lexer.getNextToken();
String transport = token.getTokenValue();
while (lexer.lookAhead(0) == '/') {
lexer.consume(1);
lexer.match(Lexer.ID);
Token transportTemp = lexer.getNextToken();
transport = transport + "/" + transportTemp.getTokenValue();
}
mediaField.setProto(transport);
this.lexer.SPorHT();
// The formats list:
Vector formatList = new Vector();
while (lexer.hasMoreChars()) {
char la = lexer.lookAhead(0);
if (la == '\n' || la == '\r')
break;
this.lexer.SPorHT();
//while(lexer.lookAhead(0) == ' ') lexer.consume(1);
lexer.match(Lexer.ID);
Token tok = lexer.getNextToken();
this.lexer.SPorHT();
String format = tok.getTokenValue().trim();
if (!format.equals(""))
formatList.add(format);
}
mediaField.setFormats(formatList);
return mediaField;
} catch (Exception e) {
e.printStackTrace();
//System.out.println(lexer.getPtr());
//System.out.println("char = [" + lexer.lookAhead(0) +"]");
throw new ParseException(lexer.getBuffer(), lexer.getPtr());
} finally {
dbg_leave("mediaField");
}
}
public SDPField parse() throws ParseException {
return this.mediaField();
}
/**
public static void main(String[] args) throws ParseException {
String media[] = {
"m=video 0\r\n",
"m=audio 50006 RTP/AVP 0 8 4 18\r\n",
"m=video 49170/2 RTP/AVP 31\n",
"m=video 49232 RTP/AVP 0\n",
"m=audio 49230 RTP/AVP 96 97 98\n",
"m=application 32416 udp wb\n",
"m=control 49234 H323 mc\n",
"m=audio 50012 RTP/AVP 0 8 4 18\n",
"m=image 49172 udptl t38\n"
};
for (int i = 0; i < media.length; i++) {
MediaFieldParser mediaFieldParser=new MediaFieldParser(
media[i] );
System.out.println("toParse: " + media[i]);
MediaField mediaField=mediaFieldParser.mediaField();
System.out.println("encoded: " +mediaField.encode());
}
}
**/
}
/*
* $Log: not supported by cvs2svn $
* Revision 1.5 2007/02/06 16:40:00 belangery
* Introduced simple code optimizations.
*
* Revision 1.4 2006/07/13 09:02:42 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 1.3 2006/06/19 06:47:26 mranga
* javadoc fixups
*
* Revision 1.2 2006/06/16 15:26:28 mranga
* Added NIST disclaimer to all public domain files. Clean up some javadoc. Fixed a leak
*
* Revision 1.1.1.1 2005/10/04 17:12:34 mranga
*
* Import
*
*
* Revision 1.2 2004/01/22 13:26:28 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.
*
*/