RegionChooser: Test with xmin, xmax, ymin and ymax for buildings.

src/eu/simstadt/regionchooser/RegionExtractor.java

@@ -5,7 +5,9 @@
 import java.util.logging.Logger;
 import javax.xml.stream.XMLStreamException;
 import org.xml.sax.SAXParseException;
+import com.vividsolutions.jts.geom.Coordinate;
 import com.vividsolutions.jts.geom.Geometry;
+import com.vividsolutions.jts.geom.GeometryFactory;
 import com.vividsolutions.jts.geom.Point;
 import com.vividsolutions.jts.io.ParseException;
 import com.vividsolutions.jts.io.WKTReader;
@@ -21,6 +23,7 @@
 	static private WKTReader wktReader = new WKTReader();
 
 	private static final Logger LOGGER = Logger.getLogger(RegionExtractor.class.getName());
+	private static final GeometryFactory gf = new GeometryFactory();
 
 	static public StringBuffer selectRegionDirectlyFromCityGML(Path citygmlPath, String wktPolygon, String srsName)
 			throws SAXParseException, XMLStreamException, ParseException, XPathParseException, NavException,
@@ -37,7 +40,8 @@ static public StringBuffer selectRegionDirectlyFromCityGML(Path citygmlPath, Str
 				sb.append(citygml.getHeader());
 			}
 			buildingsCount += 1;
-			Point point = buildingXmlNode.getCenterOfMass();
+			Coordinate coord = new Coordinate(buildingXmlNode.x, buildingXmlNode.y);
+			Point point = gf.createPoint(coord); //NOTE: Should it be in buildingXmlNode?
 			if (point.within(poly)) {
 				foundBuildingsCount++;
 				sb.append(buildingXmlNode.toString());

src/eu/simstadt/regionchooser/citygml_parser/BuildingXmlNode.java

 package eu.simstadt.regionchooser.citygml_parser;
 
-import com.vividsolutions.jts.geom.Coordinate;
-import com.vividsolutions.jts.geom.GeometryFactory;
-import com.vividsolutions.jts.geom.Point;
 import com.ximpleware.AutoPilot;
 import com.ximpleware.NavException;
 import com.ximpleware.VTDNav;
@@ -17,19 +14,32 @@
 	private int buildingLength;
 	private VTDNav navigator;
 	private AutoPilot coordinatesFinder;
-	private static final GeometryFactory gf = new GeometryFactory();
+	public Double x;
+	public Double xMin;
+	public Double xMax;
+	public Double yMin;
+	public Double yMax;
+	public Double y;
 
-	public BuildingXmlNode(VTDNav navigator, int buildingOffset, int buildingLength) {
+	public BuildingXmlNode(VTDNav navigator, int buildingOffset, int buildingLength)
+			throws NumberFormatException, XPathParseException, XPathEvalException, NavException {
 		this.navigator = navigator;
 		this.coordinatesFinder = new AutoPilot(navigator);
 		this.buildingLength = buildingLength;
 		this.buildingOffset = buildingOffset;
+		extractCoordinates(); //NOTE: Should it be done lazily? Is there any reason to extract a BuildingXmlNode without coordinates?
 	}
 
-	public Point getCenterOfMass() throws XPathParseException, NumberFormatException, XPathEvalException, NavException {
+	private void extractCoordinates()
+			throws XPathParseException, NumberFormatException, XPathEvalException, NavException {
 		int coordinatesCount = 0;
 		double xTotal = 0;
 		double yTotal = 0;
+		double x, y;
+		double xMin = Double.MAX_VALUE;
+		double xMax = Double.MIN_VALUE;
+		double yMin = Double.MAX_VALUE;
+		double yMax = Double.MIN_VALUE;
 
 		coordinatesFinder.selectXPath(".//posList|.//pos");
 		while (coordinatesFinder.evalXPath() != -1) {
@@ -40,15 +50,30 @@ public Point getCenterOfMass() throws XPathParseException, NumberFormatException
 			String[] coordinates = posList.trim().split("\\s+");
 			for (int k = 0; k < coordinates.length; k = k + 3) {
 				coordinatesCount++;
-				xTotal += Double.valueOf(coordinates[k]);
-				yTotal += Double.valueOf(coordinates[k + 1]);
+				x = Double.valueOf(coordinates[k]);
+				y = Double.valueOf(coordinates[k + 1]);
+				if (x < xMin) {
+					xMin = x;
+				}
+				if (y < yMin) {
+					yMin = y;
+				}
+				if (x > xMax) {
+					xMax = x;
+				}
+				if (y > yMax) {
+					yMax = y;
+				}
+				xTotal += x;
+				yTotal += y;
 			}
 		}
-
-		double x = xTotal / coordinatesCount;
-		double y = yTotal / coordinatesCount;
-		Coordinate coord = new Coordinate(x, y);
-		return gf.createPoint(coord);
+		this.xMin = xMin;
+		this.xMax = xMax;
+		this.yMin = yMin;
+		this.yMax = yMax;
+		this.x = xTotal / coordinatesCount;
+		this.y = yTotal / coordinatesCount;
 	}
 
 	public String toString() {
@@ -58,5 +83,4 @@ public String toString() {
 			return null;
 		}
 	}
-
 }

src/eu/simstadt/regionchooser/citygml_parser/CityGmlIterator.java

@@ -63,7 +63,7 @@ public BuildingXmlNode next() {
 					buildingOffset = (int) offsetAndLength;
 					buildingLength = (int) (offsetAndLength >> 32);
 					return new BuildingXmlNode(navigator, buildingOffset, buildingLength);
-				} catch (NavException ex) {
+				} catch (NavException | NumberFormatException | XPathParseException | XPathEvalException ex) {
 					LOGGER.warning("Error while parsing " + citygmlPath);
 				}
 				return null;

test/eu/simstadt/regionchooser/test/CitygmlParserTests.java

 package eu.simstadt.regionchooser.test;
 
 import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
 import java.io.IOException;
 import java.nio.file.Path;
 import java.nio.file.Paths;
@@ -18,10 +19,16 @@ private void testNoNanInCoordinates(Path citygmlPath)
 			throws NumberFormatException, XPathParseException, NavException, XPathEvalException, IOException {
 		CityGmlIterator buildingXmlNodes = new CityGmlIterator(citygmlPath);
 		for (BuildingXmlNode buildingXmlNode : buildingXmlNodes) {
-			double x = buildingXmlNode.getCenterOfMass().getX();
-			double y = buildingXmlNode.getCenterOfMass().getY();
-			assertFalse("Coordinate should be a double", Double.isNaN(x));
-			assertFalse("Coordinate should be a double", Double.isNaN(y));
+			assertFalse("Coordinate should be a double", Double.isNaN(buildingXmlNode.x));
+			assertFalse("Coordinate should be a double", Double.isNaN(buildingXmlNode.y));
+			assertFalse("Coordinate should be a double", Double.isNaN(buildingXmlNode.xMax));
+			assertFalse("Coordinate should be a double", Double.isNaN(buildingXmlNode.yMax));
+			assertFalse("Coordinate should be a double", Double.isNaN(buildingXmlNode.xMin));
+			assertFalse("Coordinate should be a double", Double.isNaN(buildingXmlNode.yMin));
+			assertTrue("Coordinates Min/Max should be plausible", buildingXmlNode.xMax > buildingXmlNode.x);
+			assertTrue("Coordinates Min/Max should be plausible", buildingXmlNode.yMax > buildingXmlNode.y);
+			assertTrue("Coordinates Min/Max should be plausible", buildingXmlNode.xMin < buildingXmlNode.x);
+			assertTrue("Coordinates Min/Max should be plausible", buildingXmlNode.yMin < buildingXmlNode.y);
 		}
 
 	}