"istio.io/api/operator/v1alpha1"
	operator_v1alpha1 "istio.io/istio/operator/pkg/apis/istio/v1alpha1"
	"istio.io/istio/operator/pkg/util"
	"istio.io/istio/operator/pkg/validate"
)

// UnmarshalAndValidateIOPS unmarshals a string containing IstioOperator YAML, validates it, and returns a struct
// representation if successful. In case of validation errors, it returns both the IstioOperatorSpec struct and

// isEmpty returns true if Tags field is null
func (a And) isEmpty() bool {
	return len(a.Tags) == 0 && !a.Prefix.set &&
		a.ObjectSizeGreaterThan == 0 && a.ObjectSizeLessThan == 0
}

// Validate - validates the And field
func (a And) Validate() error {
	// > This is used in a Lifecycle Rule Filter to apply a logical AND to two or more predicates.
	// ref: https://docs.aws.amazon.com/AmazonS3/latest/API/API_LifecycleRuleAndOperator.html

	var trw transitionWrapper
	err := d.DecodeElement(&trw, &startElement)
	if err != nil {
		return err
	}
	*t = Transition(trw)
	t.set = true
	return nil
}

// Validate - validates the "Transition" element
func (t Transition) Validate() error {
	if !t.set {
		return nil
	}

	if !t.IsDateNull() && t.Days > 0 {
		return errTransitionInvalid
	}

	if t.StorageClass == "" {

	// Requires versioning to be enabled
	ExcludedPrefixes []ExcludedPrefix `xml:",omitempty"`
	ExcludeFolders   bool             `xml:",omitempty"`
}

// Validate - validates the versioning configuration
func (v Versioning) Validate() error {
	// Not supported yet
	// switch v.MFADelete {
	// case Enabled, Disabled:
	// default:
	// 	return Errorf("unsupported MFADelete state %s", v.MFADelete)
	// }

// the explored nodes of the object tree.
func (r *ratchetingValueValidator) Validate(new interface{}) *validate.Result {
	opts := append([]validate.Option{
		r.getValidateOption(),
	}, r.options...)

	s := validate.NewSchemaValidator(r.schema, r.root, r.path, r.knownFormats, opts...)

	res := s.Validate(r.correlation.Value)

	if res.IsValid() {
		return res
	}

    }

    @Override
    public void found(ModelSchema<T> result) {
        this.result = result;
    }

    public void validate(ModelSchema<T> schema) {
        if (validator != null) {
            validator.execute(schema);
        }
    }

kind: ValidatingWebhookConfiguration
metadata:
  name: istio-validator-external-istiod
webhooks:
- admissionReviewVersions:
  - v1beta1
  - v1
  clientConfig:
    url: 
  name: rev.validation.istio.io

---
apiVersion: admissionregistration.k8s.io/v1
kind: ValidatingWebhookConfiguration
metadata:
  name: istiod-default-validator
webhooks:
- admissionReviewVersions:
  - v1beta1
  - v1
  clientConfig:

	}

	// ExecObjectLayerAPIAnonTest - Calls the HTTP API handler using the anonymous request, validates the ErrAccessDeniedResponse,
	// sets the bucket policy using the policy statement generated from `getReadOnlyBucketStatement` so that the
	// unsigned request goes through and its validated again.

	if !apiequality.Semantic.DeepEqual(oldIngress.Spec, newIngress.Spec) {
		newIngress.Generation = oldIngress.Generation + 1
	}

}

// Validate validates ingresses on create.
func (ingressStrategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorList {
	ingress := obj.(*networking.Ingress)
	return validation.ValidateIngressCreate(ingress)
}

// PrepareForUpdate clears fields that are not allowed to be set by end users on update.
func (priorityClassStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {}

// Validate validates a new PriorityClass.
func (priorityClassStrategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorList {
	pc := obj.(*scheduling.PriorityClass)
	return validation.ValidatePriorityClass(pc)
}