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Re: Query kernel objectsOfClass
On Fri, 13 Apr 2001, Dasarathi wrote:
> hi falko,
> we want the query kernel to finally support OQL, SQL etc etc
> and we thought we will start off with OQL.
> and we are not searching on this collection of objects,
> we will mostly do pointer traversal.unless u store names of
> all objects in a table or something we cant retrieve
> without objectsofclass. once this gets over then we can think
> of better ways of doing it.
> if u think that objectsofclasses is very easy to implement why
> dont u write that code such that it is used by the kernel alone.
???
Did I state anywhere that objectsOfClass is very easy to implement? I probably
lost you here.
Falko
>
> bye
> das
>
>
> On Thu, 12 Apr 2001, Falko Braeutigam wrote:
>
> > On Wed, 11 Apr 2001, Dasarathi wrote:
> > > The method objectsOfClass in externalDatabase is not
> > > implemented in ozone-6.1.I need it very much for our
> > > query kernel work to proceed.
> > > If someone has done it mail back
> >
> > objectsOfClass() was a wrong way in the design of the API and should be finally
> > removed from the API. If the query kernel needs this function (and surely many
> > others that are not part of the native ozone API) then it has to implement it
> > itself. This of course will make the query kernel depend on internal ozone data
> > structures and APIs but this (in contrast to a ordinary client program) is no
> > problem.
> >
> > Besides, das, it seems that you are following the way to treat all objects of a
> > class as a collection and apply the search on this class collection. Do you
> > think this approach is flexible enough to serve as a base for all (at least
> > many) query fron-ends? I mean, the Java object model itself doesn't have a
> > possibility to treat all objects of a class as collection. Only SQL/OQL and
> > related approaches do this...
> >
> >
> > Falko
> > --
> > ______________________________________________________________________
> > Falko Braeutigam mailto:falko@smb-tec.com
> > SMB GmbH http://www.smb-tec.com
> >
> >
--
______________________________________________________________________
Falko Braeutigam mailto:falko@smb-tec.com
SMB GmbH http://www.smb-tec.com