I think that when you use Persistence.createEntityManagerFactory(), you must
list your entities in the persistence.xml as it's considered to be a Java SE
environment.
thanks,
-marina
Arun Gupta wrote:
> In NB 5.5.1, I created a Persistence Unit for a pre-configured
> jdbc/sample database. Then I created an Entity Class from this PU to
> generate a dynamic page. The page content looks like:
>
> -- cut here --
> EntityManagerFactory emf =
> Persistence.createEntityManagerFactory("jmaki-jpa4PU");
> EntityManager em = emf.createEntityManager();
>
> List<Customer> list = em.createQuery("select c from Customer
> c").getResultList();
> -- cut here --
>
> The persistence.xml looks like:
>
> -- cut here --
> <?xml version="1.0" encoding="UTF-8"?>
> <persistence version="1.0"
> 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/persistence_1_0.xsd">
> <persistence-unit name="jmaki-jpa4PU" transaction-type="RESOURCE_LOCAL">
> <non-jta-data-source>jdbc/sample</non-jta-data-source>
> <properties/>
> </persistence-unit>
> </persistence>
> -- cut here --
>
> And here is the error that I'm getting while accessing this page:
>
> -- cut here --
> Exception [TOPLINK-8034] (Oracle TopLink Essentials - 2.0 (Build b58-rc1
> (08/04/2007))): oracle.toplink.essentials.exceptions.EJBQLException
> Exception Description: Error compiling the query [select c from Customer
> c]. Unknown abstract schema type [Customer].
> -- cut here --
>
> Most of the stuff is generated for me (database, persistence.xml, PU,
> entity class) and I'm still seeing this error. I verified the table
> contains appropriate data.
>
> What can cause this ?
>
> Thanks,
> -Arun