On Thursday 11 April 2002 08:01 am, Geoffrey Talvola wrote:
> I would propose a similar solution, but without methods. Use this as
> the test in ServletFactory in place of the current assertion:
>
> # A class is useable as a Servlet if it is derived from
> Servlet OR if it contains an _isServlet
> # class attribute that evaluates as true.
> if not issubclass(theClass, Servlet) and getattr(theClass,
> '_isServlet', 0):
> raise RuntimeError, 'blah blah blah'
>
> And then if you want to use a class not derived from Servlet as a
> servlet, you just need to do:
>
> class MyFakeServlet:
> _isServlet = 1
> ...
>
> The Servlet class itself doesn't need to change at all.
>
> My rationale is that this is a fixed property of a particular class,
> so it should be a class attribute, rather than a method. Or another
> way of putting it is that you shouldn't have to instantiate the class
> to find out if it's useable as a servlet.
I agree, but then it seems we should just put _isServlet=1 in
Servlet.py and skip the issubclass() call:
if not getattr(theClass, '_isServlet', 0):
raise ...
-Chuck
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