private static DiskFileItem makePayload ( int thresh, String repoPath, String filePath, byte[] data ) throws IOException, Exception { // if thresh < written length, delete outputFile after copying to repository temp file // otherwise write the contents to repository temp file File repository = new File(repoPath); DiskFileItem diskFileItem = new DiskFileItem("test", "application/octet-stream", false, "test", 100000, repository); File outputFile = new File(filePath); DeferredFileOutputStream dfos = new DeferredFileOutputStream(thresh, outputFile); OutputStream os = (OutputStream) Reflections.getFieldValue(dfos, "memoryOutputStream"); os.write(data); Reflections.getField(ThresholdingOutputStream.class, "written").set(dfos, data.length); Reflections.setFieldValue(diskFileItem, "dfos", dfos); Reflections.setFieldValue(diskFileItem, "sizeThreshold", 0); return diskFileItem; }