Path expandDir = _rootDir;
Path tempDir = _rootDir.getParent().lookup(".temp");
Path dependPath = _rootDir.lookup("META-INF/resin-rar.timestamp");
// XXX: change to a hash
if (dependPath.canRead()) {
ReadStream is = null;
ObjectInputStream ois = null;
try {
is = dependPath.openRead();
ois = new ObjectInputStream(is);