tim/prune/function/SearchWikipediaNames.java

   1 package tim.prune.function;
   2
   3 import java.io.InputStream;
   4 import java.io.UnsupportedEncodingException;
   5 import java.net.URL;
   6 import java.net.URLEncoder;
   7 import java.util.ArrayList;
   8
   9 import javax.swing.JOptionPane;
  10 import javax.xml.parsers.SAXParser;
  11 import javax.xml.parsers.SAXParserFactory;
  12
  13 import tim.prune.App;
  14 import tim.prune.I18nManager;
  15 import tim.prune.data.DataPoint;
  16 import tim.prune.data.Field;
  17 import tim.prune.data.Latitude;
  18 import tim.prune.data.Longitude;
  19 import tim.prune.function.gpsies.GenericDownloaderFunction;
  20 import tim.prune.function.gpsies.GpsiesTrack;
  21
  22 /**
  23  * Function to search Wikipedia for place names
  24  */
  25 public class SearchWikipediaNames extends GenericDownloaderFunction
  26 {
  27         /** search term */
  28         private String _searchTerm = null;
  29         /** Maximum number of results to get */
  30         private static final int MAX_RESULTS = 20;
  31         /** Username to use for geonames queries */
  32         private static final String GEONAMES_USERNAME = "gpsprune";
  33
  34         /**
  35          * Constructor
  36          * @param inApp App object
  37          */
  38         public SearchWikipediaNames(App inApp) {
  39                 super(inApp);
  40         }
  41
  42         /**
  43          * @return name key
  44          */
  45         public String getNameKey() {
  46                 return "function.searchwikipedianames";
  47         }
  48
  49         /**
  50          * @param inColNum index of column, 0 or 1
  51          * @return key for this column
  52          */
  53         protected String getColumnKey(int inColNum)
  54         {
  55                 if (inColNum == 0) return "dialog.wikipedia.column.name";
  56                 return null;
  57         }
  58
  59         /**
  60          * Before dialog is shown, need to get search term
  61          */
  62         public void begin()
  63         {
  64                 Object search = JOptionPane.showInputDialog(_app.getFrame(),
  65                         I18nManager.getText("dialog.searchwikipedianames.search"),
  66                         I18nManager.getText(getNameKey()),
  67                         JOptionPane.QUESTION_MESSAGE, null, null, "");
  68                 if (search != null)
  69                 {
  70                         _searchTerm = search.toString();
  71                         if (!_searchTerm.equals("")) {
  72                                 super.begin();
  73                         }
  74                 }
  75         }
  76
  77         /**
  78          * Run method to call geonames in separate thread
  79          */
  80         public void run()
  81         {
  82                 _statusLabel.setText(I18nManager.getText("confirm.running"));
  83
  84                 String descMessage = "";
  85                 InputStream inStream = null;
  86
  87                 // language (only de and en available)
  88                 String lang = I18nManager.getText("wikipedia.lang");
  89                 if (lang.equals("de") || lang.equals("als")) {
  90                         lang = "de";
  91                 }
  92                 else {
  93                         lang = "en";
  94                 }
  95                 // Replace awkward characters with character equivalents
  96                 String searchTerm;
  97                 try {
  98                         searchTerm = URLEncoder.encode(_searchTerm, "UTF-8");
  99                 } catch (UnsupportedEncodingException e1) {
 100                         searchTerm = _searchTerm;
 101                 }
 102                 // Example http://ws.geonames.org/wikipediaSearch?q=london&maxRows=10
 103                 String urlString = "http://api.geonames.org/wikipediaSearch?title=" + searchTerm
 104                         + "&maxRows=" + MAX_RESULTS + "&lang=" + lang + "&username=" + GEONAMES_USERNAME;
 105                 // Parse the returned XML with a special handler
 106                 GetWikipediaXmlHandler xmlHandler = new GetWikipediaXmlHandler();
 107                 try
 108                 {
 109                         URL url = new URL(urlString);
 110                         SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
 111                         inStream = url.openStream();
 112                         saxParser.parse(inStream, xmlHandler);
 113                 }
 114                 catch (Exception e) {
 115                         descMessage = e.getClass().getName() + " - " + e.getMessage();
 116                 }
 117                 // Close stream and ignore errors
 118                 try {
 119                         inStream.close();
 120                 } catch (Exception e) {}
 121                 // Add track list to model
 122                 ArrayList<GpsiesTrack> trackList = xmlHandler.getTrackList();
 123                 // TODO: Do a better job of sorting replies by relevance - use three different lists
 124                 _trackListModel.addTracks(trackList);
 125
 126                 // Set status label according to error or "none found", leave blank if ok
 127                 if (descMessage.equals("") && (trackList == null || trackList.size() == 0)) {
 128                         descMessage = I18nManager.getText("dialog.gpsies.nonefound");
 129                 }
 130                 _statusLabel.setText(descMessage);
 131         }
 132
 133
 134         /**
 135          * Load the selected point(s)
 136          */
 137         protected void loadSelected()
 138         {
 139                 // Find the rows selected in the table and get the corresponding coords
 140                 int numSelected = _trackTable.getSelectedRowCount();
 141                 if (numSelected < 1) return;
 142                 int[] rowNums = _trackTable.getSelectedRows();
 143                 for (int i=0; i<numSelected; i++)
 144                 {
 145                         int rowNum = rowNums[i];
 146                         if (rowNum >= 0 && rowNum < _trackListModel.getRowCount())
 147                         {
 148                                 String coords = _trackListModel.getTrack(rowNum).getDownloadLink();
 149                                 String[] latlon = coords.split(",");
 150                                 if (latlon.length == 2)
 151                                 {
 152                                         DataPoint point = new DataPoint(new Latitude(latlon[0]), new Longitude(latlon[1]), null);
 153                                         point.setFieldValue(Field.WAYPT_NAME, _trackListModel.getTrack(rowNum).getTrackName(), false);
 154                                         _app.createPoint(point);
 155                                 }
 156                         }
 157                 }
 158                 // Close the dialog
 159                 _cancelled = true;
 160                 _dialog.dispose();
 161         }
 162 }