Hibernate version: 2.1

I have a class called ManipulativePropertyRight which has a column called Validator which stores a serializable object of type Validator. I have several subtypes of Validator, e.g. a StringValidator. I am able to persist an instance of ManipulativePropertyRight containing a validator of type StringValidator but when I reload the ManipulativePropertyRight I get the exception below, stating that there is a mismatch between the type stored and the type which the setter method is able to set.

In my hbm.xml I have
<property name="validator" type="dk.rockit.puls.omnipresent.validator.Validator"/>

And my setter method sets values of type dk.rockit.puls.omnipresent.validator.Validator

I have also tried to put the following in hbm.xml
<property name="validator" type="serializable"/>
but the same problem occurs.

If you have any clues I would be greatful.

Thanks.
Randahl




Caused by: net.sf.hibernate.PropertyAccessException: IllegalArgumentException oc
curred while calling setter of dk.rockit.puls.server.entity.security.right.Manip
ulativePropertyRight.validator
at net.sf.hibernate.property.BasicPropertyAccessor$BasicSetter.set(Basic
PropertyAccessor.java:68)
at net.sf.hibernate.persister.AbstractEntityPersister.setPropertyValues(
AbstractEntityPersister.java:221)
at net.sf.hibernate.impl.SessionImpl.initializeEntity(SessionImpl.java:2
206)
at net.sf.hibernate.loader.Loader.doQuery(Loader.java:240)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections
(Loader.java:133)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:915)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:890)
at net.sf.hibernate.loader.CollectionLoader.initialize(CollectionLoader.
java:83)
at net.sf.hibernate.collection.AbstractCollectionPersister.initialize(Ab
stractCollectionPersister.java:284)
at net.sf.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.ja
va:3264)
at net.sf.hibernate.collection.PersistentCollection.forceInitialization(
PersistentCollection.java:336)
at net.sf.hibernate.impl.SessionImpl.initializeNonLazyCollections(Sessio
nImpl.java:3119)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections
(Loader.java:138)
at net.sf.hibernate.loader.Loader.doList(Loader.java:955)
at net.sf.hibernate.loader.Loader.list(Loader.java:946)
at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:846)
at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1543)
at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1520)
at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1516)
at dk.rockit.puls.server.value.terminal.ValueTerminal.getRole(ValueTermi
nal.java:92)
at dk.rockit.puls.server.value.terminal.ValueTerminal.query(ValueTermina
l.java:251)
at dk.rockit.puls.server.service.value.ValueServiceBean.query(ValueServi
ceBean.java:61)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(S
tatelessSessionContainer.java:683)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invo
ke(CachedConnectionInterceptor.java:185)
at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(Stat
elessSessionInstanceInterceptor.java:72)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInte
rceptor.java:84)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxIntercep
torCMT.java:315)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:1
48)
at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.
java:120)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:191)
at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFacto
ryFinderInterceptor.java:122)
at org.jboss.ejb.StatelessSessionContainer.internalInvoke(StatelessSessi
onContainer.java:331)
at org.jboss.ejb.Container.invoke(Container.java:723)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.
java:60)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.
java:185)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:
360)
at sun.reflect.GeneratedMethodAccessor76.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:294)
at sun.rmi.transport.Transport$1.run(Transport.java:153)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:4
60)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport
.java:701)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.IllegalArgumentException: argument type mismatch
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

I have tried retrieving the serializable property using a DBM tool and from the output I can see, that the stored value is a serialized instance of the correct class.