proxy an interface and call a default method

[Jochen Theodorou]

Hi all,

I am looking for a solution to the following problem... I have an 
interface and an object that is supposed to serve as implementation, but 
does not implement the interface. n methods of the interface will be 
redirected to the object, but in case of default methods I would like to 
have the implementation provided by the interface. I am looking 
especially for a solution without me generating classes at runtime by hand.

Now there are several problems... I seem not to be able to invoke a 
default method by reflection. By MethodHandles I did something like this:

>       MethodHandles.Lookup.class.getDeclaredConstructor(Class.class, int.class).
>       newInstance(interfaceClass, MethodHandles.Lookup.PRIVATE).
>       unreflectSpecial(method, interfaceClass).
>       bindTo(receiver);

where receiver is a dynamic proxy, method the Method of the default 
method, interfaceClass the Class of the interface with the default method.

But I am calling a private constructor here, which is bad, plus the 
above procedure does no longer work on JDK9.

So what am I supposed to do? change from a proxy to runtime generated 
classes and hope the best for classloaders and modules not getting in my 
way?

bye Jochen