How to iterate over a JSONObject?

Question

I use a JSON library called JSONObject (I don\'t mind switching if I need to).

I know how to iterate over JSONArrays, but when I parse JSO

Answer 1

I once had a json that had ids that needed to be incremented by one since they were 0-indexed and that was breaking Mysql auto-increment.

So for each object I wrote this code - might be helpful to someone:

public static void  incrementValue(JSONObject obj, List keysToIncrementValue) {
        Set keys = obj.keySet();
        for (String key : keys) {
            Object ob = obj.get(key);

            if (keysToIncrementValue.contains(key)) {
                obj.put(key, (Integer)obj.get(key) + 1);
            }

            if (ob instanceof JSONObject) {
                incrementValue((JSONObject) ob, keysToIncrementValue);
            }
            else if (ob instanceof JSONArray) {
                JSONArray arr = (JSONArray) ob;
                for (int i=0; i < arr.length(); i++) {
                    Object arrObj = arr.get(0);
                    if (arrObj instanceof JSONObject) {
                        incrementValue((JSONObject) arrObj, keysToIncrementValue);
                    }
                }
            }
        }
    }

usage:

JSONObject object = ....
incrementValue(object, Arrays.asList("id", "product_id", "category_id", "customer_id"));

this can be transformed to work for JSONArray as parent object too