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Re: Query kernel objectsOfClass
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.
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
>
>