Dear All. I need a help here. I may be misunderstanding something.
I have 2 classes Employee and ContactInfo. in a bidirectional OneToOne
relation. Being Employee the owner side.
When retrieving an employee the attribute contactInfo is okay, but when I
retreive a particular contactInfo. The attribute employee is null.
Here are the classes:
@Entity
@Table(name = "employee")
public class Employee implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Basic
private String firstName;
@Basic
@OneToOne(cascade = CascadeType.ALL)
private ContactInfo contactInfo;
public Employee() {
super();
this.contactInfo = new ContactInfo();
}
//getters and setters...
@Entity
@Table(name = "contact_info")
public class ContactInfo implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Key key;
private String mobNumber;
@Basic
@OneToOne(mappedBy = "contactInfo")
private Employee employee;
public ContactInfo() {
super();
}
//getters and setters
//Method to retreive contactInfo By Mobile Number
public ContactInfo loadContactInfoByMobNumber(String mobNumber)
throws NullParameterException, GeneralException {
entityManager = EMF.get().createEntityManager();
List<ContactInfo> list;
ArrayList<ContactInfo> contactInfos;
if (mobNumber == null) {
throw new NullParameterException(
"Parameter aniId cant be null in method
loadAnnotationById");
}
try {
String sql = "SELECT ci FROM ContactInfo ci WHERE
ci.mobNumber='"
+ mobNumber + "'";
list = entityManager.createQuery(sql).getResultList();
contactInfos = new ArrayList<ContactInfo>(list);
} catch (Exception e) {
throw new GeneralException(
"Exception in method loadAnnotationById: " +
e.getMessage());
} finally {
if (entityManager.isOpen()) {
entityManager.close();
}
}
return contactInfos.get(0); --------------------------> this
object has an attribute employee in null :('.
}
Thenk you very much in advance.
Regards.
--
Kido.
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