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<DIV><FONT face=Arial size=2><SPAN
class=430533513-22122004>Hi</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=430533513-22122004></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=430533513-22122004>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.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=430533513-22122004></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=430533513-22122004>Regards</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=430533513-22122004>Bob</SPAN></FONT></DIV>
<DIV> </DIV>
<DIV align=left><FONT face=Arial size=2></FONT> </DIV>
<DIV align=left><FONT face=Arial size=2></FONT> </DIV>
<DIV align=left><FONT face=Arial size=2>Bob Cowdery</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>CGI Senior Technical
Architect</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>+44(0)1438 791517</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Mobile: +44(0)7771 532138</FONT></DIV>
<DIV align=left><FONT face=Arial size=2><A
href="mailto:bob.cowdery@cgi-europe.com">bob.cowdery@cgi-europe.com</A></FONT></DIV>
<DIV align=left><FONT face=Arial size=2></FONT> </DIV>
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