Working with JSON

Description

There is a special org.restlet.gwt.resource.JsonRepresentation class that you can leverage to either parse a JSON representation received or to serialize a JSON value. In addition, a shortcut org.restlet.gwt.data.Response#getEntityAsJson() was added to automatically wrap the response entity in a JsonRepresentation instance.

Here is a sample code taken from the example application. The JsonRepresentation gives access to the underlying JSONValue after the representation has been parsed.

Request request = new Request(Method.GET, "http://localhost:8888/test");
// Indicates the client preferences and let the server handle the best representation with content negotiation.
request.getClientInfo().getAcceptedMediaTypes().add(new Preference<MediaType>(MediaType.APPLICATION_JSON));
new Client(Protocol.HTTP).handle(request, new Callback() {
        @Override
        public void onEvent(Request request, Response response) {
                // Get the representation as an JsonRepresentation
                JsonRepresentation rep = response.getEntityAsJson();
                // Displays the properties and values.
                JSONObject object = rep.getValue().isObject();
                if (object != null) {
                        for (String key : object.keySet()) {
                                jsonRoot.addItem(key + ":" + object.get(key));
                        }
                }
        }
});