Converting DynamoDB JSON to Standard JSON with Java

Question

I need to convert a AWS DYNAMODB JSON to a standard JSON object. so I can remove the data type from the DynamoDB JSON Something more like:

in DYNAMODB JSON:

Answer 1

Convert your JSON string to a Map first using

JSONObject jsonObj = new JSONObject(logString);
HashMap myMap = new Gson().fromJson(jsonObj.toString(), HashMap.class);

Function for converting DynamoDB JSON to Standard JSON

public static Map mapToJson(Map map){
        Map finalKeyValueMap = new HashMap();
        Iterator it = map.entrySet().iterator();

        while(it.hasNext()) {
            Map.Entry pair = (Map.Entry)it.next();

            Map obj1 = (Map) pair.getValue();
            if(obj1.get("m") == null) {
                if(obj1.get("n") != null)
                    finalKeyValueMap.put(pair.getKey().toString(),obj1.get("n"));
                else if(obj1.get("s") != null)
                    finalKeyValueMap.put(pair.getKey().toString(),obj1.get("s"));
            }
            else {
                Map obj2 = (Map) pair.getValue();
                Map obj3 = (Map) obj2.get("m");
                finalKeyValueMap.put(pair.getKey().toString(),mapToJson(obj3));
            }

        }
        System.out.println(finalKeyValueMap.toString());
        return finalKeyValueMap;
    }

calling mapToJson(myMap); will return a standard Map which you can convert back to JSON