2

Well, I am creating dumped objects using a ByteArrayOutputStream. And then will write them to MongoDB as an attribute in my documents. When I read it back how can I convert it to a byte array or a Binary without using a toString in the middle?

This is the way I do it now, and I dont think it is safe:

BasicBSONObject temp = (BasicBSONObject) models.get("0");
model = null;
    if (temp != null) {
        // TODO fix this serialization!
        try {
            ObjectInputStream ois = new ObjectInputStream(
                    new ByteArrayInputStream(temp.toString().getBytes()));

        } catch (IOException e) {
            L.error("unable to read model from string!");
            L.error(e.getStackTrace().toString());
        }
    }
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  • Did you try the temp.get("<key>") and casting to your target object? If that doesn't work, I guess, you might not have the option other than toString Commented Dec 19, 2012 at 17:53
  • 2
    I suggest you convert the byte array to a base64 string before save it in mongodb. In read operation, first decode the base64 to a byte array. Commented Dec 19, 2012 at 19:10
  • @MiguelCartagena Thank you but I guess that will be too much overhead.... Commented Jan 7, 2013 at 15:18
  • 1
    @HRahimi I store some small files in MongoDB in that way ... without overheads. Commented Jan 7, 2013 at 15:34
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