[hibernate-dev] @StaticMetamodel binding

[Steve Ebersole]

Little more info.  The generated property is coming from 
BinderHelper.createSyntheticPropertyReference as called from 
org.hibernate.cfg.ToOneFkSecondPass#doSecondPass

The mappings in question here are:

public class Company {
     @Id
     @Column(name = "entity_id")
     @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = 
"SEQ_STORE")
     private Long id = null;

     @Column(name = "id", nullable = false, unique = true, updatable = 
false)
     private Long companyId = null;

     ...
}

public class Person {
     ...
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "relation_id", referencedColumnName = "id")
     private Company company = null;
}

The binder code is creating a synthetic component property on Company 
presumably (?) to act as the FK target for this ManyToOne.  Is that the 
correct reading of what is going on?  I have no clue what is a valid use 
case for doing this so I am largely making an educated guess at what is 
going on here.

Lets assume that this "synthetic property is needed"...  In that case 
I'd then say that it seems to me we need to create it in such a manner 
that it is distinguishable from a "real" property so that it can later 
be excluded during the @StaticMetamodel binding process (very much like 
we do already for back-refs).

To that end I committed a change that resolved this for the test case 
submitted by Andreas to HHH-4870.  It caused no regressions.

On related topic, anyone have thoughts on good way to test this 
@StaticMetamodel binding code?


On 03/29/2010 12:28 PM, Steve Ebersole wrote:
> In regards to
> http://opensource.atlassian.com/projects/hibernate/browse/HHH-4870 I
> have taken a look at the test case. The issue comes from a property that
> annotation-binder is generating that I have no idea why it is.
> Specifically, take a look at the comment:
> http://opensource.atlassian.com/projects/hibernate/browse/HHH-4870?focusedCommentId=35997&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_35997
>
>
> Anyone have any ideas?
>
>

-- 
steve at hibernate.org
http://hibernate.org