Re: Do mapped superclasses work at all in OpenJPA?

[Dain Sundstrom]

Are you sure that is the right issue?  It seems to be about a  
different problem.

-dain
On Feb 12, 2007, at 7:14 PM, Craig L Russell wrote:

Hi Dain,

This might be related to a bug in xml overrides http:// 
issues.apache.org/jira/browse/OPENJPA-97. Just fer grins, do you  
have a way to annotate the mapped superclass?

Craig

On Feb 12, 2007, at 7:01 PM, Dain Sundstrom wrote:

When I try to use a simple mapped super class with a trivial sub  
class (no fields or methods), I get the following exception:

ERROR - The bean instances business method encountered a system  
exception:org.apache.openejb.test.entity.cmp.BasicCmpBean.pcGetManage 
dFieldCount()I
java.lang.NoSuchMethodError:  
org.apache.openejb.test.entity.cmp.BasicCmpBean.pcGetManagedFieldCoun 
t()I
	at  
openejb.org.apache.openejb.test.entity.cmp.BasicCmpBean.<clinit> 
(Unknown Source)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:242)
	at org.apache.openjpa.meta.MetaDataRepository.classForName 
(MetaDataRepository.java:1224)
	at org.apache.openjpa.meta.MetaDataRepository.loadPersistentTypes 
(MetaDataRepository.java:1212)
	at  
org.apache.openjpa.jdbc.kernel.JDBCBrokerFactory.synchronizeMappings( 
JDBCBrokerFactory.java:145)
	at org.apache.openjpa.jdbc.kernel.JDBCBrokerFactory.newBrokerImpl 
(JDBCBrokerFactory.java:127)
	at org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker 
(AbstractBrokerFactory.java:164)
	at org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker 
(DelegatingBrokerFactory.java:139)
	at  
org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityM 
anager(EntityManagerFactoryImpl.java:187)
	at  
org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityM 
anager(EntityManagerFactoryImpl.java:52)
	at  
org.apache.openejb.persistence.JtaEntityManagerRegistry.getEntityMana 
ger(JtaEntityManagerRegistry.java:105)


Which seems to indicate to me that OpenJPA isn't enhancing the  
mapped super class.  Does OpenJPA support mapped super classes?

Here is are my entity mappings:

<entity-mappings xmlns="http://java.sun.com/xml/ns/persistence/ 
orm" version="1.0">
    <mapped-superclass  
class="org.apache.openejb.test.entity.cmp.BasicCmpBean">
        <attributes>
            <id name="primaryKey"/>
            <basic name="firstName"/>
            <basic name="lastName"/>
            <transient name="nextId"/>
            <transient name="ejbContext"/>
            <transient name="allowedOperationsTable"/>
        </attributes>
    </mapped-superclass>
    <entity name="BasicCmpBean"  
class="openejb.org.apache.openejb.test.entity.cmp.BasicCmpBean">
        <description>BasicCmpBean</description>
        <attribute-override name="primaryKey">
            <column name="primaryKey"/>
        </attribute-override>
        <attribute-override name="firstName">
            <column name="firstName"/>
        </attribute-override>
        <attribute-override name="lastName">
            <column name="lastName"/>
        </attribute-override>
    </entity>
</entity-mappings>


Thanks for any help,

-dain

Craig Russell
Architect, Sun Java Enterprise System http://java.sun.com/products/jdo
408 276-5638 mailto:[EMAIL PROTECTED]
P.S. A good JDO? O, Gasp!