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/*
* 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 gov.nist.javax.sip.parser;

import gov.nist.javax.sip.header.*;
import gov.nist.core.*;
import java.text.ParseException;

/**
 * Parser for Priority header.
 *
 * @version 1.2 $Revision: 1.8 $ $Date: 2009-07-17 18:58:02 $
 *
 * @author Olivier Deruelle   

 * @author M. Ranganathan   

 *
 *
 *
 * @version 1.0
 */
public class PriorityParser extends HeaderParser {

    /**
     * Creates a new instance of PriorityParser
     * @param priority the header to parse
     */
    public PriorityParser(String priority) {
        super(priority);
    }

    /**
     * Constructor
     * @param lexer the lexer to use to parse the header
     */
    protected PriorityParser(Lexer lexer) {
        super(lexer);
    }

    /**
     * parse the String header
     * @return SIPHeader (Priority object)
     * @throws SIPParseException if the message does not respect the spec.
     */
    public SIPHeader parse() throws ParseException {

        if (debug)
            dbg_enter("PriorityParser.parse");
        Priority priority = new Priority();
        try {
            headerName(TokenTypes.PRIORITY);

            priority.setHeaderName(SIPHeaderNames.PRIORITY);

            this.lexer.SPorHT();
            /*this.lexer.match(TokenTypes.ID);
            Token token = lexer.getNextToken();

            priority.setPriority(token.getTokenValue());
            */
            // This is in violation of the RFC but
            // let us be generous in what we accept.
            priority.setPriority(this.lexer.ttokenSafe());

            this.lexer.SPorHT();
            this.lexer.match('\n');

            return priority;
        } finally {
            if (debug)
                dbg_leave("PriorityParser.parse");
        }
    }


    public static void main(String args[]) throws ParseException {
    String p[] = {
            "Priority: 8;a\n"
            };

    for (int i = 0; i < p.length; i++ ) {
        PriorityParser parser =
          new PriorityParser(p[i]);
        Priority prio= (Priority) parser.parse();
        System.out.println("encoded = " + prio.encode());
    }
    }

}