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      1 /*
      2 * Conditions Of Use
      3 *
      4 * This software was developed by employees of the National Institute of
      5 * Standards and Technology (NIST), an agency of the Federal Government.
      6 * Pursuant to title 15 Untied States Code Section 105, works of NIST
      7 * employees are not subject to copyright protection in the United States
      8 * and are considered to be in the public domain.  As a result, a formal
      9 * license is not needed to use the software.
     10 *
     11 * This software is provided by NIST as a service and is expressly
     12 * provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
     13 * OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
     14 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
     15 * AND DATA ACCURACY.  NIST does not warrant or make any representations
     16 * regarding the use of the software or the results thereof, including but
     17 * not limited to the correctness, accuracy, reliability or usefulness of
     18 * the software.
     19 *
     20 * Permission to use this software is contingent upon your acceptance
     21 * of the terms of this agreement
     22 *
     23 * .
     24 *
     25 */
     26 package gov.nist.javax.sip.parser;
     27 import gov.nist.javax.sip.header.*;
     28 import java.util.*;
     29 import java.text.ParseException;
     30 
     31 /**
     32  * Parser for SIP Date field. Converts from SIP Date to the
     33  * internal storage (Calendar)
     34  *
     35  * @version 1.2 $Revision: 1.11 $ $Date: 2009/07/17 18:57:59 $
     36  */
     37 public class DateParser extends HeaderParser {
     38 
     39     /**
     40      * Constructor
     41      * @param date message to parse to set
     42      */
     43     public DateParser(String date) {
     44         super(date);
     45     }
     46 
     47     protected DateParser(Lexer lexer) {
     48         super(lexer);
     49     }
     50 
     51     /**
     52      * Parse method.
     53      * @throws ParseException
     54      * @return  the parsed Date header/
     55      */
     56     public SIPHeader parse() throws ParseException {
     57         if (debug)
     58             dbg_enter("DateParser.parse");
     59         try {
     60             headerName(TokenTypes.DATE);
     61             wkday();
     62             lexer.match(',');
     63             lexer.match(' ');
     64             Calendar cal = date();
     65             lexer.match(' ');
     66             time(cal);
     67             lexer.match(' ');
     68             String tzone = this.lexer.ttoken().toLowerCase();
     69             if (!"gmt".equals(tzone))
     70                 throw createParseException("Bad Time Zone " + tzone);
     71             this.lexer.match('\n');
     72             SIPDateHeader retval = new SIPDateHeader();
     73             retval.setDate(cal);
     74             return retval;
     75         } finally {
     76             if (debug)
     77                 dbg_leave("DateParser.parse");
     78 
     79         }
     80 
     81     }
     82 
     83 
     84 }
     85