2009/3/16 Didrik Pinte <[email protected]>:
> Hi list,
Hi
> We have an application that is linked to a servlet that generates a
> GeoJSON stream. In some situations, the stream is empty.
>
> Looking a Format/GeoJSON.js, I cannot find the correct way to provide a
> valid GeoJSON stream that containts no features. A FeatureCollection
> with no feature raise an error, an empty string raises an error too.
>
> What is the best practice for that kind of situation ?
Consider using OpenLayers.Protocol.HTTP.
var protocol = new OpenLayers.Protocol.HTTP({
url: "url-to-your-service",
format: new OpenLayers.Format.GeoJSON()
});
protocol.read({
callback: function(response) {
var features = response.features;
// features will be null if the GeoJSON stream is empty
}
});
Hope that helps,
--
Eric
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