/*
* 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 java.util.*;
import gov.nist.core.*;
import gov.nist.javax.sdp.fields.*;
import gov.nist.javax.sdp.*;
import java.text.ParseException;
// Acknowledgement: this includes a bug fix submitted by
// Rafael Barriuso rbarriuso@dit.upm.es
/** Parser for SDP Announce messages.
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
public class SDPAnnounceParser extends ParserCore {
protected Lexer lexer;
protected Vector sdpMessage;
/** Creates new SDPAnnounceParser
* @param sdpMessage Vector of messages to parse.
*/
public SDPAnnounceParser(Vector sdpMessage) {
this.sdpMessage = sdpMessage;
}
/** Create a new SDPAnnounceParser.
*@param message string containing the sdp announce message.
*
*/
public SDPAnnounceParser(String message) {
int start = 0;
String line = null;
// Return trivially if there is no sdp announce message
// to be parsed. Bruno Konik noticed this bug.
if (message == null) return;
sdpMessage = new Vector();
// Strip off leading and trailing junk.
String sdpAnnounce = message.trim() + "\r\n";
// Bug fix by Andreas Bystrom.
while (start < sdpAnnounce.length()) {
// Major re-write by Ricardo Borba.
int lfPos = sdpAnnounce.indexOf("\n", start);
int crPos = sdpAnnounce.indexOf("\r", start);
if (lfPos >= 0 && crPos < 0) {
// there are only "\n" separators
line = sdpAnnounce.substring(start, lfPos);
start = lfPos + 1;
} else if (lfPos < 0 && crPos >= 0) {
//bug fix: there are only "\r" separators
line = sdpAnnounce.substring(start, crPos);
start = crPos + 1;
} else if (lfPos >= 0 && crPos >= 0) {
// there are "\r\n" or "\n\r" (if exists) separators
if (lfPos > crPos) {
// assume "\r\n" for now
line = sdpAnnounce.substring(start, crPos);
// Check if the "\r" and "\n" are close together
if (lfPos == crPos + 1) {
start = lfPos + 1; // "\r\n"
} else {
start = crPos + 1; // "\r" followed by the next record and a "\n" further away
}
} else {
// assume "\n\r" for now
line = sdpAnnounce.substring(start, lfPos);
// Check if the "\n" and "\r" are close together
if (crPos == lfPos + 1) {
start = crPos + 1; // "\n\r"
} else {
start = lfPos + 1; // "\n" followed by the next record and a "\r" further away
}
}
} else if (lfPos < 0 && crPos < 0) { // end
break;
}
sdpMessage.addElement(line);
}
}
public SessionDescriptionImpl parse() throws ParseException {
SessionDescriptionImpl retval = new SessionDescriptionImpl();
for (int i = 0; i < sdpMessage.size(); i++) {
String field = (String) sdpMessage.elementAt(i);
SDPParser sdpParser = ParserFactory.createParser(field);
SDPField sdpField = null;
if (sdpParser != null)
{
sdpField = sdpParser.parse();
}
retval.addField(sdpField);
}
return retval;
}
}
/*
* $Log: not supported by cvs2svn $
* Revision 1.10 2009/07/17 18:57:17 emcho
* Converts indentation tabs to spaces so that we have a uniform indentation policy in the whole project.
*
* Revision 1.9 2008/01/18 02:18:24 mranga
* Issue number:
* Obtained from:
* Submitted by:
* Reviewed by: mranga
* Moved out some test code.
*
* Revision 1.8 2006/11/22 04:08:57 rborba
* Fixed a null pointer exception when an SDP is received with an empty session name ("s=").
*
* Revision 1.7 2006/07/13 09:02:37 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 1.5 2005/01/21 21:19:24 mranga
* Reviewed by: mranga
* Strip leading whitespace while parsing Sdp Announce messages.
*
* Revision 1.4 2004/02/18 14:33:02 mranga
* Submitted by: Bruno Konik
* Reviewed by: mranga
* Remove extraneous newline in encoding messages. Test for empty sdp announce
* rather than die with null when null is passed to sdp announce parser.
* Fixed bug in checking for \n\n when looking for message end.
*
* Revision 1.3 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.
*
*/