Hi again,
> -----Mensaje original-----
> De: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] En nombre de Michiel Meeuwissen
> Enviado el: mi�rcoles, 04 de agosto de 2004 16:53
> Para: [EMAIL PROTECTED]
> Asunto: Re: Displaying most recent objects
>
> Ignacio Renuncio <[EMAIL PROTECTED]> wrote:
> > We finally put the following code:
> >
> > // We get a nodemanager for the desired information type
> NodeManager
> > nodeManager = cloud.getNodeManager("desired_builder");
> > // We get an iterator with all of the objects sorted NodeList
> > listaElementos = nodeManager.getList(null, "number", "DOWN");
> >
> > So just now we're retrieving all of the items, the most
> recent first.
>
> You'r not limiting the query-result now. It might be a
> problem when you get a zilliono f desired_builder object
> which you might not want to have in memory all.
>
You're 100% right, that's the reason of my question below about NodeQuery.
>
>
> > More questions:
> >
> > (a) Is the NodeQuery the preferred way of making a complex query to
> > the CMS storage engine?
>
> Yes. Or a 'Query' object for even more complex queries (which
> don't even return real nodes).
>
Ok. See my next message for a sample.
>
> > I'm thinking of retrieving at most N items of a given type
> that match
> > certain conditions (the limit is because of performance penalties,
> > we're using the remote cloud interface).
>
> That is indeed possible. You may use the functions from
> org.mmbase.bridge.util.Queries to manipulate the NodeQuery
> object which you will need then.
>
>
> > We may also need to retrieve mixed nodes of different types.
>
> You mean 'multilevel' results?
>
Yes.
>
> > (b) To retrieve an object -and- all of the objects related to it:
> >
> > NodeList related = element.getRelatedNodes("type_1");
> > NodeList related = element.getRelatedNodes("type_2");
> > And so on...
> >
> > Is this the preferred method to do it? Any other possibilities?
>
> All related nodes can simply be gotten with
> element.getRelatedNodes() IIRC.
>
Perfect, thanks a million Michiel.
>
> Michiel
>
> --
> Michiel Meeuwissen
> Mediacentrum 140 H'sum
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>
>
>
