I have a class Category, which is subclassed by Item, which in its turn is subclassed by Application and Service. Item has a parentCategory and otherFeature as additional features compared to Category.

CategoryDetails is linked to Category by means of composite key id and version (this composite key is contained in a separate primary-key-class IdVersionPK as described in the manual, which implements the equals and hashcode functions) ParentUniqueId points to the uniqueId in the table Category. (kind of double-up but I am not allowed to change it)

A PropertyAccessException is thrown with reference to IdVersionPK. After debugging, it seems that in the getPropertyValues() method of the PojoComponentTuplizer there is a mix up. This happens at the moment that the object to be retrieved from the query has been created and most attributes already have been assigned their value. However, at the many-to-one relation a ClassCastException occurs. Is this a mapping configuration error on our site, or is it an error in hibernate? Why does Hibernate try to assign the Long value to the IDVersionPK as we defined uniqueId as the property-ref value?


Hibernate version:hibernate 3 rc 1

Mapping documents:
Mapping documents:<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE hibernate-mapping (View Source for full doctype...)>
- <hibernate-mapping default-cascade="none" default-access="property" default-lazy="true" auto-import="true">
- <!-- Category Inheritance Tree-->
- <class name="com.aca.model.Category" table="categories" mutable="true" abstract="false" polymorphism="implicit" dynamic-update="false" dynamic-insert="false" select-before-update="false" optimistic-lock="version">
- <composite-id name="primaryKey" class="com.aca.model.pk.IdVersionPK" unsaved-value="undefined">
<key-property name="id" />
<key-property name="version" />
</composite-id>
<discriminator column="ItemType" type="string" not-null="true" force="false" insert="true" />
- <!-- Properties-->
- <property name="uniqueId" not-null="false" unique="false" update="true" insert="true" optimistic-lock="true" lazy="false">
<column name="uniqueId" not-null="true" />
</property>
<property name="description" not-null="false" unique="false" update="true" insert="true" optimistic-lock="true" lazy="false" />
- <!-- SubClasses -->
- <subclass name="com.aca.model.Item" dynamic-update="false" dynamic-insert="false" select-before-update="false" abstract="false">
- <join table="CategoryDetails" fetch="join" inverse="false" optional="false">
- <key on-delete="noaction">
<column name="id" />
<column name="version" />
</key>
- <!-- We tried with lazy=false,true and fetch=select,join but these changes didn't solve the problem -->
<many-to-one name="parentCategory" property-ref="uniqueId" column="parentUniqueId" lazy="false" not-null="false" unique="false" update="true" insert="true" optimistic-lock="true" /> <property name="otherFeature" column="otherFeature" not-null="false" unique="false" update="true" insert="true" optimistic-lock="true" lazy="false" />
</join>
<subclass name="com.aca.model.Application" discriminator-value="AP" dynamic-update="false" dynamic-insert="false" select-before-update="false" abstract="false" />
<subclass name="com.aca.model.Service" discriminator-value="SV" dynamic-update="false" dynamic-insert="false" select-before-update="false" abstract="false" />
</subclass>
</class>
- <!-- End of Category Inheritance Tree --> </hibernate-mapping>

Code between sessionFactory.openSession() and session.close():application.getUniqueId()

Full stack trace of any exception that occurs:
Full stack trace of any exception that occurs:[INFO] DefaultLoadEventListener - -Error performing load command <org.hibernate.PropertyAccessException: exception getting property value with CGLIB (set hibernate.cglib.use_reflection_optimizer=false for more info) getter of com.aca.model.pk.IDVersionPK.?>org.hibernate.PropertyAccessException: exception getting property value with CGLIB (set hibernate.cglib.use_reflection_optimizer=false for more info) getter of be.ing.smkb.model.pk.IDVersionPK.?
at org.hibernate.tuple.PojoComponentTuplizer.getPropertyValues(PojoComponentTuplizer.java:42)
at org.hibernate.type.ComponentType.getPropertyValues(ComponentType.java:257)
at org.hibernate.type.ComponentType.getHashCode(ComponentType.java:158)
at org.hibernate.engine.EntityKey.getHashCode(EntityKey.java:68)
at org.hibernate.engine.EntityKey.<init>(EntityKey.java:41)
at org.hibernate.type.ManyToOneType.scheduleBatchLoad(ManyToOneType.java:85)
at org.hibernate.type.ManyToOneType.hydrate(ManyToOneType.java:66)
at org.hibernate.persister.entity.BasicEntityPersister.hydrate(BasicEntityPersister.java:1663)
at org.hibernate.loader.Loader.loadFromResultSet(Loader.java:877)
at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:833)
at org.hibernate.loader.Loader.getRow(Loader.java:746)
at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:290)
at org.hibernate.loader.Loader.doQuery(Loader.java:384)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:203)
at org.hibernate.loader.Loader.loadEntity(Loader.java:1255)
at org.hibernate.loader.entity.EntityLoader.load(EntityLoader.java:139)
at org.hibernate.loader.entity.EntityLoader.load(EntityLoader.java:124)
at org.hibernate.persister.entity.BasicEntityPersister.load(BasicEntityPersister.java:2453)
at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:387)
at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:368)
at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:166)
at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:140)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:119)
at org.hibernate.impl.SessionImpl.immediateLoad(SessionImpl.java:571)
at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:59)
at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:80)
at org.hibernate.proxy.CGLIBLazyInitializer.intercept(CGLIBLazyInitializer.java:133)
at com.aca.model.ConfigurationItem$$EnhancerByCGLIB$$e02ebb9e.getUniqueId(<generated>)
at com.aca.test.ConfigurationItemTest.testFindCIByUniqueId(ConfigurationItemTest.java:313)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:41)
at java.lang.reflect.Method.invoke(Method.java:386)
at junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:392)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:276)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:167)

Caused by: java.lang.ClassCastException: java.lang.Long
at be.ing.smkb.model.pk.IDVersionPK$$BulkBeanByCGLIB$$43f49ae7.getPropertyValues(<generated>)
at net.sf.cglib.beans.BulkBean.getPropertyValues(BulkBean.java:48)
at org.hibernate.tuple.PojoComponentTuplizer.getPropertyValues(PojoComponentTuplizer.java:39)
... 43 more

Name and version of the database you are using:Oracle 9.0.2