/************************************************************************************
 * 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.object;

import vnsim.vehicular.simulator.intersections.*;

/**
 * @author Victor-Radu
 */
public class Cross implements Comparable<Cross>, java.io.Serializable {
	
	/** <code>serialVersionUID</code> */
	private static final long serialVersionUID = -5883719321862303634L;
	
	protected int roadIndex;		// index of the current road
	protected int pointIndex;		// index of the intersection point on the current road 
	protected int crossRoadIndex;	// index of the crossing road
	protected int crossPointIndex;	// index of the intersection point on the crossing street

	public int intersectionIndex = -1; //index of the "Intersection" object in
			//the global vector "allIntersections"
	
	public Intersection intersection;

	public Cross(int roadIndex, int pointIndex, int crossRoadIndex, int crossPointIndex) {
		this.roadIndex = roadIndex;
		this.pointIndex = pointIndex;
		this.crossRoadIndex = crossRoadIndex;
		this.crossPointIndex = crossPointIndex;
	}
	
	
	public int getCrossPointIndex() {
		return crossPointIndex;
	}
	public void setCrossPointIndex(int crossPointIndex) {
		this.crossPointIndex = crossPointIndex;
	}
	public int getRoadIndex() {
		return roadIndex;
	}
	public void setRoadIndex(int roadIndex) {
		this.roadIndex = roadIndex;
	}
	public int getCrossRoadIndex() {
		return crossRoadIndex;
	}
	public void setCrossRoadIndex(int crossRoadIndex) {
		this.crossRoadIndex = crossRoadIndex;
	}
	public int getPointIndex() {
		return pointIndex; 
	}
	public void setPointIndex(int pointIndex) {
		this.pointIndex = pointIndex;
	}
	
	/**
	 * @override
	 * @param arg0
	 * @return
	 */
	public int compareTo(Cross arg0) {
		Cross c = arg0;
		int r = pointIndex - c.getPointIndex();
		if (r == 0)
			 /* this happens when there is more than one crossroads at the 
		     * same point (common)
		     */
		    r = crossRoadIndex - c.getCrossRoadIndex();
		/* cross road index could also be same at the same point when
	     * the point intersects with a circle. For example, TLID 60255246
	     * (Hardley Dr.) intersects with two different points on cross 
	     * road TLID 60290145 (also Hardley Dr.). Another example is
	     * TLID 60260224 (Academy St.) and TLID 60260225 (Brandywine Cir.).
	     * There are many such examples.
	     */
	    
		return r;
	}
}