Add reverse geocoding

3 files changed, 107 insertions, 0 deletions

diff --git a/src/org/traccar/geocode/GoogleReverseGeocoder.java b/src/org/traccar/geocode/GoogleReverseGeocoder.java
new file mode 100644
index 000000000..724c60e50
--- /dev/null
+++ b/src/org/traccar/geocode/GoogleReverseGeocoder.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2012 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.geocode;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.net.URL;
+import java.net.URLConnection;
+import org.traccar.helper.Log;
+
+/**
+ * Reverse geocoder implementation using Google
+ */
+public class GoogleReverseGeocoder implements ReverseGeocoder {
+
+    private final static String MARKER = "\"formatted_address\" : \"";
+
+    /**
+     * Get address string by coordinates
+     */
+    public String getAddress(double latitude, double longitude) {
+
+        try {
+            URL url = new URL("http://maps.googleapis.com/maps/api/geocode/json?latlng=" + latitude + "," + longitude + "&sensor=false");
+            URLConnection connection = url.openConnection();
+            BufferedReader reader = new BufferedReader(
+                    new InputStreamReader(connection.getInputStream()));
+
+            // Find address line
+            String line;
+            while ((line = reader.readLine()) != null) {
+                int index = line.indexOf(MARKER);
+                if (index != -1) {
+                    return line.substring(index + MARKER.length(), line.length() - 2);
+                }
+            }
+
+            reader.close();
+
+        } catch(Exception error) {
+            Log.warning(error.getMessage());
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/org/traccar/geocode/ReverseGeocoder.java b/src/org/traccar/geocode/ReverseGeocoder.java
new file mode 100644
index 000000000..d8ea5d7ab
--- /dev/null
+++ b/src/org/traccar/geocode/ReverseGeocoder.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2012 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.geocode;
+
+/**
+ * Reverse geocoder interface
+ */
+public interface ReverseGeocoder {
+
+    /**
+     * Get address string by coordinates
+     */
+    public String getAddress(double latitude, double longitude);
+
+}
diff --git a/test/org/traccar/geocode/GoogleReverseGeocoderTest.java b/test/org/traccar/geocode/GoogleReverseGeocoderTest.java
new file mode 100644
index 000000000..75e4dad72
--- /dev/null
+++ b/test/org/traccar/geocode/GoogleReverseGeocoderTest.java
@@ -0,0 +1,19 @@
+package org.traccar.geocode;
+
+import static org.junit.Assert.assertEquals;
+import org.junit.Test;
+
+public class GoogleReverseGeocoderTest {
+
+    @Test
+    public void testGetAddress() {
+
+        ReverseGeocoder reverseGeocoder = new GoogleReverseGeocoder();
+
+        assertEquals(
+                "Novotsentral'naya ulitsa, Saint Petersburg, Russia",
+                reverseGeocoder.getAddress(60.0, 30.0));
+
+    }
+
+}