I integrated the OpenEBJ2 conversion code which adds all table,
column and foreign key declarations to the cmp mappings. Currently,
if we see that the cmp used a key generator, we always set the bean
to use IDENTITY pk generation, but we should be able to map all key
generator types.
Remember, complex primary keys and unknown primary keys don't work.
-dain
On Jan 31, 2007, at 3:31 PM, Dain Sundstrom wrote:
I have integrated the code that converts the ejb-jar.xml CMP
declarations to a JPA entity mappings file. In addition, I added
support for converting the OpenEJB2 CMP mappings (TranQL) mappings
to JPA. There is a fairly extensive test suite that converts the
OpenEJB2 itests, Geronimo Daytrader, and the huge CMR mappings that
Gianny wrote for OpenEJB2. The imput -ejb-jar.xml and -openejb-
jar.xml and the output -orm.xml files can be found here:
https://svn.apache.org/repos/asf/incubator/openejb/trunk/openejb3/
container/openejb-core/src/test/resources/convert/oej2/cmp/
In addition, the iTests no longer contain explicit mappings for
basic CMP beans, and instead rely on the conversion code to
generate the mappings.
The integration is fairly simple. We hook the converter in the
ConfigurationFactory, where it reads the JAXB tree for the CMP
beans and generates a JPA entity mappings JAXB tree. We then store
that xml in the info tree, so later is can be written in the -
cmp.jar file we generate for each application (the jar that
contains the generated CMP2 implementation classes).
The auto generation only kicks in if the bean does not have an
explicit persistence-context-ref declared for cmp. For example,
adding the following to a cmp declaration in an ejb-jar.xml file
would DISABLE auto conversion:
<persistence-context-ref>
<persistence-context-ref-name>openejb/cmp</persistence-
context-ref-name>
<persistence-unit-name>cmp</persistence-unit-name>
</persistence-context-ref>
If we, do not find a persistence-context-ref for "openejb/cmp", we
assume the bean does not need an auto generated mapping. I don't
really like this convention for turning on and off the auto
generation, but it was the simplest thing I could think of.
I believe all mappings are supported with the exception of complex
primary keys and unknown primary keys, neither of which are
currently supported.
As always, if you have problems, let me know.
-dain
