Point.java

package simulator;

/*
 * Class point is a point on the graph and also a possible candidate
 * solution for the problem.
 */
public class Point {

	// x,y coords of point and its solution
	private double x;
	private double y;
	private double fitness;

	// flags to check whether or not coords and soln are initialized before
	// getting them
	private Boolean isCoordSet = false;
	private Boolean isFitnessSet = true;

	// constructor to init points
	Point(double d, double e) {
		isCoordSet = true;
		this.x = d;
		this.y = e;
	}

	@Override
	public String toString() {
		return "(" + this.x + "," + this.y + "):" + this.fitness;
	}

	// set solution to this point object
	public void setFitness(double f) {
		isFitnessSet = true;
		this.fitness = f;
	}

	// getters for x, y and solution
	public double getX() throws PointUsageException {
		if (isCoordSet)
			return this.x;
		else
			throw new PointUsageException("coords not set");
	}

	public double getFitness() throws PointUsageException {
		if (isFitnessSet)
			return this.fitness;
		else
			throw new PointUsageException("fitness for this point not set yet");
	}

	public double getY() throws PointUsageException {
		if (isCoordSet)
			return this.y;
		else
			throw new PointUsageException("coords not set");
	}
}