[Zope3-dev] Re: a new zcml directive?

[Jean-Marc Orliaguet]

Martijn Faassen wrote:

> Jean-Marc Orliaguet wrote:
> [snip]
>
>>
>> excuse me, but can someone explain what problem the pattern / 
>> workaround is supposed to fix, does it create and return a default 
>> annotation value in case an annotation key does not exist? shouldn't 
>> the annotation machinery be "fixed" instead to provide 
>> getAnnotation(..., default=...) ?
>
>
> I thought I described it in my initial post.
>
> I was looking for a way to register annotations for objects (and 
> create them if they aren't there yet) without having to write fairly 
> long bits of code for each annotation factory.
>
> I just want to be able to say:
>
> myannotation = IFoo(obj)
>
> where IFoo is the interface of an annotation of the obj. The only 
> place I worry about it being an annotation is in the registration 
> code. No need to import anything else from that package. Whether it 
> needs to create a new annotation or get an existing one is an 
> implementation detail.
>
> Regards,
>
> Martijn


OK, basically you mean that the 'annotations' given in your original 
post should implement a 'setdefault' method?

regards
/JM