I have a legacy table that resembles table-per-hierarchy. I can map different subclasses to that table using @Inheritance(strategy = InheritanceType.SINGLE_TABLE) and @DiscriminatorColumn.

However I want to map one-to-many association to this table but only return a list of a specific class.

Is this possible?

Below is an example of what I'm trying to do. Unfortunately, the database schema is production schema, so I don't have much control in changing it, but I want to leverage object-oriented domain model as much as possible.

Thanks for any help.

=========================
@Entity
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name = "TYPE", discriminatorType = DiscriminatorType.STRING)
@DiscriminatorValue("PET")
public abstract class Pet {
}
=========================
@Entity
@DiscriminatorValue("DOG")
public class Dog extends Pet {
}
=========================
@Entity
@DiscriminatorValue("CAT")
public class Cat extends Pet {
}
=========================
@Entity
public class PetOwner {
private List<Dog> dogs;
private List<Cat> cats;

@OneToMany
public List<Dog> getDogs() {
}

@OneToMany
public List<Cat> getCats() {
}
}
=========================

We have similar needs.
So far we are going to have protected collection Pets which is then used as a source for poulating transient collections Dogs and Cats.

May be there is a better, more 'hibernated' solution.

I think, if you declare List of Dog/Cat in petowner class. Of course corresponding entry in hbm file as well. Make sure lazy-init is set to false. Let me know if that fixes things.