How do I assign a JSONObject or JavaScriptObject to $wnd[x] in GWT?

Question

I read some var from my HTML-Page using GWT Dictionary. The var looks like this:

var test = {
    "a" : "123",
    "b" : "jg34l",
    ...
}

Now I get via AJAX-Call new content for my JS var. At the moment I overwrite it like this:

public native void set(String key, String value) /*-{
    $wnd["test"][key] = value;
}-*/;

public void onResponseReceived(Request request, Response response) {
    JSONObject obj = (JSONObject) JSONParser.parseLenient(response.getText());

    for (String key : obj.keySet()) {
        JSONString val = (JSONString) obj.get(key);
        set(key, val.stringValue());
    }
}

As you can see I get a JSON-String. Parse it. Cast it to JSONObject. Take every key-value-pair and use the JSNI-method to set the pairs.

There must be an easier way to do this?! I want simply to say: $wnd["test"] = myJsonObject

Please help me, 'cause it is performance-critical step (up to 1000 key-value-pairs).

Answer 1

You can try using JSO (should be also much faster than JSONObject)
Something like this:

public native void set(JavaScriptObject data) /*-{
   $wnd['test'] = data;
}-*/;

public void onResponseReceived(Request request, Response response) {
    JavascriptObject data = JsonUtils.safeEval(response.getText()).case();
    set(data);
}

I haven't tried myself, so I can't say 100% if it would work.

Update:
Instead of a Dictionary you can directly return a JavaScriptObject that supports hash like access:

public class MyDictionary extends JavaScriptObject {

    public native String get(String name) /*-{
        return this[name];
    }-*/;
}

public native MyDictionary getData() /*-{
   return $wnd['test'];
}-*/