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From Christophe Lombart <>
Subject Re: Mapping of Items
Date Tue, 22 Mar 2005 23:27:27 GMT
Sandro Böhme wrote:

> Hello,
> as this is my first contribution to an open source project, please 
> tell me if I'am writing to much details in this list.
> Christophe Lombart wrote:
>> Sandro,
>> Did you check what Oliver did ? I'm working with him in order to see 
> Yes I did, but according to the request of Oliver, my email was just a 
> first draft of the proposal.
> I looked especially at JcrNodeObjectValueConverter. It looks good, but 
> I would like to be more type safe. I think this would make it easier 
> to browse through the content (e.g. with the Day's Content Explorer) 
> and maybe to work with the content (setProperty, getProperty).
> BTW: After I checked it again today I think you are right, the Struts 
> bean introspection is not neccessary, the java.bean.* tools should be 
> fine.

or a framework like should be also interesting.

>> what we can do together. I hope to make a proposal to this mailing asap.
>> Your ideas are interesting and we are working in the same way. If you 
>> have not a lot of time, please check what Oliver did and give us your 
>> point of view.
>> Giving your own point of view is already a great contribution.
>> What about the JCR node types ? Node type management seems for myself 
>> the most unclear area when we are speaking about mapping java beans 
>> to a JCR repo.
> Does node type management mean for you to maintain the mapping between 
> the two structures (use case e)? If yes, at the moment I don't have an 
> idea how to handle that, because I think it is not an easy part. This 
> is why I would think about it when I have done some basic work. As a 
> pragmatic solution maybe we can do the maintenance of the mapping 
> without an automatism at the first step.
>> It should be nice to give some flexibilty : either the object gragh 
>> is serialised in a unstructurred set of nodes or is serialised by 
>> following mapping rules defined in a file (something like in ORM 
>> tools : OJB, ....)
>> What do you think about that ?
> As I have no idea yet what the advantage of the mapping rules is, I 
> would vote for unstructured nodes.

It just an idea :-)  for this interesting brainstorming.
Well, in a descriptor it should be possible to map each java bean
properties to nodes in the repo
                      <attribute name="..."    .... />

                      <associaction name="documents" ..../>
use nt:unstructured with reflection but in a such case, the repo cannot
check if it is a valid content type.

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