Thanks a lot Oleksandr! That makes sense.
However i have another question, apparently i get a new error when i try to
run the project with only one line and it looks like this:  Unable to
determine bounds of org.geotools.map.FeatureLayer[, VISIBLE]
java.lang.NullPointerException

Not sure where the problem is since my collection contains at least one
line to add to the layer. Or am i wrong?


On Tue, Apr 29, 2014 at 3:20 PM, Oleksandr Huziy <guziy.sa...@gmail.com>wrote:

> I think one feature is supposed to have only one geometry object. If you
> want to represent multiple lines with a single geometry use
> MultiLineString..
>
>
> Cheers
>
>
> 2014-04-29 8:24 GMT-04:00 Elena Pop <elena0...@gmail.com>:
>
>>  Hello,
>>
>> I am working on a project that builds up a graph and due to some errors i
>> am trying to visualize it.
>>
>> The code looks like this and apparently it is not working because i get
>> this error "java.lang.ArrayIndexOutOfBoundsException: Can handle 1
>> attributes only, index is 1" on line featureBuilder.add(line);
>>
>>             networkGraph = featureGen.getGraph();
>>             MapContent content= new MapContent();
>>             content.setTitle("Graph map");
>>
>>             StyleBuilder styleBuilder = new StyleBuilder();
>>             Style style =
>> styleBuilder.createStyle(styleBuilder.createPointSymbolizer());
>>
>>             SimpleFeatureTypeBuilder tbuild = new
>> SimpleFeatureTypeBuilder();
>>             tbuild.setCRS(DefaultGeographicCRS.WGS84);
>>             tbuild.setName("Line");
>>             tbuild.add("Line", LineString.class);
>>             SimpleFeatureType type = tbuild.buildFeatureType();
>>                 SimpleFeatureBuilder featureBuilder = new
>> SimpleFeatureBuilder(type);
>>                 GeometryFactory geometryFactory =
>> JTSFactoryFinder.getGeometryFactory(null);
>>
>>
>>             Collection<org.geotools.graph.structure.Edge> edges =
>> networkGraph.getEdges();
>>             for(org.geotools.graph.structure.Edge edge:edges){
>>                 Point nA = (Point) edge.getNodeA().getObject();
>>                 Point nB = (Point) edge.getNodeB().getObject();
>>
>>                 Coordinate c1 = new Coordinate(nA.getX(), nA.getY());
>>                 Coordinate c2 = new Coordinate(nB.getX(), nB.getY());
>>
>>                 Coordinate[] coords = new Coordinate[] {c1, c2};
>>                 com.vividsolutions.jts.geom.LineString line =
>> geometryFactory.createLineString(coords);
>>                 featureBuilder.add(line);
>>                 //System.out.println( nA.getX()+ "  "+nA.getY());
>>
>>             }
>>
>>             SimpleFeature feature =  featureBuilder.buildFeature(null);
>>             DefaultFeatureCollection collection =new
>> DefaultFeatureCollection();
>>             collection.add(feature);
>>             content.addLayer(new FeatureLayer(collection,
>> (org.geotools.styling.Style) style));
>>
>>             JMapFrame.showMap(content);
>>
>>     I am still trying to get used to geotools, sorry if the question
>> sounds stupid.
>>     Looking forward to your reply.
>>
>>
>> ------------------------------------------------------------------------------
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>
>
> --
> Sasha
>
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