OO Design question
Hi,
this is my question:
I have some heterogen classes lets say:
class A, class B, class C and class D
class A implements
method a
method b
method c
method d
method z
class B implements
method e
method f
method c
method d
method z
class C implements
method g
method h
method i
method j
method z
class C implements
method k
method l
method i
method j
method z
I'd like to group all common methods in a single class. How can i do this?
Thanks a lot.
Hardly a patterns question, and not very advanced, either.
You have a couple of choices, depending on whether you prefer inheritance or composition. You can have three interfaces or abstract classes:
public interface CDInterface
{
void c();
void d();
}
public interface ZInterface
{
void z();
}
public interface IJInterface
{
void i();
void j();
}
Now your classes look like this:
class A implements CDInterface, ZInterface
{
public void a();
public void b();
public void c();
public void d();
public void z();
}
Class B implements CDInterface and ZInterface
Class C implements IJInterface and ZInterface
Class D implements IJInterface and ZInterface
If they all share implementation, make those interfaces abstract classes.
I don't know what this buys you.
%
> > Hardly a patterns question
>
> I realized it is not a patterns question that's why i
> decided to post it at Programming Forum.
Don't post it twice.
> Thanks anyway
What's this? You don't like the answer? Not what you had in mind? This is a perfectly good reply. "Thanks anyway" implies "this wasn't helpful". If that's so, what else could you be looking for?
It's a better answer than your question deserves.
%
> I'd like to group all common methods in a single> class. How can i do this?There's also a why. A class or an interface preferrably is a coherent type with a specific behaviour, and not just an arbitrary collection of unrelated methods.
