Hibernate

Doc: http://docs.jboss.org/hibernate/orm/4.2/

DAO

package cz.isn.example.dao;
 
import cz.isn.example.model.User;
import java.util.List;
 
/**
 *
 * @author Jiří Blažek <jiri.blazek@isn.cz>
 */
public interface UserDao {    
 
    public List<User> findAll();
 
    public User findById(long id);
 
    public void saveUser(User user);
 
    public void updateUser(User user);
 
    publid void deleteUser(User user);
}

UserDaoImpl.java

package cz.isn.example.dao;
 
import cz.isn.example.model.User;
import java.util.ArrayList;
import java.util.List;
import org.hibernate.Query;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
 
/**
 *
 * @author Jiří Blažek <jiri.blazek@isn.cz>
 */
@Component("userDao")
public class UserDaoImpl implements UserDao {
 
    @Autowired
    private SessionFactory sessionFactory;
 
    @Override
    public List<User> findAll() {
        List<User> users = sessionFactory.getCurrentSession()
                .createQuery("from User u")
                .list();
 
        if (!users.isEmpty()) {
            return users;
        } else {
            return null;
        }
    }
 
    @Override
    public User findById(long id) {
        List<User> users = sessionFactory.getCurrentSession()
                .createQuery("from User u where u.id = :id")
                .setLong("id", id)
                .list();
 
        if (!user.isEmpty()) {
            return users.get(0);
        } else {
            return null;
        }                
    }
 
    @Override
    public void saveUser(User user) {
        sessionFactory.getCurrentSession().save(user);
    }
 
    @Override
    public void updateUser(User user) {
        sessionFactory.getCurrentSession().update(user);
    }
 
    @Override
    public void deleteUser(User user) {
        sessionFactory.getCurrentSession().delete(user);
    }
 
    public void setSessionFactory(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }
 
    public SessionFactory getSessionFactory() {
        return this.sessionFactory;
    }
}