[Zope3-dev] RFC - Partial Adapters

[Jim Fulton]

I've written a proposal for partial adapters:

   http://dev.zope.org/Zope3/PartialAdapters

Partial adapters support using multiple adapters to perform
a function, providing separate adaptation for independent
interfaces.

     "Consider the following example.  We need to find the objects for
     an object such that the __parent__ of the foujnd objects is the
     starting objects.  We'll call this interface !ISublocations.
     We can easily define the sublocations for !IContainer as the
     containers values.  We can also easily define the sublocations for
     a site. A site has the site manager as it's sublocation.  Now, it
     turns out that the only object that can currently be a site is a
     folder, which implements !IContainer.  We could define a
     !ISublocations adapter for !IFolder that combines the container
     values and the site manager, however, in theory, any object could
     be a site,  It would be cleaner to define !ISublocations adapters
     for !IContainer and !ISite and to be able to use both adapters
     when looking for sublocations of a folder that is also a site."

Comments are, as always, welcome.

Jim

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