InputStream s = u.getInputStream();
String id = ManageSnapshotsPanel.this.getModelObject().getId();
Brix brix = getBrix();
JcrSession session = brix.getCurrentSession(id);
if (session.itemExists(brix.getRootPath())) {
session.getItem(brix.getRootPath()).remove();
}
session.importXML("/", s,
ImportUUIDBehavior.IMPORT_UUID_COLLISION_REPLACE_EXISTING);
session.save();