Re: Iterative Model

As a follow-up to what Diez says, here is something Diez actually sent me 
quite a while ago that I think might help...

ParentModel extends AbstractTemplateModel implements IterativeModel {

     ParentItem current;

     ParentItem getCurrent() {return current;}

     /* ... all the model-stuff */


     public void loadNext() {
         current = calcMyNextCurrentItem();
     }

}

ChildModel extends AbstractTemplateModel implements IterativeModel {

     public ChildModel(ParentModel); // Save the ref to ParentModel



     public void preIterate() {
         ParentItem pi = parentModel.getCurrent();
         childs = pi.getMyChildsAsList();
     }

}


Hope that helps.

This really does need to be in a FAQ of some sort.  Anyone want to start 
work on that?  It would also be nice to have a more automatic way for child 
models to interact with parent models more automatically.  I'm not saying I 
have something in mind.  It just seems this could be done in a more elegant 
way.


Jake

At 01:39 PM 3/15/2003 +0100, you wrote:
>Hi,
>
> > I am trying to figure out how to use the current Iterative Model to do
> > this. Has anyone come across similar problem ? Any insight regarding this
> > would be really helpful.
>
>Search the mail archives for parent and child iteratice models. The basic 
>idea
>is to have two models, where the outer one initializes the inner one when
>iterateNext is called - or the inner one queries the outter one about its
>parent object in the preIterate method.
>
>Diez
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