thanks
----- Original Message -----
From: "Thomas Mahler" <[EMAIL PROTECTED]>
To: "OJB Users List" <[EMAIL PROTECTED]>
Sent: Monday, June 02, 2003 4:38 PM
Subject: Re: Inheritance issue
> Hi Alen,
>
> You have to tell OJB that there is an inheritance hierarchy.
> You do it by defining extents.
> There is an example for this in repository_junit.xml.
> Have a look at definitions for classes Article, BookArticle, CdArticle.
>
> cheers,
> Thomas
>
> Alen Ribic wrote:
> > Hi all
> >
> > I have a bit of a problem with inheritance in my application when it
comes
> > to storing persistent objects using OJB.
> >
> > I am using Struts in combination with OJB.
> > What I have now is a JavaBean "User" and I have a direct subclass
> > "RegisterForm".
> > What I wanna do is use RegisterForm as my FormBean and at runtime I wish
to
> > reference a User type reference and store that in my db. So, I would
like to
> > reuse the setters/getters of my User bean where necessary for Struts
> > purpose. (Any form where user's setters/getters are needed)
> > My OJB XML repository contains mapping for User Bean to User relational
> > table.
> >
> > So, now the problem is as follows:
> >
> > ...
> > User user = null;
> > user = (User)request.getAttribute("registerForm");
> > ...
> > PersistenceBroker broker = null;
> > try {
> > broker = PersistenceBrokerFactory.
> > defaultPersistenceBroker();
> > broker.beginTransaction();
> > broker.store(user);
> > broker.commitTransaction();
> > } catch(Throwable exc) {
> > ...
> > }
> > ...
> >
> > In the above code snippet, "request.getAttribute("registerForm");",
returns
> > an instance of RegisterForm class. (Then I cast to User type...)
> > As soon as store(...) method is fired,
ClassNotPersistenceCapableException
> > is thrown indicating that za.co.alen.struts.RegisterForm class is not
found
> > in OJB Repository.
> >
> > I need OJB system to reference RegisterForm classes direct superclass,
in
> > this case User of course.
> >
> > Any help on how I can overcome this problem will be much appreciated.
> >
> > Thanks,
> > --Alen
> >
> >
> >
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> >
>
>
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