Hi,

How do I implement this inheritance using "Table per class hierarchy"?

My problem is that I have abstract inheritance...

Thanks,

Andre

public abstract class Documento
public abstract class DocumentoPrincipal extends Documento
public abstract class DocumentoAuxiliar extends Documento
public class DocumentoPrincipalPIE extends DocumentoPrincipal
public class DocumentoAuxiliarOIE extends DocumentoAuxiliar

why is abstract inheritance a problem?

How do I implement Documento mapping?

Actually I'm duplicating common fields (this example uses Table per class hierarchy):

<class name="DocumentoPrincipal" table="DOCUMENTO">
<!-- same fields -->
...
<discriminator column="COD_TIPO_DOC" type="java.lang.String"/>
<subclass name="DocumentoPrincipalPIE" discriminator-value="1" />
</class>

<class name="DocumentoAuxiliar" table="DOCUMENTO">
<!-- same fields -->
...
<discriminator column="COD_TIPO_DOC" type="java.lang.String"/>
<subclass name="DocumentoAuxiliarOIE" discriminator-value="6" />
</class>

Problem solved, but now I have another error.

DocumentoAuxiliar has a reference to his parent (another DocumentoAuxiliar or a DocumentoPrincipal, both extends abstract class Document)

Running my program I receive: "Cannot instantiate abstract class or interface: Documento". Commenting many-to-one relationship everthing works fine...

<class name="DocumentoAuxiliar" table="DOCUMENTO">
<many-to-one name="documentoPai" class="Documento" unique="true">
<column name="NUM_DOCTO_PRINCIPAL" />
</many-to-one>
</class>

How do I fix it?

Thanks,

Andre