*
     * @param form the error form containing error information
     * @return HTML response for the bad request error page
     */
    @Execute
    public HtmlResponse index(final ErrorForm form) {
        return asHtml(virtualHost(path_Error_BadRequestJsp));
    }

     * @return The HTML response for the index page.
     */
    @Execute
    public HtmlResponse index() {
        if (isLoginRequired()) {
            return redirectToLogin();
        }

        return asHtml(virtualHost(path_IndexJsp)).useForm(SearchForm.class, op -> {
            op.setup(form -> {
                buildFormParams(form);
            });
        }).renderWith(data -> {
            buildInitParams();

    /**
     * Show the index page.
     * @return The HTML response.
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse index() {
        searchEngineApiManager.saveToken();
        return asHtml(path_AdminDashboard_AdminDashboardJsp).renderWith(data -> {
            RenderDataUtil.register(data, "serverPath", searchEngineApiManager.getServerPath());
        });
    }

     */
    public static boolean isLogFilename(final String name) {
        return name.endsWith(".log") || name.endsWith(".log.gz");
    }

    private HtmlResponse asIndexHtml() {
        return asHtml(path_AdminLog_AdminLogJsp).renderWith(data -> {
            RenderDataUtil.register(data, "logFileItems", getLogFileItems());
        });
    }

     */
    @Execute
    public HtmlResponse index() {
        if (isLoginRequired()) {
            return redirectToLogin();
        }

        return asHtml(virtualHost(path_HelpJsp)).useForm(SearchForm.class, op -> {
            op.setup(form -> {
                buildFormParams(form);
            });
        }).renderWith(data -> {
            buildInitParams();

            break;
        }
        return OptionalEntity.empty();
    }

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

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

    /**

     * @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

     * @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 =

        });
    }

    /**
     * Returns the index HTML response.
     *
     * @return the HTML response
     */
    protected HtmlResponse asIndexHtml() {
        return getUserBean().map(u -> asHtml(virtualHost(path_Profile_IndexJsp)).useForm(ProfileForm.class))
                .orElseGet(() -> redirect(LoginAction.class));
    }

    /**
     * Show the index page.
     * @return The HTML response.
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse index() {
        return asHtml(path_AdminDict_AdminDictJsp).renderWith(data -> {
            final DictionaryFile<? extends DictionaryItem>[] dictFiles = dictionaryManager.getDictionaryFiles();
            RenderDataUtil.register(data, "dictFiles", dictFiles);