if (getCode() == null || StringUtils.isEmpty(getCode().trim())) { return null; } else if(!StringUtils.isNumeric(getCode())){ throw new DomainException("error.roomClassification.code.isn't.a.number"); }
	public Integer getChildCode() {	    final int index = getCode().lastIndexOf('.', getCode().length());	    if (index > 0) {		return Integer.valueOf(getCode().substring(index + 1, getCode().length()));	    } else {		return Integer.valueOf(getCode());	    }	}