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Am Donnerstag, 12 April 2001 schrieben Sie:

>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
>> 
>>
>