[Geotools-gt2-users] FeatureGraphGenerator - build with a PolygonGraphGenerator?

[Emmanuel B. <emm...@gm...>]

Hello,

I have a polygon layer for which I would like to produce a Polygon 
graph. I've been trying to use the PolygonGraphGenerator, but this one 
builds a "geometry" graph, while I would like to build it on features. I 
could see that there is a FeatureGraphGenerator, that decorates a graph 
generator that builds a graph from geometries. But it does not seem to 
work if the GraphGenerator is a PolygonGraphGenerator, apparently 
because the PolygonGraphGenerator methods take a Polygon object as 
parameters:

/Exception in thread "main" java.lang.ClassCastException: 
org.geotools.feature.simple.SimpleFeatureImpl cannot be cast to 
com.vividsolutions.jts.geom.Polygon
     at 
org.geotools.graph.build.polygon.PolygonGraphGenerator.find(PolygonGraphGenerator.java:157)
     at 
org.geotools.graph.build.polygon.PolygonGraphGenerator.get(PolygonGraphGenerator.java:125)
     at 
org.geotools.graph.build.polygon.PolygonGraphGenerator.add(PolygonGraphGenerator.java:108)
     at 
org.geotools.graph.build.feature.FeatureGraphGenerator.add(FeatureGraphGenerator.java:59)/

Could somebody give me advice on this?

Thanks in advance,
Cheers
Emmanuel