@Entity
@Table(name = T_RIDER, uniqueConstraints = { @UniqueConstraint(columnNames = {M_RIDER_ACCOUNT, M_RIDER_BANK_CODE}) })
public class Rider extends PlatformUser implements IRider {

    @Column(name = M_RIDER_EMAIL, unique = true, nullable = false)
    private String email;

    @Column(name = M_RIDER_PASSWORD, columnDefinition = "VARBINARY(40)")
    private byte[] password;

    @Column(name = M_RIDER_ACCOUNT)
    private String accountNo;

    @Column(name = M_RIDER_BANK_CODE)
    private String bankCode;

    @Column(name = M_RIDER_TRIPS)
    @OneToMany(targetEntity = Trip.class)
    @JoinTable(name = I_TRIP)
    private Collection<ITrip> trips;

    @Column(name = M_RIDER_PREFERENCES)
    @OneToOne(targetEntity = Preferences.class, optional = false, cascade = CascadeType.REMOVE)
    @JoinColumn(name = I_PREFERENCES, unique = true)
    private IPreferences preferences;

...}