import java.util.*;

public class Acceleration {
	private double mass;
	private Map.Entry<Double, Double> force;
	private Velocity velocity;
	private Onground onground;
	private Map.Entry<Double, Double> acceleration;

	public void setMass(double mass) {
		this.mass = mass;
	}

	public void setForce(Map.Entry<Double, Double> force) {
		this.force = force;
	}

	public void updateAcceleration() {
		this.acceleration = (this.onground.getOnground()
				? new AbstractMap.SimpleEntry<>((this.force.getKey() / this.mass), 0.0)
				: new AbstractMap.SimpleEntry<>((this.force.getKey() / this.mass),
						(this.force.getValue() / this.mass)));

		velocity.setAcceleration(acceleration);
		velocity.updateAcceleration();
	}

	public Acceleration(Velocity velocity, Onground onground) {
		this.velocity = velocity;
		this.onground = onground;
	}

	public Map.Entry<Double, Double> getAcceleration() {
		return acceleration;
	}
}