if (isNotModified(responseData)) {
            final UrlQueue<?> urlQueue = CrawlingParameterUtil.getUrlQueue();
            final ResultData resultData = new ResultData();
            resultData.setData(new byte[0]);
            resultData.setEncoding(Constants.UTF_8);
            resultData.setTransformerName(Constants.NO_TRANSFORMER);
            processResult(urlQueue, responseData, resultData);

            throw new CrawlerSystemException(
                    "Transformer is invalid. Use " + accessResultData.getTransformerName() + ". This transformer is " + getName() + ".");
        }

        final byte[] data = accessResultData.getData();
        if (data == null) {
            return null;
        }
        final String encoding = accessResultData.getEncoding();
        String filePath;
        try {

                throw new CrawlerSystemException("Transformer is invalid. Use " + accessResultData.getTransformerName()
                        + ". This transformer is " + getName() + ".");
            }

            final byte[] data = accessResultData.getData();
            if (data == null) {
                return null;
            }
            final String encoding = accessResultData.getEncoding();
            try {