Just for kicks I created a test DataMap with a few entities mapped to
CayenneDataObject. And you know - it works! A basic test with
registration/insertion/commit/select/relationships went without a
glitch with the current CVS code. Almost... a small EntityResolver
patch was still needed.
I'll enter an issue in Jira to get back to it a bit later. Looks like
we'll be getting this functionality in 1.2.
Andrus
On Dec 8, 2005, at 11:53 PM, Jonathan Carlson wrote:
> Thanks! Very cool.
>
> Along with db.apache.org's DDLUtils (I know, it uses a different XML
> format) one could feasibly put together a database management web app
> with a dynamic webapp builder (using Cayenne generic record
> functionality for data access) and a dynamically compilable scripting
> language like Groovy for the custom code.
>
> (Sigh, I always have more ideas than time. I'm getting the webapp
> builder going pretty well, though... in my minimal free time using
> Wicket :-)
>
> - Jonathan
>
>
>
>>>> andru..bjectstyle.org 2005-12-08 2:31:22 PM >>>
> To expand on what Mike just said, right now a class generation /
> compilation step is needed. Functionality similar to EOF
> EOGenericRecord was requested before, but the main stumbling block
> was the requirement that two different entities had to be of two
> different classes. In other words a single Java class couldn't be
> mapped to multiple entities.
>
> This is about to change. In yet unreleased 1.2M9 we moved away from
> that (for an unrelated reason) and now ObjectId and the rest of the
> access stack uses String entity name as the entity type indicator. So
>
> we may actually get EOGenericRecord functionality for free as a
> result of this change, though extra testing is required to be
> entirely sure.
>
> Andrus
>
>
> On Dec 8, 2005, at 10:45 PM, Mike Kienenberger wrote:
>> Yes, I would think it'd be possible to do this, but you're actually
>> talking about doing two different and unrelated things.
>>
>> As for creating new data maps and entity representations, it is a
>> matter of creating DataDomain/DataMap/ObjEntity/DbEntity instances
>> with code rather than loading them from an xml file.
>>
>> The generated entity classes are just convenience classes to make
>> working with your data easier and typesafe. If you look at the
> code
>> of the generated classes, it just delegates those calls back to
>> CayenneDataObject, passing the attributes as strings. It works
> like
>> EOGenericRecord if you're familiar with EOF.
>>
>> On 12/8/05, Jonathan Carlson <Jonathan.Carlso..atun.com> wrote:
>>> Just curious,
>>>
>>> Is it possible to define a database mapping using generic
> DataObjects
>>> instead of a subclass? I'm just curious how dynamic Cayenne is,
>>> or if
>>> some class compilation is necessary to add support for a new table.
>>>
>>> Thanks,
>>>
>>> - Jonathan
>
>
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