[hibernate-dev] "derived identifier" mapping

[Emmanuel Bernard]

This code is 8 years old so no I did not remember.
I did some archeology. The Git migration slots all of that history so I
had to fire up svn.

svn checkout https://svn.jboss.org/repos/hibernate/annotations/branches/v3_4_0_GA_CP/
svn annotate src/test/java/org/hibernate/test/annotations/cid/OrderLinePk.java
svn log -r 11058 src/test/java/org/hibernate/test/annotations/cid/OrderLinePk.java
svn log | grep -C 3 ANN-492

Anyways, it is related to the following:

https://hibernate.atlassian.net/browse/HHH-4259
https://hibernate.atlassian.net/browse/ANN-492
https://forum.hibernate.org/viewtopic.php?t=967202&start=0&postdays=0&postorder=asc&highlight=

It looks like a combination of the following:

- the old code was not able to get the annotation metadata from the
  entity. It was getting the metadata from the id class. Against the
  spec but it was a tough bug to fix
- Goeffrey had a problem and contributed the test
- the test passed a future version of annotations when I applied it
- I left it here as coverage

On Thu 2014-03-27 11:59, Hardy Ferentschik wrote:
> No idea. I think Emmanuel had a better understanding of the derived identifier logic. 
> 
> 
> 
> On 27 Jan 2014, at 06:26, Steve Ebersole <steve at hibernate.org> wrote:
> 
> > 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`?
> > _______________________________________________
> > hibernate-dev mailing list
> > hibernate-dev at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/hibernate-dev
> 
> 
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