/*
* Copyright 2009 Google Inc.
*
* 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.gtugs.service;
import org.gtugs.domain.Point;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.JSONValue;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
/**
* @author jasonacooper@google.com (Jason Cooper)
*/
public class GoogleMapsService implements MapsService {
protected String key;
public GoogleMapsService() {
this(null);
}
public GoogleMapsService(String key) {
this.key = key;
}
public Point getCoordinates(String location, String country) {
return getCoordinates(location, null, country);
}
public Point getCoordinates(String city, String state, String country) {
return getCoordinates(null, city, state, country);
}
public Point getCoordinates(String address, String city, String state,
String country) {
StringBuilder queryString = new StringBuilder();
StringBuilder urlString = new StringBuilder();
StringBuilder response = new StringBuilder();
if (address != null) {
queryString.append(address.trim().replaceAll(" ", "+"));
queryString.append("+");
}
if (city != null) {
queryString.append(city.trim().replaceAll(" ", "+"));
queryString.append("+");
}
if (state != null) {
queryString.append(state.trim().replaceAll(" ", "+"));
queryString.append("+");
}
if (country != null) {
queryString.append(country.replaceAll(" ", "+"));
}
urlString.append("http://maps.google.com/maps/geo?key=");
urlString.append(key);
urlString.append("&sensor=false&output=json&oe=utf8&q=");
urlString.append(queryString.toString());
try {
URL url = new URL(urlString.toString());
BufferedReader reader =
new BufferedReader(new InputStreamReader(url.openStream()));
String line;
while ((line = reader.readLine()) != null) {
response.append(line);
}
reader.close();
JSONObject root = (JSONObject) JSONValue.parse(response.toString());
JSONObject placemark =
(JSONObject) ((JSONArray) root.get("Placemark")).get(0);
JSONArray coordinates =
(JSONArray) ((JSONObject) placemark.get("Point")).get("coordinates");
Point point = new Point();
point.setLatitude((Double) coordinates.get(1));
point.setLongitude((Double) coordinates.get(0));
return point;
} catch (MalformedURLException ex) {
return null;
} catch (NullPointerException ex) {
return null;
} catch(IOException ex) {
return null;
}
}
public void setKey(String key) {
this.key = key;
}
}