@Override
 public boolean setPermission(File f, int access, boolean enable, boolean owneronly) {
   boolean success = false;
   switch (access) {
     case ACCESS_READ:
       success = VMFile.setReadable(f.getPath(), enable, owneronly);
       break;
     case ACCESS_WRITE:
       success = VMFile.setWritable(f.getPath(), enable, owneronly);
       break;
     case ACCESS_EXECUTE:
       success = VMFile.setExecutable(f.getPath(), enable, owneronly);
       break;
   }
   return success;
 }