Having not used the Castor source generator before who are the
developers wrapped? Is the Developers.java file an extension of a
vector, collection, something else? If so this could be a fairly
simple problem to solve.
On Wed, 13 Oct 2004 21:28:27 +0800, Ng Keng Yap <[EMAIL PROTECTED]> wrote:
> Dear all gurus in this group,
>
> I honestly seeking for help in helping solving this problem. Please refer to
> the below scenario, any of you have a good suggestion?
>
> Is my question too simple or naive? But i am really helpless. For the whole
> week, i spent day and night referring to the manual and search in google. I
> really had a sleepless week. Anyway, I dont think Castor is such difficult
> as it should simplify works, just feel that something is missing...
>
> I would appreciate for your help.
>
> Thanks.
>
> Cheers,
> Ng Keng Yap
>
> -------Original Message-------
>
> From: Ng Keng Yap
> Date: 13 Oktober 2004 20:23:30
> To: [EMAIL PROTECTED]
> Subject: My Castor Usage
>
> Dear all,
>
> I between the questions and answer regarding the OR Mapping, I think it is
> necessary for me to tell you the scenario...
>
> I am in the midst of developing a tool that can edit XML data, and load the
> XML data to the relational database. I find that Castor has the capability
> to cater XML (Castor XML) and relational database (Castor JDO). To date, i
> have already successfully generated java objects using the source generator
> that Castor provides. My tool will load the XML data to the java objects and
> to be loaded to the relational database using JDO.create(rootElementObject)
> to the database.
>
> Here the problem arise. I notice that I dont need to use XML to Java mapping
> but I think I still need the OR mapping right? I use the third party tool
> (JDOMapper) in helping me to simplify the mapping. However, when it comes to
> a relation shown below, I can't handle it with castor although with the help
> of the myapp example that show 1:N, N:1 and M:N cardinalities.
>
> <project id="id">
> <name>Project A</name>
> <developers>
> <developer name="id">
> <name>Ng Keng Yap</name>
> <email>[EMAIL PROTECTED]</email>
>
>
> </developer>
> <developers>
> </project>
>
> In the above sample xml database, we can see there will be 3 java objects to
> be created by the source generator, namely: project.java, developer.java and
> developers.java
>
> In fact, developers.java is the wrapper of developer collection. Developers
> java will have getter and setter for developer in array. Here is the problem
> how can I map this to the database as:
>
> project(id, name);
> developer(id, project_id, name, email)
>
> the relationship between project:developer is 1:N.
>
> Can anybody here tell me how to do this in JDO? What is the mapping then?
>
> THANKS for your patient in reading thru this long-winded email.
>
> Best regards,
> Ng Keng Yap
>
>
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