Hi All,

when I am trying to persist a POJO object, it is throwing exception "null". what does it mean? how do we resolve this?
I checked the status of object....it is not NULL!!!!.
when execute the statement session.save(obj); it is failing....

the flow is clike this :

1. objC aggregates to make objB
2. objB aggregates to make objA

I can able save objA and objB successfully, but when I try to save objC, it fails.....I don't understand why the error "null" is coming. If there is any error with mapping, we will get mapping errors but not "null" error.

Plz try to answer this.

Thanks in advance

--Venkat[/img]

please post debug log + stacktrace + code

Error message: null
java.lang.NullPointerException
at com.microsoft.jdbc.sqlserver.tds.TDSRPCParameter.initializeUserParam(Unknown Source)
at com.microsoft.jdbc.sqlserver.SQLServerImplStatement.addUserParametersToRPC(Unknown Source)
at com.microsoft.jdbc.sqlserver.SQLServerImplStatement.execute(Unknown Source)
at com.microsoft.jdbc.base.BaseStatement.commonExecute(Unknown Source)
at com.microsoft.jdbc.base.BaseStatement.executeInternal(Unknown Source)
at com.microsoft.jdbc.base.BasePreparedStatement.execute(Unknown Source)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:1953)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2405)
at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:37)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:243)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:269)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:167)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:101)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:186)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:175)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:557)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:545)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:541)
at com.ge.med.gemsit.cis.perinatal.DPS.persistance.WaveData.DAO.FetalStripDAO.storeFetalWaveData(FetalStripDAO.java:314)
at com.ge.med.gemsit.cis.perinatal.DPS.persistance.WaveData.DAO.Test.main(Test.java:15)

-----------------------------------------------------------------------------------
int storefetalWaveStatus=0;
Session session = null;
try
{
SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
session = sessionFactory.openSession();
Patient objPatient = (Patient) session.load(Patient.class, new Integer(patientId));
FetalStrip objFetalStrip = new FetalStrip();
objFetalStrip.setStartTime(startTime);
objFetalStrip.setFsPatient(objPatient);
org.hibernate.Transaction tranact = session.beginTransaction();
session.save(objFetalStrip);

FSWaveform objWaveform = new FSWaveform();
objWaveform.setFetalStrip(objFetalStrip);
objWaveform.setWaveform_Name("FHR1");
tranact = session.beginTransaction();
session.save(objWaveform);
FSWaveformSegment objSegment = new FSWaveformSegment();
objSegment.setStartTime(startTime);
objSegment.setWaveform(objWaveform);
objSegment.setWaveformName("FHR1");
objSegment.setPatientID(objPatient);
session.save(objSegment);
tranact.commit();
session.flush();
session.close();

}catch(Exception e){
System.out.println("Error message: " + e.getMessage());
e.printStackTrace();

}

return storefetalWaveStatus;
}