[jboss-user] [EJB 3.0] - EJB3: org.hibernate.type.SerializationException: could not d
Hi everybody,
I would get an Output of an Table Road (Oracle Database) via EntityManager and Web
Services. I got the following error :
org.hibernate.type.SerializationException: could not deserialize
Eclipe3.4.1/Glassfish V2.1/SoapUI 2.5 (for testing)
Enviroment:
Class : Location
IATA (PK)
Class : Road
Origin (PK)(FK of IATA)
Destination (PK)(FK of IATA)
To manage the composite ID I generated a class RoadPK which is below:
import java.io.Serializable;
| import javax.persistence.Embeddable;
| @Embeddable
| public class RoadPK implements Serializable {
|
| /**
| * Variable of type Location
| */
| private Location origin = null;
|
| private Location destination = null;
| ......(Getter/Setter).....
|
Class Road have the attributs(the composite ID).
I locate the Problem here in the @nameQuery. I can show all availability methods when I
write SELECT r.availabilityMethod FROM ROADS r.
But I can't access origin and destination by SELECT r.origin.iata FROM ROADS r . So my
Question is:
Is my mapping wrong or is there no posssibility to work with Type classes for attributes
in composite IDs in EJB3?
@Entity
| @NamedQuery(
| name = "ROADS.listAll",
| query = "SELECT r FROM ROADS r")/*
|
| @Table(name="ROADS")
| public class ROADS implements Serializable {
|
| private RoadPK roadPK = null;
| private String availabilityMethod = null;
|
| @EmbeddedId
| public RoadPK getRoadPK() {
| return roadPK ;
| }
|
| public void setRoadPK(RoadPK roadPK ) {
| this.roadPK = roadPK ;
| }
| @Column(name="AVAILABILITY_METHOD")
| public String getAvailabilityMethod() {
| return availabilityMethod;
| }
|
|
| public void setAvailabilityMethod(final String availabilityMethodParam) {
| this.availabilityMethod = availabilityMethodParam;
| }
|
|
| }
Class Location:
@Entity
| @Table(name = "LOCATIONS")
| public class Location implements Serializable {
|
| private String iata = null;
|
| /**
| * The Roads
| */
| private Set<Road> roadsorigin;
|
| private Set<Road> roadsdestination;
|
| @Id
| @Column(name = "IATA")
| public String getIata() {
| return iata;
| }
| //...................
| @OneToMany(mappedBy = "roadPK.origin", fetch = FetchType.EAGER, cascade
= CascadeType.ALL)
| public Set<Road> getRoadsorigin() {
| return roadsorigin;
| }
|
| public void setRoadsorigin(Set<ROAD> roadsorigin) {
| this.roadsorigin= roadsorigin;
| }
|
| @OneToMany(mappedBy = "roadPK.destination", fetch = FetchType.EAGER,
cascade = CascadeType.ALL)
| public Set<Road> getRoadsdestination() {
| return roadsdestination;
| }
|
| public void setRoadsdestination(Set<Road> roadsdestination) {
| this.roadsdestination = roadsdestination;
| }
| }
The class RoadDAO offers the WebServices:
@WebService
| @Stateless(name="RoadDAO")
| public class RoadDAOimplements Serializable {
|
| @PersistenceContext(name="ResourceDS")
| private EntityManager em;
| // ....
| @SuppressWarnings("unchecked")
| @WebMethod
| @WebResult(name="RoadsList")
| public final List < Road> listRoad() {
| return em.createNamedQuery("Road.listAll").getResultList();
| }
| // ....
| }
Thanks for reading
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