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https://issues.apache.org/jira/browse/OPENJPA-1541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12912876#action_12912876
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Marc Logemann commented on OPENJPA-1541:
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Is this documented somwhere in the JPA docs that the enum ID feature is gone. I
ve read a document where all the "changes" (from 1.x to 2.x) are documented but
i cant remember reading something about Enums.
> Support Enum as Primary Key Type
> --------------------------------
>
> Key: OPENJPA-1541
> URL: https://issues.apache.org/jira/browse/OPENJPA-1541
> Project: OpenJPA
> Issue Type: New Feature
> Components: competitive, jpa
> Affects Versions: 2.0.0-beta
> Environment: All
> Reporter: bernard
> Priority: Critical
>
> Enums work as primary keys in TopLink and EclipseLink. DataNucleus supports
> them, too:
> http://www.datanucleus.org/products/accessplatform/jpa/primary_key.html
> It would be good to also include this in the specification because, not to
> support type safety in primary keys is fairly sad.
> Enum is a basic language feature, and most applications would enjoy
> significant benefits by mapping the keys of those little system behavior
> controlling lookup tables to enums.
> Consider a payment_type table. One can only generate the IDs of the table and
> use them for switching safely when the ids are mapped to enums. Any such
> application would typically have a PaymentType enum anyway.
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