String enc;
            if (StringUtil.isNotBlank(getFessConfig().getCrawlerDocumentSiteEncoding())
                    && (!getFessConfig().isCrawlerDocumentUseSiteEncodingOnEnglish() || "ISO-8859-1".equalsIgnoreCase(encoding)
                            || "US-ASCII".equalsIgnoreCase(encoding))) {
                enc = getFessConfig().getCrawlerDocumentSiteEncoding();
            } else {
                enc = encoding;
            }

            }

            @Override
            public String getCrawlerDocumentFileNameEncoding() {
                return "";
            }

            @Override
            public String getCrawlerDocumentSiteEncoding() {
                return "";
            }

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

     * The value is, e.g. UTF-8 <br>
     * comment: Encoding for site names in documents.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getCrawlerDocumentSiteEncoding();

    /**
     * Get the value for the key 'crawler.document.unknown.hostname'. <br>
     * The value is, e.g. unknown <br>
     * comment: Hostname to use when unknown in documents.