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
