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Parse Json Recursively and manipulate the object value

I've a complex json object which i want to iterate and replace a specific key values. The key value to be replaced will be under rules -> field -> value and inside the value based on the id I've to replace the name. For instance i have a json object { "id" : "123" , "name" : "abc" } i want to replace with { "id" : "123" , "name" : "xyz" }
Input :
{
"condition": {
"rules": [{
"field": "stage.id",
"value": [{
"condition": [{
"rules": [{
"field": "stage.id",
"value": [{
"condition": [{
"rules": [{
"field": "stage.id",
"value": [{
"id": "123",
"name": "abc",
"item": {
"id": "456",
"name": "ffgg"
}
}]
}]
}]
}]
}]
}]
},
{
"field": "tasks.stage.id",
"value": [{
"id": "456",
"name": "def"
}]
},
{
"field": "stage.id",
"value": [{
"id": "123",
"name": "abc"
}]
}
]
}]
}
Expected Output:
{
"condition": {
"rules": [{
"field": "stage.id",
"value": [{
"condition": [{
"rules": [{
"field": "stage.id",
"value": [{
"condition": [{
"rules": [{
"field": "stage.id",
"value": [{
"id": "123",
"name": "xyz",
"item": {
"id": "456",
"name": "ffgg"
}
}]
}]
}]
}]
}]
}]
},
{
"field": "tasks.stage.id",
"value": [{
"id": "456",
"name": "def"
}]
},
{
"field": "stage.id",
"value": [{
"id": "123",
"name": "xyz"
}]
}
]
}]
}
I've iterated to the object based in the instance but replacing the value is not working as expected. I'm not sure what i've missed here. Can someone help me in here.
Code Sample
try {
loopThroughJson(new JSONObject(theInput)));
} catch (JSONException e) {
e.printStackTrace();
}
public static String loopThroughJson(Object input) throws JSONException {
if (input instanceof JSONObject) {
Iterator<?> keys = ((JSONObject) input).keys();
while (keys.hasNext()) {
String key = (String) keys.next();
if (!(((JSONObject) input).get(key) instanceof JSONArray))
if (((JSONObject) input).get(key) instanceof JSONObject) {
loopThroughJson(((JSONObject) input).get(key));
} else
System.out.println(key + "=" + ((JSONObject) input).get(key));
else
loopThroughJson(new JSONArray(((JSONObject) input).get(key).toString()));
}
}
if (input instanceof JSONArray) {
Gson gson = new Gson();
for (int i = 0; i < ((JSONArray) input).length(); i++) {
JSONObject a = ((JSONArray) input).getJSONObject(i);
if (a.opt("field") != null && a.opt("field").equals("stage.id")) {
Map<String, Object> fieldJson = gson.fromJson(a.toString(), Map.class);
List<Map<String, Object>> valueArray = (List<Map<String, Object>>) fieldJson.get("value");
for (Map<String, Object> valueObject : valueArray) {
if (valueObject.get("id").toString().equals("123")) {
valueObject.put("name", "xyz");
}
}
a = new JSONObject(fieldJson);
}
loopThroughJson(a);
}
}
return input.toString();

Java Stream representation of extracting data from jsonobj

I have a service that returns me a response that has the below object
{
"features": [
{
"name": "climateControl"
},
{
"name": "drivingControl"
},
{
"name": "breakeControl",
"type": [
{
"name": "safety"
}
]
},
{
"name": "seatAdjustments",
"type": [
{
"name": "motion"
}
]
},
{
"name": "enginePower",
"type": [
{
"name": "motion"
}
]
}
]
}
Now I need to extract the feature names that are either null or doesn't have any type with name "safety"
I can write something like below
List<Features> features = service.getFeatures();
List<String> refinedList = new ArrayList<>();
for(Feature feature:features){
if(feature.getType==null || feature.getType().getName().equalsIgnoreCase("safety") )
{
refinedList.add(feature.getName());
}
}
Looking for a way to do the same using java streams.

You can use filter for the if conditions and map to getName, then collect as:
List<String> refinedList = features.stream()
.filter(feature -> feature.getType == null || feature.getType().getName().equalsIgnoreCase("safety"))
.map(feature -> feature.getName())
.collect(Collectors.toList());

Add hashmap having possible serialized JSON values to a JSON string as a node

What is the cheapest way to take the jsonstring and hashmap below and produce the result in JAVA?
pseudocode data example:
String jsonstring = {
"people": {
"name": "name1",
},
"addresses": {
"address1": {
"number": "1234",
"city": "europa"
}
}
}
HashMap hashmap = {
["string.a.1"] = "stringa1",
["string.a.2"] = "stringa2",
["object.a.1"] = "{/"item1/":/"value1/"}" // serialized JSON object
}
String result = {
"people": {
"name": "name1",
},
"addresses": {
"address1": {
"number": "1234",
"city": "europa"
}
},
"buffer": {
"string.a.1": "stringa1",
"string.a.2": "stringa2",
"object.a.1": {
"item1": "value1"
}
}
}
Thanks in advance for any help.

how to parse this in android with json

I want to parse this json in android. Can you help me how to parse, if i need to start from head to parse or from results for this I don't know. Can you help me
{
"head":
{
"link": [],
"vars": ["city", "country"]
},
"results":
{
"distinct": false,
"ordered": true,
"bindings":
[
{
"city":
{
"type": "uri",
"value": "http://dbpedia.org/resource/Ferizaj"
} ,
"country":
{
"type": "uri",
"value": "http://dbpedia.org/resource/Kosovo"
}
}
]
}
}

Okay, first of all the JSON string you've given is invalid. I've written my answer based on the correct version of the JSON string that you have provided
{
"head":
{
"link": [],
"vars": ["city", "country"]
},
"results":
{
"distinct": false,
"ordered": true,
"bindings":
[
{
"city":
{
"type": "uri",
"value": "http://dbpedia.org/resource/Ferizaj"
} ,
"country":
{
"type": "uri",
"value": "http://dbpedia.org/resource/Kosovo"
}
}
]
}
}
Now, to get the "values", you'll need to do this.
JSONObject jsonObject = new JSONObject(response);
JSONObject results = jsonObject.getJSONObject("results");
JSONArray bindings = results.getJSONArray("bindings");
for (int i = 0; i < bindings.length(); i++) {
JSONObject binding = bindings.getJSONObject(i);
JSONObject city = binding.getJSONObject("city");
// Get value in city
String cityValue = city.getString("value");
Log.d("CITY", cityValue);
JSONObject country = binding.getJSONObject("country");
// Get value in country
String countryValue = country.getString("value");
Log.d("COUNTRY", countryValue);
}

Parse Json String (Feed RSS file) in Android

How can I parse this piece of JSON code?
{
"direction": "ltr",
"id": "feed/http => //www.theverge.com/rss/full.xml",
"title": "The Verge - All Posts",
"continuation": "CLKM0OyU0rYC",
"self": [
{
" href": "https => //cloud.feedly.com/reader/3/stream/contents/feed%2Fhttp%3A%2F%2Fwww.theverge.com%2Frss%2Ffull.xml?n=20&unreadOnly=true"
}
],
"alternate": [
{
"href": "http://www.theverge.com/",
"type": "text/html"
}
],
"updated": 1367539068016,
"items": [
{
"id": "entryId",
"unread": true,
"categories": [
{
"id": "user/c805fcbf-3acf-4302-a97e-d82f9d7c897f/category/tech",
"label": "tech"
}
],
"tags": [
{
"id": "user/c805fcbf-3acf-4302-a97e-d82f9d7c897f/tag/inspiration",
"label": "inspiration"
}
],
"title": "NBC's reviled sci-fi drama 'Heroes' may get a second lease on life as Xbox Live exclusive",
"published": 1367539068016,
"updated": 1367539068016,
"crawled": 1367539068016,
"alternate": [
{
"href": "http://www.theverge.com/2013/4/17/4236096/nbc-heroes-may-get-a-second-lease-on-life-on-xbox-live",
"type": "text/html"
}
],
"content": {
"direction": "ltr",
"content": "..."
},
"author": "Nathan Ingraham",
"origin": {
"streamId": "feed/http://www.theverge.com/rss/full.xml",
"title": "The Verge - All Posts",
"htmlUrl": "http://www.theverge.com/"
},
"engagement": 15
},
{
"id": "entryId2",
"unread": true,
"categories": [
{
"id": "user/c805fcbf-3acf-4302-a97e-d82f9d7c897f/category/tech",
"label": "tech"
}
],
"tags": [
{
"id": "user/c805fcbf-3acf-4302-a97e-d82f9d7c897f/tag/inspiration",
"label": "inspiration"
}
],
"title": "Senate rejects bipartisan gun control measure for background checks despite broad public support",
"published": 1367539068016,
"updated": 1367539068016,
"crawled": 1367539068016,
"alternate": [
{
"href": "http://www.theverge.com/2013/4/17/4236136/senate-rejects-gun-control-amendment",
"type": "text/html"
}
],
"content": {
"direction": "ltr",
"content": "...html content..."
},
"author": "T.C. Sottek",
"origin": {
"streamId": "feed/http://www.theverge.com/rss/full.xml",
"title": "The Verge - All Posts",
"htmlUrl": "http://www.theverge.com/"
},
"engagement": 39
}
]
}
That is my solution but it doesn't work... what is my error? thanks
try{
//JSONArray elements = new JSONArray (response);
JSONObject json=new JSONObject(response);
JSONArray elements = json.getJSONArray("items");
Log.d(TAG, "Elemenenti numero" +elements.length());
// Getting Array of Contacts
// looping through All Contacts
for(int i = 0; i < elements.length(); i++){
JSONObject c = elements.getJSONObject(i);
// Storing each json item in variable
String identifier = c.getString("id");
String title = c.getString("title");
String link = c.getString("originId");
String data = c.getString("published");
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
Date date=new Date();
try {
date = format.parse(data);
System.out.println(date);
} catch (Exception e) {
e.printStackTrace();
}
JSONObject summaryObj= c.getJSONObject("summary");
String summary = summaryObj.getString("content");
JSONObject contentObj= c.getJSONObject("content");
String content = contentObj.getString("content");
JSONObject sourceObj= c.getJSONObject("origin");
String source = contentObj.getString("title");
if (summary.length()==0 && content.length()!=0) summary=content;
if (content.length()==0 && summary.length()!=0) content=summary;
String image=this.getFirstImage(content);
FeedItem toAdd=new FeedItem(identifier, title, link, date, null, summary, content, image, source);
toAdd.toString();
}
}catch (JSONException e) {
e.printStackTrace();
}

JSONObject summaryObj= c.getJSONObject("summary");
There is no element called summary, you may try
if(c.has("summary")) {
JSONObject summaryObj= c.getJSONObject("summary");
}
if that doesn't work, please post your stacktrace, (logcat)

You don't have any tag named "originID". but you are trying to get String from it.
Similarly,you don't have tag "summary" also but you are trying to get JSONObject from it.