JPAContainer and manytomany relation filter

Hi everybody,

I’m facing a little problem with JPAContainer.
The matter is that I’ve an entity with a many to many relation with itself:

@Table(name = “USERS”)
public class UserApp implements Serializable {

private static final long serialVersionUID = -8195971271846021378L;

@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long userId;

@NotNull @Size(min = 2, max = 24) private String lastName;
@NotNull @Size(min = 2, max = 24) private String firstName;
@NotNull private String email;
@NotNull private String userName;
@NotNull private String password;
@NotNull private String phoneNumber;

@NotNull private String userType;

@JoinTable(name = "professor_student", joinColumns = {
        @JoinColumn(name = "professor", referencedColumnName = "userId",
                    nullable = false) },
        inverseJoinColumns = {
        @JoinColumn(name = "student", referencedColumnName = "userId",
                nullable = false) })
@ManyToMany(cascade = CascadeType.PERSIST)
private List<UserApp> classroom;


Now, if I wanna to get all users from the table, is easy. But I can figure out what to do to get the students that “belong” to a professor.

Someone could give som advice about it?

Thanks a lot,