Password   string          `json:"password"`
}

// Validate ElasticsearchArgs fields
func (a ElasticsearchArgs) Validate() error {
	if !a.Enable {
		return nil
	}
	if a.URL.IsEmpty() {
		return errors.New("empty URL")
	}
	if a.Format != "" {
		f := strings.ToLower(a.Format)
		if f != event.NamespaceFormat && f != event.AccessFormat {
			return errors.New("format value unrecognized")
		}

	S3 S3Location `xml:"S3,omitempty"`
}

// IsEmpty returns true if output location not specified.
func (o *OutputLocation) IsEmpty() bool {
	return o.S3.BucketName == ""
}

// SelectParameters specifies sql select parameters
type SelectParameters struct {
	s3select.S3Select
}

// IsEmpty returns true if no select parameters set
func (sp *SelectParameters) IsEmpty() bool {
	return sp == nil
}

func NewPostgreSQLTarget(id string, args PostgreSQLArgs, loggerOnce logger.LogOnce) (*PostgreSQLTarget, error) {
	params := []string{args.ConnectionString}
	if args.ConnectionString == "" {
		params = []string{}
		if !args.Host.IsEmpty() {
			params = append(params, "host="+args.Host.String())
		}
		if args.Port != "" {
			params = append(params, "port="+args.Port)
		}
		if args.Username != "" {

		globalEtcdClient, err = etcd.New(etcdCfg)
		if err != nil {
			configLogIf(ctx, fmt.Errorf("Unable to initialize etcd config: %w", err))
		}

		if len(globalDomainNames) != 0 && !globalDomainIPs.IsEmpty() && globalEtcdClient != nil {
			if globalDNSConfig != nil {
				// if global DNS is already configured, indicate with a warning, in case
				// users are confused.

		parsedInput.CompressionType = noneType
	}

	found := 0
	if !parsedInput.CSVArgs.IsEmpty() {
		parsedInput.format = csvFormat
		found++
	}
	if !parsedInput.JSONArgs.IsEmpty() {
		parsedInput.format = jsonFormat
		found++
	}
	if !parsedInput.ParquetArgs.IsEmpty() {
		if parsedInput.CompressionType != "" && parsedInput.CompressionType != noneType {

	} `json:"streaming"`

	RootCAs *x509.CertPool `json:"-"`
}

// Validate NATSArgs fields
func (n NATSArgs) Validate() error {
	if !n.Enable {
		return nil
	}

	if n.Address.IsEmpty() {
		return errors.New("empty address")
	}

	if n.Subject == "" {
		return errors.New("empty subject")
	}

	if n.ClientCert != "" && n.ClientKey == "" || n.ClientCert == "" && n.ClientKey != "" {

				l.Status = st
			default:
				return xml.UnmarshalError(fmt.Sprintf("expected element type <Status> but have <%s>", se.Name.Local))
			}
		}
	}
	return nil
}

// IsEmpty returns true if struct is empty
func (l *ObjectLegalHold) IsEmpty() bool {
	return !l.Status.Valid()
}

// ParseObjectLegalHold decodes the XML into ObjectLegalHold
func ParseObjectLegalHold(reader io.Reader) (hold *ObjectLegalHold, err error) {

		} else {
			policy, perr := policy.ParseConfig(bytes.NewReader(item.Policy))
			if perr != nil {
				writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, perr), r.URL)
				return
			}
			if policy.IsEmpty() {
				err = globalSiteReplicationSys.PeerAddPolicyHandler(ctx, item.Name, nil, item.UpdatedAt)
			} else {
				err = globalSiteReplicationSys.PeerAddPolicyHandler(ctx, item.Name, policy, item.UpdatedAt)
			}
		}

			} else {
				writeErrorResponse(r.Context(), w, toAPIError(r.Context(), err), r.URL)
			}
			return
		}
		if globalDomainIPs.Intersection(set.CreateStringSet(getHostsSlice(sr)...)).IsEmpty() {
			r.URL.Scheme = "http"
			if globalIsTLS {
				r.URL.Scheme = "https"
			}
			r.URL.Host = getHostFromSrv(sr)
			// Make sure we remove any existing headers before

	if !found {
		// Check for sub-prefix only if the input value is only a
		// single value, this rejects invalid inputs if any.
		found = !SubSystems.FuncMatch(strings.HasPrefix, subSystemValue[0]).IsEmpty() && len(subSystemValue) == 1
	}
	if !found {
		return nil, Errorf("unknown sub-system %s", s)
	}

	targets := Targets{}
	subSysPrefix := subSystemValue[0]
	if len(subSystemValue) == 2 {