public int hashCode() {
        int result;
        result = (street != null ? street.hashCode() : 0);
        result = 29 * result + (city != null ? city.hashCode() : 0);
        result = 29 * result + (country != null ? country.hashCode() : 0);
        result = 29 * result + (state != null ? state.hashCode() : 0);
        result = 29 * result + (zip != null ? zip.hashCode() : 0);
        return result;
    }