yes, if we resort into using xml configt' really just a matter of providing
implmentations that work with the different JPA providers.

What doyou think Derek?

On Tue, Nov 25, 2008 at 10:12 PM, Derek Chen-Becker
<[EMAIL PROTECTED]>wrote:

> That's a very interesting idea. It's been a long time since I've touched
> the XML mappings, but JPA definitely supports a newer version of it now. Let
> me look into that.
> Derek
>
>
> On Tue, Nov 25, 2008 at 2:55 PM, David Pollak <
> [EMAIL PROTECTED]> wrote:
>
>>
>>
>> On Tue, Nov 25, 2008 at 12:35 PM, Derek Chen-Becker <
>> [EMAIL PROTECTED]> wrote:
>>
>>> I'll look at PropertyAccessor, but I would prefer something that isn't
>>> Hibernate specific.
>>
>>
>> I agree that Hiberate specific stuff may be less than optimal.
>>
>> Is there a way that we can queries the models at start-up time and
>> generate XML that does EJB 2.1 style mapping such that we can feed that into
>> JPA to do the mapping?
>>
>>
>>>
>>> Thanks,
>>>
>>> Derek
>>>
>>>
>>> On Tue, Nov 25, 2008 at 1:24 PM, Viktor Klang <[EMAIL PROTECTED]>wrote:
>>>
>>>> Derek, I still humbly suggest writing an implementation of
>>>> PropertyAccessor<http://www.hibernate.org/hib_docs/v3/api/org/hibernate/property/PropertyAccessor.html>to
>>>>  map the values between JPA and the Lift business objects.
>>>>
>>>> Then, in the Hibernate-mapping or the Configuration object, just define:
>>>>
>>>> <hibernate-mapping
>>>>    default-cascade="none"
>>>>
>>>>    default-access="*net.liftweb.jpa.LiftFieldAccessor*" //Or something else
>>>>    package="bahblah">
>>>>
>>>>
>>>> Cheers,
>>>> V
>>>> ---------- Forwarded message ----------
>>>> From: Derek Chen-Becker <[EMAIL PROTECTED]>
>>>> Date: Tue, Nov 25, 2008 at 3:54 PM
>>>> Subject: [Lift committers] Re: Adding JPA scaffolding to lift?
>>>> To: [EMAIL PROTECTED]
>>>>
>>>>
>>>> I thought about it a bit last night. JPA infers entity members from
>>>> either fields or getter/setter pairs. In that sense, I could create a JPA
>>>> object like
>>>>
>>>> class MyEntity extends Record[MyEntity] {
>>>>   object nameField extends StringField(this,100)
>>>>
>>>>   def name = nameField.value
>>>>
>>>>   def name_=(value : String) = nameField.set(value)
>>>> }
>>>>
>>>> But that seems a bit clunky. The other option may be to somehow come up
>>>> with a modified Field (JPAField?) trait that can access instance fields,
>>>> perhaps via a closure.
>>>>
>>>> Derek
>>>>
>>>>
>>>> On Tue, Nov 25, 2008 at 2:42 AM, Tim Perrett <[EMAIL PROTECTED]>wrote:
>>>>
>>>>>
>>>>> Hmm yeah - I wonder if record will need to be some kind of DAO for
>>>>> JPA?
>>>>>
>>>>> On Nov 24, 11:42 pm, "Derek Chen-Becker" <[EMAIL PROTECTED]>
>>>>> wrote:
>>>>> > I'm thinking about it. I think the fact that fields on a record are
>>>>> defined
>>>>> > as objects and not members may complicate things a bit, but I'm still
>>>>> > digesting all of the new stuff.
>>>>> >
>>>>> > Derek
>>>>> >
>>>>> > On Mon, Nov 24, 2008 at 12:01 PM, Tim Perrett <[EMAIL PROTECTED]>
>>>>> wrote:
>>>>> >
>>>>> > > How did this go Derek?
>>>>> >
>>>>> > > Now we have the record stuff in there, are you going to take a bash
>>>>> at
>>>>> > > writing a JPA backend? That would rock!
>>>>> >
>>>>> > > Cheers, Tim
>>>>> >
>>>>> > > On Nov 13, 2:17 pm, "Derek Chen-Becker" <[EMAIL PROTECTED]>
>>>>> wrote:
>>>>> > > > Fair enough. I'll check out the Record branch and start looking
>>>>> at it.
>>>>> >
>>>>> > > > Thanks,
>>>>> >
>>>>> > > > Derek
>>>>> >
>>>>> > > > On Thu, Nov 13, 2008 at 6:42 AM, Marius <[EMAIL PROTECTED]>
>>>>> wrote:
>>>>> >
>>>>> > > > > +1
>>>>> >
>>>>> > > > > On Nov 9, 12:56 am, "David Pollak" <
>>>>> [EMAIL PROTECTED]>
>>>>> > > > > wrote:
>>>>> > > > > > I'd rather wait until Marius and I are done with the
>>>>> record/field
>>>>> > > stuff
>>>>> > > > > and
>>>>> > > > > > do a JPA back-end to that.
>>>>> >
>>>>> > > > > > On Sat, Nov 8, 2008 at 1:39 PM, TylerWeir <
>>>>> [EMAIL PROTECTED]>
>>>>> > > wrote:
>>>>> >
>>>>> > > > > > > We may want to also offer an archetype that has the
>>>>> skeleton of a
>>>>> > > JPA-
>>>>> > > > > > > aware app ready to go.
>>>>> >
>>>>> > > > > > > And +1 for adding this to Lift proper.
>>>>> >
>>>>> > > > > > > On Nov 8, 2:43 pm, Tim Perrett <[EMAIL PROTECTED]>
>>>>> wrote:
>>>>> > > > > > > > Sounds like a good idea Derek - this is annoying the ass
>>>>> out of
>>>>> > > me
>>>>> > > > > > > > right now having to copy and paste the JPA scala wrapper
>>>>> files
>>>>> > > from
>>>>> > > > > > > > project to project.... so, sure, this would be a great
>>>>> idea and
>>>>> > > one
>>>>> > > > > > > > welcomed by the majority of lift-jpa users.
>>>>> >
>>>>> > > > > > > > +1 for including this in lift proper
>>>>> >
>>>>> > > > > > > > Cheers, Tim
>>>>> >
>>>>> > > > > > > > On Nov 8, 4:06 pm, "Derek Chen-Becker" <
>>>>> [EMAIL PROTECTED]>
>>>>> > > > > wrote:
>>>>> >
>>>>> > > > > > > > > I've had several requests to move the JPA.scala source
>>>>> > > > > > > (ScalaEntityManager
>>>>> > > > > > > > > and ScalaQuery) out of the demo site and into lift
>>>>> proper so
>>>>> > > that
>>>>> > > > > > > people can
>>>>> > > > > > > > > just extend instead of copying and pasting code. Would
>>>>> anyone
>>>>> > > be
>>>>> > > > > > > opposed to
>>>>> > > > > > > > > me making a new lift-jpa module to hold common classes?
>>>>> >
>>>>> > > > > > > > > Derek
>>>>> >
>>>>> > > > > > --
>>>>> > > > > > Lift, the simply functional web frameworkhttp://liftweb.net
>>>>> > > > > > Collaborative Task Managementhttp://much4.us
>>>>> > > > > > Follow me:http://twitter.com/dpp
>>>>> > > > > > Git some:http://github.com/dpp
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Viktor Klang
>>>> Senior Systems Analyst
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>
>>
>> --
>> Lift, the simply functional web framework http://liftweb.net
>> Collaborative Task Management http://much4.us
>> Follow me: http://twitter.com/dpp
>> Git some: http://github.com/dpp
>>
>>
>>
>
> >
>


-- 
Viktor Klang
Senior Systems Analyst

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