The Tor Browser / file revision

 /* This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this

  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 package org.mozilla.gecko.util;

 import java.util.UUID;

 import org.json.JSONException;

 import org.json.JSONObject;

 public final class JSONUtils {

     private JSONUtils() {}

     public static UUID getUUID(String name, JSONObject json) {

         String uuid = json.optString(name, null);

         return (uuid != null) ? UUID.fromString(uuid) : null;

     }

     public static void putUUID(String name, UUID uuid, JSONObject json) {

         String uuidString = uuid.toString();

         try {

             json.put(name, uuidString);

         } catch (JSONException e) {

             throw new IllegalArgumentException(name + "=" + uuidString, e);

         }

     }

 }