RegionChooser: Some gmls have missing Z in envelope.

src/eu/simstadt/regionchooser/RegionExtractor.java

@@ -98,8 +98,14 @@ private static String replaceEnvelopeInHeader(String header, Envelope envelope,
 		String headerWithoutEnvelope = header;
 		if (matcher.find()) {
 			headerWithoutEnvelope = matcher.replaceFirst("");
-			zMin = Double.valueOf(matcher.group(1).split("\\s+")[2]);
-			zMax = Double.valueOf(matcher.group(2).split("\\s+")[2]);
+			String[] mins = matcher.group(1).split("\\s+");
+			String[] maxs = matcher.group(2).split("\\s+");
+			if (mins.length > 2) {
+				zMin = Double.valueOf(mins[2]);
+			}
+			if (maxs.length > 2) {
+				zMax = Double.valueOf(maxs[2]);
+			}
 		}
 		String newEnvelope = "<gml:boundedBy>\r\n" +
 				"  <gml:Envelope srsName=\"" + srsName + "\" srsDimension=\"3\">\r\n" + //NOTE: Would srsDimension="2" be better? Should the original Z get extracted?

test/eu/simstadt/regionchooser/RegionExtractorTests.java

@@ -125,15 +125,13 @@ public void testExtract0BuildingsFromWeirdGML() throws Throwable {
 		assertTrue(emptyGMLString.contains("</core:CityModel")); // Footer
 	}
 
-	//TODO: Add BuildingParts tests with StuttgartAroundCampus.
 	@Test
-	public void testExtractBuildingsFromCitygmlWithBuildingParts() throws Throwable {
-		//NOTE: Small region, with too many spaces between coordinates
+	public void testExtractBuildingsFromCitygmlWithoutZinEnvelope() throws Throwable {
 		String wktPolygon = "POLYGON((3512683.1280912133 5404783.732132129,3512719.1608604863 5404714.627650777,3512831.40076119 5404768.344155442,3512790.239106708 5404838.614891164,3512683.1280912133 5404783.732132129))";
 		Path repo = Paths.get("../TestRepository");
-		Path citygmlPath = repo.resolve("Stuttgart.proj/Stuttgart_LOD0_LOD1_around_campus.gml");
+		Path citygmlPath = repo.resolve("Stuttgart.proj/Stuttgart_LOD0_LOD1_small.gml");
 		String emptyGMLString = RegionExtractor.selectRegionDirectlyFromCityGML(citygmlPath, wktPolygon, "EPSG:31463")
 				.toString();
-		assertEquals(countRegexMatches(emptyGMLString, "<(core:)?cityObjectMember"), 2);
+		assertEquals(countRegexMatches(emptyGMLString, "<bldg:Building gml:id"), 2);
 	}
 }