Geofences

1 files changed, 82 insertions, 0 deletions

diff --git a/src/org/traccar/geofence/GeofenceCircle.java b/src/org/traccar/geofence/GeofenceCircle.java
new file mode 100644
index 000000000..76d5a2816
--- /dev/null
+++ b/src/org/traccar/geofence/GeofenceCircle.java
@@ -0,0 +1,82 @@
+package org.traccar.geofence;
+
+import java.text.DecimalFormat;
+import java.text.ParseException;
+
+import org.traccar.helper.DistanceCalculator;
+
+public class GeofenceCircle extends GeofenceGeometry {
+
+    private double centerLatitude;
+    private double centerLongitude;
+    private double radius;
+
+    public GeofenceCircle() {
+        super();
+    }
+
+    public GeofenceCircle(String wkt) throws ParseException {
+        super();
+        fromWKT(wkt);
+    }
+
+    public GeofenceCircle(double latitude, double longitude, double radius) {
+        super();
+        this.centerLatitude = latitude;
+        this.centerLongitude = longitude;
+        this.radius = radius;
+    }
+
+    @Override
+    public boolean containsPoint(double latitude, double longitude) {
+        return DistanceCalculator.distance(centerLatitude, centerLongitude, latitude, longitude) <= radius;
+    }
+
+    @Override
+    public String toWKT() {
+        String wkt = "";
+        wkt = "CIRCLE (";
+        wkt += String.valueOf(centerLatitude);
+        wkt += " ";
+        wkt += String.valueOf(centerLongitude);
+        wkt += ", ";
+        DecimalFormat format = new DecimalFormat("0.#");
+        wkt += format.format(radius);
+        wkt += ")";
+        return wkt;
+    }
+
+    @Override
+    public void fromWKT(String wkt) throws ParseException {
+        if (!wkt.startsWith("CIRCLE")) {
+            throw new ParseException("Mismatch geometry type", 0);
+        }
+        String content = wkt.substring(wkt.indexOf("(") + 1, wkt.indexOf(")"));
+        if (content == null || content.equals("")) {
+            throw new ParseException("No content", 0);
+        }
+        String[] commatokens = content.split(",");
+        if (commatokens.length != 2) {
+            throw new ParseException("Not valid content", 0);
+        }
+        String[] tokens = commatokens[0].split("\\s");
+        if (tokens.length != 2) {
+            throw new ParseException("Too much or less coordinates", 0);
+        }
+        try {
+            centerLatitude = Double.parseDouble(tokens[0]);
+        } catch (NumberFormatException e) {
+            throw new ParseException(tokens[0] + " is not a double", 0);
+        }
+        try {
+            centerLongitude = Double.parseDouble(tokens[1]);
+        } catch (NumberFormatException e) {
+            throw new ParseException(tokens[1] + " is not a double", 0);
+        }
+        try {
+            radius = Double.parseDouble(commatokens[1]);
+        } catch (NumberFormatException e) {
+            throw new ParseException(commatokens[1] + " is not a double", 0);
+        }
+    }
+}