[Zope3-dev] Ranking adapters

[Shane Hathaway]

Jim Fulton wrote:
> The most important factor is the interface being adapted.
> The second most important factor is location.
> The third most important factor is the interface being adapted to.
> 
> If we want a B, we don't really care much whether we get a B, a B1,
> or a B2.  It's fairly important to be able to override things locally,
> but it's not as important as getting an adapter tailored to the object.

My intuition ranks location before the interface being adapted.  A 
location may be a complete, constrained application, and I don't want 
sitewide policies to override local policies.

Let's say I use Zope to make a bunch of kiosks for developing film. 
Kiosks usually have a touch screen and no keyboard, so I can't use any 
web forms.  Let's also say that I construct the kiosk application as a 
local application rather than a global application.  I need to be sure 
that global adapters don't leak through to the local application; 
otherwise some global adapter could cause a UI to appear on the screen 
that the user can't possibly use.

Again, this is only intuition.  If you disagree, I'll spend some time to 
discover more specific reasoning.

Shane