| => Test Code
public void testIsolatedNodeAdd() throws Exception {
gg = new PolygonGraphGenerator(new BasicGraphBuilder(), rel);
fgg = new FeatureGraphGenerator( gg ); Polygon p1 = createPolygon("0 0,1 1,2 2,0 0");
Polygon p2 = createPolygon("3 3,4 4,5 5,3 3");
Polygon p3 = createPolygon("6 6,7 7,8 8,6 6"); Polygon[] ps = { p1, p2, p3 } ;
SimpleFeature[] features = features( ps ); Node n1 = (Node) fgg.add(features[0]);
Node n2 = (Node) fgg.add(features[1]);
Node n3 = (Node) fgg.add(features[2]); assertNotNull(n1);
assertEquals(n1.getObject(),features[0]); assertNotNull(n2);
assertEquals(n2.getObject(),features[1]); assertNotNull(n3);
assertEquals(n3.getObject(),features[2]); Graph g = fgg.getGraph();
assertNotNull(g);
} FeatureGraphGenerator decorates PolygonGraphGenerator.
In case of adding node, FeatureGraphGenerator makes Graphable object with Polygon geometry by decorate generator.
After making Graphable object, FeatureGraphGenerator changes it's object to feature(SimpleFeature). => Method in FeatureGraphGenerator
public Graphable add( Object obj ) { SimpleFeature feature = (SimpleFeature) obj; Graphable g = decorated.add( feature.getDefaultGeometry() ); Geometry geom = (Geometry) g.getObject(); //Preserve geometry from Graphable, as it may be changed. feature.setDefaultGeometry(geom); *g.setObject( feature );* return g; } When finding Node in PolygonGraphGenerator, it assume that found node has Polygon object.
but actually, Node has SimpleFeatureImpl, so it throws ClassCastExcpetion. => Method in PolygonGraphGenerator
protected Node find(Polygon polygon) {
List close = index.query(polygon.getEnvelopeInternal());
for (Iterator itr = close.iterator(); itr.hasNext()![]() {
Node node = (Node)itr.next();
Polygon p = (Polygon)node.getObject(); if (rel.equal(polygon,p)) { return node; } } return null;
} |
