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Subject: RE: Plan to enhance Database Mapping info
Date: Fri, 28 Apr 2006 10:08:45 -0400
Message-ID: <8F5843B903F59D4C8C6806BB49A39119062A6E@dukece-mail3.dukece.com>
Thread-Topic: Plan to enhance Database Mapping info
Thread-Index: AcZpyJnJlZPulCX3THix8KZpFS/SigA/mo3A
From: "Greg Monroe" <Greg.Monroe@DukeCE.com>
To: "Apache Torque Developers List" <torque-dev@db.apache.org>


> -----Original Message-----
> From: Thomas Vandahl [mailto:thomas.vandahl@tewisoft.de]=20
>=20
> Please keep in mind that the Avalon interface=20
> (Torque/TorqueComponent) should be updated as well.

In digging into the code some more, I probably won't add the
methods to the Torque class.  Instead, I'll just add an=20
initialize() method to the DatabaseMap class.  This means
that not interfaces will need to be updated.  More on this
when I answer Thomas F's note.

>=20
> What about the managers? Maybe I'm the only one who uses JCS caching,=20
> but I would love to see them considered...
>=20
> This would require some getManager() method in all objects and=20
> getOmClass(), getPeer() and getTableMap() in the managers.

Good point and the reason to run this by everyone first.  Once=20
again, more on this in the next note.
>=20
> Just one question for my understanding. Why do you need special=20
> introspection code if you can have Beans generated? Could you=20
> give some example where this is useful?

In my particular case, I'm looking at having some generic XML=20
import and export code that uses the Torque generated schema DTD.=20

For the import case, as the XML file is parsed, the element and=20
attribute tag strings have to be mapped into the Torque objects
that will be populated and saved.  Since I want it to be generic=20
so that no code has to be changed as tables and columns are added
or modified, I need a fully populated map structure find this=20
info.

In the export case, I want to generate the proper element and=20
attribute tags from a (possibly mixed) List of objects generated
by application specific code.  So I have to be able to inspect
each object on the list and find the matching strings that
identify it in the XML output file.


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