-import org.hibernate.HibernateException;
-import org.hibernate.Session;
-import org.hibernate.criterion.Expression;
-import org.springframework.orm.hibernate3.HibernateCallback;
-import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
-import org.springframework.orm.jpa.JpaTemplate;
-import org.springframework.orm.jpa.support.JpaDaoSupport;