Re: How to populate a map of lists in an action form?

[Rick Reumann]

Daniel's question still has me perplexed? I'm still stumped on how to 
write the inputs for html and the proper ActionForm methods that would 
accomodate a situation where you needed to update Maps or Lists that are 
nested deeply. I understand how to do it when you have access methods to 
the Lists that are nested with beans - for example you have Company bean 
that has getDepartments which returns a list of Department beans and 
each dept bean has getEmployees. I can handle the above fine and it's 
how I typically orgainize by data. I'm still confused though how you 
handle a situation where someone simply added Lists to other Lists and 
you need to update the contents of the nested information.

For exmaple:
List bigList = new ArrayList();
List companiesList = new ArrayList();
List employees = new ArrayList();
employees.add(new Employee(...));
employees.add(new Employee(...));
employees.add(new Employee(...));
companiesList.add( employees )
List employees2 = new ArrayList();
employees2.add(new Employee(...));
employees2.add(new Employee(...));
employees2.add(new Employee(...));
companiesList.add( employees2 )
//do above for another companiesList2
bigList.add( companiesList1 );
bigList.add( companiesList2 );
How do you set up an input box to handle updating an Employee in a 
Company in the masterList

testForm.bigList[1][2][0].lastName
//2nd company in bigList, 3rd list of employees, 1st employee
Daniel Lobo wrote the following on 5/3/2005 6:19 AM:
Hi,
I have an action form with a map that can be accessed with getters and 
setters. That map holds lists of elements. The problem is how to 
populate that lists from the html form . I've tried with:

<input name="elementsMap(0).[0]" value="foo">
and
<input name="elementsMap(0)[0]" value="foo">
but doesn't work.
However, i've implemented a new class child of ArrayList that adds this 
two methods:

   public List getList()
   {
       return this;
   }
     public void setList(List list)
   {
       clear();
       addAll(list);
   }
And using this class in the map I can do from javascript:
<input name="elementsMap(0).list[0]" value="foo">
And the population of the ActionForm works properly. żDoes somebody know 
how to fix this problem without the use of this two "ugly" methods?

Thanks.
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