private String retrieveFile(HttpServletRequest req) {
        StringBuilder str = new StringBuilder();

        try {

            //  Collection<Part> parts = req.getP();
            Part part = req.getPart("iFile");

            // System.out.println("No of parts:" + parts.size());
            //       System.out.println("outside");

            //for (Part part : parts) {

            fileType = getFileType(part);

            //  part.write("part-" + part.getName());


            InputStream is = part.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            char[] buf = new char[10];

            while ((br.read(buf)) != -1) {
                str.append(buf);
            }
            is.close();
            br.close();



            Collection<Part> parts = req.getParts();
            StringBuilder sb = new StringBuilder();

            for (Part p : parts) {

                if (!"iFile".equals(p.getName())) {
                    Scanner scanner = new Scanner(p.getInputStream());


                    while (scanner.hasNext()) {
                        sb.append(scanner.nextLine()).append(":");
                    }


                }

            }
            req.getSession().setAttribute("aEngine", sb.toString());

            //Part myStringPart = req.getPart("aEngine");

//            myStringPart = req.getPart("aEngine");
//            scanner = new Scanner(myStringPart.getInputStream());
//
//            while (scanner.hasNext()) {
//                sb.append(scanner.next()).append(":");
//            }
//
//


// }

            // System.out.println("File contents:\n" + str.toString());

        } catch (IOException ex) {
            Logger.getLogger(UIMAUpload.class.getName()).log(Level.SEVERE, null, ex);
        } catch (ServletException ex) {
            Logger.getLogger(UIMAUpload.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            return str.toString();

        }
    }