/*
 * Portions Copyright  2000-2007 Sun Microsystems, Inc. All Rights
 * Reserved.  Use is subject to license terms.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 only, as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License version 2 for more details (a copy is
 * included at /legal/license.txt).
 * 
 * You should have received a copy of the GNU General Public License
 * version 2 along with this work; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 * 
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions.
 */
package gov.nist.siplite.parser;

import gov.nist.siplite.header.*;
import gov.nist.core.*;

/**
 * Parser for Event header.
 *
 * @version JAIN-SIP-1.1
 *
 * <a href="{@docRoot}/uncopyright.html">This code is in the public domain.</a>
 *
 * @version 1.0
 */
public class EventParser extends ParametersParser {
    /** Default constructor. */
    EventParser() {}
    
    /**
     * Creates a new instance of EventParser.
     * @param event the header to parse
     */
    public EventParser(String event) {
        super(event);
    }
    
    /**
     * Constructor with initial lexer engine.
     * @param lexer initial lexer engine
     */
    protected EventParser(Lexer lexer) {
        super(lexer);
    }
    
    /**
     * Parses the String message.
     * @return Header (Event object)
     * @throws SIPParseException if the message does not respect the spec.
     */
    public Header parse() throws ParseException {
        
        if (debug) dbg_enter("EventParser.parse");
        
        try {
            headerName(TokenTypes.EVENT);
            this.lexer.SPorHT();
            
            EventHeader event = new EventHeader();
            this.lexer.match(TokenTypes.ID);
            Token token = lexer.getNextToken();
            String value = token.getTokenValue();
            
            event.setEventType(value);
            super.parse(event);
            
            this.lexer.SPorHT();
            this.lexer.match('\n');
            
            return event;
            
        } catch (ParseException ex) {
            throw createParseException(ex.getMessage());
        } finally {
            if (debug) dbg_leave("EventParser.parse");
        }
    }
    
    /*
    public static void main(String args[]) throws ParseException {
    String r[] = {
        "Event: presence\n",
        "Event: foo; param=abcd; id=1234\n",
        "Event: foo.foo1; param=abcd; id=1234\n"
    };
     
    for (int i = 0; i < r.length; i++) {
        EventParser parser =
        new EventParser(r[i]);
        EventHeader e = (EventHeader) parser.parse();
        System.out.println("encoded = " + e.encode());
        System.out.println("encoded = " + e.clone());
        System.out.println(e.getEventId());
        System.out.println(e.match(e));
    }
    }
    */
}