Spring @ManyToOne

/* ------------------------------------------------------ */
@Entity
@Table(name="HELLO")
@NamedQuery(name="Hello.findAll", query="SELECT c FROM Hello c")
public class Hello implements Serializable {
    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(unique=true, nullable=false)
    private int id;

    @ManyToOne
    @JoinColumn(name="world_id", nullable=false)
    private World world;

    @Lob
    private String description;

    public Hello() {
    }
    // getters and setters...

}
/* ------------------------------------------------------ */
@Entity
@Table(name = "WORLD")
@NamedQuery(name = "World.findAll", query = "SELECT c FROM World c")
public class World implements Serializable {
    private static final long serialVersionUID = 1L;

    @Id
    @Column(unique = true, nullable = false)
    private int id;

    @Lob
    private String description;

    @OneToMany(mappedBy = "World")
    private List<Hello> hello;

    public World() {
    }
    // getters and setters...
}
/* ------------------------------------------------------ */
@Repository
public class DaoHello {
    @Autowired
    private SessionFactory sessionFactory;

    public Hello findById(int id) {
        return (Hello) this.sessionFactory.getCurrentSession().
                get(Hello.class, id);
    }

    public Hello findByIdMy(int id) {
        return (Hello) this.sessionFactory.getCurrentSession()
                .createQuery("SELECT n FROM Hello n JOIN FETCH n.world WHERE n.id = :id").setInteger("id", id)
                .uniqueResult();
    }
}
/* ------------------------------------------------------ */
@Controller
@RequestMapping("/hello")
public class RestController {

    @Autowired
    private Hellomanager manager;

    @RequestMapping(value="/{id}", method=RequestMethod.GET, produces=MediaType.APPLICATION_JSON_VALUE)
    public @ResponseBody Hello get1(@PathVariable("id") int id) {
        return manager.findById(id);
    }

    @RequestMapping(value="/abc/{id}", method=RequestMethod.GET, produces=MediaType.APPLICATION_JSON_VALUE)
    public @ResponseBody Hello get2(@PathVariable("id") int id) {
        return manager.findByIdMy(id);
    }
}
/* ------------------------------------------------------ */