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In my case, our entities are J2SE proxies and their entity names are determined at runtime using an Hibernate session interceptor (#getEntityName(...)).
When enabling Hibernate DEBUG statements, AnyType fails to determine the correct entityname of the runtime instance because it simply bypasses the session interceptor :
return value == null
? "null"
: factory.getTypeHelper()
.entity(HibernateProxyHelper.getClassWithoutInitializingProxy(value))
.toLoggableString( value, factory );
The following error occurs :
org.hibernate.MappingException: Unknown entity: com.sun.proxy.$Proxy22
at org.hibernate.internal.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:1141)
at org.hibernate.type.EntityType.toLoggableString(EntityType.java:553)
at org.hibernate.type.AnyType.toLoggableString(AnyType.java:201)
at org.hibernate.internal.util.EntityPrinter.toString(EntityPrinter.java:79)
at org.hibernate.internal.util.EntityPrinter.toString(EntityPrinter.java:121)
at org.hibernate.event.internal.AbstractFlushingEventListener.logFlushResults(AbstractFlushingEventListener.java:132)
at org.hibernate.event.internal.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:108)
at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:51)
at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1234)
at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:404)
at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit(JdbcTransaction.java:101)
at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:175)
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