/************************************************************************************
 * Copyright (C) 2008 by Politehnica University of Bucharest and Rutgers University
 * All rights reserved.
 * Refer to LICENSE for terms and conditions of use.
 ***********************************************************************************/
package vnsim.map.utils;


import java.util.*;

import vnsim.map.object.*;


/**
 * @author Victor-Radu
 */

public class ParsingUtil {

	public static Road parseRoad(byte[] buffer){
	//parses a record in RT1 format into a road object
		Road r = new Road();
		Point p;
		
		if (buffer[19] != ' ' && buffer[55] == 'A'){
			// it is a road with non-empty name field
			// we care only obut roads
			try{
				r.setId( Long.parseLong(new String(buffer, 5, 10).trim()) );
			}catch (NumberFormatException e){
				e.printStackTrace();
				return null;
			}
			r.setName( new String(buffer, 19, 30) );
		    r.setType( new String(buffer, 49, 4));
		    r.setDirectionPrefix( (new String(buffer, 17, 2)).getBytes());
		    r.setDirectionSuffix( (new String(buffer, 53, 2)).getBytes());
		    r.setRoadinfo( (new String(buffer, 55, 3)).getBytes());
		    //start and end point 
		    p = parsePoint(new String(buffer, 190, 19).getBytes());
		    if (p!= null)
				r.points.add(p);
		    else return null;
		    p = parsePoint(new String(buffer, 209, 19).getBytes());
		    if (p!= null)
				r.points.add(p);
		    else return null;
		    return r;
		}
		return null;
	}
	
	public static Point parsePoint(byte[] buffer){
	//parses a buffer into a point (longitude 10 digits, latitude 9 digits)
	// input example: buffer= " -74407665+40526477"  (longitude, latitude)
		try{
			String s = new String(buffer);
			byte[] buf = s.replace('+', ' ').getBytes();
			Point p = new Point((double)( Long.parseLong(new String(buf, 0, 10).trim())) * 1e-6f,
					(double)( Long.parseLong(new String(buf, 10, 9).trim())) * 1e-6f);
			return p;
		}catch (NumberFormatException e){
			e.printStackTrace();
			return null;
		}
	}
}