Replace the use of JSONObject and JSONArray from json-rpc lib by JSONCodec; for doing, a new method is added to JSONCodec.JSONObject to add an array as a JSON object attribute. Rename UserFavoriteSpaceDAO by UserFavoriteSpaceService and DAOProvider by UserFavoriteSpaceServiceProvider, and delete UserFavoriteSpaceManager (the methods provided by this class are now defined in UserFavoriteSpaceService)