public String getFullAlias() {
		if (parent != null) {
			String parentAlias = parent.getFullAlias();
			String alias = getAlias();
			if (alias.length() == 0)
				return parentAlias;
			else if (parentAlias.length() == 0)
				return alias;
			else
				return parentAlias + "." + alias;
		}
		return "";
	}