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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 
     28 import gov.nist.javax.sip.header.RecordRoute;
     29 import gov.nist.javax.sip.header.RecordRouteList;
     30 import gov.nist.javax.sip.header.SIPHeader;
     31 
     32 import java.text.ParseException;
     33 
     34 /**
     35  * Parser for a list of route headers.
     36  *
     37  * @version 1.2 $Revision: 1.9 $ $Date: 2009/07/17 18:58:03 $
     38  *
     39  * @author Olivier Deruelle   <br/>
     40  * @author M. Ranganathan   <br/>
     41  *
     42  */
     43 public class RecordRouteParser extends AddressParametersParser {
     44 
     45     /**
     46      * Constructor
     47      * @param recordRoute message to parse to set
     48      */
     49     public RecordRouteParser(String recordRoute) {
     50         super(recordRoute);
     51     }
     52 
     53     protected RecordRouteParser(Lexer lexer) {
     54         super(lexer);
     55     }
     56 
     57     /**
     58      * parse the String message and generate the RecordRoute List Object
     59      * @return SIPHeader the RecordRoute List object
     60      * @throws ParseException if errors occur during the parsing
     61      */
     62     public SIPHeader parse() throws ParseException {
     63         RecordRouteList recordRouteList = new RecordRouteList();
     64 
     65         if (debug)
     66             dbg_enter("RecordRouteParser.parse");
     67 
     68         try {
     69             this.lexer.match(TokenTypes.RECORD_ROUTE);
     70             this.lexer.SPorHT();
     71             this.lexer.match(':');
     72             this.lexer.SPorHT();
     73             while (true) {
     74                 RecordRoute recordRoute = new RecordRoute();
     75                 super.parse(recordRoute);
     76                 recordRouteList.add(recordRoute);
     77                 this.lexer.SPorHT();
     78                 char la = lexer.lookAhead(0);
     79                 if (la == ',') {
     80                     this.lexer.match(',');
     81                     this.lexer.SPorHT();
     82                 } else if (la == '\n')
     83                     break;
     84                 else
     85                     throw createParseException("unexpected char");
     86             }
     87             return recordRouteList;
     88         } finally {
     89             if (debug)
     90                 dbg_leave("RecordRouteParser.parse");
     91         }
     92 
     93     }
     94 
     95 
     96 }
     97