JSONMap class

I’m starting off with converting some inhouse developed AJAX stuff to using DOJO and for that reason I needed to convert my XML responses to JSON. Using the JSON Java classes this was pretty straight forward but I really needed an easier way to convert a java.util.Map instance to JSON. Extending JSONArray this was easy. Provided here for those who might need similar code…

package org.json;

import java.util.Iterator;
import java.util.Map;

public class JSONMap extends JSONArray {
   public JSONMap(Map m) {
      for (Iterator ite=m.keySet().iterator(); ite.hasNext(); ) {
         String key = (String)ite.next();
         String value = m.get(key).toString();
         JSONArray a = new JSONArray();
         a.put(value);
         a.put(key);
         this.put(a);
      }
   }
}

Code like this

Map m = new HashMap();
m.put("AL", "Alabama");
m.put("AK", "Alaska");
m.put("AR", "Arkansas");
JSONMap jm = new JSONMap(m);
System.out.println(jm.toString());

will output the following JSON

[
    [ "Alabama", "AL" ],
    [ "Alaska", "AK" ],
    [ "Arkansas", "AR" ]
]