GridFS is failing to write the file. After creating a GridFS class and storing few files to mongodb. I am trying to read it back.

DBCursor cursor = fs.getFileList();
int count=0;
while(cursor.hasNext()){

GridFSDBFile object = (GridFSDBFile)cursor.next();
final InputStream is = object.getInputStream();
System.out.println("is to "+is.toString());
try

{ //destination = Paths.get("C:\\drls\\test"+count+".drl"); //Files.copy(is, destination); object.writeTo("C:\\drls\\test"+count+".drl"); }

catch (IOException e)

{ // TODO Auto-generated catch block e.printStackTrace(); }

count++;
}