}

    protected int[] getSpaceChars() {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        return fessConfig.getCrawlerDocumentSpaceCharsAsArray();
    }

    public String getDigest(final ResponseData responseData, final String content, final Map<String, Object> dataMap, final int maxWidth) {
        if (content == null) {
            return StringUtil.EMPTY; // empty
        }