/**
  * Move an IP restriction up in priority by swapping the priority with the restriction above the
  * one selected.
  *
  * @param mapping mapping
  * @param form form
  * @param request request
  * @param response response
  * @return ActionForward forward
  * @throws Exception on any error
  */
 public ActionForward moveUp(
     ActionMapping mapping,
     ActionForm form,
     HttpServletRequest request,
     HttpServletResponse response)
     throws Exception {
   PolicyUtil.checkPermission(
       PolicyConstants.IP_RESTRICTIONS_RESOURCE_TYPE, PolicyConstants.PERM_EDIT, request);
   int id = Integer.parseInt(request.getParameter("id"));
   SystemDatabase database = SystemDatabaseFactory.getInstance();
   IpRestriction restriction1 = database.getIpRestriction(id);
   String ipAddress = restriction1.getAddress();
   String ipPermission = restriction1.getAllowed() ? "Allowed" : "Denied";
   try {
     List<IpRestriction> restrictions = Arrays.asList(database.getIpRestrictions());
     database.swapIpRestrictions(
         restriction1, restrictions.get(restrictions.indexOf(restriction1) - 1));
     fireCoreEvent(
         request,
         CoreEventConstants.IP_RESTRICTION_MOVE_UP,
         ipAddress,
         ipPermission,
         CoreEvent.STATE_SUCCESSFUL);
   } catch (Exception e) {
     fireCoreEvent(
         request,
         CoreEventConstants.IP_RESTRICTION_MOVE_UP,
         ipAddress,
         ipPermission,
         CoreEvent.STATE_UNSUCCESSFUL);
     throw e;
   }
   return mapping.findForward("refresh");
 }
  private void deleteIpRestriction(HttpServletRequest request, IpRestriction restriction)
      throws Exception {
    String ipAddress = restriction.getAddress();
    String ipPermission = restriction.getAllowed() ? "Allowed" : "Denied";

    try {
      SystemDatabase database = SystemDatabaseFactory.getInstance();
      database.removeIpRestriction(restriction.getID());
      fireCoreEvent(
          request,
          CoreEventConstants.DELETE_IP_RESTRICTION,
          ipAddress,
          ipPermission,
          CoreEvent.STATE_SUCCESSFUL);
    } catch (Exception e) {
      fireCoreEvent(
          request,
          CoreEventConstants.DELETE_IP_RESTRICTION,
          ipAddress,
          ipPermission,
          CoreEvent.STATE_UNSUCCESSFUL);
      throw e;
    }
  }