public void addClasa(Clasa cl, Node node) {
		NodeList childNodes = node.getChildNodes();
		for (int i = 0; i < childNodes.getLength(); i++) {
			Node cNode = childNodes.item(i);
			if (cNode instanceof Element) {
				String content = cNode.getLastChild().getTextContent().trim();
				switch (cNode.getNodeName()) {
				case "idClasa":
					cl.setIdClasa(content);
					break;
				case "listaMaterii":
					addListaMaterii(cl, cNode);
					break;
				case "listaElevi":
					addListaElevi(cl, cNode);
					break;
				case "catalog":
					formCatalog(cl, cNode);
					break;
				default:
					break;
				}
			}
		}
	}