Class derivation on the fly - Visitor Pattern

Question

I would like to create visitor pattern in such a way

public interface Visitable<T>{
   public void accept(T visitor);
}

public interface SomeBusinessService implements Visitable<SomeVisitor>{

  public void mtd1();
  public void mtd2();
}

public abstract class SomeBusinessBean1 implements SomeBusinessService {
   public void mtd1(){}
   public void mtd2(){}
} 

public abstract class SomeBusinessBean2 implements SomeBusinessService {
   ...
}

and so on

then I would like to create a factory

public class SomeBusinessServiceFactory {
   public SomeBusinessService createService
                 (Class<? extends SomeBusinessService> clazz ){
      //do some stuff to create appropriate class derivation on the fly
     // that will have accept() method implemented 
   }
}

and I could invoke it in the following way

SomeBusinessService  service = 
    SomeBusinessServiceFactory.createService(SomeBusinessBean1.class);

With this approach I would't have to create comman abstract class for all beans that implement Visitor interface accept() method.

This solution could also be used in situations where we would like to have a common behaviour of specific methods depending on service factory per class hierarchy.

Is there any way to do that with standard jdk or maybe I need to use external tools like cglib or maybe what I'm saying is rubbish and we can achive that goal in some other way.

Tx in advanced

Answer 1

If you are looking for a way to create a class instance from its class object than have a look at the java reflection api.

clazz.newInstanze();

or

clazz.getConstructors(...).newInstance(...);