X-Git-Url: http://git.argeo.org/?a=blobdiff_plain;f=org.argeo.app.geo%2Fsrc%2Forg%2Fargeo%2Fapp%2Fgeo%2FGeoShapeUtils.java;h=d35492ad68d881b673b37e6a28b872f97003d440;hb=ef62b6f2aa5d42ae45865eed142ab1e69f6ae43f;hp=1db099bb8a4a03d56eee96e011fed968e4c8d7b1;hpb=efda92d76cd7ccce3925763bf95f68d7927ac5c7;p=gpl%2Fargeo-suite.git

diff --git a/org.argeo.app.geo/src/org/argeo/app/geo/GeoShapeUtils.java b/org.argeo.app.geo/src/org/argeo/app/geo/GeoShapeUtils.java
index 1db099b..d35492a 100644
--- a/org.argeo.app.geo/src/org/argeo/app/geo/GeoShapeUtils.java
+++ b/org.argeo.app.geo/src/org/argeo/app/geo/GeoShapeUtils.java
@@ -1,14 +1,63 @@
 package org.argeo.app.geo;
 
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import java.util.StringTokenizer;
+
 import org.locationtech.jts.geom.Coordinate;
 import org.locationtech.jts.geom.Geometry;
+import org.locationtech.jts.geom.GeometryFactory;
 import org.locationtech.jts.geom.LineString;
+import org.locationtech.jts.geom.MultiPoint;
 import org.locationtech.jts.geom.Point;
 import org.locationtech.jts.geom.Polygon;
 
 /** Utilities around ODK's GeoShape format */
 public class GeoShapeUtils {
 
+	@SuppressWarnings("unchecked")
+	public static <T> T geoShapeToGeometry(String geoShape, Class<T> clss) {
+		Objects.requireNonNull(geoShape);
+		GeometryFactory geometryFactory = JTS.GEOMETRY_FACTORY_WGS84;
+		List<Coordinate> coordinates = new ArrayList<>();
+		StringTokenizer stSeg = new StringTokenizer(geoShape.trim(), ";");
+		while (stSeg.hasMoreTokens()) {
+			StringTokenizer stPt = new StringTokenizer(stSeg.nextToken().trim(), " ");
+			String lat = stPt.nextToken();
+			String lng = stPt.nextToken();
+			String alt = stPt.nextToken();
+			// String precision = stPt.nextToken();
+			Coordinate coord;
+			if (!alt.equals("0.0")) {
+				coord = new Coordinate(Double.parseDouble(lat), Double.parseDouble(lng), Double.parseDouble(alt));
+			} else {
+				coord = new Coordinate(Double.parseDouble(lat), Double.parseDouble(lng));
+			}
+			coordinates.add(coord);
+		}
+		if (LineString.class.isAssignableFrom(clss)) {
+			LineString lineString = geometryFactory
+					.createLineString(coordinates.toArray(new Coordinate[coordinates.size()]));
+			return (T) lineString;
+		} else if (MultiPoint.class.isAssignableFrom(clss)) {
+			MultiPoint multiPoint = geometryFactory
+					.createMultiPointFromCoords(coordinates.toArray(new Coordinate[coordinates.size()]));
+			return (T) multiPoint;
+		} else if (Polygon.class.isAssignableFrom(clss)) {
+			Coordinate first = coordinates.get(0);
+			Coordinate last = coordinates.get(coordinates.size() - 1);
+			if (!(first.getX() == last.getX() && first.getY() == last.getY())) {
+				// close the line string
+				coordinates.add(first);
+			}
+			Polygon polygon = geometryFactory.createPolygon(coordinates.toArray(new Coordinate[coordinates.size()]));
+			return (T) polygon;
+		} else {
+			throw new IllegalArgumentException("Unsupported format " + clss);
+		}
+	}
+
 	/** Converts a {@link Geometry} with WGS84 coordinates to a GeoShape. */
 	public static String geometryToGeoShape(Geometry geometry) {
 		if (geometry instanceof Point point) {