fessLoginAssist.findLoginUser(new LocalUserCredential(getUserBean().get().getUserId(), form.oldPassword)).orElseGet(() -> {
            throwValidationError(messages -> {
                messages.addErrorsNoUserForChangingPassword(GLOBAL);
            }, validationErrorLambda);
            return null;
        });
    }

    protected HtmlResponse asIndexHtml() {

            form.clearSecurityInfo();
            return getUserBean().map(u -> asHtml(virtualHost(path_Login_NewpasswordJsp)).useForm(PasswordForm.class))
                    .orElseGet(() -> redirect(LoginAction.class));
        };
        validatePasswordForm(form, toIndexPage);
        final String username = getUserBean().map(FessUserBean::getUserId).get();
        try {

    //                                                                           =========
    @Override
    protected OptionalThing<FessUserBean> getUserBean() { // to return as concrete class
        return fessLoginAssist.getSavedUserBean();
    }

    @Override
    protected String myAppType() { // for framework
        return APP_TYPE;
    }

    @Override
    protected void setupHtmlData(final ActionRuntime runtime) {
        super.setupHtmlData(runtime);
        systemHelper.setupAdminHtmlData(this, runtime);

        final Boolean editable = getUserBean()
                .map(user -> user.hasRoles(fessConfig.getAuthenticationAdminRolesAsArray()) || user.hasRole(getActionRole())).orElse(false);
        runtime.registerData("editable", editable);

import org.lastaflute.web.response.HtmlResponse;

public abstract class FessLoginAction extends FessSearchAction {
    protected HtmlResponse getHtmlResponse() {
        return getUserBean().map(this::redirectByUser).orElse(asHtml(virtualHost(path_Login_IndexJsp)));
    }

    protected HtmlResponse redirectByUser(final FessUserBean user) {

    //                                                                      ==============

    @Execute
    public HtmlResponse index() {
        final OptionalThing<FessUserBean> userBean = getUserBean();
        activityHelper.logout(userBean);
        final String redirectUrl = userBean.map(user -> ComponentUtil.getSsoManager().logout(user)).orElse(null);
        fessLoginAssist.logout();

            return redirectToLogin();
        }

        Map<String, Object> doc = null;
        try {
            doc = searchHelper.getDocumentByDocId(form.docId, queryFieldConfig.getCacheResponseFields(), getUserBean()).orElse(null);
        } catch (final Exception e) {
            logger.warn("Failed to request: {}", form.docId, e);
        }
        if (doc == null) {

        if (!labelTypeItems.isEmpty() && !form.fields.containsKey(FessSearchAction.LABEL_FIELD)) {
            final String[] defaultLabelValues = fessConfig.getDefaultLabelValues(getUserBean());
            if (defaultLabelValues.length > 0) {
                form.fields.put(FessSearchAction.LABEL_FIELD, defaultLabelValues);
            }
        }

        if (isLoginRequired()) {
            return redirectToLogin();
        }

        final Map<String, Object> doc =
                searchHelper.getDocumentByDocId(form.docId, queryFieldConfig.getResponseFields(), getUserBean()).orElse(null);
        final String url = DocumentUtil.getValue(doc, fessConfig.getIndexFieldThumbnail(), String.class);
        if (StringUtil.isBlank(form.queryId) || StringUtil.isBlank(url) || !thumbnailSupport) {

        final User entity = userService.getUser(id).orElseGet(() -> {
            throwValidationErrorApi(messages -> messages.addErrorsCrudCouldNotFindCrudTable(GLOBAL, id));
            return null;
        });
        getUserBean().ifPresent(u -> {
            if (u.getFessUser() instanceof User && entity.getName().equals(u.getUserId())) {
                throwValidationErrorApi(messages -> messages.addErrorsCouldNotDeleteLoggedInUser(GLOBAL));