Question

Consider code

public List<Product> listProducts(){

    HibernateCallback callBack=new HibernateCallback(){

    public Object doInHibernate(Session session){
       Query query=session.createQuery("from Product");
       return query.list();
     }
    };
    return (List<Product>)hibernateTemplate.execute(callBack);
}

Is there anything wrong with above code? In eclipse Helios it is showing following error:

The type new HibernateCallback(){} must implement the inherited abstract method HibernateCallback.doInHibernate(Session)

doInHibernate() is implemented then why it showing the above error?

Answer 1

Make sure that Session is org.hibernate.Session, not something else (e.g. org.hibernate.classic.Session).

The pair of org.hibernate.Session and org.hibernate.classic.Session is especially tricky – since the latter interface extends the former one, accidential mistake of this kind doesn’t cause other problems and cannot be easily noticed.