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From "Martin Taal (JIRA)" <j...@apache.org>
Subject [jira] Commented: (OJB-20) Allow the use of collection-factory
Date Mon, 25 Apr 2005 11:05:27 GMT
     [ http://issues.apache.org/jira/browse/OJB-20?page=comments#action_63645 ]
Martin Taal commented on OJB-20:

Hi Thomas,
Thanks alot, 
I checked and it works for my testcases. I noted that the collection-factory can not be specified
on the collection-descriptor but had to be specified globally, or did I miss something? 
What I did is set my collection factory on global level (ojb.properties) and forward all non-emf
objects to the CollectionFactoryDefaultImpl. This works fine also.

Btw I will also try to find out if I can integrate emf collections with ojb 1.0.3 using a
specific persistent field implementation (but this takes some time to research/test). 

gr. Martin

> Allow the use of collection-factory
> -----------------------------------
>          Key: OJB-20
>          URL: http://issues.apache.org/jira/browse/OJB-20
>      Project: OJB
>         Type: New Feature
>   Components: PB-API
>     Versions: 1.1 CVS
>     Reporter: Martin Taal
>     Assignee: Thomas Dudziak
>  Attachments: patch_coll_factory.txt
> Hi,
> This is a request for allowing a user to specify a collection-factory for a collection-descriptor.
The collection factory is used to create collection instances when the owner of the collection
is read from the database. 
> In my usecase I need to pass runtime information to the constructor of the collection
(i.e. the collection needs its owning object). This is for example for handling a notification
infrastructure in which changes to the collection are broadcasted to listeners who need to
know from which object the notification comes. The current collection-class implementation
in ojb 'only' supports zero-argument constructors which do not handle my usecase.
> I have made an implementation of the collection-factory in ojb which I will try to attach
(as a patch) to this request or otherwise send to the ojb-dev mailing list. If I can be of
help to get this implemented then please let me know. 
> gr. Martin Taal

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