Unwrap EntityManager to Connection
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Key: OPENJPA-1803
URL: https://issues.apache.org/jira/browse/OPENJPA-1803
Project: OpenJPA
Issue Type: Improvement
Components: jpa
Affects Versions: 2.0.1
Reporter: Harald Wellmann
This is currently the recommended way to access the javax.sql.Connection
underlying an EntityManager:
OpenJPAEntityManager oem = OpenJPAPersistence.cast(em);
Connection con = (Connection) oem.getConnection();
It would be more convenient to simply write
Connection con = em.unwrap(Connection.class);
That way, the client needing to access the Connection only depends on the
javax.persistence API and not on org.apache.openjpa.*.
I believe the JPA 2.0 spec neither mandates nor forbids this functionality. It
is supported by Eclipselink 2.x.
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