/**
   * Executes a remove member action.
   *
   * @param request HTTP request.
   * @param response HTTP response.
   * @param context request context
   * @throws Exception if an exception occurs
   */
  protected void executeRemoveMember(
      HttpServletRequest request, HttpServletResponse response, RequestContext context)
      throws Exception {
    try {
      String[] parts = request.getRequestURI().toString().split("/");
      String member = Val.chkStr(request.getParameter("member"));
      String attempt = Val.chkStr(request.getParameter("attempt"));
      IdentityAdapter idAdapter = context.newIdentityAdapter();
      User user = new User();
      user.setDistinguishedName(member);
      idAdapter.readUserProfile(user);
      if (parts.length > 0) {
        String groupIdentifier = URLDecoder.decode(parts[5].trim(), "UTF-8");
        if (!groupIdentifier.endsWith(groupDIT)) {
          IdentityConfiguration idConfig = context.getIdentityConfiguration();
          Roles configuredRoles = idConfig.getConfiguredRoles();
          Role roleRegistered = configuredRoles.get(groupIdentifier);
          groupIdentifier = roleRegistered.getDistinguishedName();
        }
        boolean isSelf = checkSelf(context, member);
        if ((isSelf && attempt.equals("2")) || !isSelf) {

          boolean checkGroupConfigured = true;
          if (checkIfAllowConfigured(context)) {
            checkGroupConfigured = checkIfConfigured(context, groupIdentifier);
          }
          boolean isAllowedToManage = true;
          isAllowedToManage = checkIfAllowedToManage(context, groupIdentifier);
          if (checkGroupConfigured) {
            if (isAllowedToManage) {
              idAdapter.removeUserFromGroup(user, groupIdentifier);
              response
                  .getWriter()
                  .write(msgBroker.retrieveMessage("catalog.identity.removeRole.success"));
            } else {
              response.sendError(
                  HttpServletResponse.SC_BAD_REQUEST,
                  "{ \"error\":\""
                      + groupIdentifier
                      + " is not allowed to be managed in geoportal. \"}");
              return;
            }
          } else {
            response.sendError(
                HttpServletResponse.SC_BAD_REQUEST,
                "{ \"error\":\"" + groupIdentifier + " is not configured in geoportal. \"}");
            return;
          }

        } else {
          response.getWriter().write("prompt");
        }
      }
    } finally {
    }
  }
 /**
  * Builds a collection of configured roles in Geoportal (gpt.xml).
  *
  * @param context the current request context (contains the active user)
  * @return the collection of roles
  */
 protected Roles buildSelectableRoles(RequestContext context) {
   IdentityConfiguration idConfig = context.getIdentityConfiguration();
   Roles selectableRoles = idConfig.getConfiguredRoles();
   return selectableRoles;
 }