findBy methods on the home interface should return either the remote interface
or a Collection of remote interfaces. So just make findByParent return a
collection of categories. So your code would look something like...
InitialContext context = new InitialContext();
Object obj = context.lookup("java:comp/env/ejb/Category");
CategoryHome ch = (CategoryHome)PortableRemoteObject.narrow(obj, CategoryHome.class);
Collection col = ch.findByParent("Furniture");
Iterator i = col.iterator();
while (i.hasNext())
{
Category cat = (Category)i.next();
... do stuff ...
}
-t
On Tue, Sep 05, 2000 at 02:04:37PM -0400, Rhodes, Phillip C. wrote:
> I have a Entity bean called "CategoryBean" that is recursive. Categories
> can have children categories, and those categories can have children, etc.
> Example:
>
> Furniture
> Chair
> Couch
> Bedding
> Sheets
> Blankets
>
> My ejb "CategoryBean" needs to get its children. For example, user clicks
> on category, need to show sub-categories. I created a method called
> getChildCategories() in my CategoryBean object. The method
> getChildCategories() does the lookup on the home object and calls the
> findByParent(String categoryId) finder on the home object.
>
> My question is, is this indirection necessary? Why would I need my instance
> of an EJB to look up another (possible its own) reference to lookup its
> children?
>
> Does anyone have example of parent/child relationship as entity bean?
>
> Thanks!
>
>
> public Enumeration getChildCategories() throws RemoteException {
> CategoryHome home = null;
> try {
> Context initCtx = new InitialContext(ctx.getEnvironment());
>
> home = (CategoryHome) initCtx.findByParent(categoryId);
>
> } catch (Exception e) {
> throw new ServerException("Lookup failed",e);
> }
> }
>
>
> Phillip Rhodes
> [EMAIL PROTECTED]
> Alcoa eCommerce
> https://www.ALCOADIRECT.COM
> 826B Two Allegheny Center Pittsburgh, PA 15212
> (412) 553-4900 (phone) (412) 553-2484 (fax)
>
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--
Tony Abbott [EMAIL PROTECTED]
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