Version 12, December 2010

[GpsPrune.git] / tim / prune / function / GetWikipediaFunction.java

diff --git a/tim/prune/function/GetWikipediaFunction.java b/tim/prune/function/GetWikipediaFunction.java
new file mode 100644 (file)
index 0000000..acef09c
--- /dev/null
+++ b/tim/prune/function/GetWikipediaFunction.java
@@ -0,0 +1,133 @@
+package tim.prune.function;
+
+import java.io.InputStream;
+import java.net.URL;
+import java.util.ArrayList;
+
+import javax.xml.parsers.SAXParser;
+import javax.xml.parsers.SAXParserFactory;
+
+import tim.prune.App;
+import tim.prune.I18nManager;
+import tim.prune.data.DataPoint;
+import tim.prune.data.Field;
+import tim.prune.data.Latitude;
+import tim.prune.data.Longitude;
+import tim.prune.function.gpsies.GenericDownloaderFunction;
+import tim.prune.function.gpsies.GpsiesTrack;
+
+/**
+ * Function to load nearby point information from Wikipedia
+ * according to the currently viewed area
+ */
+public class GetWikipediaFunction extends GenericDownloaderFunction
+{
+       /** Maximum number of results to get */
+       private static final int MAX_RESULTS = 20;
+       /** Maximum distance from point in km */
+       private static final int MAX_DISTANCE = 15;
+
+
+       /**
+        * Constructor
+        * @param inApp App object
+        */
+       public GetWikipediaFunction(App inApp) {
+               super(inApp);
+       }
+
+       /**
+        * @return name key
+        */
+       public String getNameKey() {
+               return "function.getwikipedia";
+       }
+
+       /**
+        * @param inColNum index of column, 0 or 1
+        * @return key for this column
+        */
+       protected String getColumnKey(int inColNum)
+       {
+               if (inColNum == 0) return "dialog.wikipedia.column.name";
+               return "dialog.wikipedia.column.distance";
+       }
+
+
+       /**
+        * Run method to call geonames in separate thread
+        */
+       public void run()
+       {
+               _statusLabel.setText(I18nManager.getText("confirm.running"));
+               // Get coordinates from current point (if any) or from centre of screen
+               double lat = 0.0, lon = 0.0;
+               DataPoint point = _app.getTrackInfo().getCurrentPoint();
+               if (point == null)
+               {
+                       double[] coords = _app.getViewport().getBounds();
+                       lat = (coords[0] + coords[2]) / 2.0;
+                       lon = (coords[1] + coords[3]) / 2.0;
+               }
+               else {
+                       lat = point.getLatitude().getDouble();
+                       lon = point.getLongitude().getDouble();
+               }
+
+               String descMessage = "";
+               InputStream inStream = null;
+
+               // Example http://ws.geonames.org/findNearbyWikipedia?lat=47&lng=9
+               String urlString = "http://ws.geonames.org/findNearbyWikipedia?lat=" +
+                       lat + "&lng=" + lon + "&maxRows=" + MAX_RESULTS
+                       + "&radius=" + MAX_DISTANCE + "&lang=" + I18nManager.getText("wikipedia.lang");
+               // Parse the returned XML with a special handler
+               GetWikipediaXmlHandler xmlHandler = new GetWikipediaXmlHandler();
+               try
+               {
+                       URL url = new URL(urlString);
+                       SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
+                       inStream = url.openStream();
+                       saxParser.parse(inStream, xmlHandler);
+               }
+               catch (Exception e) {
+                       descMessage = e.getClass().getName() + " - " + e.getMessage();
+               }
+               // Close stream and ignore errors
+               try {
+                       inStream.close();
+               } catch (Exception e) {}
+               // Add track list to model
+               ArrayList<GpsiesTrack> trackList = xmlHandler.getTrackList();
+               _trackListModel.addTracks(trackList);
+
+               // Set status label according to error or "none found", leave blank if ok
+               if (descMessage.equals("") && (trackList == null || trackList.size() == 0)) {
+                       descMessage = I18nManager.getText("dialog.gpsies.nonefound");
+               }
+               _statusLabel.setText(descMessage);
+       }
+
+       /**
+        * Load the selected track or point
+        */
+       protected void loadSelected()
+       {
+               // Find the row selected in the table and get the corresponding track
+               int rowNum = _trackTable.getSelectedRow();
+               if (rowNum >= 0 && rowNum < _trackListModel.getRowCount())
+               {
+                       String coords = _trackListModel.getTrack(rowNum).getDownloadLink();
+                       String[] latlon = coords.split(",");
+                       if (latlon.length == 2)
+                       {
+                               DataPoint point = new DataPoint(new Latitude(latlon[0]), new Longitude(latlon[1]), null);
+                               point.setFieldValue(Field.WAYPT_NAME, _trackListModel.getTrack(rowNum).getTrackName(), false);
+                               _app.createPoint(point);
+                       }
+               }
+               // Close the dialog
+               _cancelled = true;
+               _dialog.dispose();
+       }
+}