after.java

public class Battle<LionPlayer, BearPlayer> {
  	private LionPlayer Lion;
	private BearPlayer Bear;

	private void Lion$fight(){
		System.out.println(Lion.getName() + ": meow...");
	};

	private void Bear$fight(){
		System.out.println(Bear.getName() + ": grrr...");
	}

	private void Bear$touch(){
		Bear$fight();
		Bear.say();
		Bear.say();
		Lion$fight();
	}

	public Battle(LionPlayer lionPlayer, BearPlayer bearPlayer) {
		Lion = lionPlayer;
		Bear = bearPlayer;
		Bear$touch();
	} 
}

input.java

@Context
public class Battle<LionPlayer, BearPlayer> {
	@Role(LionPlayer)
	private class Lion {
		void fight(){
			System.out.println(this.getName() + ": meow...");
		}
	}
	
	@Role(BearPlayer)
	private class Bear {
		void fight(){
			System.out.println(this.getName() + ": grrr...");
		}
		void touch(){
			Bear.fight();
			Bear.say();
			this.say();
			Lion.fight(); 
		}
	}
	
	public Battle(LionPlayer lionPlayer, BearPlayer bearPlayer) {
		Lion = lionPlayer;
		Bear = bearPlayer;
		Bear.touch();
	} 
}