gistfile1.txt

public void processEvent(SystemEvent event) throws AbortProcessingException {

        if (event instanceof PostRestoreStateEvent) {
            FacesContext.getCurrentInstance().getApplication().subscribeToEvent(PreRenderViewEvent.class, this);
            preDecode(getFacesContext());
        }

        if (event instanceof PreRenderViewEvent) {
            FacesContext.getCurrentInstance().getApplication().unsubscribeFromEvent(PreRenderViewEvent.class, this);
            preEncodeBegin(getFacesContext());
        }
    }