1 package tim.prune.function;
3 import java.io.InputStream;
5 import java.util.ArrayList;
7 import javax.xml.parsers.SAXParser;
8 import javax.xml.parsers.SAXParserFactory;
11 import tim.prune.I18nManager;
12 import tim.prune.data.DataPoint;
13 import tim.prune.data.Field;
14 import tim.prune.data.Latitude;
15 import tim.prune.data.Longitude;
16 import tim.prune.function.gpsies.GenericDownloaderFunction;
17 import tim.prune.function.gpsies.GpsiesTrack;
20 * Function to load nearby point information from Wikipedia
21 * according to the currently viewed area
23 public class GetWikipediaFunction extends GenericDownloaderFunction
25 /** Maximum number of results to get */
26 private static final int MAX_RESULTS = 20;
27 /** Maximum distance from point in km */
28 private static final int MAX_DISTANCE = 15;
29 /** Username to use for geonames queries */
30 private static final String GEONAMES_USERNAME = "gpsprune";
35 * @param inApp App object
37 public GetWikipediaFunction(App inApp) {
44 public String getNameKey() {
45 return "function.getwikipedia";
49 * @param inColNum index of column, 0 or 1
50 * @return key for this column
52 protected String getColumnKey(int inColNum)
54 if (inColNum == 0) return "dialog.wikipedia.column.name";
55 return "dialog.wikipedia.column.distance";
60 * Run method to call geonames in separate thread
64 _statusLabel.setText(I18nManager.getText("confirm.running"));
65 // Get coordinates from current point (if any) or from centre of screen
66 double lat = 0.0, lon = 0.0;
67 DataPoint point = _app.getTrackInfo().getCurrentPoint();
70 double[] coords = _app.getViewport().getBounds();
71 lat = (coords[0] + coords[2]) / 2.0;
72 lon = (coords[1] + coords[3]) / 2.0;
76 lat = point.getLatitude().getDouble();
77 lon = point.getLongitude().getDouble();
80 // Firstly try the local language
81 String lang = I18nManager.getText("wikipedia.lang");
82 submitSearch(lat, lon, lang);
83 // If we didn't get anything, try a secondary language
84 if (_trackListModel.isEmpty() && _errorMessage == null && lang.equals("als")) {
85 submitSearch(lat, lon, "de");
87 // If still nothing then try english
88 if (_trackListModel.isEmpty() && _errorMessage == null && !lang.equals("en")) {
89 submitSearch(lat, lon, "en");
92 // Set status label according to error or "none found", leave blank if ok
93 if (_errorMessage == null && _trackListModel.isEmpty()) {
94 _errorMessage = I18nManager.getText("dialog.wikipedia.nonefound");
96 _statusLabel.setText(_errorMessage == null ? "" : _errorMessage);
100 * Submit the search for the given parameters
101 * @param inLat latitude
102 * @param inLon longitude
103 * @param inLang language code to use, such as en or de
105 private void submitSearch(double inLat, double inLon, String inLang)
107 // Example http://api.geonames.org/findNearbyWikipedia?lat=47&lng=9
108 String urlString = "http://api.geonames.org/findNearbyWikipedia?lat=" +
109 inLat + "&lng=" + inLon + "&maxRows=" + MAX_RESULTS
110 + "&radius=" + MAX_DISTANCE + "&lang=" + inLang
111 + "&username=" + GEONAMES_USERNAME;
112 // Parse the returned XML with a special handler
113 GetWikipediaXmlHandler xmlHandler = new GetWikipediaXmlHandler();
114 InputStream inStream = null;
118 URL url = new URL(urlString);
119 SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
120 inStream = url.openStream();
121 saxParser.parse(inStream, xmlHandler);
123 catch (Exception e) {
124 _errorMessage = e.getClass().getName() + " - " + e.getMessage();
126 // Close stream and ignore errors
129 } catch (Exception e) {}
130 // Add track list to model
131 ArrayList<GpsiesTrack> trackList = xmlHandler.getTrackList();
132 _trackListModel.addTracks(trackList);
134 // Show error message if any
135 if (_trackListModel.isEmpty())
137 String error = xmlHandler.getErrorMessage();
138 if (error != null && !error.equals(""))
140 _app.showErrorMessageNoLookup(getNameKey(), error);
141 _errorMessage = error;
147 * Load the selected point(s)
149 protected void loadSelected()
151 // Find the rows selected in the table and get the corresponding coords
152 int numSelected = _trackTable.getSelectedRowCount();
153 if (numSelected < 1) return;
154 int[] rowNums = _trackTable.getSelectedRows();
155 for (int i=0; i<numSelected; i++)
157 int rowNum = rowNums[i];
158 if (rowNum >= 0 && rowNum < _trackListModel.getRowCount())
160 String coords = _trackListModel.getTrack(rowNum).getDownloadLink();
161 String[] latlon = coords.split(",");
162 if (latlon.length == 2)
164 DataPoint point = new DataPoint(new Latitude(latlon[0]), new Longitude(latlon[1]), null);
165 point.setFieldValue(Field.WAYPT_NAME, _trackListModel.getTrack(rowNum).getTrackName(), false);
166 _app.createPoint(point);