http://www.baeldung.com/convert-file-to-input-stream
 DataSet dataSet = from(this.getClass().getResourceAsStream("dataset-sample_cache.json"));
 
http://www.baeldung.com/convert-input-stream-to-a-file

        File targetFile = new File("src/main/resources/targetFile.tmp");
        OutputStream outStream = new FileOutputStream(targetFile);

        byte[] buffer = new byte[8 * 1024];
        int bytesRead;
        while ((bytesRead = jsonResult.read(buffer)) != -1) {
            outStream.write(buffer, 0, bytesRead);
        }
        IOUtils.closeQuietly(jsonResult);
        IOUtils.closeQuietly(outStream);