src/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.function.search.GenericDownloaderFunction;
  16 import tim.prune.function.search.SearchResult;
  17 import tim.prune.load.xml.XmlFileLoader;
  18 import tim.prune.load.xml.ZipFileLoader;
  19
  20 /**
  21  * Function to load track information from Gpsies.com
  22  * according to the currently viewed area
  23  */
  24 public class GetGpsiesFunction extends GenericDownloaderFunction
  25 {
  26         /** Number of results per page */
  27         private static final int RESULTS_PER_PAGE = 20;
  28         /** Maximum number of results to get */
  29         private static final int MAX_RESULTS = 60;
  30         /** New API key (specific to this program) */
  31         private static final String GPSIES_API_KEY = "oumgvvbckiwpvsnb";
  32
  33
  34         /**
  35          * Constructor
  36          * @param inApp App object
  37          */
  38         public GetGpsiesFunction(App inApp) {
  39                 super(inApp);
  40         }
  41
  42         /**
  43          * @return name key
  44          */
  45         public String getNameKey() {
  46                 return "function.getgpsies";
  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.gpsies.column.name";
  56                 return "dialog.gpsies.column.length";
  57         }
  58
  59
  60         /**
  61          * Run method to call gpsies.com in separate thread
  62          */
  63         public void run()
  64         {
  65                 _statusLabel.setText(I18nManager.getText("confirm.running"));
  66                 // Act on callback to update list and send another request if necessary
  67                 double[] coords = _app.getViewport().getBounds();
  68                 int currPage = 1;
  69
  70                 ArrayList<SearchResult> trackList = null;
  71                 URL url = null;
  72                 String descMessage = "";
  73                 InputStream inStream = null;
  74                 // Loop for each page of the results
  75                 do
  76                 {
  77                         // Example http://ws.gpsies.com/api.do?BBOX=10,51,12,53&limit=20&resultPage=1&key=oumgvvbckiwpvsnb
  78                         String urlString = "http://ws.gpsies.com/api.do?BBOX=" +
  79                                 coords[1] + "," + coords[0] + "," + coords[3] + "," + coords[2] +
  80                                 "&limit=" + RESULTS_PER_PAGE + "&resultPage=" + currPage +
  81                                 "&key=" + GPSIES_API_KEY;
  82                         // Parse the returned XML with a special handler
  83                         GpsiesXmlHandler xmlHandler = new GpsiesXmlHandler();
  84                         try
  85                         {
  86                                 url = new URL(urlString);
  87                                 SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
  88                                 URLConnection conn = url.openConnection();
  89                                 conn.setRequestProperty("User-Agent", "GpsPrune v" + GpsPrune.VERSION_NUMBER);
  90                                 inStream = conn.getInputStream();
  91                                 saxParser.parse(inStream, xmlHandler);
  92                         }
  93                         catch (Exception e) {
  94                                 descMessage = e.getClass().getName() + " - " + e.getMessage();
  95                         }
  96                         // Close stream and ignore errors
  97                         try {
  98                                 inStream.close();
  99                         } catch (Exception e) {}
 100                         // Add track list to model
 101                         trackList = xmlHandler.getTrackList();
 102                         _trackListModel.addTracks(trackList);
 103
 104                         // Compare number of results with results per page and call again if necessary
 105                         currPage++;
 106                 }
 107                 while (trackList != null && trackList.size() == RESULTS_PER_PAGE
 108                         && _trackListModel.getRowCount() < MAX_RESULTS && !_cancelled);
 109                 // Set status label according to error or "none found", leave blank if ok
 110                 if (descMessage.equals("") && (trackList == null || trackList.size() == 0)) {
 111                         descMessage = I18nManager.getText("dialog.gpsies.nonefound");
 112                 }
 113                 _statusLabel.setText(descMessage);
 114         }
 115
 116         /**
 117          * Load the selected track(s)
 118          */
 119         protected void loadSelected()
 120         {
 121                 // Find the row(s) selected in the table and get the corresponding track
 122                 int numSelected = _trackTable.getSelectedRowCount();
 123                 if (numSelected < 1) return;
 124                 int[] rowNums = _trackTable.getSelectedRows();
 125                 for (int i=0; i<numSelected; i++)
 126                 {
 127                         int rowNum = rowNums[i];
 128                         if (rowNum >= 0 && rowNum < _trackListModel.getRowCount())
 129                         {
 130                                 String url = _trackListModel.getTrack(rowNum).getDownloadLink();
 131                                 XmlFileLoader xmlLoader = new XmlFileLoader(_app);
 132                                 ZipFileLoader loader = new ZipFileLoader(_app, xmlLoader);
 133                                 if (i>0) _app.autoAppendNextFile();
 134                                 try
 135                                 {
 136                                         loader.openStream(new URL(url).openStream());
 137                                 }
 138                                 catch (IOException ioe) {
 139                                         System.err.println("IO Exception : " + ioe.getMessage());
 140                                 }
 141                         }
 142                 }
 143                 // Close the dialog
 144                 _cancelled = true;
 145                 _dialog.dispose();
 146         }
 147 }