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From "Hugh Ross" <hh4r...@gmail.com>
Subject Re: Safe to replace valueObject in RowHandler?
Date Wed, 30 Jan 2008 19:36:24 GMT
Yes, we have begun experimenting with discriminators and subMaps.  But, I
want to avoid a 15 table join...


On 1/30/08, Clinton Begin <clinton.begin@gmail.com> wrote:
>
>  Unfortunately that's not possible in Java, let alone with iBATIS.
>
>
>
> If you're just trying to create subclasses based on a type column in the
> database, look up "discriminator" in the ibatis documentation or mailing
> list archives...
>
>
>
> Clinton
>
>
>
> *From:* Hugh Ross [mailto:hh4ross@gmail.com]
> *Sent:* January-30-08 9:23 AM
> *To:* user-java@ibatis.apache.org
> *Subject:* Safe to replace valueObject in RowHandler?
>
>
>
>
>
> Trying to be more specific:
>
>
>
> Is it safe to create another object in the handleRow method, and set the
> valueObject to it?
>
>
>
> Is it safe to use queryForObject from within a handleRow method?  I've
> seen other posts that imply it is.
>
>
>
> Will that object then replace the original one, if it was created by a
> queryForList or queryForObject call?  If I don't hear back, I guess I'll try
> it to see...
>
>
> Thanks...
>
>
> On 1/29/08, *Hugh Ross* <hh4ross@gmail.com> wrote:
>
>
>
> I have the good fortune to work on a large domain model, part of which
> uses too much inheritance.  I don't want to use a huge outer join with 15 or
> 20 tables in it.  I'm wondering if I can use RowHandlers to help.  In
> particular, is it possible for a RowHandler to replace the object passed to
> the handleRow method?
>
>
>
> E.g.,
>
>
>
> *public void handleRow (Object valueObject)
>    throws SQLException {
>    Person person = (Person) valueObject;
>    valueObject = MyFactory.createSubClassObject( person );*
>
> *}*
>
> Any other sample solutions to this kind of problem are also most
> welcome...
>
> * *
>
>
>

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