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.net.URLConnection;
   7 import java.util.ArrayList;
   8
   9 import javax.xml.parsers.SAXParser;
  10 import javax.xml.parsers.SAXParserFactory;
  11
  12 import tim.prune.App;
  13 import tim.prune.GpsPrune;
  14 import tim.prune.I18nManager;
  15 import tim.prune.load.xml.XmlFileLoader;
  16 import tim.prune.load.xml.ZipFileLoader;
  17
  18 /**
  19  * Function to load track information from Gpsies.com
  20  * according to the currently viewed area
  21  */
  22 public class GetGpsiesFunction extends GenericDownloaderFunction
  23 {
  24         /** Number of results per page */
  25         private static final int RESULTS_PER_PAGE = 20;
  26         /** Maximum number of results to get */
  27         private static final int MAX_RESULTS = 60;
  28         /** New API key (specific to this program) */
  29         private static final String GPSIES_API_KEY = "oumgvvbckiwpvsnb";
  30
  31
  32         /**
  33          * Constructor
  34          * @param inApp App object
  35          */
  36         public GetGpsiesFunction(App inApp) {
  37                 super(inApp);
  38         }
  39
  40         /**
  41          * @return name key
  42          */
  43         public String getNameKey() {
  44                 return "function.getgpsies";
  45         }
  46
  47         /**
  48          * @param inColNum index of column, 0 or 1
  49          * @return key for this column
  50          */
  51         protected String getColumnKey(int inColNum)
  52         {
  53                 if (inColNum == 0) return "dialog.gpsies.column.name";
  54                 return "dialog.gpsies.column.length";
  55         }
  56
  57
  58         /**
  59          * Run method to call gpsies.com in separate thread
  60          */
  61         public void run()
  62         {
  63                 _statusLabel.setText(I18nManager.getText("confirm.running"));
  64                 // Act on callback to update list and send another request if necessary
  65                 double[] coords = _app.getViewport().getBounds();
  66                 int currPage = 1;
  67
  68                 ArrayList<GpsiesTrack> trackList = null;
  69                 URL url = null;
  70                 String descMessage = "";
  71                 InputStream inStream = null;
  72                 // Loop for each page of the results
  73                 do
  74                 {
  75                         // Example http://ws.gpsies.com/api.do?BBOX=10,51,12,53&limit=20&resultPage=1&key=oumgvvbckiwpvsnb
  76                         String urlString = "http://ws.gpsies.com/api.do?BBOX=" +
  77                                 coords[1] + "," + coords[0] + "," + coords[3] + "," + coords[2] +
  78                                 "&limit=" + RESULTS_PER_PAGE + "&resultPage=" + currPage +
  79                                 "&key=" + GPSIES_API_KEY;
  80                         // Parse the returned XML with a special handler
  81                         GpsiesXmlHandler xmlHandler = new GpsiesXmlHandler();
  82                         try
  83                         {
  84                                 url = new URL(urlString);
  85                                 SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
  86                                 URLConnection conn = url.openConnection();
  87                                 conn.setRequestProperty("User-Agent", "GpsPrune v" + GpsPrune.VERSION_NUMBER);
  88                                 inStream = conn.getInputStream();
  89                                 saxParser.parse(inStream, xmlHandler);
  90                         }
  91                         catch (Exception e) {
  92                                 descMessage = e.getClass().getName() + " - " + e.getMessage();
  93                         }
  94                         // Close stream and ignore errors
  95                         try {
  96                                 inStream.close();
  97                         } catch (Exception e) {}
  98                         // Add track list to model
  99                         trackList = xmlHandler.getTrackList();
 100                         _trackListModel.addTracks(trackList);
 101
 102                         // Compare number of results with results per page and call again if necessary
 103                         currPage++;
 104                 }
 105                 while (trackList != null && trackList.size() == RESULTS_PER_PAGE
 106                         && _trackListModel.getRowCount() < MAX_RESULTS && !_cancelled);
 107                 // Set status label according to error or "none found", leave blank if ok
 108                 if (descMessage.equals("") && (trackList == null || trackList.size() == 0)) {
 109                         descMessage = I18nManager.getText("dialog.gpsies.nonefound");
 110                 }
 111                 _statusLabel.setText(descMessage);
 112         }
 113
 114         /**
 115          * Load the selected track(s)
 116          */
 117         protected void loadSelected()
 118         {
 119                 // Find the row(s) selected in the table and get the corresponding track
 120                 int numSelected = _trackTable.getSelectedRowCount();
 121                 if (numSelected < 1) return;
 122                 int[] rowNums = _trackTable.getSelectedRows();
 123                 for (int i=0; i<numSelected; i++)
 124                 {
 125                         int rowNum = rowNums[i];
 126                         if (rowNum >= 0 && rowNum < _trackListModel.getRowCount())
 127                         {
 128                                 String url = _trackListModel.getTrack(rowNum).getDownloadLink();
 129                                 XmlFileLoader xmlLoader = new XmlFileLoader(_app);
 130                                 ZipFileLoader loader = new ZipFileLoader(_app, xmlLoader);
 131                                 if (i>0) _app.autoAppendNextFile();
 132                                 try
 133                                 {
 134                                         loader.openStream(new URL(url).openStream());
 135                                 }
 136                                 catch (IOException ioe) {
 137                                         System.err.println("IO Exception : " + ioe.getMessage());
 138                                 }
 139                         }
 140                 }
 141                 // Close the dialog
 142                 _cancelled = true;
 143                 _dialog.dispose();
 144         }
 145 }