[Zope3-dev] Chapter 1 Step 6 now available

[Steve Alexander]

On Wed, 20 Feb 2002, Martijn Faassen wrote:

> Steve Alexander wrote:
> [snip]
> > That very accurately describes what my Decorator class does. The 
> > interface it declares, via __implements__, is exactly the same as the 
> > component it is decorating. However, it adds certain operations that 
> > views can use *if* they know about them.
> 
> Isn't that scary?

yes :-)

> I mean, if I understand it well, a decorated object
> supplies extra interfaces, but there's no way to find out by
> checking __implements__ or using the introspection tools of the 
> interfaces package, right? You just have to 'know' about this, and 
> that could be troublesome -- it's why we want interfaces in the first
> place.
> 
> Or am I missing something?

No. You're quite right, and this is something I want to add to
Decorator.py in the future. However, for my current purposes, the
Decorator is only used within a single View component, so the interfaces
don't matter -- no other components get to see them.