JPA 2.0 CriteriaQuery problem

Question

Hi all,
I am creating JPA 2.0 web application using Spring 2.5. I have one entity:
package data;
@Entity
public class NewEntity implements Serializable {
}a JPA controller for it
public class NewEntityJpaController {
     public int getNewEntityCount() {
          EntityManager em = getEntityManager();
          try {
               CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
               Root<NewEntity> rt = cq.from(NewEntity.class);
               cq.select(em.getCriteriaBuilder().count(rt));
               Query q = em.createQuery(cq);
               return ((Long) q.getSingleResult()).intValue();
          } finally {
               em.close();
}and a Spring controller:
public class NewAbstractController extends AbstractController {
     jpa.NewEntityJpaController     c     = new jpa.NewEntityJpaController();
    public NewAbstractController() {
    protected ModelAndView handleRequestInternal(
            HttpServletRequest request,
            HttpServletResponse response) throws Exception {
        ModelAndView     mv     = new ModelAndView("/index");
          mv.addObject("data", c.getNewEntityCount());
          return mv;
}But when I access web page, I get the following exception:
java.lang.IllegalArgumentException: The type [null] is not the expected [EntityType] for the key class [class data.NewEntity]Trace:
java.lang.IllegalArgumentException: The type [null] is not the expected [EntityType] for the key class [class data.NewEntity].
        at org.eclipse.persistence.internal.jpa.metamodel.MetamodelImpl.entity(MetamodelImpl.java:152)
        at org.eclipse.persistence.internal.jpa.querydef.AbstractQueryImpl.from(AbstractQueryImpl.java:97)
        at jpa.NewEntityJpaController.getNewEntityCount(NewEntityJpaController.java:131)
        at web.controllers.NewAbstractController.handleRequestInternal(NewAbstractController.java:28)
...

Answer 1

Same problem here. I'm using Oracle as back-end. Same error...
Using the APP schema in java DB works... As I can see the code generated by Netbeans looks the same.
Anyone knows how to fix it? (some linked hashmap problem it seams)
10x
Florin POP