How To Control Af:panelspliter At Runtime

Question

I have a panel splitter layout component on my page and i want to enable/disable this splitter at run time from within a managed bean
In my managed bean I made this method
public class ManageUI {
    private String enableSplit;
    private String discloseSplit;
    private RichPanelSplitter spliter;
   private String viewId;
    public  void doDiscloseSplit(PhaseEvent phaseEvent){      
          String currViewId = phaseEvent.getFacesContext().getViewRoot().getViewId();
          System.out.println("current view id="+currViewId);
          if (!currViewId.equals(this.getViewId())) {               
            spliter.setDisabled(false);
            System.out.println("spliter is now false");
....the method throw runtime exception :
current view id=/home
<UIViewRoot> <notifyPhaseListeners> Exception
javax.el.ELException: java.lang.NullPointerException

Answer 1

Why are you doing this in a phase listener?
Why not something like:
public boolean isSplitterDisabled()
  return something;
}And bind the disabled property of the splitter to that?
To help you find which line is throwing the NPE, you can use the debugger.
John