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tonyXXX
 Post subject: java.lang.NullPointerException one-to-many exception pls hel
PostPosted: Tue Nov 08, 2005 3:29 am 
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Joined: Sun Oct 16, 2005 12:37 pm
Posts: 47
Location: Romania, Galati
I have the following exception when I try to get a Set from one-to-many relation. I have other collection that works well but this set throws this kind of exception when I try to retrieve.


Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at org.hibernate.tuple.AbstractTuplizer.createProxy(AbstractTuplizer.java:249)
at org.hibernate.persister.entity.BasicEntityPersister.createProxy(BasicEntityPersister.java:2813)
at org.hibernate.event.def.DefaultLoadEventListener.createProxyIfNecessary(DefaultLoadEventListener.java:260)
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:205)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:121)
at org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:602)
at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:255)
at org.hibernate.type.EntityType.resolve(EntityType.java:280)
at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:105)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:506)
at org.hibernate.loader.Loader.doQuery(Loader.java:415)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:210)
at org.hibernate.loader.Loader.loadCollection(Loader.java:1396)
at org.hibernate.loader.collection.OneToManyLoader.initialize(OneToManyLoader.java:107)
at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:483)
at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:60)
at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1354)
at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:171)
at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:48)
at org.hibernate.collection.PersistentSet.iterator(PersistentSet.java:134)
at clinica.gestiune.FisaInvEpidRapFrm.before(FisaInvEpidRapFrm.java:445)
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alesj
 Post subject:
PostPosted: Tue Nov 08, 2005 7:10 am 
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Joined: Sat Oct 25, 2003 8:49 am
Posts: 490
Location: Vrhnika, Slovenia
Catch the cause of this exception, since this too litle info.
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tonyXXX
 Post subject:
PostPosted: Tue Nov 08, 2005 7:15 am 
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Joined: Sun Oct 16, 2005 12:37 pm
Posts: 47
Location: Romania, Galati
This is whole stacktrace.

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at org.hibernate.tuple.AbstractTuplizer.createProxy(AbstractTuplizer.java:249)
at org.hibernate.persister.entity.BasicEntityPersister.createProxy(BasicEntityPersister.java:2813)
at org.hibernate.event.def.DefaultLoadEventListener.createProxyIfNecessary(DefaultLoadEventListener.java:260)
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:205)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:121)
at org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:602)
at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:255)
at org.hibernate.type.EntityType.resolve(EntityType.java:280)
at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:105)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:506)
at org.hibernate.loader.Loader.doQuery(Loader.java:415)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:210)
at org.hibernate.loader.Loader.loadCollection(Loader.java:1396)
at org.hibernate.loader.collection.OneToManyLoader.initialize(OneToManyLoader.java:107)
at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:483)
at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:60)
at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1354)
at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:171)
at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:48)
at org.hibernate.collection.PersistentSet.iterator(PersistentSet.java:134)
at clinica.gestiune.FisaInvEpidRapFrm.before(FisaInvEpidRapFrm.java:762)
at clinica.gestiune.FisaInvEpidRapFrm.<init>(FisaInvEpidRapFrm.java:102)
at clinica.MainFrame.actionPerformed(MainFrame.java:1137)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
at javax.swing.AbstractButton.doClick(AbstractButton.java:302)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1000)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1041)
at java.awt.Component.processMouseEvent(Component.java:5488)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3093)
at java.awt.Component.processEvent(Component.java:5253)
at java.awt.Container.processEvent(Container.java:1966)
at java.awt.Component.dispatchEventImpl(Component.java:3955)
at java.awt.Container.dispatchEventImpl(Container.java:2024)
at java.awt.Component.dispatchEvent(Component.java:3803)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
at java.awt.Container.dispatchEventImpl(Container.java:2010)
at java.awt.Window.dispatchEventImpl(Window.java:1766)
at java.awt.Component.dispatchEvent(Component.java:3803)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:234)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
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alesj
 Post subject:
PostPosted: Tue Nov 08, 2005 7:19 am 
Expert
Expert

Joined: Sat Oct 25, 2003 8:49 am
Posts: 490
Location: Vrhnika, Slovenia
Did you try updating H3 to 3.1?

Code:
   public Object createProxy(Serializable id, SessionImplementor session)
   throws HibernateException {
      return getProxyFactory().getProxy( id, session );
   }


This is the code snippet that throws the NPE. But I seriously doubt that there is no proxyFactory.

Try debuging.
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tonyXXX
 Post subject:
PostPosted: Tue Nov 08, 2005 8:38 am 
Beginner
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Joined: Sun Oct 16, 2005 12:37 pm
Posts: 47
Location: Romania, Galati
I use hibernate 3.0.2.
I had a legancy db schema and I used hibernate tool to create configuration file, mapping files and beans. In my schema n-n relation are materialized with tables that has not primary keys composed by the 2 foreign keys. Hibernate tools didn't generate many-to-many relationships... I suppose that this is the source for exception.
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