EJB 3.0 Inheritance problem

Question

I have to persist classes Cat, BullDog and StBernard:
class Animal {
private int animalId;
private String name;
private String dtype;
class Dog extends Animal {
private int dogId;
private String furColor;
class BullDog extends Dog {
private int bullDogId;
private int fightCount;
class StBernard extends Dog {
private int stbernardId;
private int livesSaved;
class Cat extends Animal {
private int catId;
private String preferredCatFood;
}Planned inheritance strategy is joined table strategy. There is no problem mapping and persisting Cat and Dog tables into database, but I cannot find a way how to annotate StBernard and BullDog classes to persist them. Is it possible at all?

Answer 1

do you know any official doc or reference where I can find statement, that such inheritance is not possible? i.e. only one level inheritance is allowed in JPA? Will check @SecondaryTable to see if it is helpful or not.
@SecondaryTable This annotation is used to specify a secondary table for the annotated entity class. Specifying one or more secondary tables indicates that the data for the entity class is stored across multiple tables.@SecondaryTable is not for me :(
Edited by: marekst on Feb 7, 2008 6:36 AM