Hi guys,
I must be missing something simple to get generics working with openjpa:
this is a very simple example.
@MappedSuperclass
public class Fruit {}
@Entity
public class Apple extends Fruit {}
@Entity
public class Orange extends Fruit {}
@MappedSuperclass
public class Tree<T extends Fruit> {
@ManyToOne (cascade = CascadeType.ALL) // targetEntity ?
@JoinColumn
private T fruit;
//getters setters
}
@Entity
public class AppleTree extends Tree<Apple> {}
@Entity
public class OrangeTree extends Tree<Orange> {}
@Test
Apple fruit = new AppleFruit();
AppleTree tree = new AppleTree();
tree.setFruit(fruit);
//save tree
//after saving we should be able to retrieve AppleTree with Apple fruit
openjpa seems cannot guess targetEntity on @ManyToOne
what is way to get it working?
Out of despair I even tried using @ManyToOne with targetEntity specified on
subclasses (declaring on a method not a field level) does not work either.
(And I don't like this approach).
Help is greatly appreciated.
Agurkas
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