tim/prune/function/browser/UrlGenerator.java

   1 package tim.prune.function.browser;
   2
   3 import java.text.DecimalFormat;
   4 import java.text.NumberFormat;
   5 import java.util.Locale;
   6
   7 import tim.prune.I18nManager;
   8 import tim.prune.data.DataPoint;
   9 import tim.prune.data.DoubleRange;
  10 import tim.prune.data.TrackInfo;
  11
  12 /**
  13  * Class to manage the generation of map urls
  14  * for display in an external browser
  15  */
  16 public abstract class UrlGenerator
  17 {
  18         /** Number formatter for five dp */
  19         private static final NumberFormat FIVE_DP = NumberFormat.getNumberInstance(Locale.UK);
  20         // Select the UK locale for this formatter so that decimal point is always used (not comma)
  21         static {
  22                 if (FIVE_DP instanceof DecimalFormat) ((DecimalFormat) FIVE_DP).applyPattern("0.00000");
  23         }
  24
  25         /** Constant for Google Maps */
  26         public static final int MAP_SOURCE_GOOGLE = 0;
  27         /** Constant for Open Street Maps */
  28         public static final int MAP_SOURCE_OSM    = 1;
  29         /** Constant for Mapquest */
  30         public static final int MAP_SOURCE_MAPQUEST = 2;
  31         /** Constant for Yahoo */
  32         public static final int MAP_SOURCE_YAHOO  = 3;
  33
  34         // TODO: Add other map sources, eg MSN, search.ch ?
  35
  36         /**
  37          * Generate a URL for the given source and track info
  38          * @param inSource source to use, either google or openstreetmap
  39          * @param inTrackInfo track info
  40          * @return url for map
  41          */
  42         public static String generateUrl(int inSource, TrackInfo inTrackInfo)
  43         {
  44                 if (inSource == MAP_SOURCE_GOOGLE) {
  45                         return generateGoogleUrl(inTrackInfo);
  46                 }
  47                 else if (inSource == MAP_SOURCE_MAPQUEST) {
  48                         return generateMapquestUrl(inTrackInfo);
  49                 }
  50                 else if (inSource == MAP_SOURCE_YAHOO) {
  51                         return generateYahooUrl(inTrackInfo);
  52                 }
  53                 return generateOpenStreetMapUrl(inTrackInfo);
  54         }
  55
  56         /**
  57          * Generate a url for Google maps
  58          * @param inTrackInfo track information
  59          * @return URL
  60          */
  61         private static String generateGoogleUrl(TrackInfo inTrackInfo)
  62         {
  63                 // Check if any data to display
  64                 if (inTrackInfo == null || inTrackInfo.getTrack() == null || inTrackInfo.getTrack().getNumPoints() < 1)
  65                 {
  66                         return null;
  67                 }
  68                 double medianLat = getMedianValue(inTrackInfo.getTrack().getLatRange());
  69                 double medianLon = getMedianValue(inTrackInfo.getTrack().getLonRange());
  70                 double latSpan = getSpan(inTrackInfo.getTrack().getLatRange());
  71                 double lonSpan = getSpan(inTrackInfo.getTrack().getLonRange());
  72                 // Build basic url with centre position and span
  73                 String url = "http://" + I18nManager.getText("url.googlemaps")
  74                         + "/?ll=" + FIVE_DP.format(medianLat) + "," + FIVE_DP.format(medianLon)
  75                         + "&spn=" + FIVE_DP.format(latSpan) + "," + FIVE_DP.format(lonSpan);
  76                 DataPoint currPoint = inTrackInfo.getCurrentPoint();
  77                 // Add selected point, if any
  78                 if (currPoint != null) {
  79                         url = url + "&q=" + FIVE_DP.format(currPoint.getLatitude().getDouble()) + ","
  80                                 + FIVE_DP.format(currPoint.getLongitude().getDouble());
  81                         if (currPoint.getWaypointName() != null) {
  82                                 url = url + "(" + currPoint.getWaypointName() + ")";
  83                         }
  84                 }
  85                 //System.out.println(url);
  86                 return url;
  87         }
  88
  89         /**
  90          * Generate a url for Open Street Map
  91          * @param inTrackInfo track information
  92          * @return URL
  93          */
  94         private static String generateOpenStreetMapUrl(TrackInfo inTrackInfo)
  95         {
  96                 // Check if any data to display
  97                 if (inTrackInfo == null || inTrackInfo.getTrack() == null || inTrackInfo.getTrack().getNumPoints() < 1)
  98                 {
  99                         return null;
 100                 }
 101                 DoubleRange latRange = inTrackInfo.getTrack().getLatRange();
 102                 DoubleRange lonRange = inTrackInfo.getTrack().getLonRange();
 103                 // Build basic url using min and max lat and long
 104                 String url = "http://openstreetmap.org/?minlat=" + FIVE_DP.format(latRange.getMinimum())
 105                         + "&maxlat=" + FIVE_DP.format(latRange.getMaximum())
 106                         + "&minlon=" + FIVE_DP.format(lonRange.getMinimum()) + "&maxlon=" + FIVE_DP.format(lonRange.getMaximum());
 107                 DataPoint currPoint = inTrackInfo.getCurrentPoint();
 108                 // Add selected point, if any (no way to add point name?)
 109                 if (currPoint != null) {
 110                         url = url + "&mlat=" + FIVE_DP.format(currPoint.getLatitude().getDouble())
 111                                 + "&mlon=" + FIVE_DP.format(currPoint.getLongitude().getDouble());
 112                 }
 113                 return url;
 114         }
 115
 116         /**
 117          * Generate a url for Mapquest maps
 118          * @param inTrackInfo track information
 119          * @return URL
 120          */
 121         private static String generateMapquestUrl(TrackInfo inTrackInfo)
 122         {
 123                 // Check if any data to display
 124                 if (inTrackInfo == null || inTrackInfo.getTrack() == null || inTrackInfo.getTrack().getNumPoints() < 1)
 125                 {
 126                         return null;
 127                 }
 128                 double medianLat = getMedianValue(inTrackInfo.getTrack().getLatRange());
 129                 double medianLon = getMedianValue(inTrackInfo.getTrack().getLonRange());
 130                 // Build basic url with centre position
 131                 String url = "http://atlas.mapquest.com/maps/map.adp?latlongtype=decimal&latitude="
 132                         + FIVE_DP.format(medianLat) + "&longitude=" + FIVE_DP.format(medianLon);
 133                 return url;
 134         }
 135
 136
 137         /**
 138          * Generate a url for Yahoo maps
 139          * @param inTrackInfo track information
 140          * @return URL
 141          */
 142         private static String generateYahooUrl(TrackInfo inTrackInfo)
 143         {
 144                 // Check if any data to display
 145                 if (inTrackInfo == null || inTrackInfo.getTrack() == null || inTrackInfo.getTrack().getNumPoints() < 1)
 146                 {
 147                         return null;
 148                 }
 149                 double medianLat = getMedianValue(inTrackInfo.getTrack().getLatRange());
 150                 double medianLon = getMedianValue(inTrackInfo.getTrack().getLonRange());
 151                 // Build basic url with centre position
 152                 String url = "http://maps.yahoo.com/#lat=" + FIVE_DP.format(medianLat)
 153                         + "&lon=" + FIVE_DP.format(medianLon) + "&zoom=13";
 154                 return url;
 155         }
 156
 157 /**
 158          * Get the median value from the given lat/long range
 159          * @param inRange range of values
 160          * @return median value
 161          */
 162         private static double getMedianValue(DoubleRange inRange)
 163         {
 164                 return (inRange.getMaximum() + inRange.getMinimum()) / 2.0;
 165         }
 166
 167         /**
 168          * Get the span of the given lat/long range
 169          * @param inRange range of values
 170          * @return span
 171          */
 172         private static double getSpan(DoubleRange inRange)
 173         {
 174                 return inRange.getMaximum() - inRange.getMinimum();
 175         }
 176 }