tim/prune/function/gpsies/GetGpsiesFunction.java

   1 package tim.prune.function.gpsies;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.net.URL;
   6 import java.util.ArrayList;
   7
   8 import javax.xml.parsers.SAXParser;
   9 import javax.xml.parsers.SAXParserFactory;
  10
  11 import tim.prune.App;
  12 import tim.prune.I18nManager;
  13 import tim.prune.load.xml.XmlFileLoader;
  14 import tim.prune.load.xml.ZipFileLoader;
  15
  16 /**
  17  * Function to load track information from Gpsies.com
  18  * according to the currently viewed area
  19  */
  20 public class GetGpsiesFunction extends GenericDownloaderFunction
  21 {
  22         /** Number of results per page */
  23         private static final int RESULTS_PER_PAGE = 20;
  24         /** Maximum number of results to get */
  25         private static final int MAX_RESULTS = 60;
  26
  27
  28         /**
  29          * Constructor
  30          * @param inApp App object
  31          */
  32         public GetGpsiesFunction(App inApp) {
  33                 super(inApp);
  34         }
  35
  36         /**
  37          * @return name key
  38          */
  39         public String getNameKey() {
  40                 return "function.getgpsies";
  41         }
  42
  43         /**
  44          * @param inColNum index of column, 0 or 1
  45          * @return key for this column
  46          */
  47         protected String getColumnKey(int inColNum)
  48         {
  49                 if (inColNum == 0) return "dialog.gpsies.column.name";
  50                 return "dialog.gpsies.column.length";
  51         }
  52
  53
  54         /**
  55          * Run method to call gpsies.com in separate thread
  56          */
  57         public void run()
  58         {
  59                 _statusLabel.setText(I18nManager.getText("confirm.running"));
  60                 // Act on callback to update list and send another request if necessary
  61                 double[] coords = _app.getViewport().getBounds();
  62                 // Example http://www.gpsies.com/api.do?BBOX=10,51,12,53&limit=20&trackTypes=jogging&filetype=kml&device=Run.GPS
  63                 int currPage = 1;
  64
  65                 ArrayList<GpsiesTrack> trackList = null;
  66                 URL url = null;
  67                 String descMessage = "";
  68                 InputStream inStream = null;
  69                 // Loop for each page of the results
  70                 do
  71                 {
  72                         String urlString = "http://www.gpsies.com/api.do?BBOX=" +
  73                                 coords[1] + "," + coords[0] + "," + coords[3] + "," + coords[2] +
  74                                 "&limit=" + RESULTS_PER_PAGE + "&resultPage=" + currPage;
  75                         // Parse the returned XML with a special handler
  76                         GpsiesXmlHandler xmlHandler = new GpsiesXmlHandler();
  77                         try
  78                         {
  79                                 url = new URL(urlString);
  80                                 SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
  81                                 inStream = url.openStream();
  82                                 saxParser.parse(inStream, xmlHandler);
  83                         }
  84                         catch (Exception e) {
  85                                 descMessage = e.getClass().getName() + " - " + e.getMessage();
  86                         }
  87                         // Close stream and ignore errors
  88                         try {
  89                                 inStream.close();
  90                         } catch (Exception e) {}
  91                         // Add track list to model
  92                         trackList = xmlHandler.getTrackList();
  93                         _trackListModel.addTracks(trackList);
  94
  95                         // Compare number of results with results per page and call again if necessary
  96                         currPage++;
  97                 }
  98                 while (trackList != null && trackList.size() == RESULTS_PER_PAGE
  99                         && _trackListModel.getRowCount() < MAX_RESULTS && !_cancelled);
 100                 // Set status label according to error or "none found", leave blank if ok
 101                 if (descMessage.equals("") && (trackList == null || trackList.size() == 0)) {
 102                         descMessage = I18nManager.getText("dialog.gpsies.nonefound");
 103                 }
 104                 _statusLabel.setText(descMessage);
 105         }
 106
 107         /**
 108          * Load the selected track or point
 109          */
 110         protected void loadSelected()
 111         {
 112                 // Find the row selected in the table and get the corresponding track
 113                 int rowNum = _trackTable.getSelectedRow();
 114                 if (rowNum >= 0 && rowNum < _trackListModel.getRowCount())
 115                 {
 116                         String url = _trackListModel.getTrack(rowNum).getDownloadLink();
 117                         XmlFileLoader xmlLoader = new XmlFileLoader(_app);
 118                         ZipFileLoader loader = new ZipFileLoader(_app, xmlLoader);
 119                         try
 120                         {
 121                                 loader.openStream(new URL(url).openStream());
 122                         }
 123                         catch (IOException ioe) {
 124                                 System.err.println("IO Exception : " + ioe.getMessage());
 125                         }
 126                 }
 127                 // Close the dialog
 128                 _cancelled = true;
 129                 _dialog.dispose();
 130         }
 131 }