protected volatile boolean isBind = false;

    /** The Fess configuration. */
    protected FessConfig fessConfig;

    /**
     * Default constructor.
     */
    public LdapManager() {
        // do nothing
    }

    /**
     * Initializes the LDAP manager.
     */
    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {

    /**
     * An item of a label type.
     */
    protected static class LabelTypeItem {
        /**
         * Default constructor.
         */
        public LabelTypeItem() {
            // do nothing
        }

        private String label;

        private String value;

        private String[] permissions;

        private String virtualHost;

        private Locale locale;

        // Spy on the connection to verify handshake() is called
        NtlmHttpURLConnection spiedConnection = spy(ntlmConnection);
        doNothing().when(spiedConnection).connect();
        // Mock the handshake process to do nothing complex
        mockResponse(HTTP_OK, "OK", null, null);

        // Act & Assert
        assertDoesNotThrow(() -> spiedConnection.getResponseCode());
        // Use reflection to verify handshake method is called

        fullWidthHalfWidth = Transliterator.getInstance("Fullwidth-Halfwidth");
        anyLower = Transliterator.getInstance("Any-Lower");
    }

    @Override
    public void init() throws IOException {
        // nothing
    }

    @Override
    public List<String> convert(final String text, final String field, final String... lang) {
        final List<String> list = new ArrayList<>();

    /**
     * Protected constructor to prevent instantiation of this utility class.
     * This class is designed to be used statically.
     */
    protected ResourceUtil() {
        // nothing
    }

    /**
     * Gets the HTTP URL for the OpenSearch (Fesen) server.
     * First checks for a system-configured search engine address,
     * then falls back to the URL configured in FessConfig.
     *

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