[hibernate-dev] 6.0 - Session#createFilter

[Steve Ebersole]

I think you are not understanding createFilter:

http://docs.jboss.org/hibernate/orm/current/javadocs/org/hibernate/Session.html#createFilter

Again, to call filter you'd have to have access to the Collection you want
to filter.

On Mon, Jan 2, 2017 at 2:40 AM Christian Beikov <christian.beikov at gmail.com>
wrote:

> Let's say we have this entity with an attribute that is not directly
> exposed.
>
> class EntityA { String field; }
>
> and then you pass a collection of EntityA instances to createFilter like
>
> Collection<EntityA> collection = ...
> collection = session.createFilter(collection, "field =
> 'abc%'").getResultList();
>
> See my point? Since Hibernate can access the field directly, this works,
> but with streams you'd need to expose the field via a getter so you can
> filter for it.
>
>
> Am 02.01.2017 um 09:25 schrieb Steve Ebersole:
>
> Could you explain the situation where you would map a collection but not
> expose it?  And btw even create createFilter would not work there because
> you have to pass createFilter the collection
>
> On Mon, Jan 2, 2017, 2:15 AM Christian Beikov <christian.beikov at gmail.com>
> wrote:
>
> Well it does when you consider that there might be no getter for a field.
> With createFilter you could still filter the result list without exposing
> direct access to the field via a getter.
>
> Am 02.01.2017 um 08:52 schrieb Steve Ebersole:
>
> Field-access would have zero bearing on this
>
> On Mon, Jan 2, 2017 at 1:30 AM Christian Beikov <
> christian.beikov at gmail.com> wrote:
>
> Sounds good to me, but maybe we could do a poll to see if people are
> using this? I don't know if the filter also works for field based access
> strategy, but that could be a reason for keeping it around.
>
> Regards,
>
> Christian
>
>
> Am 31.12.2016 um 21:00 schrieb Steve Ebersole:
> > As I have not been hearing hardly any feedback on these 6.0 design
> > questions I have been trying to start, I'll be doing something different
> in
> > this and any additional emails.. I'll state what I propose to do and if
> > anyone has issue with it they can make a counter proposal.  Otherwise I
> > plan on following through with my proposal.
> >
> > I plan on removing Session#createFilter.  There are numerous reasons why
> > which I can discuss if anyone is interested in exploring this.
> >
> > Ultimately I think it makes sense to handle this via Java 8 streams[1]
> > although I am not sure that needs to happen in 6.0
> >
> > [1] https://hibernate.atlassian.net/browse/HHH-10962
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