Hi!
On 12/29/05, Rick Reumann <[EMAIL PROTECTED]> wrote:
>
> I'm still stumped with the best way to handle cases where your nesting
> goes a bit deeper than just into one list in your ActionForm (and you
> want to use Request scope for your ActionForm). Yes, I know many of you
> state that it means you have a complicated UI, but I've had numerous
> questions come to me personally about master-detail forms where you do
> edit several records from a single form, so I'm going to write up a
> tutorial on it.
>
> For example lets assume you want to edit on a single JSP a list of
> Employees - where you want to be able to edit their "name" AND "phone
> numbers":
>
> (imagine data below in editable text fields)
>
> Employee Phone Numbers
> -------- -------------
> John Doe 888-888-8888
> 888-111-1111
> 222-222-2222
>
> Bill Boo 111-111-3333
> 444-333-3333
>
> [Submit Button]
>
>
> So we might have a List of Employee objects where Employee has:
> String name;
> List phoneNumbers;
>
> And our ActionForm bean thus has a single property:
> List employees;
>
> Here's the problem.... in the reset method you can set a LazyList to
> wrap the Employees but there is still the problem of the internal List
> of phoneNumbers in each Employee.
>
> I was trying:
>
> public void reset(ActionMapping actionMapping, HttpServletRequest
> httpServletRequest) {
>
> employees = ListUtils.lazyList(new java.util.ArrayList(), new
> Factory() {
> public Object create() {
> return buildEmployee();
> }
> });
> }
>
> private Employee buildEmployee() {
> //This really isn't working,
> //I'll still get an index out of bounds, when
> //trying to set an index of the phoneNumbers list
> Employee emp = new Employee();
> List phoneNumbers = ListUtils.lazyList(new java.util.ArrayList(),
> new Factory() {
> public Object create() {
> return new String();
> }
> });
> emp.setPhoneNumbers( phoneNumbers );
> return emp;
>
> }
I never used something like this before but I don't understand why wouldn't
this actually work if you have a nested LazyList.
Can we see a stack trace please?
Tamas
