public File getFile(IliasFile iliasFile) {
   final String location = localFileLocations.get(iliasFile.getSize());
   if (location == null) {
     return null;
   }
   return new File(location);
 }
 private String getContainingFolder(IliasFile iliasFile) {
   final int size = iliasFile.getSize();
   String path = localFileLocations.get(size);
   if (path == null) {
     return null;
   }
   path = path.substring(0, path.lastIndexOf(File.separator));
   return path;
 }
 public void addIliasFile(IliasFile iliasFile, String path) {
   localFileLocations.put(iliasFile.getSize(), path);
 }
 public boolean contains(IliasFile iliasFile) {
   return localFileLocations.containsKey(iliasFile.getSize());
 }