I'm using Unity to resolve types dynamically for a pluggable architecture. I'm also using interception to apply business rule validation via AOP (using ValidationAspects). Finally, I'm using NHibernate as an ORM to persist domain objects.
In order for AOP to work, we use the VirtualMethodInterceptor, as interface interception doesn't work with NHibernate. I have a facade over ISession that handles casting between interface and real types for repository operations.
To make sure that all objects in the graph fetched via NHibernate are properly proxied for AOP, I made an NH IInterceptor implementation and overrode the Instantiate() method, so I could supply NH with created objects rather than have it call new(). I then use Container.Resolve() to get back proxied objects with the validation injected, and give this back to NH to populate. This works OK.
The problem comes when the session flush occurs. NHibernate gets upset because the objects it sees in the graph are of the proxy type rather than the real type. The way we're mapping (all via property, all virtual) NH should be able to get all the values it needs via the proxy, if I could override the type-checking.
What I need to know is: given a transparently proxied object created by Unity with Interception enabled, is there a) any way to obtain a direct reference to the 'real' instance it's proxying, or b) to override NH and tell it to treat objects of a proxy type as if it were of a known mapped type, dynamically at runtime?