ReflectingPersistenceCapable exception in JPA

Question

I am running a ApacheOpenJPA + HSQL unit test and facing the following exception
Test set: com.att.osd.bcs.domain.TestBcsPortDAO
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 9.859 sec <<< FAILURE!
testCountPortsByStateAndEms(com.att.osd.bcs.domain.TestBcsPortDAO)  Time elapsed: 9.765 sec  <<< ERROR!
<openjpa-1.1.0-r422266:657916 nonfatal general error> org.apache.openjpa.persistence.PersistenceException: org.apache.openjpa.enhance.ReflectingPersistenceCapable cannot be cast to com.att.osd.bcs.domain.ne.BcsNe
     at org.apache.openjpa.kernel.BrokerImpl.attach(BrokerImpl.java:3213)
     at org.apache.openjpa.kernel.DelegatingBroker.attach(DelegatingBroker.java:1158)
     at org.apache.openjpa.persistence.EntityManagerImpl.merge(EntityManagerImpl.java:769)
     at com.att.osd.bcs.domain.ne.BcsNElementDaoBean.updateNE(BcsNElementDaoBean.java:145)
     at com.att.osd.bcs.domain.TestBcsPortDAO.testCountPortsByStateAndEms(TestBcsPortDAO.java:65)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:597)The code I have singled out is as follows
public void updateNE(BcsNe ne) throws DAOException {
          if (neExists(ne.getNe())) {                    
               em.merge(ne);
              else {               
               em.persist(ne);
          if (em.isOpen())
               em.flush();                    
// neExists Method
public BcsNe getNeByNe(String ne) {
          BcsNe bcsNe=em.find(BcsNe.class, ne);          
               return bcsNe;          
     }The relation between BcsNe and BcsPort is one to many with BcsNe as the parent and BcsPort as the child.
Junit invocation is as follows
//@testMethod
     tx.begin();
     for (BcsPort port : bcsPortList) {      // All the ports have the same ne
     neBean.*updateNE*(port.getBcsNe());//Throwing the Exception in question          
   tx.commit();The Junit runs well if the ne values are different,
All comments suggestion are welcome..
Thanks
Edited by: RainaV on Aug 30, 2011 2:19 PM

Answer 1

merge can only be called for an entity that comes out of the entity manager. If you jUnit test creates the entity instance without first getting it it from the entity manager, this latter cannot "merge" it, merely "create" it. I'm not talking about whether the entity's data exist in the DB, really about which entity manager you get the entity from.
Edited by: jduprez on Aug 30, 2011 12:30 PM
Crossposted in forum {forum:id=922}: {thread:id=2275897}