public static DAOFactory instance(Class<?> factory) {
      try {
         log.debug("Creating concrete DAO factory: " + factory);
         return (DAOFactory) factory.newInstance();
      }
      catch (Exception ex) {
         throw new RuntimeException("Couldn't create DAOFactory: " + factory);
      }
   }

public abstract class DAOFactory {

   private static Logger log = Logger.getLogger(DAOFactory.class);

   /**
    * Creates a standalone DAOFactory that returns unmanaged DAO beans for use
    * in any environment Hibernate has been configured for. Uses
    * HibernateUtil/SessionFactory and Hibernate context propagation
    * (CurrentSessionContext), thread-bound or transaction-bound, and
    * transaction scoped.
    */
   public static final Class<HibernateDAOFactory> HIBERNATE = HibernateDAOFactory.class;
   
   /**
    * Factory method for instantiation of concrete factories.
    */
   public static DAOFactory instance(Class<?> factory) {
      try {
         log.debug("Creating concrete DAO factory: " + factory);
         return (DAOFactory) factory.newInstance();
      }
      catch (Exception ex) {
         throw new RuntimeException("Couldn't create DAOFactory: " + factory);
      }
   }
   
   //========================================================================
   // DAO INTERFACES
   //========================================================================
   
   
   
   
   ....

   
   
}

public class HibernateDAOFactory extends DAOFactory {

   
   private GenericHibernateDAO<?, ?> instantiateDAO(Class<?> daoClass) {
      try {
         GenericHibernateDAO<?, ?> dao = (GenericHibernateDAO<?, ?>)daoClass.newInstance();
         dao.setSession(getCurrentSession());
         return dao;
      }
      catch (Exception ex) {
         throw new RuntimeException("Can not instantiate DAO: " + daoClass,
               ex);
      }
   }
   
   protected Session getCurrentSession() {
      return HibernateUtil.getSessionFactory().getCurrentSession();
   }

   
   @Override
   ...

   



   
   
   
}