Hello, all!

I'm using Glassfish 3.0.1 and Hibernate 3.5.0-0.3 (installed via glassfish module installer) with Sun JVM 1.6.0-22. I have the following class layout on JPA, all using annotations, and using field-based access on JPA.

@Entity
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name = "...")
public abstract class Parent {
@ManyToOne
@JoinColumns(.....)
private OtherClass other;

...
}

@Entity
@DiscriminatorValue(...)
public class BigChild extends Parent {
...
}

@Entity
@DiscriminatorValue(...)
public class SmallChild extends Parent {
...
}

@Entity
public class OtherClass {
@OneToMany(mappedBy = "other")
private List<BigChild> bigChildren;

@OneToMany(mappedBy = "other")
private List<SmallChild> smallChildren;

....
}

However, when deploying the app Hibernate complains that the mappedBy annotation is not valid (i.e. there is no association named "other" in class BigChild, I suspect the same for SmallChild would be true), and obviously deployment fails. Thus, it appears that hibernate is not checking for the validity of inherited associations.

This very same code works and is in production using EclipseLink. The reason we'd like to support hibernate as well is so we can deploy on JBoss6 (when it goes non-beta), without having to pull any additional libraries with us.

I realize that this may be a tall(ish) order - but we'd like to try to achieve fully portable JPA inasmuch as possible or at least as close to it as possible with the necessary differences clearly documented.

Any ideas?

The exact error message is:

SEVERE: Exception while preparing the app
org.hibernate.AnnotationException: mappedBy reference an unknown target entity property: BigChild.other in OtherClass.bigChildren
at org.hibernate.cfg.annotations.CollectionBinder.bindStarToManySecondPass(CollectionBinder.java:655)
at org.hibernate.cfg.annotations.CollectionBinder$1.secondPass(CollectionBinder.java:619)
at org.hibernate.cfg.CollectionSecondPass.doSecondPass(CollectionSecondPass.java:66)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1221)
at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:383)
at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1206)
at org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:1449)
at org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:193)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:1077)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:673)
at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:72)
at org.glassfish.persistence.jpa.PersistenceUnitLoader.loadPU(PersistenceUnitLoader.java:181)
at org.glassfish.persistence.jpa.PersistenceUnitLoader.<init>(PersistenceUnitLoader.java:96)
at org.glassfish.persistence.jpa.JPADeployer.prepare(JPADeployer.java:121)
at com.sun.enterprise.v3.server.ApplicationLifecycle.prepareModule(ApplicationLifecycle.java:644)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:296)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:183)
at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:272)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:305)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:320)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1176)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$900(CommandRunnerImpl.java:83)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1235)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1224)
at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:365)
at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:204)
at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:166)
at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:100)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:245)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
at com.sun.grizzly.ContextTask.run(ContextTask.java:69)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)
at java.lang.Thread.run(Thread.java:662)

You need to add @MappedSuperclass to the Parent class as described by 2.2.4.4 in http://docs.jboss.org/hibernate/stable/ ... ml#d0e1168

Thank you that certainly did the trick with that particular error.

However, I must ask - for my information, mostly: doesn't that violate specs? The requirement of @MappedSuperclass... As per specs, @Entity inheritance should be sufficient...

As per the error, I got a new now - and this one with no indication on a fix:


INFO: Processing PersistenceUnitInfo [
name: CorePersistence
...]
INFO: Binding entity from annotated class: Parent
INFO: Bind entity Parent on table test_table
SEVERE: Exception while invoking class org.glassfish.persistence.jpa.JPADeployer prepare method
java.lang.NullPointerException
at org.hibernate.cfg.ClassPropertyHolder.addPropertyToMappedSuperclass(ClassPropertyHolder.java:133)
at org.hibernate.cfg.ClassPropertyHolder.addPropertyToPersistentClass(ClassPropertyHolder.java:118)
at org.hibernate.cfg.ClassPropertyHolder.addProperty(ClassPropertyHolder.java:98)
at org.hibernate.cfg.ClassPropertyHolder.addProperty(ClassPropertyHolder.java:81)
at org.hibernate.cfg.annotations.PropertyBinder.bind(PropertyBinder.java:246)
at org.hibernate.cfg.annotations.PropertyBinder.makePropertyAndBind(PropertyBinder.java:195)
at org.hibernate.cfg.AnnotationBinder.bindManyToOne(AnnotationBinder.java:2577)
at org.hibernate.cfg.AnnotationBinder.processElementAnnotations(AnnotationBinder.java:1520)
at org.hibernate.cfg.AnnotationBinder.processIdPropertiesIfNotAlready(AnnotationBinder.java:762)
at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:726)
at org.hibernate.cfg.AnnotationConfiguration.processArtifactsOfType(AnnotationConfiguration.java:636)
at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:359)
at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1206)
at org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:1449)
at org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:193)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:1077)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:673)
at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:72)
at org.glassfish.persistence.jpa.PersistenceUnitLoader.loadPU(PersistenceUnitLoader.java:181)
at org.glassfish.persistence.jpa.PersistenceUnitLoader.<init>(PersistenceUnitLoader.java:96)
at org.glassfish.persistence.jpa.JPADeployer.prepare(JPADeployer.java:121)
at com.sun.enterprise.v3.server.ApplicationLifecycle.prepareModule(ApplicationLifecycle.java:644)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:296)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:183)
at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:272)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:305)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:320)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1176)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$900(CommandRunnerImpl.java:83)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1235)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1224)
at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:365)
at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:204)
at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:166)
at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:100)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:245)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
at com.sun.grizzly.ContextTask.run(ContextTask.java:69)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)
at java.lang.Thread.run(Thread.java:662)