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[Texo] Lazy Loading with Texo [message #1281170]

Mon, 31 March 2014 13:14

Bastian Wagenfeld

Messages: 183
Registered: January 2013

Senior Member

Hi,

I've got a question regarding lazy loading or better selective loading with Texo. Therefore I'll create a little example:

I want to a list of objects (ObjectA) consisting of primitive types and other object references.

ObjectA
 -- name : String
 -- description : String
 -- ref : ObjectB (Reference)
 -- list : List<ObjectC> (Containment list)

Is it possible to load everything in this object besides the containment list (name, description and ref)? That would be great.

Or is it otherwise possible to query those other attributes via the ObjectStore? The query-method won't work, since it only returns whole EObjects.

I would be very happy for any hint!
Bastian

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Re: [Texo] Lazy Loading with Texo [message #1281810 is a reply to message #1281170]

Tue, 01 April 2014 11:40

Martin Taal

Messages: 5468
Registered: July 2009

Senior Member

Hi Bastian,
Hmm not now, you can check the internals of the EObjectStore, it basically calls the json webservice, the json
webservice supports what you want:
https://wiki.eclipse.org/Texo/JSON_REST_Web_Services#Query_for_multiple_values

So you can force a load by querying for additional referenced data.

I propose the following, can you subclass/extend the EObjectStore with your code and then if you want (I hope!) attach
it to a bugzilla? Then I can add this to the EObjectStore implementation.

Or maybe what you mean is a list of efeature names which are to be loaded and returned as part of the json? Also for
non-containment references.

gr. Martin

On 03/31/2014 03:14 PM, Bastian Wagenfeld wrote:
> Hi,
>
> I've got a question regarding lazy loading or better selective loading with Texo. Therefore I'll create a little example:
>
> I want to a list of objects (ObjectA) consisting of primitive types and other object references.
>
> ObjectA
> -- name : String
> -- description : String
> -- ref : ObjectB (Reference)
> -- list : List<ObjectC> (Containment list)
>
> Is it possible to load everything in this object besides the containment list (name, description and ref)? That would be
> great.
> Or is it otherwise possible to query those other attributes via the ObjectStore? The query-method won't work, since it
> only returns whole EObjects.
>
> I would be very happy for any hint!
> Bastian

--

With Regards, Martin Taal

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Mail: mtaal@xxxxxxxx - mtaal@xxxxxxxx
Web: www.springsite.com - www.elver.org

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Re: [Texo] Lazy Loading with Texo [message #1282396 is a reply to message #1281810]

Wed, 02 April 2014 08:31

Bastian Wagenfeld

Messages: 183
Registered: January 2013

Senior Member

Hi Martin,

thanks for that hint. I tried to query via the json service and it worked, but when I try to convert the json to a ResponseType I get a ClassNotFoundException. The problem seems to that the whole Request/Response-model isn't exported by its plugin.
That's not a big deal, since I can "skip" this part of the JSON and go for the data itself, but it would be nicer I think. But this is just for info.

Best regards and thank you for your answer!
Bastian

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