Getting a parameter used to create another parameter

Question

Hi,
I have the following interfaces:
public interface DAO<E extends Entity>
public interface ProductDAO extends DAO<Product>
public interface ClientDAO extends DAO<Client>I would like to do something like below. See the comments in testCreate().
public abstract class AbstractDAOTest<D extends DAO> extends TestCase
    public void testCreate()
        // I would like to do some think like this
        // where E represents the Entity parameter (Product, Client etc.)
        // used in the actual DAO parameter of AbstractDAOTest sublclasses:
        //   ProductDAOTest<ProductDAO> extends AbstractDAOTest
        //   ClientDAOTest<ClientDAO> extends AbstractDAOTest
        E entity = ...
}Any idea?
Thanks.
Oscar

Answer 1

Thanks for your answer.
I was indeed, thinking about something like that.
I was just wondering if there was something less verbose, as when we declare:
class ProductDAOTest<ProductDAO>it is already known that ProductDAO is a DAO parameterized with a Product Entity.
I guess that in that case the parameter Product is kind of private to the ProductDAO declaration and that there is no way to access to it unless doing what you wrote.