How to create a Generic DAO class using Hibernate Context sessions?

The generics cannot be used in that way. Change your GenericDAOImpl to have a constrctor that takes the class and use that class in the session. Get call.

See the example below (it uses JPA instead of bernate specific classes).

The generics cannot be used in that way. Change your GenericDAOImpl to have a constrctor that takes the class and use that class in the session. Get call.

See the example below (it uses JPA instead of bernate specific classes). Public class GenericDao { @PersistenceContext private EntityManager em; public EntityManager em() { return em; } public void create(final T entity) { em. Persist(entity); } public void update(final T entity) { em.

Merge(entity); } protected T get(final Class type, final String id) { return em. Find(type, id); } public void delete(final T entity) { em. Remove(entity); } } public class PersonDao extends GenericDao{ public Person get(final String id) { return get(Person.

Class, id); } } Also, it is better to put @Transactional annotations on business or data services, not on DAOs.

The following trick is often used in generic DAO classes to access type parameters of actual subclasses: public abstract class GenericDAO { private Class persistentClass; ... @SuppressWarnings("unchecked") public GenericDAO() { this. PersistentClass = (Class) ((ParameterizedType) getClass(). GetGenericSuperclass()).

GetActualTypeArguments()0; } public T get(ID id) { return (T) session. Get(persistentClass, id); } ... } And the actual DAO subclass: public class FooDAO extends GenericDAO {}.

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