//                                                                           =========
    private static final UserDbm _instance = new UserDbm();

    private UserDbm() {
    }

    public static UserDbm getInstance() {
        return _instance;
    }

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

    public String asEsIndexType() {
        return "user";
    }

    @Override
    public String asEsSearchType() {
        return "user";
    }

    @Override
    public UserDbm asDBMeta() {
        return UserDbm.getInstance();
    }

    @Override
    protected <RESULT extends User> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {

    //                                                                             Control
    //                                                                             =======
    @Override
    public UserDbm asDBMeta() {
        return UserDbm.getInstance();
    }

    @Override
    public String asTableDbName() {
        return "user";
    }

    @Override
    public boolean hasSpecifiedColumn() {

     * Converts a user key to a typed user ID.
     * In this implementation, returns the user key as-is.
     *
     * @param userKey the user key to convert
     * @return the typed user ID
     */
    @Override
    protected String toTypedUserId(final String userKey) {
        return userKey;
    }

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

        final String userDN = fessConfig.getLdapAdminUserSecurityPrincipal(user.getName());
        // attributes
        search(fessConfig.getLdapAdminUserBaseDn(), fessConfig.getLdapAdminUserFilter(user.getName()), null, adminEnv, result -> {
            if (!result.isEmpty()) {
                modifyUserAttributes(user, adminEnv, userDN, result);
            } else {

        // WEB-INF/classes
        buf.append("WEB-INF");
        buf.append(File.separator);
        buf.append("classes");
        // target/classes
        final String userDir = System.getProperty("user.dir");
        final File targetDir = new File(userDir, "target");
        final File targetClassesDir = new File(targetDir, "classes");
        if (targetClassesDir.isDirectory()) {
            buf.append(cpSeparator);

        // WEB-INF/classes
        buf.append("WEB-INF");
        buf.append(File.separator);
        buf.append("classes");
        // target/classes
        final String userDir = System.getProperty("user.dir");
        final File targetDir = new File(userDir, "target");
        final File targetClassesDir = new File(targetDir, "classes");
        if (targetClassesDir.isDirectory()) {
            buf.append(cpSeparator);

    //                                                                             DB Meta
    //                                                                             =======
    @Override
    public UserDbm asDBMeta() {
        return UserDbm.getInstance();
    }

    @Override
    public String asTableDbName() {
        return "user";
    }

        // WEB-INF/classes
        buf.append("WEB-INF");
        buf.append(File.separator);
        buf.append("classes");
        // target/classes
        final String userDir = System.getProperty("user.dir");
        final File targetDir = new File(userDir, "target");
        final File targetClassesDir = new File(targetDir, "classes");
        if (targetClassesDir.isDirectory()) {
            buf.append(cpSeparator);

        final String value = System.getProperty("fess.log.path");
        if (value != null) {
            return value;
        }
        final String userDir = System.getProperty("user.dir");
        final File targetDir = new File(userDir, "target");
        return new File(targetDir, "logs").getAbsolutePath();
    }

    /**
     * Encodes a URL path for filtering.
     *