Entity extends abstract class

[anb1]

Hello everyone,

Maybe this is a Hibernate question but I'm trying my luck here anyway :)

We are designing an entity that we want to subclass from an abstract class:

PhoneContact and EmailContact which extends Abstract Contact.

Now, I'm not sure how this must be done. Should the @Entity annotation be on the subclasses, on the mother or on both ? And why ?

Thanks in advance

[shane.bryzak]

You only need the @Entity annotation on the sub classes (the abstract superclass itself is not an entity).

[mokua]

@MappedSuperclass
public abstract class ModelBase {
     @Id
     @GeneratedValue(generator = "tigerSequenceGenerator")
     @Column(name = "ID")
     
     protected Long id;

     @Version
     @Column(name = "OBJ_VERSION")
     private Integer version;
        
        //more attributes
        //getters and setters
} 


@Entity
@Table(name = "blah")
@AttributeOverrides( {
//overrides base class
})
public class SomeEntity extends ModelBase implements Serializable {
     //more attributes..
}