I would like to use external .hbm.xml mapping files with the Java persistence API EntityManager class. (I am trying to use Hibernate with Java source generated by an IDE which currently does not provide a mechanism for user-specified annotations.) I read through the sample chapter of 'Java Persistence' which shows converting the version of the HelloWorld example from using .hbm.xml mappings to using annotations but still using the Hibernate native API. The chapter mentions using .hbm.xml files with the Java persistence API, i.e EntityManager, but I have not been able to find any examples in the hibernate sample directories of this.

I tried to modify a working example to change from org.hibernate.Session to to use javax.persistence.EntityManager but keep my .hbm.xml mappings. I am getting a runtime error of 'Unknown entity'. I added a 'getMappings' method like in the EntityManger examples I have seen. Any suggestions or pointers to example code which uses EntityManager + .hbm.xml mappings ?

Thanks.

Marc

Can you show your persistence.xml, this is where the hbm file should be listed (using mapping-file)

This is my persistence.xml file:

<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/ ... ce_1_0.xsd"
version="1.0">

<persistence-unit name="shopvisit">
<properties>
<property name="hibernate.ejb.cfgfile" value="/hibernate.cfg.xml" />
</properties>
</persistence-unit>
</persistence>

This is the relevant portfion of my hibernate.cfg.xml:

<mapping resource="shopvisit/PortfolioActiveObject.hbm.xml"/>
<mapping resource="shopvisit/Run.hbm.xml"/>
<mapping resource="shopvisit/RunBatch.hbm.xml"/>
<mapping resource="shopvisit/BatchRunMapping.hbm.xml"/>

</session-factory>

</hibernate-configuration>

This is the error I am getting:
[java] Exception in thread "main" java.lang.IllegalArgumentException: Unknown entity: shopvisit.PortfolioActiveObject
[java] at org.hibernate.ejb.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:185)
[java] at shopvisit.PortfolioManagerNew.getRunBatch(Unknown Source)
[java] at shopvisit.PortfolioManagerNew.main(Unknown Source)
[java] Caused by: org.hibernate.MappingException: Unknown entity: shopvisit.PortfolioActiveObject
[java] at org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:548)
[java] at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:68)
[java] at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:878)
[java] at org.hibernate.impl.SessionImpl.get(SessionImpl.java:815)
[java] at org.hibernate.impl.SessionImpl.get(SessionImpl.java:808)
[java] at org.hibernate.ejb.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:174)

I have an example working with Hibernate native API + .hbm.xml files using
the same hibernate.cfg.xml file.

Thanks.

I can't really see how this is happening, can you create a test case and post it to JIRA (also attach the logs please)