abstract methods/polymorphism

[Mark Destrampe]

I have declared an abstract method in an abstract class at the top of a hierarchy.
Two more abstract classes derive from the parent class. Then two more concrete
classes derive off of each of the former two abstract classes, thus making
four concrete classes at the bottom of the hierarchy. The methods that are
being called by the abstract method is are at the bottom of the hierarchy,
how do I make the two intermediate classes of the hierarchy recognize this
abstract method so that the bottom classes of the hierarchy will recognize
the abstract method?

[Kent]

Mark,

Sounds like you need to consider redesigning. If the top-level abstract class
needs to invoke methods defined in it's subclasses then this is a flawed
design.

Is it possible that the methods these abstract methods are invoking are relevant
to the top level class? If so, move them into the top level class and declare
them abstract.

Perhaps post some code to better illustrate...

Regards,
Kent


"Mark Destrampe" <mrdestra6008@webmail.winona.edu> wrote:
>
>I have declared an abstract method in an abstract class at the top of a
hierarchy.
> Two more abstract classes derive from the parent class. Then two more
concrete
>classes derive off of each of the former two abstract classes, thus making
>four concrete classes at the bottom of the hierarchy. The methods that
are
>being called by the abstract method is are at the bottom of the hierarchy,
>how do I make the two intermediate classes of the hierarchy recognize this
>abstract method so that the bottom classes of the hierarchy will recognize
>the abstract method?