Flash.utils.Proxy Question

Question

hi list,
I am trying to extend flash.utils.Proxy so that I can
intercept calls
made on an innerObject and provide cross cutting
services/advices like
writing to a log or caching... (AOP...)
The big problem is that the user of the innerObject needs to
be aware
of the ProxyClass otherwise - calls will not be intercepted.
for example:
a proxy factory class looks like this-
public class ProxyFactory
private var _target:*;
public function ProxyFactory(target:*){
_target = target;
public function GetProxy():*{
var proxy:AOPProxy = new AOPProxy(_target);
return (proxy);
and the usage:
var person:Person = factory.GetProxy();
this will produce a runtime casting exception!!
the fix is to do something like this:
var person:AOPProxy = factory.GetProxy();
or even -
var person:* = factory.GetProxy();
BUT - this is bad because the user of the factory is aware of
the
proxy AND he loose code assist... he cannot see the
properties of the
Person Class.
Does anybody know of a better way (maybe creating runtime
code
generated proxies??- code emission...)
Thanks,
Chen Bekor
Software Architect.

Answer 1

quote:
it looks a bit strange for a developer to have to instantiate
objects via a factory to get some AOP functionality. Doesn't this
tie you down to the specific AOP framework you are using, or am I
missing something?
I agree - it was just an example - the question is does
flash.utils.Proxy is the proper direction to provide AOP in
ActionScript3?
quote:
Have you checked out the AOP framework of as2lib (
http://www.as2lib.org/)?
yes I did - its ActionScript2 - and it use deprecated API in
ActionScript3
- I'm trying to write my own AOP implementation to
Flex...
- do you have any idea?