6:42 a.m.
Thanks,
this is a excerpt of the code:
Class Person:
| @Entity
| public class Persona implements Serializable {
|
| @EmbeddedId
| private PersonaPK pK;
|
| @Transient
| private Pais pais;
|
| private String nombre;
|
| private String numTelefono;
|
| /** Creates a new instance of Persona */
| public Persona() {
| }
|
|
|
|
| public String getNombre() {
| return nombre;
| }
|
| public void setNombre(String nombre) {
| this.nombre = nombre;
| }
|
| public String getNumTelefono() {
| return numTelefono;
| }
|
| public void setNumTelefono(String numTelefono) {
| this.numTelefono = numTelefono;
| }
|
| public String toString() {
| return "" + this.getPK().getDni();
| }
|
|
| @JoinColumn(name="IDPAIS")
| @ManyToOne
| public Pais getPais() {
| return pais;
| }
|
| public void setPais(Pais pais) {
| this.pais = pais;
| }
|
| public PersonaPK getPK() {
| return pK;
| }
|
| public void setPK(PersonaPK pK) {
| this.pK = pK;
| }
|
| @Transient
| public Long getDni() {
| return pK.getDni();
| }
|
| public void setDni(Long dni) {
| pK.setDni(dni);
| }
|
| }
|
Class Country
| @Entity
| public class Pais implements Serializable {
|
| @Id
| @GeneratedValue(strategy = GenerationType.AUTO)
| private Long id;
|
|
| private String nombre;
|
| private String moneda;
|
| @OneToMany(mappedBy="pais")
| private List<Persona> habitantes;
|
| /** Creates a new instance of Pais */
| public Pais() {
| }
|
| public Long getId() {
| return id;
| }
|
| public void setId(Long id) {
| this.id = id;
| }
|
| public String toString() {
| //TODO change toString() implementation to return a better display name
| return "" + this.getId();
| }
|
| public String getNombre() {
| return nombre;
| }
|
| public void setNombre(String nombre) {
| this.nombre = nombre;
| }
|
| public String getMoneda() {
| return moneda;
| }
|
| public void setMoneda(String moneda) {
| this.moneda = moneda;
| }
|
| public List<Persona> getHabitantes() {
| return habitantes;
| }
|
| public void setHabitantes(List<Persona> habitantes) {
| this.habitantes = habitantes;
| }
|
| }
|
|
|
And the primary key
| @Embeddable
| public class PersonaPK implements Serializable {
|
|
| private Long dni;
|
|
| private Long idPais;
|
| /** Creates a new instance of PersonaPK */
| public PersonaPK() {
| }
|
| public PersonaPK(Long dni,Long idPais) {
| this.dni=dni;
| this.idPais=idPais;
| }
|
| public String toString() {
| return "" + this.getDni();
| }
|
|
| @Id
| public Long getDni() {
| return dni;
| }
|
| public void setDni(Long dni) {
| this.dni = dni;
| }
|
|
|
| public boolean equals(Object obj) {
| if (obj == this) return true;
| if (!(obj instanceof PersonaPK))
| return false;
| PersonaPK pk = (PersonaPK)obj;
|
| if (!getDni().equals(pk.getDni()))
| return false;
| if (!getIdPais().equals(pk.getIdPais()))
| return false;
| return true;
| }
| public int hashCode( ) {
| return getDni().hashCode( ) + getIdPais().hashCode();
| }
|
| @Id
| public Long getIdPais() {
| return idPais;
| }
|
| public void setIdPais(Long idPais) {
| this.idPais = idPais;
| }
|
|
| }
|
I've needed to use Transient so the container create SQL sentences without duplicate
columns. However if the relation between (Pais-Persona) is bidirectional Jboss tell me
org.hibernate.AnnotationException: mappedBy reference an unknown property
com.mycompany.theapp.Persona.pais
I think that's because I've used transient in the field pais of the entity
Persona.
Briefly, the main problem is that I can't establish a bidirectional relation between
two entities and the primary keys of one of the two entities is composed by a field which
is a CMR too.
Please, if somebody need more explanations ask me.
Thanks a lot!
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