[hibernate-dev] "derived identifier" mapping
What's the rational for supporting the following?
@Entity
class Product {
...
}
@Entity
class Order {
...
}
@Entity
@IdClass(...)
class OrderLine {
@Id
private Order order;
@Id
private Product product;
}
Specifically, the declaration of the OrderLine primary key. Why would
these not have to be `@Id @ManyToOne`?