why am i getting this mail evry half an hour . this is a ejb forum not a
place for body shoppers please
----- Original Message -----
From: Leslie Schultz <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, December 19, 2000 9:29 PM
Subject: Re: Database Schemas & Maps
> I am looking for experienced Java Programmers and Developers for both
> contract and perm positions in the Northern VA, MD and Washington DC area.
> If you are interested, or know someone who is, please send your resume to:
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> standards. I look forward to working with you. Leslie
> ----- Original Message -----
> From: John Harby <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Tuesday, December 19, 2000 9:39 AM
> Subject: Re: Database Schemas & Maps
>
>
> > I may not be interpreting your definitions correctly but
> > I would say that if you are using container managed persistence
> > the conversion would occur in the map. However, if you are
> > using bean mananged persistence the bean developer is responsible
> > for handling the conversion.
> >
> >
> > >From: May Charles N <[EMAIL PROTECTED]>
> > >Reply-To: A mailing list for Enterprise JavaBeans development
> > ><[EMAIL PROTECTED]>
> > >To: [EMAIL PROTECTED]
> > >Subject: Database Schemas & Maps
> > >Date: Tue, 19 Dec 2000 08:52:58 -0500
> > >
> > > > Okay, I'm a little lazy... I'm posting this question before fully
> > >perusing
> > > > the EJB spec.
> > > >
> > > > Between an EJB object model and its database schema sits a map which
> > > > coordinates the correspondence of EJB beans & fields to schema
tables
> &
> > > > columns.
> > > >
> > > > My question is, where should the conversion from java types to and
> from
> > > > JDBC types occur? Should it happen in the schema or in the map? Does
> the
> > > > EJB spec decree where the conversion must occur, or where it cannot
> > >occur?
> > > >
> > > > It seems to me that the schema should be as close an approximation
to
> > >the
> > > > actual database structure as possible, and should be based purely
upon
> > > > JDBC types. I believe that the *map* is where the conversions should
> > > > occur. That is, in my mind, the map should not be a simple
> > >correspondence
> > > > map -- taking fields to columns and back -- it should be smarter
than
> > > > that, able to perform the conversions between the java types and the
> > >JDBC
> > > > types.
> > > >
> > > > The problem is, my development environment (VisualAge) requires the
> > > > conversions to occur in the schema itself, rather than in the map.
> This
> > > > causes me much consternation every time I have to reimport a
database
> > > > schema and either edit the JDBC field types or put converters in
place
> > >in
> > > > order to make the schema correspond to my EJB model. Shouldn't the
> > > > converters really be in the map? Or would this violate the EJB spec?
> > > >
> > > > Charles May, Software Engineer
> > > > AFCO Credit Corp. - Pittsburgh Systems Group
> > > > A Mellon Financial Company
> > > >
> > > >
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