[hibernate-issues] [Hibernate-JIRA] Closed: (HHH-4902) Handle JPA 2 requirement of setting id attribute to non-null with its equivalent of foreign-generator

[Steve Ebersole (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-4902?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Ebersole closed HHH-4902.
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    Resolution: Fixed

> Handle JPA 2 requirement of setting id attribute to non-null with its equivalent of foreign-generator
> -----------------------------------------------------------------------------------------------------
>
>                 Key: HHH-4902
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4902
>             Project: Hibernate Core
>          Issue Type: Bug
>          Components: core
>            Reporter: Steve Ebersole
>            Assignee: Steve Ebersole
>             Fix For: 3.5.0-Next
>
>          Time Spent: 4 hours, 9 minutes
>  Remaining Estimate: 0 minutes
>
> JPA 2 defines an equivalent of the Hibernate foreign generator.  However the spec implies (via a badly worded footnote) that users can manually set a value for that id attribute.  However the spec is very clear that it is the association which drives the persisted id value, not the id attribute.
> So basically, the user can manually set the id value but it is completely expected to be ignored.
> Unfortunately that messes up the Hibernate notion of unsaved-value (how it distinguishes transient entities from detached entities).  So we need to account for this in the persist listeners.

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