src/tim/prune/function/srtm/SrtmDiskCache.java

   1 package tim.prune.function.srtm;
   2
   3 import java.io.File;
   4
   5 import tim.prune.config.Config;
   6 import tim.prune.I18nManager;
   7
   8 public class SrtmDiskCache {
   9
  10         private static boolean _cacheIsUsable = false;
  11         private static File _cacheDir = null;
  12
  13         public static boolean ensureCacheIsUsable()
  14         {
  15
  16                 if (_cacheIsUsable)
  17                 {
  18                         return true;
  19                 }
  20                 // Check the cache is ok
  21                 String diskCachePath = Config.getConfigString(Config.KEY_DISK_CACHE);
  22                 if (diskCachePath == null)
  23                 {
  24                         return false;
  25                 }
  26                 File srtmDir = new File(diskCachePath, "srtm");
  27                 if (!srtmDir.exists() && !srtmDir.mkdir()) {
  28                         // can't create the srtm directory
  29                         return false;
  30                 }
  31                 _cacheIsUsable = true;
  32                 _cacheDir = srtmDir;
  33                 return true;
  34         }
  35
  36         public static File getCacheDir(String inSourceName)
  37         {
  38                 if (_cacheDir == null)
  39                 {
  40                         ensureCacheIsUsable();
  41                 }
  42                 File cacheDir = new File(_cacheDir, inSourceName);
  43                 if (!cacheDir.exists() && !cacheDir.mkdir()) {
  44                         // can't create the srtm directory
  45                         return null;
  46                 }
  47                 return cacheDir;
  48         }
  49 }