* @return ActionResponse containing the thumbnail image or 404 if not found
     */
    @Execute
    public ActionResponse index(final ThumbnailForm form) {
        validate(form, messages -> {}, () -> asHtml(virtualHost(path_Error_ErrorJsp)));
        if (isLoginRequired()) {
            return redirectToLogin();
        }

        final Map<String, Object> doc =

            break;
        }
        return OptionalEntity.empty();
    }

    private HtmlResponse asListHtml() {
        return asHtml(path_AdminSearchlist_AdminSearchlistJsp);
    }

    private HtmlResponse asEditHtml() {
        return asHtml(path_AdminSearchlist_AdminSearchlistEditJsp);
    }

    /**

     *
     * @return HTML response for login page or redirect to admin interface
     */
    protected HtmlResponse getHtmlResponse() {
        return getUserBean().map(this::redirectByUser).orElse(asHtml(virtualHost(path_Login_IndexJsp)));
    }

    /**
     * Redirects an authenticated user to the appropriate admin interface based on their roles.

     * @return ActionResponse containing the cached document content or error redirect
     */
    @Execute
    public ActionResponse index(final CacheForm form) {
        validate(form, messages -> {}, () -> asHtml(virtualHost(path_Error_ErrorJsp)));
        if (isLoginRequired()) {
            return redirectToLogin();
        }

        Map<String, Object> doc = null;
        try {

     * @throws IOException if an I/O error occurs during content retrieval
     */
    @Execute
    public ActionResponse index(final GoForm form) throws IOException {
        validate(form, messages -> {}, () -> asHtml(virtualHost(path_Error_ErrorJsp)));
        if (isLoginRequired()) {
            return redirectToLogin();
        }

        Map<String, Object> doc = null;
        try {
            doc = searchHelper

     */
    private HtmlResponse asListHtml(final Runnable runnable) {
        if (runnable != null) {
            runnable.run();
        }
        return asHtml(path_AdminSereq_AdminSereqJsp).useForm(UploadForm.class);
    }

        }
        return new String(Base64.getUrlDecoder().decode(id.getBytes(Constants.UTF_8_CHARSET)), Constants.UTF_8_CHARSET);
    }

    private HtmlResponse asListHtml(final String path) {
        return asHtml(path_AdminStorage_AdminStorageJsp).useForm(ItemForm.class).renderWith(data -> {
            RenderDataUtil.register(data, "endpoint", fessConfig.getStorageEndpoint());

     *
     * @return HTML response for the system info page
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse index() {
        return asHtml(path_AdminSysteminfo_AdminSysteminfoJsp).renderWith(data -> {
            registerEnvItems(data);
            registerPropItems(data);
            registerFessPropItems(data);
            registerBugReportItems(data);

            map.put("id", name);
            map.put("name", name);
            return map;
        }).collect(Collectors.toList()));
    }

    private HtmlResponse asListHtml() {
        return asHtml(path_AdminBackup_AdminBackupJsp).useForm(UploadForm.class)
                .renderWith(data -> RenderDataUtil.register(data, "backupItems", getBackupItems()));
    }

    private void deleteTempFile(final File tempFile) {

    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse index() {
        saveToken();
        return asIndexHtml();
    }

    private HtmlResponse asIndexHtml() {
        return asHtml(path_AdminMaintenance_AdminMaintenanceJsp).useForm(ActionForm.class, op -> op.setup(f -> {
            f.replaceAliases = Constants.ON;
            f.resetDictionaries = null;
        }));
    }

    /**