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/*
* 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 java.nio.charset.Charset;
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();
connection.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(),Charset.forName("UTF-8")));
// 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;
}
}
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