Hi,

I have the 'Customer' entity in my application that's a subclass the 'Person' entity (using the Joined strategy). I have one instance of 'Person', and i would like to append only the data from the 'Customer', without changing the id of 'Person'. It's like 'transforming' one Person to a Customer.

I have the person data in the table like this:

PERSON
--------------------------
|PERSON_ID | NAME |
--------------------------
|1 | John |
--------------------------

And i would like only to append the Customer data, inserting the following row:

CUSTOMER
-------------------------------
|CUST_ID | CUST_RANK |
-------------------------------
|1 | A |
-------------------------------

Is there a way of doing such thing???

The mapping's for the entities are:

@Entity
@Inheritance(strategy=InheritanceType.JOINED)
public class Person {

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name="PERSON_ID")
private Integer id;

private String name;

//getter's and setter's ommited

}


@Entity
@PrimaryKeyJoinColumn(name="CUST_ID")
public class Customer extends Person {

@Column(name="CUST_RANK")
private String rank;

//getter's and setter's ommited
}

Thanks a lot,
Elton.

I don't think you can change the class of an object like this.
It probably works if you do it directly in the database (without JPA or Hibernate)

Hi Edwin,
Thanks for your reply....
That was the solution i was thinking about.... i was just wondering if there's a more elegant solution.