[hibernate-issues] [Hibernate-JIRA] Updated: (HHH-5280) Exception on unidirectional collection whose elements are owned by several collection: "java.lang.IllegalArgumentException: object is not an instance of declaring class"

[Emmanuel Bernard (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-5280?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Emmanuel Bernard updated HHH-5280:
----------------------------------

         Assignee: Emmanuel Bernard
    Fix Version/s: 3.6.1
          Summary: Exception on unidirectional collection whose elements are owned by several collection: "java.lang.IllegalArgumentException: object is not an instance of declaring class"  (was: "java.lang.IllegalArgumentException: object is not an instance of declaring class" when persisting a object graph containing the same transient objetc twice.)

Thanks for all the feedback, I've compiled both tests and patches to fix the issue. It's on github on both master and 3.6

> Exception on unidirectional collection whose elements are owned by several collection: "java.lang.IllegalArgumentException: object is not an instance of declaring class"
> -------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HHH-5280
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5280
>             Project: Hibernate Core
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 3.5.2, 3.6.0
>         Environment: Hibernate 3.5.2
> Db: All? (At least h2 and mysql)
>            Reporter: Benjamin Lerman
>            Assignee: Emmanuel Bernard
>            Priority: Critical
>             Fix For: 3.6.1
>
>         Attachments: hibernate-multi-parent.tgz, patch.txt, projectHbBugParentId.zip, test.entity.TestCreate.txt
>
>
>  I attach a maven project showing the bug.
>  I have 3 classes, A, B, C with
>  C have a one-to-many unidirectional relation to B and A.
>  B have a one-to-many unidirectional relation to A.
>  Those relations are mapped by foreign keys.
>  The cascading properties for those relations are all save-update,persist
>  For each of those relations, the inverse cardinality is 1 (which means A must be associated with a B and a C, and B must be associated with a C).
>  I create an instance of C that I associate to an instance of B and an instance of A, and I associate the instance of B with the instance of A.
>  I then try to save C, and I get the attached exception.
>  For what I understood the problem is with the method StatefulPersistenceContext.getOwnerId: this method use a cache to retrieve the parent of the instance of A, but because A has 2 different parents (the instance of B and the instance of C), it does not retrieve the right one and try to call a method on the wrong entity.
>  

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