[Gwt-openlayers-users] Fetching VectorFeatures via WFS and parsing GML

[Mikael C. <mik...@cl...>]

Hi all,


I'll be working on a project involving GWT-OL in the following weeks, and I
could use a little advice on how I am going to proceed.

To be quick, I'll be displaying regions on a map, and the color of each
region will be dynamically calculated on the fly based on GWT server-side
values. To complicate things up, some regions will be groups of regions,
also defined on the GWT server.
My first idea was to set up a GeoServer and fetch the features with WFS
GetFeature requests. From there I could display the features with whatever
style I wanted, and I could even make groups using
OpenLayers.Geometry.Collection<http://dev.openlayers.org/releases/OpenLayers-2.8/doc/apidocs/files/OpenLayers/Geometry/Collection-js.html#OpenLayers.Geometry.Collection.OpenLayers.Geometry.Collection>
.calculateBounds<http://dev.openlayers.org/releases/OpenLayers-2.8/doc/apidocs/files/OpenLayers/Geometry/Collection-js.html#OpenLayers.Geometry.Collection.calculateBounds>(or
so I hope I could).

But then I couldn't find a simple way to get features (and not layers) from
WFS, and I could'nt even manage to parse my GML with the corresponding GML3
class. I'm feeling a bit helpless...

The way I see it now, if I stay stuck, here's what I'll have to do :
Fetch the features with
com.google.gwt.http.client<http://google-web-toolkit.googlecode.com/svn/javadoc/1.6/com/google/gwt/http/client/package-frame.html>
Parse the GML with
com.google.gwt.xml.client<http://google-web-toolkit.googlecode.com/svn/javadoc/1.6/com/google/gwt/xml/client/package-frame.html>
And from that extract the posList, then generate the points, from that
instantiate the LinearRings and then I'll have my features. I feel like I
might be reinventing the wheel somewhere.

Just to give you the idea, my dream object would be like :
List<VectorFeature> features = *MyDreamObject*
.getFeaturesFromRemoteGML(WFS_URL);*
*
Has anyone ever tried something similar ?
Do you know anything that could help me ?
Any help would be MOST appreciated.

Thanks !


-- 
Mikael