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.javax2.sip.header.*;
  
  import java.util.*;
  import java.text.ParseException;
  
  /**
   * Parser for SIP Date field. Converts from SIP Date to the
   * internal storage (Calendar)
   *
   * @version 1.2 $Revision: 1.11 $ $Date: 2009/07/17 18:57:59 $
   */
  public class DateParser extends HeaderParser {
  
      /**
       * Constructor
       * @param date message to parse to set
       */
      public DateParser(String date) {
          super(date);
      }
  
      protected DateParser(Lexer lexer) {
          super(lexer);
      }
  
      /**
       * Parse method.
       * @throws ParseException
       * @return  the parsed Date header/
       */
      public SIPHeader parse() throws ParseException {
          if (debug)
              dbg_enter("DateParser.parse");
          try {
              headerName(TokenTypes.DATE);
              wkday();
              lexer.match(',');
              lexer.match(' ');
              Calendar cal = date();
              lexer.match(' ');
              time(cal);
              lexer.match(' ');
              String tzone = this.lexer.ttoken().toLowerCase();
              if (!"gmt".equals(tzone))
                  throw createParseException("Bad Time Zone " + tzone);
              this.lexer.match('\n');
              SIPDateHeader retval = new SIPDateHeader();
              retval.setDate(cal);
              return retval;
          } finally {
              if (debug)
                  dbg_leave("DateParser.parse");
  
          }
  
      }
  
  
  }
  