Implement OpenStreetMap API call to retrieve the GPS location of any adress

src/main/java/fr/u_paris/gla/project/utils/ApiUtils.java

@@ -0,0 +1,54 @@
+package fr.u_paris.gla.project.utils;
+
+import fr.u_paris.gla.project.idfm.IDFMNetworkExtractor;
+import org.json.JSONArray;
+import org.json.JSONObject;
+
+import java.io.*;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+public class ApiUtils {
+    /** The logger for information on the process */
+    private static final Logger LOGGER = Logger
+            .getLogger(IDFMNetworkExtractor.class.getName());
+
+    // OpenStreetMap API URL
+    private static final String OSM_URL = "https://nominatim.openstreetmap.org/search";
+
+    public static double[] getGPSLocation(String term) {
+        try {
+            String urlString = String.format("%s?q=%s&format=json", OSM_URL, URLEncoder.encode(term, StandardCharsets.UTF_8));
+            HttpURLConnection connection = (HttpURLConnection) new URL(urlString).openConnection();
+
+            connection.setRequestMethod("GET");
+
+            BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
+            String inputLine;
+            StringBuilder response = new StringBuilder();
+
+            while ((inputLine = in.readLine()) != null) {
+                response.append(inputLine);
+            }
+
+            JSONArray jsonArray = new JSONArray(response.toString());
+
+            if (!jsonArray.isEmpty()) {
+                JSONObject firstResult = jsonArray.getJSONObject(0);
+
+                double lat = firstResult.getDouble("lat");
+                double lon = firstResult.getDouble("lon");
+                return new double[]{lat, lon};
+            }
+        }
+        catch (IOException e) {
+            LOGGER.log(Level.SEVERE, e,
+                    () -> "Error accessing the API");
+        }
+        return new double[]{0, 0};
+    }
+}