tim/prune/function/cache/TileSet.java

   1 package tim.prune.function.cache;
   2
   3 import java.io.File;
   4 import java.util.ArrayList;
   5
   6
   7 /**
   8  * Class to hold information about a single tile set
   9  * within the overall Tile Cache.
  10  */
  11 public class TileSet
  12 {
  13         /** Summary row info for whole tileset */
  14         private RowInfo _rowInfo = null;
  15         /** Path relative to mapcache root */
  16         private String _path = null;
  17         /** Comma-separated list of configs using this tileset */
  18         private String _usedBy = null;
  19         /** List of infos for each zoom level */
  20         private ArrayList<RowInfo> _zoomLevels = null;
  21
  22
  23         /**
  24          * Constructor
  25          * @param inDir directory of tileset
  26          * @param inPath String describing relative path from cache root
  27          * @param inUsedBy String describing which configs use this Tileset
  28          */
  29         public TileSet(File inDir, String inPath, String inUsedBy)
  30         {
  31                 _path = inPath;
  32                 _usedBy = inUsedBy;
  33                 _rowInfo = new RowInfo();
  34                 _zoomLevels = new ArrayList<RowInfo>();
  35                 // Go through zoom directories and construct row info objects
  36                 if (inDir != null && inDir.exists() && inDir.isDirectory() && inDir.canRead())
  37                 {
  38                         for (File subdir : inDir.listFiles())
  39                         {
  40                                 if (subdir != null && subdir.exists() && subdir.isDirectory()
  41                                         && subdir.canRead() && isNumeric(subdir.getName()))
  42                                 {
  43                                         RowInfo row = makeRowInfo(subdir);
  44                                         _zoomLevels.add(row);
  45                                         _rowInfo.addRow(row);
  46                                 }
  47                         }
  48                 }
  49         }
  50
  51         /**
  52          * Check if a directory name is numeric
  53          * @param inName name of directory
  54          * @return true if it only contains characters 0-9
  55          */
  56         public static boolean isNumeric(String inName)
  57         {
  58                 if (inName == null || inName.equals("")) return false;
  59                 for (int i=0; i<inName.length(); i++)
  60                 {
  61                         char a = inName.charAt(i);
  62                         if (a < '0' || a > '9') return false;
  63                 }
  64                 return true;
  65         }
  66
  67         /**
  68          * Make a RowInfo object from the given directory
  69          * @param inDir directory for a single zoom level
  70          * @return RowInfo object describing files and size
  71          */
  72         private static RowInfo makeRowInfo(File inDir)
  73         {
  74                 RowInfo row = new RowInfo();
  75                 row.setZoom(Integer.parseInt(inDir.getName()));
  76                 for (File subdir : inDir.listFiles())
  77                 {
  78                         if (subdir != null && subdir.exists() && subdir.isDirectory()
  79                                 && subdir.canRead() && isNumeric(subdir.getName()))
  80                         {
  81                                 // Found a directory of images (finally!)
  82                                 for (File f : subdir.listFiles())
  83                                 {
  84                                         if (f != null && f.exists() && f.isFile() && f.canRead())
  85                                         {
  86                                                 final String filename = f.getName();
  87                                                 int dotpos = filename.lastIndexOf('.');
  88                                                 if (dotpos > 0 && isNumeric(filename.substring(0, dotpos))) {
  89                                                         row.addTile(f.length());
  90                                                 }
  91                                         }
  92                                 }
  93                         }
  94                 }
  95                 return row;
  96         }
  97
  98         /**
  99          * @return row info object
 100          */
 101         public RowInfo getRowInfo() {
 102                 return _rowInfo;
 103         }
 104
 105         /** @return relative path to tileset */
 106         public String getPath() {
 107                 return _path;
 108         }
 109
 110         /** @return users of tileset */
 111         public String getUsedBy() {
 112                 return _usedBy;
 113         }
 114 }