Re: [seam-dev] Retrieving the Bean object for an interceptor

On 10-04-21 10:36 PM, Stuart Douglas wrote: > I have attempted to add a temporary fix for this issue to weld-extensions to allow interceptors to get at the AnnotatedType of the object being intercepted. > > The extension wraps the InjectionTarget of Beans that need this functionality, and the inject method of the InjectionTarget stores a mapping from the instance to the AnnotatedType in a WeakHashMap. > > I have a few questions: > > - Is InvocationContext.getTarget() guaranteed to return the instance of the bean or can it return a proxy? If it can return a proxy this technique is not going to work. > The Interceptor specification says just that "getTarget() returns the associated target instance", so that would normally mean  "the original intercepted instance". The introduction of decorators made things more complicated, and in the current implementation (1.0.1), getTarget() will return the decorator proxy if the bean has both interceptors and decorators.

However, once we move to subclassing (1.0.2), the call will return the single instrumented instance, which is essentially a subclass of the bean class. It would be necessary to retrieve the original bean class from that. But I can see a few options for doing that, one being a mixin interface with methods that can retrieve information about the original type of the target object.