properties element causes exception in interface/abstract class --------------------------------------------------------------- Key: HHH-535 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-535 Project: Hibernate Core Issue Type: Bug Components: core Affects Versions: 3.0.3 Environment: Hibernate version: 3.0.3 Reporter: Jason Boutwell Assignee: Steve Ebersole Fix For: 3.2.0.alpha2, 3.1.3 I am using the <properties> element to map some legacy data. It appears that Hibernate is trying to create a component POJO for the <properties> element with the type of the enclosing class, which is an interface. Is this expected behavior? <hibernate-mapping> <class name="Address" table="ADDRESS" proxy="Address"> <meta attribute="interface" inherit="false">true</meta> <id name="addressId" type="long" column="ADDRESS_ID"/> <discriminator column="ADDRESS_TYPE" type="string" length="30" /> <properties name="uniqueAddress"> <property name="addressType" column="ADDRESS_TYPE" type="string" insert="false" update="false" length="30" /> <many-to-one name="server" column="SERVER_ID" class="Server" not-null="true" /> </properties> <subclass name="AddressImpl" discriminator-value="null" proxy="Address"> </subclass> </class> <class name="Server" table="SERVER" proxy="Server"> <meta attribute="interface" inherit="false">true</meta> <id name="serverId" type="long" column="SERVER_ID"> <discriminator column="SERVER_TYPE" type="string" length="10"/> <property name="serverType" type="string" column="SERVER_TYPE" length="10" update="false" insert="false"/> <subclass name="ServerImpl" discriminator-value="null" proxy="Server"> <many-to-one name="address" class="AddressImpl" property-ref="uniqueAddress" cascade="all-delete-orphan" unique="true" update="false" insert="false"> <column name="ADDRESS_TYPE"/> <column name="SERVER_ID"/> </many-to-one> </subclass> </class> </hibernate-mapping> When I create a new Server and add a ServerAddress, Hibernate throws an Exception during the cascade, It seems to be trying to instantiate the <properties> "component": org.hibernate.InstantiationException: Cannot instantiate abstract class or interface: Address org.springframework.orm.hibernate3.HibernateSystemException: Cannot instantiate abstract class or interface: Address; nested exception is org.hibernate.InstantiationException: Cannot instantiate abstract class or interface: Addressorg.hibernate.InstantiationException: Cannot instantiate abstract class or interface: Address at org.hibernate.tuple.PojoInstantiator.instantiate(PojoInstantiator.java:56) at org.hibernate.tuple.AbstractComponentTuplizer.instantiate(AbstractComponentTuplizer.java:89) at org.hibernate.type.ComponentType.instantiate(ComponentType.java:344) at org.hibernate.type.ComponentType.deepCopy(ComponentType.java:301) at org.hibernate.type.TypeFactory.deepCopy(TypeFactory.java:290) at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:226) at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:159) at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:184) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:173) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:96) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:69) at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:464) at org.hibernate.engine.Cascades$5.cascade(Cascades.java:154) at org.hibernate.engine.Cascades.cascadeAssociation(Cascades.java:771) at org.hibernate.engine.Cascades.cascade(Cascades.java:720) at org.hibernate.engine.Cascades.cascade(Cascades.java:847) at org.hibernate.event.def.AbstractSaveEventListener.cascadeBeforeSave(AbstractSaveEventListener.java:331) at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:213) at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:159) at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:184) at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:173) at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:69) at org.hibernate.impl.SessionImpl.save(SessionImpl.java:477) at org.hibernate.impl.SessionImpl.save(SessionImpl.java:472) According to Hibernate DEBUG logs, everything looks to be working until it tries to cascade save the AddressImpl, and it rolls back. 2005-05-24 18:27:31,183 DEBUG engine.PersistenceContext - initializing non-lazy collections 2005-05-24 18:27:31,190 DEBUG def.DefaultSaveOrUpdateEventListener - saving transient instance 2005-05-24 18:27:31,193 DEBUG jdbc.AbstractBatcher - about to open PreparedStatement (open PreparedStatements: 0, globally: 0) 2005-05-24 18:27:31,194 DEBUG jdbc.AbstractBatcher - select SERVER_INFO_SEQ.nextval from dual 2005-05-24 18:27:31,195 DEBUG jdbc.AbstractBatcher - preparing statement 2005-05-24 18:27:31,237 DEBUG id.SequenceGenerator - Sequence identifier generated: 203783 2005-05-24 18:27:31,237 DEBUG jdbc.AbstractBatcher - about to close PreparedStatement (open PreparedStatements: 1, globally: 1) 2005-05-24 18:27:31,240 DEBUG jdbc.AbstractBatcher - closing statement 2005-05-24 18:27:31,241 DEBUG def.AbstractSaveEventListener - generated identifier: 203783, using strategy: org.hibernate.id.SequenceGenerator 2005-05-24 18:27:31,244 DEBUG def.AbstractSaveEventListener - saving [ServerImpl#203783] 2005-05-24 18:27:31,248 DEBUG engine.Cascades - processing cascade ACTION_SAVE_UPDATE for: ServerImpl 2005-05-24 18:27:31,249 DEBUG engine.Cascades$5 - cascading to saveOrUpdate: AddressImpl 2005-05-24 18:27:31,254 DEBUG def.AbstractSaveEventListener - transient instance of: AddressImpl 2005-05-24 18:27:31,255 DEBUG def.DefaultSaveOrUpdateEventListener - saving transient instance 2005-05-24 18:27:31,255 DEBUG jdbc.AbstractBatcher - about to open PreparedStatement (open PreparedStatements: 0, globally: 0) 2005-05-24 18:27:31,256 DEBUG jdbc.AbstractBatcher - select SERVER_ADDRESS_SEQ.nextval from dual 2005-05-24 18:27:31,257 DEBUG jdbc.AbstractBatcher - preparing statement 2005-05-24 18:27:31,264 DEBUG id.SequenceGenerator - Sequence identifier generated: 2007899 2005-05-24 18:27:31,266 DEBUG jdbc.AbstractBatcher - about to close PreparedStatement (open PreparedStatements: 1, globally: 1) 2005-05-24 18:27:31,267 DEBUG jdbc.AbstractBatcher - closing statement 2005-05-24 18:27:31,268 DEBUG def.AbstractSaveEventListener - generated identifier: 2007899, using strategy: org.hibernate.id.SequenceGenerator 2005-05-24 18:27:31,269 DEBUG def.AbstractSaveEventListener - saving [AddressImpl#2007899] 2005-05-24 18:27:31,282 DEBUG transaction.JDBCTransaction - rollback 2005-05-24 18:27:31,282 DEBUG jdbc.JDBCContext - before transaction completion 2005-05-24 18:27:31,283 DEBUG impl.SessionImpl - before transaction completion 2005-05-24 18:27:31,284 DEBUG transaction.JDBCTransaction - re-enabling autocommit 2005-05-24 18:27:31,285 DEBUG transaction.JDBCTransaction - rolled back JDBC Connection 2005-05-24 18:27:31,286 DEBUG jdbc.JDBCContext - after transaction completion 2005-05-24 18:27:31,286 DEBUG impl.SessionImpl - after transaction completion 2005-05-24 18:27:31,292 DEBUG impl.SessionImpl - closing session 2005-05-24 18:27:31,292 DEBUG jdbc.AbstractBatcher - closing JDBC connection (open PreparedStatements: 0, globally: 0) (open ResultSets: 0, globally: 0) 2005-05-24 18:27:31,297 DEBUG jdbc.JDBCContext - after transaction completion 2005-05-24 18:27:31,297 DEBUG impl.SessionImpl - after transaction completion