Add JsonArray to JsonObject

Question

I googled a lot today for this subject. But I can't find it, How can I add a JSONArray to a JSONObject?

Because everytime I do this I get this error: Stackoverflow

        JSONObject fillBadkamerFormaatFromContentlet(Structure structure, String formaat) {     JSONObject jsonObject = new JSONObject();     JSONArray arr = new JSONArray();      BadkamerFormaat badkamerFormaat = new BadkamerFormaat();     BadkamerTegel badkamerTegel;     List<Contentlet> contentlets = getContentletsByStructure(structure);     badkamerFormaat.formaat = formaat;     badkamerFormaat.tegels = new ArrayList<BadkamerTegel>();      try {         jsonObject.put("formaat", formaat);      } catch (JSONException e1) {         throw new RuntimeException(e1);     }      for(Contentlet contentlet : contentlets) {         badkamerTegel = new BadkamerTegel();         badkamerTegel.naam = contentlet.getStringProperty(ParameterNames.toolBetegelVeldNaam);         try {             badkamerTegel.afbeeldingTegel = contentlet.getBinary(ParameterNames.toolBetegelVeldTegelAfbeelding).getPath();             badkamerTegel.afbeeldingBadkamer = contentlet.getBinary(ParameterNames.toolBetegelVeldBadkamerAfbeelding).getCanonicalPath();             arr.put(badkamerTegel.toJSON());         } catch (IOException e) {             throw new RuntimeException(e);         }        }      try {         jsonObject.put("aoColumnDefs",arr);     } catch (JSONException e) {         throw new RuntimeException(e);     }      return jsonObject;           } 

I get this error:

java.lang.StackOverflowError at com.dotmarketing.util.json.JSONArray.<init>(JSONArray.java:248) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) at com.dotmarketing.util.json.JSONObject.put(JSONObject.java:953) 

The JSON I want: Only the last JsonArray is going wrong:

{            "wand": [         {             formaat: 'vierkant15x15'             tegels: [                     {naam: '', imgThumb: '/bla/bla.png', largeImg: '/bla/bla2.png'}                     ,{naam: '', imgThumb: '/bla/bla.png', largeImg: '/bla/bla2.png'}                     ]         }         ,          {             formaat: 'vierkant17x15'             tegels: [                     {naam: '', imgThumb: '/bla/bla.png', largeImg: '/bla/bla2.png'}                     ,{naam: '', imgThumb: '/bla/bla.png', largeImg: '/bla/bla2.png'}                     ]         }     ] 

, "vloer": [ { formaat: 'vierkant10x15' tegels: [ {naam: '', imgThumb: '/bla/bla.png', largeImg: '/bla/bla2.png'} ,{naam: '', imgThumb: '/bla/bla.png', largeImg: '/bla/bla2.png'} ] } ,

        {             formaat: 'vierkant45x15'             tegels: [                     {naam: '', imgThumb: '/bla/bla.png', largeImg: '/bla/bla2.png'}                     ,{naam: '', imgThumb: '/bla/bla.png', largeImg: '/bla/bla2.png'}                     ]         }     ] 

}

Answer 1

I think it is a problem(aka. bug) with the API you are using. JSONArray implements Collection (the json.org implementation from which this API is derived does not have JSONArray implement Collection). And JSONObject has an overloaded put() method which takes a Collection and wraps it in a JSONArray (thus causing the problem). I think you need to force the other JSONObject.put() method to be used:

    jsonObject.put("aoColumnDefs",(Object)arr); 

You should file a bug with the vendor, pretty sure their JSONObject.put(String,Collection) method is broken.

Answer 2

here is simple code

List <String> list = new ArrayList <String>(); list.add("a"); list.add("b"); JSONArray array = new JSONArray(); for (int i = 0; i < list.size(); i++) {         array.put(list.get(i)); } JSONObject obj = new JSONObject(); try {     obj.put("result", array); } catch (JSONException e) {  // TODO Auto-generated catch block e.printStackTrace(); } pw.write(obj.toString());