gov.nist.javax.sip.parser.RetryAfterParser Maven / Gradle / Ivy
/*
* 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.javax.sip.header.*;
import gov.nist.core.*;
import java.text.ParseException;
import javax.sip.*;
/**
* Parser for RetryAfter header.
*
* @version 1.2
*
* @author Olivier Deruelle
* @author M. Ranganathan
*
*
* @version 1.2 $Revision: 1.10 $ $Date: 2009-11-04 17:23:00 $
*/
public class RetryAfterParser extends HeaderParser {
/**
* Creates a new instance of RetryAfterParser
* @param retryAfter the header to parse
*/
public RetryAfterParser(String retryAfter) {
super(retryAfter);
}
/**
* Constructor
* @param lexer the lexer to use to parse the header
*/
protected RetryAfterParser(Lexer lexer) {
super(lexer);
}
/**
* parse the String message
* @return SIPHeader (RetryAfter object)
* @throws SIPParseException if the message does not respect the spec.
*/
public SIPHeader parse() throws ParseException {
if (debug)
dbg_enter("RetryAfterParser.parse");
RetryAfter retryAfter = new RetryAfter();
try {
headerName(TokenTypes.RETRY_AFTER);
// mandatory delatseconds:
String value = lexer.number();
try {
int ds = Integer.parseInt(value);
retryAfter.setRetryAfter(ds);
} catch (NumberFormatException ex) {
throw createParseException(ex.getMessage());
} catch (InvalidArgumentException ex) {
throw createParseException(ex.getMessage());
}
this.lexer.SPorHT();
if (lexer.lookAhead(0) == '(') {
String comment = this.lexer.comment();
retryAfter.setComment(comment);
}
this.lexer.SPorHT();
while (lexer.lookAhead(0) == ';') {
this.lexer.match(';');
this.lexer.SPorHT();
lexer.match(TokenTypes.ID);
Token token = lexer.getNextToken();
value = token.getTokenValue();
if (value.equalsIgnoreCase("duration")) {
this.lexer.match('=');
this.lexer.SPorHT();
value = lexer.number();
try {
int duration = Integer.parseInt(value);
retryAfter.setDuration(duration);
} catch (NumberFormatException ex) {
throw createParseException(ex.getMessage());
} catch (InvalidArgumentException ex) {
throw createParseException(ex.getMessage());
}
} else {
this.lexer.SPorHT();
this.lexer.match('=');
this.lexer.SPorHT();
lexer.match(TokenTypes.ID);
Token secondToken = lexer.getNextToken();
String secondValue = secondToken.getTokenValue();
retryAfter.setParameter(value, secondValue);
}
this.lexer.SPorHT();
}
} finally {
if (debug)
dbg_leave("RetryAfterParser.parse");
}
return retryAfter;
}
}