+++ /dev/null
-package tim.prune.function;
-
-import java.io.BufferedReader;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-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.Distance;
-import tim.prune.data.Field;
-import tim.prune.data.Latitude;
-import tim.prune.data.Longitude;
-import tim.prune.data.UnitSetLibrary;
-import tim.prune.function.search.GenericDownloaderFunction;
-import tim.prune.function.search.SearchResult;
-
-/**
- * Function to load nearby point information from Wikipedia (and Wikimedia)
- * 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;
- /** Username to use for geonames queries */
- private static final String GEONAMES_USERNAME = "gpsprune";
-
-
- /**
- * 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 get the nearby points in a 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();
- }
-
- // Before we ask geonames online, let's get wikimedia galleries first
- searchWikimediaGalleries(lat, lon);
-
- // For geonames, firstly try the local language
- String lang = I18nManager.getText("wikipedia.lang");
- submitSearch(lat, lon, lang);
- // If we didn't get anything, try a secondary language
- if (_trackListModel.isEmpty() && _errorMessage == null && lang.equals("als")) {
- submitSearch(lat, lon, "de");
- }
- // If still nothing then try english
- if (_trackListModel.isEmpty() && _errorMessage == null && !lang.equals("en")) {
- submitSearch(lat, lon, "en");
- }
-
- // Set status label according to error or "none found", leave blank if ok
- if (_errorMessage == null && _trackListModel.isEmpty()) {
- _errorMessage = I18nManager.getText("dialog.wikipedia.nonefound");
- }
- _statusLabel.setText(_errorMessage == null ? "" : _errorMessage);
- }
-
- /**
- * Submit the search for the given parameters
- * @param inLat latitude
- * @param inLon longitude
- * @param inLang language code to use, such as en or de
- */
- private void submitSearch(double inLat, double inLon, String inLang)
- {
- // Example http://api.geonames.org/findNearbyWikipedia?lat=47&lng=9
- String urlString = "http://api.geonames.org/findNearbyWikipedia?lat=" +
- inLat + "&lng=" + inLon + "&maxRows=" + MAX_RESULTS
- + "&radius=" + MAX_DISTANCE + "&lang=" + inLang
- + "&username=" + GEONAMES_USERNAME;
- // Parse the returned XML with a special handler
- GetWikipediaXmlHandler xmlHandler = new GetWikipediaXmlHandler();
- InputStream inStream = null;
-
- try
- {
- URL url = new URL(urlString);
- SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
- inStream = url.openStream();
- saxParser.parse(inStream, xmlHandler);
- }
- catch (Exception e) {
- _errorMessage = e.getClass().getName() + " - " + e.getMessage();
- }
- // Close stream and ignore errors
- try {
- inStream.close();
- } catch (Exception e) {}
- // Add track list to model
- ArrayList<SearchResult> trackList = xmlHandler.getTrackList();
- _trackListModel.addTracks(trackList, true);
-
- // Show error message if any
- if (_trackListModel.isEmpty())
- {
- String error = xmlHandler.getErrorMessage();
- if (error != null && !error.equals(""))
- {
- _app.showErrorMessageNoLookup(getNameKey(), error);
- _errorMessage = error;
- }
- }
- }
-
- /**
- * Load the selected point(s)
- */
- protected void loadSelected()
- {
- // Find the rows selected in the table and get the corresponding coords
- int numSelected = _trackTable.getSelectedRowCount();
- if (numSelected < 1) return;
- int[] rowNums = _trackTable.getSelectedRows();
- for (int i=0; i<numSelected; i++)
- {
- int rowNum = rowNums[i];
- if (rowNum >= 0 && rowNum < _trackListModel.getRowCount())
- {
- String lat = _trackListModel.getTrack(rowNum).getLatitude();
- String lon = _trackListModel.getTrack(rowNum).getLongitude();
- if (lat != null && lon != null)
- {
- DataPoint point = new DataPoint(new Latitude(lat), new Longitude(lon), null);
- point.setFieldValue(Field.WAYPT_NAME, _trackListModel.getTrack(rowNum).getTrackName(), false);
- _app.createPoint(point);
- }
- }
- }
- // Close the dialog
- _cancelled = true;
- _dialog.dispose();
- }
-
- /**
- * Search the local wikimedia index to see if there are any galleries nearby
- * @param inLat latitude
- * @param inLon longitude
- */
- private void searchWikimediaGalleries(double inLat, double inLon)
- {
- BufferedReader reader = null;
- try
- {
- InputStream in = GetWikipediaFunction.class.getResourceAsStream("/tim/prune/function/search/wikimedia_galleries.txt");
- reader = new BufferedReader(new InputStreamReader(in));
-
- ArrayList<SearchResult> trackList = new ArrayList<SearchResult>();
- DataPoint herePoint = new DataPoint(new Latitude(inLat, Latitude.FORMAT_DEG), new Longitude(inLon, Longitude.FORMAT_DEG), null);
- // Loop through the file line by line, looking for nearby points
- String line = null;
- while ((line = reader.readLine()) != null)
- {
- String[] lineComps = line.split("\t");
- if (lineComps.length == 4)
- {
- DataPoint p = new DataPoint(new Latitude(lineComps[2]), new Longitude(lineComps[3]), null);
- double distFromHere = Distance.convertRadiansToDistance(
- DataPoint.calculateRadiansBetween(p, herePoint), UnitSetLibrary.UNITS_KILOMETRES);
- if (distFromHere < MAX_DISTANCE)
- {
- SearchResult gallery = new SearchResult();
- gallery.setTrackName(I18nManager.getText("dialog.wikipedia.gallery") + ": " + lineComps[0]);
- gallery.setDescription(lineComps[1]);
- gallery.setLatitude(lineComps[2]);
- gallery.setLongitude(lineComps[3]);
- gallery.setWebUrl("https://commons.wikimedia.org/wiki/" + lineComps[0]);
- gallery.setLength(distFromHere * 1000.0); // convert from km to m
- trackList.add(gallery);
- }
- }
- }
- _trackListModel.addTracks(trackList, true);
- }
- catch (java.io.IOException e) {
- System.err.println("Exception trying to read wikimedia file : " + e.getMessage());
- }
- catch (NullPointerException e) {
- System.err.println("Couldn't find wikimedia file : " + e.getMessage());
- }
- finally
- {
- try {
- reader.close();
- }
- catch (Exception e) {} // ignore
- }
- }
-}
projects / GpsPrune.git / blobdiff