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From Mike Kienenberger <>
Subject Re: Vertical inheritance
Date Wed, 19 May 2010 12:58:52 GMT
If there is a relatively-isolated subset of the task that I can work
on in the meantime, let me know.

Perhaps some modeler/config-file support or even something more
involved in the guts.

On Wed, May 19, 2010 at 8:28 AM, Andrus Adamchik <> wrote:
> Hi Mike,
> Would be cool to have you back :-)
> Yeah, my estimate re: horizontal+vertical inheritance was that it would
> require lots of *uninterrupted* work on my end (lets say 4 weeks). Since I
> have to work on other projects at the same time, that's the luxury I can't
> afford (in fact it already resulted in a few abandoned local git branches
> where I started to develop some idea, only to realize I can't remember what
> it was when I come back to it 2 months later).
> I am going to WWDC in a few weeks. Maybe I can use this "vacation" time to
> give it another shot (especially since it involves a trans-atlantic flight
> where nobody can call me or send an email ... this may be equivalent to 4
> weeks of office time :-)). I was going to work on some other 3.1 features
> now, but since inheritance has always been high on my list of things to do,
> I wouldn't mind re-prioritizing...
> Andrus
> On May 19, 2010, at 1:19 AM, Mike Kienenberger wrote:
>> Andrus,
>> In the horizontal inheritance jira issue, you mentioned the following:
>> =================
>> Unfortunately we dropped the ball on horizontal inheritance in 3.0 due
>> to the lack of time by people who could make it happen (the
>> implementation is rather deep and involved). I very much like to
>> revive this effort in 3.1 beyond a few Modeler patches that we have in
>> place so far. It is in my queue right after the new DI stuff.
>> =================
>> The primary JSF/JPA team project I have been working on is now
>> considering switching to Cayenne and dropping JPA.   One of the
>> concerns is vertical inheritance support.   Any thoughts on how long
>> it might take and how much effort is involved before vertical
>> inheritance is a first-class citizen?   If we switch, it is likely
>> that I will be able to contribute toward this effort -- it was hard to
>> find time to work on Cayenne when I wasn't doing any paid projects
>> involving Cayenne.

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