// DOWNLOAD DOCUMENT SECTION BEGIN

    public void downloadFileListener(FacesContext facesContext, OutputStream outputStream) throws IOException {
        if (null != (String)getSelectedRow(docTable).getAttribute("FilePath") &&
            !((String)getSelectedRow(docTable).getAttribute("FilePath")).isEmpty()) {
            File file = new File((String)getSelectedRow(docTable).getAttribute("FilePath"));
            downloadFile(outputStream, file);
        }
    }

    public void downloadFileListenerFromIterator(FacesContext facesContext,
                                                 OutputStream outputStream) throws IOException {
        JUCtrlHierNodeBinding node = (JUCtrlHierNodeBinding)this.iteratorCurrentRow;

        Object filePath = node.getAttribute("FilePath");
        if (null != filePath && !((String)node.getAttribute("FilePath")).isEmpty()) {
            File file = new File((String)filePath);
            log.debug(" DOWNLOAD FILE called second ");
            downloadFile(outputStream, file);
        }
    }

    private void downloadFile(OutputStream outputStream, File file) throws java.io.IOException {
        FileInputStream fis = null;
        byte[] b;
        try {
            fis = new FileInputStream(file);

            int n;
            while ((n = fis.available()) > 0) {
                b = new byte[n];
                int result = fis.read(b);
                outputStream.write(b, 0, b.length);
                if (result == -1)
                    break;
            }
        } catch (IOException e) {
            log.error(e.getMessage(), e);
            e.printStackTrace();
        } finally {
            fis.close();
            outputStream.flush();
            outputStream.close(); //close added recently
        }
    }

    // DOWNLOAD DOCUMENT SECTION END