Human noWeapon = new Human(null);
Human noMag = new Human(new Weapon(null));
Human hasAll = new Human(new Weapon(new Magazine(2)));

Human noWeapon = new Human(null);
Either <String, Human> either2 = new Right <String, Human>(noWeapon);
Right <String, Human> either2_right = (Right<String, Human>) either2;

either2_right.getRight().getWeapon().getMag().getCount();

abstract class Either<A, B> { }

class Left<A, B> extends Either<A, B> {
    public A left_value;
    public Left(A a)
    {
        left_value = a;
    }

    public A getLeft(){
        return this.left_value;
    }

    public <B2> Either<A,B2> flatMap(final Function<B,Either<A,B2>> f){
      return (Either<A,B2>)this;
  }

  public <B2> Either<A,B2> map(final Function<B,B2> f){
      return (Either<A,B2>)this;
  }
}

class Right<A, B> extends Either<A, B> {
    public B right_value;
    public Right(B b)
    {
        right_value = b;
    }

    public B getRight(){
        return this.right_value;
    }

    public <B2> Either<A,B2> flatMap(final Function<B,Either<A,B2>> f){
      return f.apply(right_value);
  }

  public <B2> Either<A,B2> map(final Function<B,B2> f){
      return new Right(f.apply(right_value));
  }
}

class Human {
        Weapon w;

        public Human(Weapon w)
        {
            this.w = w;
        }

        public Weapon getWeapon()
        {
            return w;
        }
    }

class Weapon {
        Magazine m;

        public Weapon(Magazine m)
        {
            this.m = m;
        }

        public Magazine getMag()
        {
            return m;
        }
    }

class Magazine {
        private int count;

        public Magazine(int c)
        {
            count = c;
        }

        public int getCount()
        {
            return count;
        }
    }