FR: Update LocationCallback about gwt-google-apis HOT 4 CLOSED

One way to handle this is to declare field marked 'final' to make a copy of the
address string, then you can reference it from inside your LocationCallback
implementation.  In the example below, I did this twice, to reference an 
InfoWindow
object as well:

  private void displayWithGeocoder(InfoWindow w, String address) {

    final String addressCopy = address;
    final InfoWindow wCopy = w;

    Geocoder g = new Geocoder();
    g.getLocations(address, new LocationCallback() {
      public void onFailure(int statusCode) {
        GWT.log("Error: "+statusCode+" Failed to retrieve address: "+addressCopy, 
            null);
      }
      public void onSuccess(Placemark[] locations) {
        GWT.log("Got "+locations.length+" locations returned. Address is " +
addressCopy, 
            null);
        if (locations.length > 0) {
          wCopy.open(locations[0].getPoint(), 
              new InfoWindowContent("Found :" + locations[0].getAddress()));
        }
      }
    });

  }

Now I am thinking we should change this callback model to use the handler/event
pattern that we're putting in to support GEvent.

If we do this, we will need to look at the following types which use a callback 
pattern:

DirectionsCallback, LatLngCallback, LocationCallback, GeoXMLLoadCallback

The Maps v2 API is now deprecated.