/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.graph.build.polygon;
import java.util.StringTokenizer;
import junit.framework.TestCase;
import org.geotools.graph.build.basic.BasicGraphBuilder;
import org.geotools.graph.structure.Graph;
import org.geotools.graph.structure.Node;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.Polygon;
/**
*
*
* @source $URL$
*/
public class PolygonGraphGeneratorTest extends TestCase {
static GeometryFactory gf = new GeometryFactory();
PolygonGraphGenerator gg;
protected void setUp() throws Exception {
super.setUp();
PolygonGraphGenerator.PolygonRelationship rel =
new PolygonGraphGenerator.PolygonRelationship() {
public boolean related(Polygon p1, Polygon p2) {
return p1.intersects(p2);
}
public boolean equal(Polygon p1, Polygon p2) {
return p1.equalsTopo(p2);
}
};
gg = new PolygonGraphGenerator(new BasicGraphBuilder(),rel);
}
public void testAdd() {
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");
Node n1 = (Node) gg.add(p1);
Node n2 = (Node) gg.add(p2);
Node n3 = (Node) gg.add(p3);
assertNotNull(n1);
assertEquals(n1.getObject(),p1);
assertNotNull(n2);
assertEquals(n2.getObject(),p2);
assertNotNull(n3);
assertEquals(n3.getObject(),p3);
Graph g = gg.getGraph();
assertEquals(3,g.getNodes().size());
assertEquals(0,g.getEdges().size());
}
public void testRelationships() {
Polygon p1 = createPolygon("0 0,5 0,5 5,0 5,0 0");
Polygon p2 = createPolygon("4 4,9 4,9 9,4 9,4 4");
Polygon p3 = createPolygon("2 2,7 2,7 -3,2 -3,2 2");
Node n1 = (Node) gg.add(p1);
Node n2 = (Node) gg.add(p2);
Node n3 = (Node) gg.add(p3);
assertNotNull(n1.getEdge(n2));
assertNotNull(n2.getEdge(n1));
assertNotNull(n1.getEdge(n3));
assertNotNull(n2.getEdge(n1));
assertNull(n2.getEdge(n3));
assertNull(n2.getEdge(n2));
Graph g = gg.getGraph();
assertEquals(3,g.getNodes().size());
assertEquals(2,g.getEdges().size());
}
protected Polygon createPolygon(String coordinates) {
StringTokenizer tokens = new StringTokenizer(coordinates,",");
Coordinate[] c = new Coordinate[tokens.countTokens()];
int i = 0;
while(tokens.hasMoreTokens()) {
String token = tokens.nextToken();
String[] oordinates = token.split(" ");
c[i++] = new Coordinate(
Double.parseDouble(oordinates[0]),
Double.parseDouble(oordinates[1])
);
}
return gf.createPolygon(gf.createLinearRing(c), null);
}
}