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Java

Swap JSON Objects

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Demonstrates how to swap two JSON objects within a JSON document.

Chilkat Java Downloads

Java
import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    CkJsonObject json = new CkJsonObject();
    json.put_EmitCompact(false);

    // Load the following JSON:

    // {
    //   "petter": {
    //     "DOB": "26/02/1986",
    //     "gender": "male",
    //     "country": "US"
    //   },
    //   "Sara": {
    //     "DOB": "13/05/1982",
    //     "gender": "female",
    //     "country": "FR"
    //   },
    //   "Jon": {
    //     "DOB": "19/03/1984",
    //     "gender": "male",
    //     "country": "UK"
    //   }
    // }

    success = json.LoadFile("qa_data/json/people.json");
    if (success == false) {
        System.out.println(json.lastErrorText());
        return;
        }

    // Swap the positions of Jon and Sara.
    int index1 = json.IndexOf("Jon");
    int index2 = json.IndexOf("Sara");
    json.Swap(index1,index2);

    // We have this now:
    System.out.println(json.emit());

    // {
    //   "petter": {
    //     "DOB": "26/02/1986",
    //     "gender": "male",
    //     "country": "US"
    //   },
    //   "Jon": {
    //     "DOB": "19/03/1984",
    //     "gender": "male",
    //     "country": "UK"
    //   },
    //   "Sara": {
    //     "DOB": "13/05/1982",
    //     "gender": "female",
    //     "country": "FR"
    //   }
    // }

    // To swap an inner member:

    CkJsonObject jsonSara = new CkJsonObject();
    json.ObjectOf2("Sara",jsonSara);

    index1 = jsonSara.IndexOf("DOB");
    index2 = jsonSara.IndexOf("country");
    jsonSara.Swap(index1,index2);

    // We now have this:
    System.out.println(json.emit());

    // {
    //   "petter": {
    //     "DOB": "26/02/1986",
    //     "gender": "male",
    //     "country": "US"
    //   },
    //   "Jon": {
    //     "DOB": "19/03/1984",
    //     "gender": "male",
    //     "country": "UK"
    //   },
    //   "Sara": {
    //     "country": "FR",
    //     "gender": "female",
    //     "DOB": "13/05/1982"
    //   }
    // }
  }
}