Hi
I am trying to build
a capability based API. That is, an instance of the api will reflect the
capabilities of some underlying services. I could have several different
instances of the api concurrently running against different back end services. A
ui applet will bind to an api instance. I want to make this easy to use from the
ui perspective so I envisage exposing a number of properties as the variable
part can be represented by properties. I want a property to exist only if a
capability is available so it is easily tested. I have tried using Property and
Metaclasses to do this and although both work I can't figure out how to make
multiple different instances as both get executed on 'import' and thus only one
instance can be created. Inside the metaclass I have to get hold of the
capability map I want to build the instance against. The only way I can see to
do this at the moment is to have a metaclass for each capability type and
hardcode the type inside it, then pick the appropriate metaclass when I build
the implementation class.
Regards
Bob
Bob Cowdery
CGI Senior Technical
Architect
+44(0)1438 791517
Mobile: +44(0)7771 532138
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