Casting a $proxy2 instance

Hi,

i have a problem with casting the $proxy2 instance.

I have an interface: public interface ResourceManager
and an implementation of it: 
public class ResourceManagerImpl
        extends AbstractLogEnabled
       implements ResourceManager, Configurable, Initializable, Disposable, Serviceable, ThreadSafe, Contextualizable, Component

when i use in a second class called DefaultComponentManager, implementing the interface Serviceable, the lookup method it returns an instance of a dynamic proxy class called $proxy2. i can only cast this proxy class instance into an instance of the interface, but i need an instance of the implementation class ResourceManagerImpl. how can i get this object the dynamic proxy class was instatiated??

public void service(ServiceManager serviceManager ) throws ServiceException
    {
    	ComponentEventListener listener = ( ComponentEventListener ) serviceManager.lookup( ComponentEventListener.ROLE );
    	Object resourceManager = serviceManager.lookup( ResourceManager.ROLE );
    	TransactionManager txm = (TransactionManager ) serviceManager.lookup( TransactionManager.class.getName() );

        final org.apache.avalon.framework.component.DefaultComponentManager dcm =
                new org.apache.avalon.framework.component.DefaultComponentManager();
        
        setupLogger(dcm, "System");
        dcm.put(ResourceManager.ROLE, (Component) resourceManager);
        dcm.put(ComponentEventListener.ROLE, (Component)listener);
        dcm.put(UserTransaction.class.getName(), new UserTransactionImpl(txm, listener));
        dcm.makeReadOnly();

        m_ComponentManager = new ExComponentManager( listener, dcm, this.getClass().getClassLoader() );
    }

Greets,

André Steinkamp