Version 13, August 2011

[GpsPrune.git] / tim / prune / function / cache / TileSet.java

diff --git a/tim/prune/function/cache/TileSet.java b/tim/prune/function/cache/TileSet.java
new file mode 100644 (file)
index 0000000..3e308ba
--- /dev/null
+++ b/tim/prune/function/cache/TileSet.java
@@ -0,0 +1,114 @@
+package tim.prune.function.cache;
+
+import java.io.File;
+import java.util.ArrayList;
+
+
+/**
+ * Class to hold information about a single tile set
+ * within the overall Tile Cache.
+ */
+public class TileSet
+{
+       /** Summary row info for whole tileset */
+       private RowInfo _rowInfo = null;
+       /** Path relative to mapcache root */
+       private String _path = null;
+       /** Comma-separated list of configs using this tileset */
+       private String _usedBy = null;
+       /** List of infos for each zoom level */
+       private ArrayList<RowInfo> _zoomLevels = null;
+
+
+       /**
+        * Constructor
+        * @param inDir directory of tileset
+        * @param inPath String describing relative path from cache root
+        * @param inUsedBy String describing which configs use this Tileset
+        */
+       public TileSet(File inDir, String inPath, String inUsedBy)
+       {
+               _path = inPath;
+               _usedBy = inUsedBy;
+               _rowInfo = new RowInfo();
+               _zoomLevels = new ArrayList<RowInfo>();
+               // Go through zoom directories and construct row info objects
+               if (inDir != null && inDir.exists() && inDir.isDirectory() && inDir.canRead())
+               {
+                       for (File subdir : inDir.listFiles())
+                       {
+                               if (subdir != null && subdir.exists() && subdir.isDirectory()
+                                       && subdir.canRead() && isNumeric(subdir.getName()))
+                               {
+                                       RowInfo row = makeRowInfo(subdir);
+                                       _zoomLevels.add(row);
+                                       _rowInfo.addRow(row);
+                               }
+                       }
+               }
+       }
+
+       /**
+        * Check if a directory name is numeric
+        * @param inName name of directory
+        * @return true if it only contains characters 0-9
+        */
+       public static boolean isNumeric(String inName)
+       {
+               if (inName == null || inName.equals("")) return false;
+               for (int i=0; i<inName.length(); i++)
+               {
+                       char a = inName.charAt(i);
+                       if (a < '0' || a > '9') return false;
+               }
+               return true;
+       }
+
+       /**
+        * Make a RowInfo object from the given directory
+        * @param inDir directory for a single zoom level
+        * @return RowInfo object describing files and size
+        */
+       private static RowInfo makeRowInfo(File inDir)
+       {
+               RowInfo row = new RowInfo();
+               row.setZoom(Integer.parseInt(inDir.getName()));
+               for (File subdir : inDir.listFiles())
+               {
+                       if (subdir != null && subdir.exists() && subdir.isDirectory()
+                               && subdir.canRead() && isNumeric(subdir.getName()))
+                       {
+                               // Found a directory of images (finally!)
+                               for (File f : subdir.listFiles())
+                               {
+                                       if (f != null && f.exists() && f.isFile() && f.canRead())
+                                       {
+                                               final String filename = f.getName();
+                                               int dotpos = filename.lastIndexOf('.');
+                                               if (dotpos > 0 && isNumeric(filename.substring(0, dotpos))) {
+                                                       row.addTile(f.length());
+                                               }
+                                       }
+                               }
+                       }
+               }
+               return row;
+       }
+
+       /**
+        * @return row info object
+        */
+       public RowInfo getRowInfo() {
+               return _rowInfo;
+       }
+
+       /** @return relative path to tileset */
+       public String getPath() {
+               return _path;
+       }
+
+       /** @return users of tileset */
+       public String getUsedBy() {
+               return _usedBy;
+       }
+}