private void prepare( DownloadCheckPoint downloadCheckPoint, DownloadFileRequest downloadFileRequest) throws IOException { downloadCheckPoint.magic = DownloadCheckPoint.DOWNLOAD_MAGIC; downloadCheckPoint.downloadFile = downloadFileRequest.getDownloadFile(); downloadCheckPoint.bucketName = downloadFileRequest.getBucketName(); downloadCheckPoint.objectKey = downloadFileRequest.getKey(); downloadCheckPoint.objectStat = ObjectStat.getFileStat( objectOperation, downloadCheckPoint.bucketName, downloadCheckPoint.objectKey); downloadCheckPoint.downloadParts = splitFile(downloadCheckPoint.objectStat.size, downloadFileRequest.getPartSize()); createFixedFile(downloadFileRequest.getDownloadFile(), downloadCheckPoint.objectStat.size); }