[Zope3-dev] Containment constraints

[Chris Withers]

Stephan Richter wrote:
> On Thursday 12 June 2003 06:19, Jim Fulton wrote:
> 
> Couldn't we just have a list of allowable interfaces? If an object implements 
> one of the listed interfaces, it can be added.
> 
> One the other hand, an isAllowed() method might be best, so you could 
> implement things like all interfaces except IFoo. I would make that method a 
> method of IContainer.

How does this handle the case when the object wants to veto it's creation in a 
given container?

cheers,

Chris