Doubt in JSONArray Initialization

[Vineeth Menon]

Hi Folks,
Why would does this code work

JSONObject transportDetails = createTransportDetails(travelContextCreation.getJSONArray("travelDetails"));
                if (transportDetails.has("Success")) {
                                JSONArray temp = transportDetails.getJSONArray("transportDetailsArray");
                                travelContextCreation.put("transportDetails", temp);
                }

And this not work.

JSONObject transportDetails = createTransportDetails(travelContextCreation.getJSONArray("travelDetails"));
                if (transportDetails.has("Success")) {
                                travelContextCreation.put("transportDetails", 
new JSONArray(transportDetails.getJSONArray("transportDetailsArray")));
                }

I get the exception “JSONArray initial value should be a string or collection or array”. The transportDetails is an array, I guess I'm not sure what is going wrong. Can anyone help me out?
PS: In both the cases the transportDetails has value in it.

[Stephan van Hulst]

Impossible to say without knowing what library you're using.

[Vineeth Menon]

Hi Stephan,

I'm using the JSON Library. I feel the problem was that the, inside the new JSONArray

transportDetailsObject.getJSONArray("transportDetailsArray")

was being considered as an object and not as a String (Hence the error message "JSONArray initial value should be a string or collection or array"). So when I added .toString() at the end, the code is working.

transportDetailsObject.getJSONArray("transportDetailsArray").toString()

Not sure if it's a correct hypothesis, but please do correct me if I am wrong.

[Stephan van Hulst]

The documentation really says it all. The constructor that takes an object actually expects it to be an array of some sort. A JSONArray is not an array, so that's why you get the exception.