Hi,

I was trying to write an import logic that uses JAXB to transform a xml document into a value object. The value object on its part will be mapped to a persistable object.

So far so good the initial import works fine but if I try to add an item to a persistable object's collection I get the following exception. As much debugging as tweaking the source code didn't work for me.

Thank You!

Hibernate version: 3.2.5.ga

Full stack trace of any exception that occurs:
13:51:17,722 ERROR [DataLoader] Import was unsuccessful caused by: null
java.lang.NullPointerException
at org.hibernate.type.IntegerType.next(IntegerType.java:59)
at org.hibernate.engine.Versioning.increment(Versioning.java:108)
at org.hibernate.event.def.DefaultFlushEntityEventListener.getNextVersion(DefaultFlushEntityEventListener.java:365)
at org.hibernate.event.def.DefaultFlushEntityEventListener.scheduleUpdate(DefaultFlushEntityEventListener.java:257)
at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:128)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:196)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:76)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
at org.springframework.orm.hibernate3.SpringSessionSynchronization.beforeCommit(SpringSessionSynchronization.java:126)
at org.springframework.transaction.support.TransactionSynchronizationUtils.triggerBeforeCommit(TransactionSynchronizationUtils.java:48)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.triggerBeforeCommit(AbstractPlatformTransactionManager.java:835)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:645)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:632)
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:314)

The solution for my issue was a not-null property wasn't set. Unfortunatelly the application swallowed the real exception :(

Sorry