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https://issues.apache.org/jira/browse/OPENJPA-2325?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pinaki Poddar resolved OPENJPA-2325.
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Resolution: Fixed
> MappedSuperClass without an @Id causes wrong identity type for the inherited
> types
> ----------------------------------------------------------------------------------
>
> Key: OPENJPA-2325
> URL: https://issues.apache.org/jira/browse/OPENJPA-2325
> Project: OpenJPA
> Issue Type: Bug
> Components: kernel
> Affects Versions: 2.3.0
> Reporter: Pinaki Poddar
> Assignee: Pinaki Poddar
> Fix For: 2.3.0
>
>
> A MappedSuperClass without a declared identity field can cause the derived
> classes that have decalred an @Id field to be wrongly using DATASTORE
> identity type because the identity type of its superclass being UNKNOWN leads
> the derived type to use the default identity type, which for JPA faced is set
> to DATASTORE.
> The suggested change modifies the logic of ClassMetaData while detecting the
> identity type whether it is an abstract (i.e. MappedSuperClass). Also
> introduced a change that distinguishes whether the identity type was ever
> evaluated versus whether identity type is indeterminable (i.e. UNKNOWN)
> which will will save few cycles for this commonly invoked operation.
> Previously for UNKNOWN type was indistinguishable from the case where
> identity type was never evaluated.
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