public Collection<IrodsCollection> listCollections() throws IrodsException {
		List<IrodsCollection> l = new ArrayList<IrodsCollection>();
		for (File f : irodsFile.listFiles()) {
			if (f instanceof IRODSFile && f.isDirectory()) {
				l.add(new JargonCollection(conn, (IRODSFile) f));
			}
		}
		return l;
	}