if(sSearch == null || sSearch.equals(""))
{
String filterAssignedRoleUsers = getRequest().getParameter("filterAssignedRoleUsers");
if(filterAssignedRoleUsers != null && filterAssignedRoleUsers.equalsIgnoreCase("true"))
{
InfoGlueRole infoGlueRole = RoleControllerProxy.getController().getRole(roleName);
List allInfogluePrincipals = UserControllerProxy.getController().getAllUsers();
List assignedInfogluePrincipals = infoGlueRole.getAutorizationModule().getRoleUsers(roleName);
List unassignedInfogluePrincipals = new ArrayList();
unassignedInfogluePrincipals.addAll(allInfogluePrincipals);
unassignedInfogluePrincipals.removeAll(assignedInfogluePrincipals);