The problem is the object model cannot be modified.
-----Message d'origine-----
De : Thomas Mahler [mailto:[EMAIL PROTECTED]
Envoye : mardi 13 janvier 2004 17:41
A : OJB Users List
Objet : Re: Problem using strongly typed collections
Hi Guilaume,
Guillaume Nodet wrote:
> I've got an object model with strongly typed collections:
>
> class A {
> private BList bs;
> public BList getBs();
> }
>
> class B {
> ...
> }
>
> class BList implements Collection {
> ...
> }
>
> When I store the object, everything is good, but when i read it later i've
> got an exception
> thrown from AbstractPersistentField.set when trying to set the B
collection,
> which is a
> ManageableCollection.
IMO the is caused by the fact that you Blist attribute is now filled
with a ManeageableCollection and not with BList!
You have to tell in the collection-descriptor that the "bs" attribute
must use a special collection-class="BList".
To make this work You BList must implement the interface
o.a.ojb.broker.ManageableCollection.
See tutorial 3 for more details.
> OJB was configured to use
> PersistentFieldDirectAccessImpl.
>
> So i tried with PersistentFieldIntrospectorImpl and adding a set method
> public void setBs(Collection list)
> but I've got the following exception:
> Can't get WriteMethod for property:bs in object:A
>
>
> Is there a way to store and read my collection without writing a custom
> PersistentField ?
>
IMO this is only a secondary error!
cheers,
thomas
> Guillaume Nodet
>
>
>
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