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Posted to jdo-dev@db.apache.org by Michael Watzek <mw...@spree.de> on 2005/07/26 12:15:46 UTC
Question about orm metadata for inheritance
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/
-------------------------------------------------------------------
Re: Question about orm metadata for inheritance
Posted by er...@jpox.org.
Michael,
We dont support "Insurance.insid" (SuperclassName.fieldName).
On a related issue, we also dont support fetch plans/indexes declared with
SuperclassName.fieldName, fieldName#key, fieldName#value or fieldName#element.
Regards,
Erik Bengtson
Quoting Michael Watzek <mw...@spree.de>:
> Hi Erik,
>
> I'm just curious. Can you explain in more detail which parts of the orm
> metadata JPOX does not support right now? Is it inheritance strategy
> "new-table" in conjunction with a <join> element, or the repitition of
> superclass fields in subclasses?
>
> Regards,
> Michael
>
> > Michael,
> >
> > No it is not valid. The below is valid, I think.
> >
> > <field name="Insurance.insid" column="INSID" primary-key="true"/>
> > <field name="Insurance.carrier" column="CARRIER"/>
> > <field name="Insurance.employee" column="EMPLOYEE">
> > <foreign-key/>
> > </field>
> >
> > JPOX does not support the above syntax, yet.
> >
> > Regards,
> >
> > Erik Bengtson
> >
> > Quoting Michael Watzek <mw...@spree.de>:
> >
> >
> >>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/
> >>-------------------------------------------------------------------
> >>
> >
> >
> >
>
>
> --
> -------------------------------------------------------------------
> 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/
> -------------------------------------------------------------------
>
Re: Question about orm metadata for inheritance
Posted by Michael Watzek <mw...@spree.de>.
Hi Erik,
I'm just curious. Can you explain in more detail which parts of the orm
metadata JPOX does not support right now? Is it inheritance strategy
"new-table" in conjunction with a <join> element, or the repitition of
superclass fields in subclasses?
Regards,
Michael
> Michael,
>
> No it is not valid. The below is valid, I think.
>
> <field name="Insurance.insid" column="INSID" primary-key="true"/>
> <field name="Insurance.carrier" column="CARRIER"/>
> <field name="Insurance.employee" column="EMPLOYEE">
> <foreign-key/>
> </field>
>
> JPOX does not support the above syntax, yet.
>
> Regards,
>
> Erik Bengtson
>
> Quoting Michael Watzek <mw...@spree.de>:
>
>
>>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/
>>-------------------------------------------------------------------
>>
>
>
>
--
-------------------------------------------------------------------
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/
-------------------------------------------------------------------
Re: Question about orm metadata for inheritance
Posted by er...@jpox.org.
Michael,
No it is not valid. The below is valid, I think.
<field name="Insurance.insid" column="INSID" primary-key="true"/>
<field name="Insurance.carrier" column="CARRIER"/>
<field name="Insurance.employee" column="EMPLOYEE">
<foreign-key/>
</field>
JPOX does not support the above syntax, yet.
Regards,
Erik Bengtson
Quoting Michael Watzek <mw...@spree.de>:
> 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/
> -------------------------------------------------------------------
>