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From: Michael Gentry <mgentry@masslight.net>
Date: Tue, 7 Apr 2015 10:39:32 -0400
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Subject: Re: New features in Select API
To: Cayenne Developers <dev@cayenne.apache.org>
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Hi Andrus!

On Tue, Apr 7, 2015 at 9:54 AM, Andrus Adamchik <andrus@objectstyle.org>
wrote:

> Hey Mike,
>
>
> > On Apr 7, 2015, at 4:43 PM, Michael Gentry <mgentry@masslight.net>
> wrote:
> >
> > Select.select(ObjectContext context, int size);
> >
> > Then selectFirst would just call it with a size = 1.  This would give you
> > an easy way to support fetching the top 5 (or 10 or any other number)
> > newest/hottest/etc news articles (to use your example).
>
> FWIW, an equivalent api for size > 1 API would be:
>
> ObjectSelect.query(..).limit(5).select(context);


Yes, but I was just trying to suggest something that mapped into
Select.java as well.


> Also, maybe I'm misreading the JavaDocs, but for Select.selectOne, it
> says:
> > Essentially the inversion of "ObjectContext.selectOne(Select)".
> >
> > I don't think inversion is the correct word, since it means opposite, and
> > they aren't opposites.  A couple others use the word inversion, too,
> when I
> > don't think that is what is meant.
>
> I think this doc was copied from ObjectSelect.selectOne, etc. Here
> inversion means "call order inversion". I.e. you get the same result, but
> perform the invocation in a different (opposite) way:
>
> 1. List<T> objects = ObjectSelect.query(T.class).select(context);
> 2. List<T> objects = context.select(ObjectSelect.query(T.class));
>
> Does it make sense with such explanation?


Sort of, but I still found it confusing.  Perhaps something like:

    Essentially the equivalent of "ObjectContext.selectOne(Select)".

Thanks,

mrg

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