Support Enum as Primary Key Type
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Key: OPENJPA-1541
URL: https://issues.apache.org/jira/browse/OPENJPA-1541
Project: OpenJPA
Issue Type: New Feature
Components: 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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