package jmultimethod;

public class AsteroidTest {
	
	class Asteroid {}
	
	class Spaceship {}

	@Multi("collide")
	public void collideOO(Object X, Object Y) {
	   log("?? Bang, what happened? ", X, Y);
	}

	@Multi("collide")
	public void collideAA(Asteroid X, Asteroid Y) {
		log("AA Look at the beautiful fireworks! ", X, Y);
	}

	@Multi("collide")
	public void collideAS(Asteroid X, Spaceship Y) {
		log("AS Is it fatal? ", X, Y);
	}

	@Multi("collide")
	public void collideSA(Spaceship X, Asteroid Y) {
		log("SA Is it fatal? ", X, Y);
	}

	@Multi("collide")
	public void collideSS(Spaceship X, Spaceship Y) {
		log("SS Who's fault was it? ", X, Y);
	}

	@Multi("collide")
	public void collide1S(String X, Spaceship Y) {
		log("1S any string? ", X, Y);
	}

	@Multi("collide")
	public void collide2S(@V("hi") String X, Spaceship Y) {
		log("2S 'hi' value? ", X, Y);
	}

	protected Multimethod mm = new Multimethod("collide", getClass());
	
	public void collide(Object X, Object Y) {
		mm.invoke(this, X, Y);
	}

	public void run() {
		Object A = new Asteroid();
		Object S = new Spaceship();
		collide(A, A);
		collide(A, S);
		collide(S, A);
		collide(S, S);
		collide(A, 1);
		collide(2, A);
		collide(S, 3);
		collide(4, S);
		collide(5, null);
		collide(null, null);
		collide("hi", S);
		collide("hello", S);
	}

	public void log(Object... args) {
		for(Object o: args) {
			if(o instanceof String) {
				System.out.print(" " + (String) o);
			} else {
				System.out.print(" " + o);
			}
		}
		System.out.println();
	}
	
	public static void main(String[] args) throws Exception {
		AsteroidTest t = new AsteroidTest();
		t.run();
	}
}