[gdal-dev] Clip feature while query from .gdb using OpenFileGDB driver

[Yang]

I am using OpenFileGDB driver to read .gdb data through the java binding,core codes:


        Layer layer = dataSource.GetLayer("layer_name");
        layer.SetSpatialFilterRect(minx,miny,maxx,maxy);
        System.out.println(layer.GetFeatureCount());
        layer.ResetReading();
        Feature feature = layer.GetNextFeature();
        while (feature != null) {
            feature = layer.GetNextFeature();
            //
        }



Now for a given feature I want to get the intersection geometry from the bounding box (the same as that used in the spatial filter), when using PostGIS, I can do that by


select ST_Intersect(geom,bbox) as clipped_geom from xx where geom && bbox.


So when using OpenFileGDB:


1 Can it do the intersection during the querying?


2 If not, does it mean I have to do the clip in java by myself? Does gdal provide some api?
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