[hibernate-dev] Use cases for many-to-many collection of proxies?

[Steve Ebersole]

Gail is correct.  extra-lazy is something else completely.
 On Oct 22, 2013 4:00 PM, "Gail Badner" <gbadner at redhat.com> wrote:

> As far as I can tell, "extra-lazy" applies to the collection itself, not
> its elements. lazy="extra" is defined on <map>, <set>, <bag>, <idbag>,
> <list>.
>
> Currently, an extra-lazy collection can be configured having
> <many-to-many> with fetch="select" or outer-join="false". In the case of a
> map, doing a lookup by key would not initialize the map (because the map is
> extra-lazy) and it would return an uninitialized proxy for the value
> (because of the fetch="select" or outer-join="false").
>
> Do you think that would have a real-world application?
>
> Removing the fetch="select" or outer-join="false" functionality from
> <many-to-many> on an extra-lazy collection would not change the normal
> extra-lazy behavior, avoiding initialization of the collection itself.
>
> Gail
>
> ----- Original Message -----
> > From: "Sanne Grinovero" <sanne at hibernate.org>
> > To: "Gail Badner" <gbadner at redhat.com>
> > Cc: "hibernate-dev" <hibernate-dev at lists.jboss.org>
> > Sent: Monday, October 21, 2013 4:47:58 PM
> > Subject: Re: [hibernate-dev] Use cases for many-to-many collection of
> proxies?
> >
> > Hi Gail,
> > does this impact as well the "extra-lazy" collections?
> > I definitely had great use cases for them in the past.
> >
> > On 21 October 2013 19:22, Gail Badner <gbadner at redhat.com> wrote:
> > > Are there real-world use cases where an initialized many-to-many
> collection
> > > should contain elements that are uninitialized proxies
> (HibernateProxy),
> > > rather than entity instances?
> > >
> > > Currently, it is possible to configure this behavior using either:
> > >
> > > <many-to-many ... fetch="select"/>
> > > <many-to-many ... outer-join="false"/>
> > >
> > > We are considering removing this capability if there are no real-world
> use
> > > cases.
> > >
> > > Fetch profiles do not provide this level of granularity. The fetch
> style
> > > for the collection itself, but not its elements, can be configured
> using a
> > > fetch profile.
> > >
> > > As far as I know, JPA does not provide this level of granularity
> either.
> > >
> > > Please let us know if you are using this functionality.
> > >
> > > Thanks,
> > > Gail
> > > _______________________________________________
> > > hibernate-dev mailing list
> > > hibernate-dev at lists.jboss.org
> > > https://lists.jboss.org/mailman/listinfo/hibernate-dev
> >
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