Add Nominatim reverse geocoding (fix #615)

3 files changed, 64 insertions, 2 deletions

diff --git a/src/org/traccar/ServerManager.java b/src/org/traccar/ServerManager.java
index 4e5b283d4..1dfe5e3d6 100644
--- a/src/org/traccar/ServerManager.java
+++ b/src/org/traccar/ServerManager.java
@@ -36,6 +36,7 @@ import org.jboss.netty.handler.codec.http.HttpResponseEncoder;
 import org.jboss.netty.handler.codec.string.StringDecoder;
 import org.jboss.netty.handler.codec.string.StringEncoder;
 import org.traccar.geocode.GoogleReverseGeocoder;
+import org.traccar.geocode.NominatimReverseGeocoder;
 import org.traccar.geocode.ReverseGeocoder;
 import org.traccar.helper.Log;
 import org.traccar.http.WebServer;
@@ -199,7 +200,13 @@ public class ServerManager {
 
     private void initGeocoder(Properties properties) throws IOException {
         if (Boolean.parseBoolean(properties.getProperty("geocoder.enable"))) {
-            reverseGeocoder = new GoogleReverseGeocoder();
+            String type = properties.getProperty("geocoder.type");
+            if (type != null && type.equals("nominatim")) {
+                reverseGeocoder = new NominatimReverseGeocoder(
+                        getProperties().getProperty("geocoder.url"));
+            } else {
+                reverseGeocoder = new GoogleReverseGeocoder();
+            }
         }
     }
 
diff --git a/src/org/traccar/geocode/GoogleReverseGeocoder.java b/src/org/traccar/geocode/GoogleReverseGeocoder.java
index 9aebbf8a0..4ec6e10af 100644
--- a/src/org/traccar/geocode/GoogleReverseGeocoder.java
+++ b/src/org/traccar/geocode/GoogleReverseGeocoder.java
@@ -16,6 +16,7 @@
 package org.traccar.geocode;
 
 import java.io.BufferedReader;
+import java.io.IOException;
 import java.io.InputStreamReader;
 import java.net.URL;
 import java.net.URLConnection;
@@ -49,7 +50,7 @@ public class GoogleReverseGeocoder implements ReverseGeocoder {
 
             reader.close();
 
-        } catch(Exception error) {
+        } catch(IOException error) {
             Log.warning(error);
         }
 
diff --git a/src/org/traccar/geocode/NominatimReverseGeocoder.java b/src/org/traccar/geocode/NominatimReverseGeocoder.java
new file mode 100644
index 000000000..c9393da42
--- /dev/null
+++ b/src/org/traccar/geocode/NominatimReverseGeocoder.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2014 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.net.URL;
+import java.net.URLConnection;
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+
+import org.traccar.helper.Log;
+import org.w3c.dom.Document;
+
+public class NominatimReverseGeocoder implements ReverseGeocoder {
+
+    private final String url;
+    
+    public NominatimReverseGeocoder(String url) {
+        this.url = url + "?format=xml&lat=%f&lon=%f&zoom=18&addressdetails=0";
+    }
+
+    @Override
+    public String getAddress(double latitude, double longitude) {
+        
+        try {
+
+            URLConnection conn = new URL(String.format(url, latitude, longitude)).openConnection();
+
+            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
+            DocumentBuilder builder = factory.newDocumentBuilder();
+            Document doc = builder.parse(conn.getInputStream());
+            
+            return doc.getFirstChild().getLastChild().getFirstChild().getNodeValue();
+
+        } catch(Exception error) {
+            Log.warning(error);
+        }
+
+        return null;
+    }
+
+}