<rich:listShuttle> Validator -> How to use it?

[thinkpad2]

Hi guys.

I am just trying to use a listShuttle. There should be any items in the targetBox, so I first used targetRequired="true". This option does not work. I do want to write a validator, which checks if there are some items in the target box. A standard Validator has following method:

public void validate(FacesContext arg0, UIComponent arg1, Object arg2)

Normally I do cast arg2 for Example to String and do check the value. But how do I get the targetList within this Validator and what kind of List does we have in that case?

[thinkpad2]

The solution is:

Object[] list = (Object[]) arg2;
 List<E> target = (ArrayList<E>) list[1];

With list[0] you will get the source list, with list[1] the target list.