Here is a JBoss example:
http://labs.jboss.com/jbossejb3/docs/tutorial/singleinheritance/single.html
The only difference between this example and mine is my discriminator column is
INTEGER. If I use the approach and annotations from example I get:
javax.persistence.PersistenceException: org.hibernate.MappingException:
Repeated column in mapping for entity: com.shockwatch.dbfacade.SWUnit column:
hwModel (should be mapped with insert="false" update="false")
at
org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:698)
at
org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:127)
at
org.jboss.ejb3.entity.PersistenceUnitDeployment.start(PersistenceUnitDeployment.java:264)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at
org.jboss.ejb3.ServiceDelegateWrapper.startService(ServiceDelegateWrapper.java:102)
at
org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
at
org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
at
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at
org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
at $Proxy0.start(Unknown Source)
Caused by: org.hibernate.MappingException: Repeated column in mapping for
entity: com.shockwatch.dbfacade.SWUnit column: hwModel (should be mapped with
insert="false" update="false")
at
org.hibernate.mapping.PersistentClass.checkColumnDuplication(PersistentClass.java:652)
at
org.hibernate.mapping.PersistentClass.checkPropertyColumnDuplication(PersistentClass.java:674)
at
org.hibernate.mapping.PersistentClass.checkColumnDuplication(PersistentClass.java:696)
at
org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:450)
at
org.hibernate.mapping.SingleTableSubclass.validate(SingleTableSubclass.java:43)
at org.hibernate.cfg.Configuration.validate(Configuration.java:1102)
at
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1287)
at
org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:691)
And: If I change to insertable=false, updatable=false as the error suggests I
cannot insert new rows!
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