/**
   * Apply the 'search by role' filter to the lucene query string.
   *
   * @param parametersMap
   * @param filters
   */
  protected void buildSearchByRoleQuery(Map<String, String> parametersMap, List<String> filters) {
    SearchableRole role =
        SearchableRole.valueOf(getSearchParam(parametersMap, REQUEST_PARAMETERS.role.toString()));
    String userid = getSearchParam(parametersMap, REQUEST_PARAMETERS.userid.toString());
    AuthorizableManager authorizableManager = null;
    Session adminSession = null;
    try {
      adminSession = repository.loginAdministrative();
      authorizableManager = adminSession.getAuthorizableManager();
      Authorizable au = authorizableManager.findAuthorizable(userid);
      List<Authorizable> groups = AuthorizableUtil.getUserFacingGroups(au, authorizableManager);
      groups.add(au);

      List<String> groupStrs = new ArrayList<String>(groups.size());
      for (Authorizable memberAuthz : groups) {
        groupStrs.add(ClientUtils.escapeQueryChars(memberAuthz.getId()));
      }

      filters.add(String.format(ROLE_TEMPLATE, role.toString(), JOINER_OR.join(groupStrs)));
      adminSession.logout();
    } catch (ClientPoolException e) {
      throw new RuntimeException(e);
    } catch (StorageClientException e) {
      throw new RuntimeException(e);
    } catch (AccessDeniedException e) {
      throw new RuntimeException(e);
    } finally {
      SparseUtils.logoutQuietly(adminSession);
    }
  }