content: /*
  * 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 gov2.nist.javax2.sip.parser;
  
  import gov2.nist.core.*;
  import gov2.nist.javax2.sip.header.*;
  
  import java.text.ParseException;
  
  import javax2.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;
      }
  
  }
  