[Zope3-Users] Override subscribers

[Marius Gedminas]

On Sun, Feb 17, 2008 at 09:21:24AM +0100, Kai Diefenbach wrote:
> is there a way to override subscriber?

No, unfortunately.

> My scenario is as follows: 
> 
> There is an object. If it has been initialized some subscribers are
> called (via IObjectInitializedEvent).
> 
>      class SomeObject:
>          implements(ISomeObject)
> 
> There is an extended object:
> 
>    class ISomeExtendedObject(ISomeObject)
>   
>    class SomeExtendedObject(SomeObject):
>           implements(ISomeExtendedObject)
> 
> Some subscribers needn't be called after SomeExtendedObject has been
> initialized.

I would suggest you restructure your class/interface hierarchy so that
I/SomeExtendedObject doesn't inherit from I/SomeObject directly, but instead
inherits from a common abstract base interface/class.

I think it's called the dependency inversion principle of object-oriented
design.

Marius Gedminas
-- 
The difference between Microsoft and 'Jurassic Parc':
In one, a mad businessman makes a lot of money with beasts that should be
extinct.
The other is a film.
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