public void downloadFile(OAPageContext pageContext) {

         HttpServletResponse response = (HttpServletResponse) pageContext.getRenderingContext().getServletResponse();

         File fileToDownload = this.createFile();

         String fileType = getMimeType("txt");

         response.setContentType(fileType);

         response.setContentLength((int) fileToDownload.length());

         response.setHeader("Content-Disposition", "attachment; filename=\"" + fileToDownload.getName() + "\"");

         InputStream in = null;

         ServletOutputStream outs = null;

         try {

             outs = response.getOutputStream();

             in = new BufferedInputStream(new FileInputStream(fileToDownload));

             int ch;

             while ((ch = in.read()) != -1) {

                 outs.write(ch);

             }

         } catch (IOException e) {

             // TODO

             e.printStackTrace();

         } finally {

             try {

                 outs.flush();

                 outs.close();

                 if (in != null) {

                     in.close();

                 }

             } catch (Exception e) {

                 e.printStackTrace();

             }

         }

     }