db-jdo-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Michael Watzek <mwa.t...@spree.de>
Subject Question about orm metadata for inheritance
Date Tue, 26 Jul 2005 10:15:46 GMT
Hi Craig, Andy, Erik,

I'm testing a kind of inheritance mapping using strategy "new-table" 
where each table contains columns for all fields. Thus, a table of a 
subclass contains columns for the declared fields *and* for the fields 
of all superclasses, e.g. this is the orm metadata of classes 
"Insurance" and "DentalInsurance":

<orm>
     <package name="org.apache.jdo.tck.pc.company">
         ...
         <class name="Insurance" table="insuranceplans">
             <inheritance strategy="new-table"/>
             <field name="insid" column="INSID" primary-key="true"/>
             <field name="carrier" column="CARRIER"/>
             <field name="employee" column="EMPLOYEE">
                  <foreign-key/>
             </field>
         </class>

         <class name="DentalInsurance" table="dentalinsurance">
             <inheritance strategy="new-table">
                 <join column="INSID"/>
             </inheritance>
             <field name="insid" column="INSID" primary-key="true"/>
             <field name="carrier" column="CARRIER"/>
             <field name="employee" column="EMPLOYEE">
                  <foreign-key/>
             </field>
             <field name="lifetimeOrthoBenefit" 
column="LIFETIME_ORTHO_BENEFIT"/>
         </class>
         ...
     </package>
</orm>

The Completeness test throws an exception applying this mapping 
("org.jpox.metadata.InvalidMetaDataException: Class 
org.apache.jdo.tck.pc.company.DentalInsurance has field 
org.apache.jdo.tck.pc.company.DentalInsurance.carrier declared in 
MetaData, but this field doesnt exist in the class!").

My question: Is this a valid mapping, if fields of superclasses are 
repeated in the orm metadata of subclasses?

Regards,
Michael
-- 
-------------------------------------------------------------------
Michael Watzek                  Tech@Spree Engineering GmbH
mailto:mwa.tech@spree.de        Buelowstr. 66
Tel.:  ++49/30/235 520 36       10783 Berlin - Germany
Fax.:  ++49/30/217 520 12       http://www.spree.de/
-------------------------------------------------------------------

Mime
View raw message