I guess we just don't support it in JPA, then. It might be a good
future enhancement, though, and probably not that difficult to
implement (since it is already supported in a derivative product of
OpenJPA).
On Jul 9, 2007, at 10:32 AM, David Ezzio (asmtp) wrote:
Hi Marc,
I took your suggestion and got an error when using the interface
whether for a select or delete query. The error is "No metadata
was found for type "interface problem.model.IData". The class is
not enhanced."
I did include the interface in the list of classes in
persistence.xml without any complain during enhancement or mapping-
validation. The mappingtool creates two tables, one for SensorData
and one for PublicData.
I've attached a zip of the text file with the testing code and
stack trace.
Any insights welcomed.
Thanks,
David
Marc Prud'hommeaux wrote:
David-
According to the spec, "interfaces should not be designated as
entities", and if you can't declare it as an entity, then you
don't have anywhere to specify its interface name.
The Kodo JDO layer on top of OpenJPA does support querying on
interfaces, though. I wonder if it would work if you did "select i
from com.somepackage.IData i". If that raises an error, can you
post the stack trace?
On Jun 22, 2007, at 7:08 PM, David Ezzio wrote:
Hi everyone,
I've recently run into a bug in Kodo JDO that appears to be
occurring in
OpenJPA. I have a test case that fails in Kodo JDO, but I'm
stumped how
to port the test case to OpenJPA.
My test case has two data classes and one interface that each class
implements. SensorData and PublicData are the data classes and
IData is
the interface. The interface and classes are very simple.
What I need to do is query on the interface, and I don't know how
to do
it. I don't know how to annotate the interface or whether I
should. I
don't know how to write the query. A simple, "select i from
IData i"
would be just fine if it worked.
Any suggestions?
Thanks,
David Ezzio
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<OpenJPAInterfaceBugOutput.zip>
