ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;

            @Override
            public Integer getPasswordMinLengthAsInteger() {
                return 8;
            }

            @Override
            public boolean isPasswordRequireUppercase() {
                return false;
            }

        switch (errorKey) {
        case "errors.password_length":
            messages.addErrorsPasswordLength(GLOBAL, String.valueOf(ComponentUtil.getFessConfig().getPasswordMinLengthAsInteger()));
            break;
        case "errors.password_no_uppercase":
            messages.addErrorsPasswordNoUppercase(GLOBAL);
            break;
        case "errors.password_no_lowercase":

        switch (errorKey) {
        case "errors.password_length":
            messages.addErrorsPasswordLength(GLOBAL, String.valueOf(ComponentUtil.getFessConfig().getPasswordMinLengthAsInteger()));
            break;
        case "errors.password_no_uppercase":
            messages.addErrorsPasswordNoUppercase(GLOBAL);
            break;
        case "errors.password_no_lowercase":

        switch (errorKey) {
        case "errors.password_length":
            messages.addErrorsPasswordLength("password", String.valueOf(ComponentUtil.getFessConfig().getPasswordMinLengthAsInteger()));
            break;
        case "errors.password_no_uppercase":
            messages.addErrorsPasswordNoUppercase("password");
            break;
        case "errors.password_no_lowercase":

        return !split(getPasswordInvalidAdminPasswords(), "\n")
                .get(stream -> stream.map(String::trim).filter(StringUtil::isNotEmpty).anyMatch(s -> s.equals(password)));
    }

    Integer getPasswordMinLengthAsInteger();

    boolean isPasswordRequireUppercase();

    boolean isPasswordRequireLowercase();

    boolean isPasswordRequireDigit();

    boolean isPasswordRequireSpecialChar();

     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not integer.
     */
    Integer getPasswordMinLengthAsInteger();

    /**
     * Get the value for the key 'password.require.uppercase'. <br>
     * The value is, e.g. false <br>
     * comment: Require uppercase letters in password.