98 lines
2.2 KiB
Java
98 lines
2.2 KiB
Java
package eirb.pg203;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.net.HttpURLConnection;
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import java.net.URI;
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import java.net.URL;
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import org.json.JSONArray;
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import org.json.JSONObject;
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import eirb.pg203.utils.Coords;
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class City {
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private String cityName;
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private Coords cityCoords;
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/**
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* Fetch data from adresse.data.gouv.fr
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* @throws IOException if the request fails
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*/
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private static JSONObject getDataFromName(String cityName) throws IOException {
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StringBuilder result = new StringBuilder();
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URL url = URI.create(
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String.format("https://api-adresse.data.gouv.fr/search/?q=%s&autocomplete=0&limit=1",
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cityName
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)
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).toURL();
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HttpURLConnection conn = (HttpURLConnection) url.openConnection();
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conn.setRequestMethod("GET");
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try (BufferedReader reader = new BufferedReader(
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new InputStreamReader(conn.getInputStream()))) {
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for (String line; (line = reader.readLine()) != null; ) {
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result.append(line);
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}
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}
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return new JSONObject(result.toString());
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}
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private static Coords getCoordsFromName(String cityName) throws IOException {
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JSONObject data = getDataFromName(cityName);
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JSONArray rawCoords = data.getJSONArray("features")
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.getJSONObject(0)
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.getJSONObject("geometry")
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.getJSONArray("coordinates");
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final float lon = rawCoords.getFloat(0);
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final float lat = rawCoords.getFloat(1);
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return new Coords(lat, lon);
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}
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City (String cityName) {
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this.cityName = cityName;
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}
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public String getCityName() {
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return cityName;
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}
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/**
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* Returns the city coords using adresse.data.gouv.fr, cache the result
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* @return the city Coords
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* @throws IOException if the request to adresse.data.gouv.fr fails
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*
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*/
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public Coords getCityCoords() throws IOException {
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if (this.cityCoords == null) {
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this.cityCoords = getCoordsFromName(cityName);
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}
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return cityCoords;
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}
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@Override
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public String toString() {
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try {
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Coords coords = this.getCityCoords();
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return String.format(
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"City(%s, lat: %f, lon: %f)",
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this.cityName,
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coords.getLat(),
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coords.getLon()
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);
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}
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catch (IOException e) {
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return String.format(
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"City(%s, lat: Request failed, lon: Request Failed)",
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this.cityName
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);
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}
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}
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}
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