Hi Erich,
The Tuscany SDO generator is currently reusing the code generator
framework from Eclipse EMF project. If you look at the EMF generator,
you'll see that it's very powerful and customizable. In Tuscany all we've
done is create a simple command line invocation of the EMF generator,
using our own templates, and a few basic options.
One thing we don't support is regen/merge because the EMF merger prereqs
the Eclipse JDT, which we didn't want to drag into Tuscany as a
dependency. If someone is willing to write a standalone merger for
Tuscany, we could support regen.
Other things like generating a different base class or adding methods, are
supported in EMF but we don't have a way do it in with the Tuscany
generator yet. If you'd be willing to help get some of this function into
Tuscany, I'm sure a lot of people would be interested in it.
The bottom line is that real sophisticated tooling is outside of the scope
of the Tuscany project. Another possible direction for this is for some
Eclipse project to provide a fancy GUI-generator (and possibly other
tools) for developing Tuscany SDO applications. It would be nice to see
something like that get started.
Thanks,
Frank
Erich Rueede [EMAIL PROTECTED] wrote on 03/24/2007 10:14:20 AM:
Hi Kelvin,
if I understand you correctly, there is currently no
supported way of extending generated SDO
implementation classes:
1) I cannot have my own superclass of a generated SDO
class since this is already occupied
2) I cannot (yet) simply subclass a generated SDO
class, this may be addressed in TUSCANY-513
As a consequence I would have to modify the generated
SDO implementation class in order to offer custom
formatter and validation logic!? Is there eventually a
way to inject code using annotations? Or is it
possible to re-generate and prevent override of custom
code (merge)?
Thanks Erich
--- kelvin goodson [EMAIL PROTECTED] wrote:
Erich,
there's a number of ways you could be trying to
extend SDO generated
classes. You might be wanting to make a new SDO
Type which uses the
generated base class as an SDO basetype. If so then
that's the subject of
http://issues.apache.org/jira/browse/TUSCANY-513,
which I was hoping to
address at one time, but haven't got to it yet. If
you want to override
existing behaviour, I don't believe there are any
specific hook points we
expose to facilitate that currently, e.g. template
method patterns. If I
understand correctly, the -storePattern is there due
to the store pattern
that was implemented in the eclipse implementation
of SDO 1.0 which was an
implementation feature which allowed you to override
the gets and sets of
properties to a store instance (for example I used
this to allow lazy
instantiation using XML pull parsing) -- this kind
of feature is coming up
for discussion in the SDO 3 spec effort, but isn't
a functional part of the
current Tuscany SDO implementation.
Regards, Kelvin.
On 19/03/07, Erich Rueede [EMAIL PROTECTED] wrote:
Hi,
I'm trying to figure out how I extend a generated
static Java SDO with additional features, such as
my
own custom formatting an validation methods. Are
there
some hooks, that could be used for this subject?
Will
the generator's -storePattern eventually help?
Thanks, Erich
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