JSONObject Java equivalent for Objective C -

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i'm working on api objective c has equivalent java version. used json.org elements define json parsing in java.

 import org.json.jsonobject;   public class testcoderequest{     private hashmap<string,jsonobject> query = new hashmap<string, jsonobject>();     private jsonobject queryresult;   }

and 

    public testcoderequest add(string endpoint, object... fields) {          jsonobject endpointquery;          if ((endpointquery = query.get(endpoint)) == null) {              endpointquery = new jsonobject();              query.put(endpoint,endpointquery);            }         jsonobject sq = endpointquery;         (int i=0;i<fields.length-2;i++) {         jsonobject tmp = sq;         if(sq.has((string)fields[i])){         try {           sq = sq.getjsonobject((string)fields[i]);             } catch(exception e) {                 throw new semantics3exception(                         "invalid constraint",                         "cannot add constraint, '" + fields[i] +"'      value.");                                  }          } else {           sq = new jsonobject();           tmp.put((string)fields[i], sq);          }      }       sq.put((string)fields[fields.length-2], fields[fields.length-1]);       return this;    }

i guess nsdictionary objective c equivalent hashmap. i'm using jsonkit json parsing. wondering jsonobject in case.

jsonobject equivalent nsdictionary (an unordered collection of name/value or key/value pairs).


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