[Zope3-dev] Re: adapter registration question

[Philipp von Weitershausen]

Jean-Marc Orliaguet wrote:
> str(123) has the same syntax as IZopeDublinCore(myobj), but semantically 
> there is nothing in common between the two expressions.

I disagree.

   >>> IZopeDublinCore(obj)

is a flexible version of

   >>> ZDCAnnotatableAdapter(obj)

Flexible, because a different implementation that ZDCAnnotatableAdapter 
might be used. That's dispatched through the adapter registry.

> IZopeDublinCore(myobj) does an adapter lookup based on the type of 
> 'myobj' 

That's the lookup in the registry (part 1 of the adapter call)

> and returns an adapter instance with myobj as context, ready to 
> be used.

That's the instantiation a la str(123) (part 2 of the adapter call)

> but what problem is all this supposed to solve? are you guys writing a 
> PhD or something .-) ?

Heh, now that you mention it... ;)


-- 
http://worldcookery.com -- Professional Zope documentation and training