[Zope3-dev] Re: Event fixes

[Jim Fulton]

Florent Guillaume wrote:
> Dominik Huber wrote:
> 
>> The modification descriptiors were introduced by Uwe Ostermeier to 
>> handle the versioning and cataloging stuff.

I seem to remember some discussion of this.  It provided a way to give
hints about what was changed.

 >> I'm not an expert in that
>> field, but in my understanding the modification descriptors are more 
>> general and your case is a subset that could be handled with them. As 
>> a developer, I would still prefer one concept, because it's easier to 
>> adapt. Sufficiently fundamental cases are always a shaky 
>> discrimination to differ two concepts for future implementation 
>> decisions.
> 
> 
> If you don't feel that containment boundaries are a sufficiently 
> fundamental concept, then we have a strong disagreement. I stand by what 
> I checked in.
> 
> And BTW with "modification descriptions" I couldn't write a simple 
> adapter for this. I'd have to have a generic adapter for 
> IObjectModifiedEvent, then iterate over all the descriptions and filter 
> by hand. Yuck.

This is definately an advantage of the type-based approach.

OTOH, I think a description-based approach could be made to work.
I wonder if there are worked-out description-based strategies.
I worry that, while the description-based strategy has some
potential merit, it isn't adequately worked out.

Jim

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