Don't know if I am on track here, Rick, but, if you get the FooBar
loaded, the following code should unload it and do it in reverse to load
it again:
public void do(FooBar outsideFooBar) {
FooBar insideFooBar;
// A. Wrap non-collection values into an appropriate list;
// B. Use this logic to repeat the above recursively.
Collection collection;
if((collection = outsideFooBar.getCollection()) != null) {
Iterator iter = collection.iterator();
while(iter.hasNext()) {
insideFooBar = (FooBar)iter.next();
do(insideFooBar);
}
}
}
Rick Reumann wrote:
This app I'm working on is sort of any odd beast. It's a case where
the resulting JSP is going to be built by generic beans that are
nested inside of the same type of generic bean etc. So for an example ...
class FooBar {
Collection fooBars;
Integer id;
String type;
String value;
//set/gets
}
So what happens is you can have Collections of these beans nested
serveral levels and you don't know before run-time how deep.
My form will need to display everything and capture any changes to the
'value' field.
So my ActionForm (in this example) would only have one main property:
private FooBar fooBar;
When the form submits it captures all the nested fooBar information.
The problem of course is making sure you don't get those nasty
BeanUtils index errors when the form submits.
Typically, for standard applications, I'd use ListUtils.lazyList for
my Collections. The problem, though, here is that you don't know how
deep the Collections go (without a call to the business layer).
The only way I've found to get this type of form to work is to give it
Session scope. Everything is fine then since it retains the initial
FooBar object placed in the form that is done in a 'setUp' or 'prep'
method before the form is displayed for the user.
Just wondering if there is another approach I could consider to tackle
this without using the Session. I think in this case the Session holds
the most promise.
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