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Re: java Collections



I did not understand the question. I used SortedMap (TreeMap) collections
like a persistent ozone object atribute and worked. The garage sample uses a
collection.
Are you saying that all proxy objects  of the collection are loaded to
memory at one time? (even if that consists of 1000000 of elements?)
-----Mensagem original-----
De: Gerd Mueller <gerd@smb-tec.com>
Para: ozone-users@ozone-db.org <ozone-users@ozone-db.org>
Data: Sexta-feira, 17 de Agosto de 2001 06:02
Assunto: Re: java Collections


>On Thursday 16 August 2001 21:12, you wrote:
>> Hello,
>>
>> I'm considering using ozone for a project (just started looking at it),
but
>> looking through the API documentation, I find no implementations of
>> java.util.Map, java.util.SortedMap, java.util.Set, java.util.SortedSet,
>> which I need.  I found a few implementations of other java collections in
>> package org.ozoneDB.odmg.  I need these collections to contain thousands
or
>> perhaps millions of objects, so keeping the entire collection in memory
at
>> once (such as the standard java implementations do) will not work.  Any
>> suggestions?
>
>At the moment there are no such collections but it would be nice to have
>them. I would need them too for the TM4J ozone binding (a topic map
>implementation). So, we could start a subproject of ozone for such
>collections (?).
>
>> I am not so much interested in a database which allows inserts and
queries
>> by identity, but rather a database which consists of (a potentially quite
>> large graph of) persistent objects, which may be accessed by
"reachability"
>> of member methods and fields.  Quoting from the ozone site, "The main
goal
>> of ozone is to add persistence and transactions to the Java object model
in
>> a transparent manner. ozone applications should look and work like
ordinary
>> Java applications."  That would be quite nice.
>
>And IMHO it richs this goal. In TM4J we store a complete topic graph in
ozone
>which works quit well.
>
>Best Regards,
>Gerd
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