/*
* Objects in Java retain knowledge of their creation
* class even when they are cast to another class. As a
* result, dynamic dispatch means that the function is
* called from bb
AA: AA
BB: BB
bb cast to AA: BB
Had java used static method dispatch the output would be
AA: AA
BB: BB
bb cast to AA: AA

* @author gtowell
*created: Sep 26. 2021
* modified: Sep 2022 gtowell
*/

public class DMD {
    // a class
    private class AA {
        @Override
        public String toString() {
            return "AA!";
        }
    }

    // another class, inherits from first
    private class BB extends AA {
        @Override
        public String toString() {
            return "BB!!";
        }
    }


    public static void main(String[] args) {
        new DMD().doWork();
    }

    // Just print the argument using its toString
    public void prA(AA item) {
        System.out.println(item);
    }

    public void doWork() {
        AA aa = new AA();
        BB bb = new BB();
        System.out.println("Just calling the toString methods of each inner class");
        System.out.println("AA: " + aa);
        System.out.println("BB: " + bb);
        System.out.println("aa left as AA is function call");
        prA(aa);
        System.out.println("bb coerced to AA is function call");
        prA(bb);

    }
}