Single Table Strategy Inheritance Question

drew_k · **Posted:** Tue May 13, 2008 6:00 pm

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Hibernate version:
3.2

Mapping documents:
JPA Annotations

Code between sessionFactory.openSession() and session.close():
N/A

Full stack trace of any exception that occurs:
N/A

Name and version of the database you are using:
MySQL 5.0

The generated SQL (show_sql=true):
N/A

Debug level Hibernate log excerpt:
N/A

Problems with Session and transaction handling?
No

Read this: http://hibernate.org/42.html

Assuming the following classes, how can I convert a persisted BasicUser to an AdminUser?

Code:

@Entity
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@Table(name = "user")
@DiscriminatorColumn(name = "type", discriminatorType = DiscriminatorType.INTEGER)
public class User {
   //some mapped fields
}

Code:

@Entity
@DiscriminatorValue("1")
public class BasicUser extends User {
   //some mapped fields
}

Code:

@Entity
@DiscriminatorValue("2")
public class AdminUser extends User {
   //some mapped fields
}