Adapter design pattern - composition adapts not only the Adpatee but all...

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David Leslie

New member
...its subclasses? I am learning the Adapter pattern. Referring to this link http://www.oodesign.com/adapter-pattern.html. It says "adapts not only the Adpatee but all its subclasses".

I am trying to understand what it means by its subclasses? When it instantiates an adaptee class how does it get its subclasses as well. :S

Cheers
 
I believe they're talking about Implementation of an Interface.

An Interface is just a blank class with a bunch of dummy functions that is to be replicated by the Class who will be implementing it. It's supposed to be a "contract" that the class implementing will promise to use those same function names as the interface.

This has got to be one of the worst explained concepts anywhere. The guys who understand it can't explain it and everyone else is clueless as to what it does like me.

ActionScript example:

public class MyClass extends SuperClass implements IInterface

By convention, interfaces have a Capital I infront of the name of the interface class itself.

I've read books, asked questions, read more articles on it and I still don't get it. I don't think the interface actually does anything physically but it's more for architectural reasons. It's something the lead programmer would setup and the subordinate programmers would follow so no one gets confused as to what functions they will name it but I'm not 100% sure.

Maybe someone else here can explain Interfaces.
 
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