No worries Michael. I am grateful to the effort and help I am getting!
I am still getting ClassCastException after trying your code. The only
difference that I made was that I removed the JFile object and replaced it
with a File object:
Exception in thread "main" java.lang.ClassCastException:
com.vividsolutions.jts.geom.MultiPolygon cannot be cast to
com.vividsolutions.jts.geom.LineString
at
org.geotools.graph.build.line.LineStringGraphGenerator.add(LineStringGraphGenerator.java:54)
at
org.geotools.graph.build.feature.FeatureGraphGenerator.add(FeatureGraphGenerator.java:58)
at access.ShapeToGraph.main(ShapeToGraph.java:51)
Any clue this might be why?
Ahmed
On Mon, Mar 15, 2010 at 1:12 AM, Michael Bedward
<[email protected]>wrote:
> Hi Ahmed,
>
> Yes, sounds like it's time to update that wiki page and add an example
> app for the graph module. Sorry for the confusion but with only a
> small number of developers the docs tend to lag behind the code
> sometimes :-)
>
> I've modified your code and it runs successfully here. Please try it
> now and see if it works for you.
>
> Michael
>
>
> import java.io.File;
> import java.io.IOException;
> import org.geotools.data.FeatureSource;
> import org.geotools.data.FileDataStore;
> import org.geotools.data.FileDataStoreFinder;
> import org.geotools.feature.FeatureCollection;
> import org.geotools.feature.FeatureIterator;
> import org.geotools.graph.build.feature.FeatureGraphGenerator;
> import org.geotools.graph.build.line.LineStringGraphGenerator;
> import org.geotools.graph.structure.Graph;
> import org.geotools.swing.data.JFileDataStoreChooser;
> import org.opengis.feature.Feature;
>
> public class ShapeToGraph {
>
> /**
> * @param args
> * @throws IOException
> */
> public static void main(String[] args) {
> // TODO Auto-generated method stub
>
> File shapeFile = JFileDataStoreChooser.showOpenFile("shp", null);
>
> FileDataStore store = null;
> FeatureSource featureSource = null;
>
> // get a feature collection somehow
> FeatureCollection fCollection = null;
> try {
> store = FileDataStoreFinder.getDataStore(shapeFile);
> featureSource = store.getFeatureSource();
> fCollection = featureSource.getFeatures();
> } catch (IOException e) {
> // TODO Auto-generated catch block
> e.printStackTrace();
> }
>
> //create a linear graph generate
> LineStringGraphGenerator lineStringGen = new
> LineStringGraphGenerator();
>
> //wrap it in a feature graph generator
> FeatureGraphGenerator featureGen = new FeatureGraphGenerator(
> lineStringGen );
> //throw all the features into the graph generator
> FeatureIterator iter = fCollection.features();
> while(iter.hasNext()){
> Feature feature = iter.next();
> featureGen.add( feature );
> }
>
> Graph g = featureGen.getGraph();
>
> System.out.println(g.getNodes().size());
> }
> }
>
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