public interface KerberosConstants {

    static final String KERBEROS_OID = "1.2.840.113554.1.2.2";
    static final String KERBEROS_VERSION = "5";

    static final String KERBEROS_AP_REQ = "14";

    static final int AF_INTERNET = 2;
    static final int AF_CHANET = 5;
    static final int AF_XNS = 6;
    static final int AF_ISO = 7;

    static final int AUTH_DATA_RELEVANT = 1;
    static final int AUTH_DATA_PAC = 128;

        }
        return OptionalEntity.empty();
    }

    public static OptionalEntity<RequestHeader> getRequestHeader(final CreateForm form) {
        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        final String username = systemHelper.getUsername();
        final long currentTime = systemHelper.getCurrentTimeAsLong();
        return getEntity(form, username, currentTime).map(entity -> {

    }

    public CurlRequest delete(final String path) {
        return request(Method.DELETE, path).header("Content-Type", "application/json");
    }

    public CurlRequest request(final Method method, final String path) {
        return request(new FesenRequest(new CurlRequest(method, null), nodeManager, path));
    }

    protected CurlRequest request(final CurlRequest request) {

         * JapaneseTokenizerFactory(args); // TODO japaneseTokenizerFactory.inform(new FilesystemResourceLoader());
         * tokenizerFactory = japaneseTokenizerFactory; } initialized = true;
         */
    }

    @Override
    public List<String> convert(final String text, final String field, final String... langs) throws IOException {

    @Override
    public boolean matches(final HttpServletRequest request) {
        final String servletPath = request.getServletPath();
        return servletPath.startsWith(pathPrefix);
    }

    @Override
    public void process(final HttpServletRequest request, final HttpServletResponse response, final FilterChain chain)
            throws IOException, ServletException {

    @Override
    protected void saveLoginHistory(final FessUser user, final FessUserBean userBean, final LoginSpecifiedOption option) {
        asyncManager.async(() -> {
            insertLogin(user);
        });
    }

    protected void insertLogin(final Object member) {
        // nothing
    }

    @Override
    protected void checkPermission(final LoginHandlingResource resource) throws LoginRequiredException {

    private final Analyzer analyzer;

    private final Settings settings;

    private final boolean expand;

    private long reloadInterval = 0;

    private final Environment env;

    private volatile long lastModified;

    private volatile long lastChecked;

    private volatile SynonymMap synonymMap;

        };
    }

    public interface Filter {
        QueryBuilder execute(final QueryContext context, final Query query, final float boost, final FilterChain chain);
    }

    public interface FilterChain {
        QueryBuilder execute(final QueryContext context, final Query query, final float boost);
    }

    }

    protected String getDisplayQuery(final SearchForm form, final List<Map<String, String>> labelTypeItems) {
        final StringBuilder buf = new StringBuilder(100);
        buf.append(form.q);
        if (!form.fields.isEmpty() && form.fields.containsKey(LABEL_FIELD)) {
            final String[] values = form.fields.get(LABEL_FIELD);
            final List<String> labelList = new ArrayList<>();

    @Override
    public SuggestWriterResult write(final Client client, final SuggestSettings settings, final String index, final SuggestItem[] items,
            final boolean update) {
        throw new UnsupportedOperationException("not yet.");
    }

    @Override
    public SuggestWriterResult delete(final Client client, final SuggestSettings settings, final String index, final String id) {