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
  *
  * .
  *
  */
  /*
   * AcceptLanguageParser.java
   *
   * Created on June 10, 2002, 3:31 PM
   */
  
  package gov2.nist.javax2.sip.parser;
  import gov2.nist.core.*;
  import gov2.nist.javax2.sip.header.*;
  
  import javax2.sip.*;
  
  import java.text.ParseException;
  
  
  /**
   * Parser for Accept Language Headers.
   *
   * Accept Language body.
   * <pre>
   *
   * Accept-Language = "Accept-Language" ":"
   *                         1#( language-range [ ";" "q" "=" qvalue ] )
   *       language-range  = ( ( 1*8ALPHA *( "-" 1*8ALPHA ) ) | "*" )
   *
   * HTTP RFC 2616 Section 14.4
   * </pre>
   *
   *  Accept-Language: da, en-gb;q=0.8, en;q=0.7
   *
   * @see AcceptLanguageList
   * @version 1.2 $Revision: 1.8 $ $Date: 2009/07/17 18:57:56 $
   *
   * @author Olivier Deruelle
   *
   */
  public class AcceptLanguageParser extends HeaderParser {
  
      /**
       * Constructor
       * @param acceptLanguage AcceptLanguage message to parse
       */
      public AcceptLanguageParser(String acceptLanguage) {
          super(acceptLanguage);
      }
  
      /**
       * Constructor
       * @param lexer Lexer to set
       */
      protected AcceptLanguageParser(Lexer lexer) {
          super(lexer);
      }
  
      /**
       * parse the String message
       * @return SIPHeader (AcceptLanguage object)
       * @throws ParseException if the message does not respect the spec.
       */
      public SIPHeader parse() throws ParseException {
          AcceptLanguageList acceptLanguageList = new AcceptLanguageList();
          if (debug)
              dbg_enter("AcceptLanguageParser.parse");
  
          try {
              headerName(TokenTypes.ACCEPT_LANGUAGE);
  
              while (lexer.lookAhead(0) != '\n') {
                  AcceptLanguage acceptLanguage = new AcceptLanguage();
                  acceptLanguage.setHeaderName(SIPHeaderNames.ACCEPT_LANGUAGE);
                  if (lexer.lookAhead(0) != ';') {
                      // Content-Coding:
                      lexer.match(TokenTypes.ID);
                      Token value = lexer.getNextToken();
                      acceptLanguage.setLanguageRange(value.getTokenValue());
                  }
  
                  while (lexer.lookAhead(0) == ';') {
                      this.lexer.match(';');
                      this.lexer.SPorHT();
                      this.lexer.match('q');
                      this.lexer.SPorHT();
                      this.lexer.match('=');
                      this.lexer.SPorHT();
                      lexer.match(TokenTypes.ID);
                      Token value = lexer.getNextToken();
                      try {
                          float fl = Float.parseFloat(value.getTokenValue());
                          acceptLanguage.setQValue(fl);
                      } catch (NumberFormatException ex) {
                          throw createParseException(ex.getMessage());
                      } catch (InvalidArgumentException ex) {
                          throw createParseException(ex.getMessage());
                      }
                      this.lexer.SPorHT();
                  }
  
                  acceptLanguageList.add(acceptLanguage);
                  if (lexer.lookAhead(0) == ',') {
                      this.lexer.match(',');
                      this.lexer.SPorHT();
                  } else
                      this.lexer.SPorHT();
  
              }
          } finally {
              if (debug)
                  dbg_leave("AcceptLanguageParser.parse");
          }
  
          return acceptLanguageList;
      }
  }
  /*
   * $Log: AcceptLanguageParser.java,v $
   * Revision 1.8  2009/07/17 18:57:56  emcho
   * Converts indentation tabs to spaces so that we have a uniform indentation policy in the whole project.
   *
   * Revision 1.7  2006/07/13 09:02:11  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 06:47:27  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 17:12:35  mranga
   *
   * Import
   *
   *
   * Revision 1.5  2004/07/28 14:13:54  mranga
   * Submitted by:  mranga
   *
   * Move out the test code to a separate test/unit class.
   * Fixed some encode methods.
   *
   * Revision 1.4  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.
   *
   */
  