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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
*
* .
*
*/
/*******************************************************************************
* Product of NIST/ITL Advanced Networking Technologies Division (ANTD).        *
*******************************************************************************/
package gov.nist.javax.sip.header;

import javax.sip.header.*;

import java.nio.Buffer;
import java.text.ParseException;

/**
 * the Priority header.
 *
 * @author Olivier Deruelle 

 * @version 1.2 $Revision: 1.7 $ $Date: 2010-05-06 14:07:53 $
 *
 *
 *
 */
public class Priority extends SIPHeader implements PriorityHeader {

    /**
     * Comment for serialVersionUID
     */
    private static final long serialVersionUID = 3837543366074322106L;

    /** constant EMERGENCY field
    */
    public static final String EMERGENCY = ParameterNames.EMERGENCY;

    /** constant URGENT field
     */
    public static final String URGENT = ParameterNames.URGENT;

    /** constant NORMAL field
     */
    public static final String NORMAL = ParameterNames.NORMAL;

    /** constant NON_URGENT field
     */
    public static final String NON_URGENT = ParameterNames.NON_URGENT;
    /** priority field
     */
    protected String priority;

    /** Default constructor
     */
    public Priority() {
        super(NAME);
    }

    /**
     * Encode into canonical form.
     * @return String
     */
    public StringBuilder encodeBody(StringBuilder buffer) {
        return buffer.append(priority);
    }

    /**
     * get the priority value.
     * @return String
     */
    public String getPriority() {
        return priority;
    }

    /**
     * Set the priority member
     * @param p String to set
     */
    public void setPriority(String p) throws ParseException {
        if (p == null)
            throw new NullPointerException(
                "JAIN-SIP Exception,"
                    + "Priority, setPriority(), the priority parameter is null");
        priority = p;
    }
}