@Override
    public int hashCode() {
        int result = id != null ? id.hashCode() : 0;
        result = 31 * result + (URL != null ? URL.hashCode() : 0);
        result = 31 * result + (domainName != null ? domainName.hashCode() : 0);
        result = 31 * result + (pageTitle != null ? pageTitle.hashCode() : 0);
        result = 31 * result + (creationDate != null ? creationDate.hashCode() : 0);
        result = 31 * result + (archived != null ? archived.hashCode() : 0);
        result = 31 * result + (parentContainer != null ? parentContainer.hashCode() : 0);
        return result;
    }