Trying to parse a nested json and store in a nested Map. While reading it gives extra values in the Map. Code, output and json below

Question

Map < String, Map < String, String >> appPayload = new HashMap < String, Map < String, String >> ();
Map < String, String > featurePayload = new HashMap < String, String > ();

JSONArray appList = new JSONArray();            
JSONArray requestDetails = new JSONArray();
requestDetails = new JSONObject(payload).getJSONArray("requestDetails");     
appList = requestDetails.getJSONObject(0).getJSONArray("apps");         

for (int i =0; i<appList.length();i++) {

    String appName = appList.getJSONObject(i).getString("appName");
    JSONArray featureList = appList.getJSONObject(i).getJSONArray("features");              

    for (int j =0; j<featureList.length();j++) {
        String featureName = featureList.getJSONObject(j).getString("featName");
        String featureResponse = featureList.getJSONObject(j).getString("featResponse");
        featurePayload.put(featureName, featureResponse);
    }
    appPayload.put(appName, featurePayload);
}

return appPayload;

}

Output :

Appname : CD

{Video Snapshot=enabled, Base=enabled}

Appname : CSU
{Video Snapshot=enabled, Base=enabled}

Appname : FO
{Video Snapshot=enabled, Base=disabled}

Appname : EDL
{Video Snapshot=enabled, Base=enabled}

Appname : CA
{Video Snapshot=enabled, Base=disabled}

And here is the json string

{
  "apiVersion": "1.0",
  "providerID": 504070500,
  "timeStamp": "2019-09-12T19:51:56.902Z",
  "messageID": "3abb70f4-d5bb-11e9-bb65-2a2ae2dbcce4",
  "requestDetails": [
    {
      "esn": "64000008",
      "boxID": "357649070551015",
      "apps": [
        {
          "appName": "CD",
          "features": [
            {
              "featName": "Base",
              "featResponse": "enabled"
            },
            {
              "featName": "Video Snapshot",
              "featResponse": "enabled"
            }
          ]
        },
        {
          "appName": "CSU",
          "features": [
            {
              "featName": "Base",
              "featResponse": "enabled"
            }
          ]
        },
        {
          "appName": "FO",
          "features": [
            {
              "featName": "Base",
              "featResponse": "disabled"
            }
          ]
        },
        {
          "appName": "EDL",
          "features": [
            {
              "featName": "Base",
              "featResponse": "enabled"
            }
          ]
        },
        {
          "appName": "CA",
          "features": [
            {
              "featName": "Base",
              "featResponse": "disabled"
            }
          ]
        }
      ]
    }
  ]
}

Could you add your expected output? – Villat Oct 16 '19 at 00:27 — Villat, Oct 16 '19 at 00:27

score 0 · Answer 1 · answered Oct 15 '19 at 21:33

0

Try to instantiate featurePayload before the nested loop

answered Oct 15 '19 at 21:33

Ryan19

71
4

Thanks! It worked. What changes when I instantiate it before the nested loop. Please educate me! :D – Neeraj Oct 16 '19 at 14:12
All the values of app payload were referencing the same featurePayload HashMap, which is getting updated each iteration. So your end result would be, appPayload map with each app having the same value. Remember, Objects are passed through reference in java.. – Ryan19 Oct 16 '19 at 15:10

Trying to parse a nested json and store in a nested Map. While reading it gives extra values in the Map. Code, output and json below

1 Answers1