Folks,
we need to map an abstract class and it's implementation to two different tables we
tried the following :
> abstract class A {
>
> private id
> private valueA
> protected ojbConcreteClass
> }
>
> class B extends A{
>
> private id2
> private valueB
> }
>
> the repository file:
>
> <class-descriptor
> class="A"
> table="A_TABLE">
>
>
> <field-descriptor
> name="id"
> column="ID"
> jdbc-type="INTEGER"
> primarykey="true"
> autoincrement="true"
> />
> <field-descriptor
> name="valueA"
> column="VALUE"
> jdbc-type="INTEGER"
> />
>
> </class-descriptor>
>
> <class-descriptor
> class="B"
> table="B_TABLE"
> >
>
> <field-descriptor
> name="id2"
> column="ID"
> jdbc-type="INTEGER"
> primarykey="true"
> autoincrement="true"
> />
>
>
> <field-descriptor
> name="valueB"
> column="VALUE"
> jdbc-type="INTEGER"
> />
>
> <field-descriptor>
> name="ojbConcreteClass">
> column="CLASS_NAME">
> jdbc-type="VARCHAR">
> />
>
> <reference-descriptor name="super"
> class-ref="A" auto-update="true">
> <foreignkey field-ref="id2"/>
> </reference-descriptor>
>
> </class-descriptor>
>
we encounter in the following error:
org.apache.ojb.broker.PersistenceBrokerException:
org.apache.ojb.broker.metadata.MetadataException: java.lang.Instantiat
ionException
what are we doing wrong ?
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