langFields = fessConfig.getIndexerLanguageFieldsAsArray();
        supportedLanguages = fessConfig.getSupportedLanguagesAsArray();
        maxTextLength = fessConfig.getIndexerLanguageDetectLengthAsInteger();
    }

    public void updateDocument(final Map<String, Object> doc) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();

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

    /**
     * Get the value for the key 'indexer.max.result.window.size'. <br>
     * The value is, e.g. 10000 <br>