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/*
 * TimeFieldParser.java
 *
 * Created on February 25, 2002, 9:58 AM
 */
package org.lastbamboo.common.sdp.parser;


import java.text.ParseException;

import org.lastbamboo.common.sdp.fields.SDPField;
import org.lastbamboo.common.sdp.fields.TimeField;
import org.lastbamboo.common.sdp.fields.TypedTime;

/**
 * @author  deruelle
 * @version JAIN-SDP-PUBLIC-RELEASE $Revision: 1.2 $ $Date: 2004/01/22 13:26:28 $
 */
public class TimeFieldParser extends SDPParser {

	/** Creates new TimeFieldParser */
	public TimeFieldParser(String timeField) {
		lexer = new Lexer("charLexer", timeField);
	}

	/** Get the typed time
	 * @param String tokenValue to set
	 * @return TypedTime
	 */
	public TypedTime getTypedTime(String tokenValue) {
		TypedTime typedTime = new TypedTime();

		if (tokenValue.endsWith("d")) {
			typedTime.setUnit("d");
			String t = tokenValue.replace('d', ' ');

			typedTime.setTime(Integer.parseInt(t.trim()));
		} else if (tokenValue.endsWith("h")) {
			typedTime.setUnit("h");
			String t = tokenValue.replace('h', ' ');
			typedTime.setTime(Integer.parseInt(t.trim()));
		} else if (tokenValue.endsWith("m")) {
			typedTime.setUnit("m");
			String t = tokenValue.replace('m', ' ');
			typedTime.setTime(Integer.parseInt(t.trim()));
		} else {
			typedTime.setUnit("s");
			if (tokenValue.endsWith("s")) {
				String t = tokenValue.replace('s', ' ');
				typedTime.setTime(Integer.parseInt(t.trim()));
			} else
				typedTime.setTime(Integer.parseInt(tokenValue.trim()));
		}
		return typedTime;
	}

	private long getTime() throws ParseException {
		try {
			String startTime = this.lexer.number();
			return Long.parseLong(startTime);
		} catch (NumberFormatException ex) {
			throw lexer.createParseException();
		}

	}

	/** parse the field string
	  * @return TimeField 
	 */
	public TimeField timeField() throws ParseException {
		try {
			this.lexer.match('t');
			this.lexer.SPorHT();
			this.lexer.match('=');
			this.lexer.SPorHT();

			TimeField timeField = new TimeField();

			long st = this.getTime();
			timeField.setStartTime(st);
			this.lexer.SPorHT();

			st = this.getTime();
			timeField.setStopTime(st);

			return timeField;
		} catch (Exception e) {
			throw lexer.createParseException();
		}
	}

	public SDPField parse() throws ParseException {
		return this.timeField();
	}

	/**
	    public static void main(String[] args) throws ParseException {
	        String time[] = {
	                        "t=3033434331 3042462419\n",
				"t=7d 1h \n",
	                        "t=3149328700 0 \n",
	                        "t=0 0\n"
	                };
	
	
		    for (int i = 0; i < time.length; i++) {
		        TimeFieldParser timeFieldParser=new TimeFieldParser(
	                time[i] );
		        TimeField timeField=timeFieldParser.timeField();
			System.out.println("encoded: " +timeField.encode());
		    }
	
		}
	**/
}
/*
 * $Log: TimeFieldParser.java,v $
 * Revision 1.2  2004/01/22 13:26:28  sverker
 * Issue number:
 * Obtained from:
 * Submitted by:  sverker
 * Reviewed by:   mranga
 *
 * Major reformat of code to conform with style guide. Resolved compiler and javadoc warnings. Added CVS tags.
 *
 * CVS: ----------------------------------------------------------------------
 * CVS: Issue number:
 * CVS:   If this change addresses one or more issues,
 * CVS:   then enter the issue number(s) here.
 * CVS: Obtained from:
 * CVS:   If this change has been taken from another system,
 * CVS:   then name the system in this line, otherwise delete it.
 * CVS: Submitted by:
 * CVS:   If this code has been contributed to the project by someone else; i.e.,
 * CVS:   they sent us a patch or a set of diffs, then include their name/email
 * CVS:   address here. If this is your work then delete this line.
 * CVS: Reviewed by:
 * CVS:   If we are doing pre-commit code reviews and someone else has
 * CVS:   reviewed your changes, include their name(s) here.
 * CVS:   If you have not had it reviewed then delete this line.
 *
 */