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accessor.go
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accessor.go
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// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and Gardener contributors
//
// SPDX-License-Identifier: Apache-2.0
package extensions
import (
"fmt"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
)
// Accessor tries to create an extensionsv1alpha1.Object from the given runtime.Object.
//
// If the given object already implements object, it is returned as-is.
// If the object is unstructured, an unstructured accessor is returned that retrieves values
// on a best-effort basis.
// Otherwise, an error with the type of the object is returned.
func Accessor(obj runtime.Object) (extensionsv1alpha1.Object, error) {
switch v := obj.(type) {
case extensionsv1alpha1.Object:
return v, nil
case *unstructured.Unstructured:
return UnstructuredAccessor(v), nil
default:
return nil, fmt.Errorf("value of type %T does not implement Object", obj)
}
}
// UnstructuredAccessor is an Object that retrieves values on a best-effort basis.
// If values don't exist, it usually returns the zero value of them.
func UnstructuredAccessor(u *unstructured.Unstructured) extensionsv1alpha1.Object {
return unstructuredAccessor{u}
}
type unstructuredAccessor struct {
*unstructured.Unstructured
}
type unstructuredSpecAccessor struct {
*unstructured.Unstructured
}
type unstructuredStatusAccessor struct {
*unstructured.Unstructured
}
func nestedString(obj map[string]any, fields ...string) string {
v, ok, err := unstructured.NestedString(obj, fields...)
if err != nil || !ok {
return ""
}
return v
}
func nestedInt64(obj map[string]any, fields ...string) int64 {
v, ok, err := unstructured.NestedInt64(obj, fields...)
if err != nil || !ok {
return 0
}
return v
}
func nestedStringReference(obj map[string]any, fields ...string) *string {
v, ok, err := unstructured.NestedString(obj, fields...)
if err != nil || !ok {
return nil
}
return &v
}
func nestedRawExtension(obj map[string]any, fields ...string) *runtime.RawExtension {
val, ok, err := unstructured.NestedFieldNoCopy(obj, fields...)
if err != nil || !ok {
return nil
}
data, ok := val.(map[string]any)
if !ok {
return nil
}
rawExtension := &runtime.RawExtension{}
if err := runtime.DefaultUnstructuredConverter.FromUnstructured(data, rawExtension); err != nil {
return nil
}
return rawExtension
}
// GetExtensionSpec implements Object.
func (u unstructuredAccessor) GetExtensionSpec() extensionsv1alpha1.Spec {
return unstructuredSpecAccessor(u)
}
// GetExtensionType implements Spec.
func (u unstructuredSpecAccessor) GetExtensionType() string {
return nestedString(u.UnstructuredContent(), "spec", "type")
}
// GetExtensionPurpose implements Spec.
func (u unstructuredSpecAccessor) GetExtensionPurpose() *string {
return nestedStringReference(u.UnstructuredContent(), "spec", "purpose")
}
// GetProviderConfig implements Spec.
func (u unstructuredSpecAccessor) GetProviderConfig() *runtime.RawExtension {
return nestedRawExtension(u.UnstructuredContent(), "spec", "providerConfig")
}
// GetExtensionStatus implements Object.
func (u unstructuredAccessor) GetExtensionStatus() extensionsv1alpha1.Status {
return unstructuredStatusAccessor(u)
}
// GetProviderStatus implements Status.
func (u unstructuredStatusAccessor) GetProviderStatus() *runtime.RawExtension {
return nestedRawExtension(u.UnstructuredContent(), "status", "providerStatus")
}
// GetLastOperation implements Status.
func (u unstructuredStatusAccessor) GetLastOperation() *gardencorev1beta1.LastOperation {
val, ok, err := unstructured.NestedFieldNoCopy(u.UnstructuredContent(), "status", "lastOperation")
if err != nil || !ok {
return nil
}
lastOperation := &gardencorev1beta1.LastOperation{}
if err := runtime.DefaultUnstructuredConverter.FromUnstructured(val.(map[string]any), lastOperation); err != nil {
return nil
}
return lastOperation
}
// SetLastOperation implements Status.
func (u unstructuredStatusAccessor) SetLastOperation(lastOp *gardencorev1beta1.LastOperation) {
unstrc, err := runtime.DefaultUnstructuredConverter.ToUnstructured(lastOp)
if err != nil {
return
}
if err := unstructured.SetNestedField(u.UnstructuredContent(), unstrc, "status", "lastOperation"); err != nil {
return
}
}
// GetLastError implements Status.
func (u unstructuredStatusAccessor) GetLastError() *gardencorev1beta1.LastError {
val, ok, err := unstructured.NestedFieldNoCopy(u.UnstructuredContent(), "status", "lastError")
if err != nil || !ok {
return nil
}
lastError := &gardencorev1beta1.LastError{}
if err := runtime.DefaultUnstructuredConverter.FromUnstructured(val.(map[string]any), lastError); err != nil {
return nil
}
return lastError
}
// SetLastError implements Status.
func (u unstructuredStatusAccessor) SetLastError(lastErr *gardencorev1beta1.LastError) {
unstrc, err := runtime.DefaultUnstructuredConverter.ToUnstructured(lastErr)
if err != nil {
return
}
if err := unstructured.SetNestedField(u.UnstructuredContent(), unstrc, "status", "lastError"); err != nil {
return
}
}
// GetObservedGeneration implements Status.
func (u unstructuredStatusAccessor) GetObservedGeneration() int64 {
return nestedInt64(u.Object, "status", "observedGeneration")
}
// SetObservedGeneration implements Status.
func (u unstructuredStatusAccessor) SetObservedGeneration(generation int64) {
if err := unstructured.SetNestedField(u.UnstructuredContent(), generation, "status", "observedGeneration"); err != nil {
return
}
}
// GetState implements Status.
func (u unstructuredStatusAccessor) GetState() *runtime.RawExtension {
val, ok, err := unstructured.NestedFieldNoCopy(u.UnstructuredContent(), "status", "state")
if err != nil || !ok {
return nil
}
raw := &runtime.RawExtension{}
err = runtime.DefaultUnstructuredConverter.FromUnstructured(val.(map[string]any), raw)
if err != nil {
return nil
}
return raw
}
// SetState implements Status.
func (u unstructuredStatusAccessor) SetState(state *runtime.RawExtension) {
unstrc, err := runtime.DefaultUnstructuredConverter.ToUnstructured(state)
if err != nil {
return
}
if err := unstructured.SetNestedField(u.UnstructuredContent(), unstrc, "status", "state"); err != nil {
return
}
}
// GetConditions implements Status.
func (u unstructuredStatusAccessor) GetConditions() []gardencorev1beta1.Condition {
val, ok, err := unstructured.NestedFieldNoCopy(u.UnstructuredContent(), "status", "conditions")
if err != nil || !ok {
return nil
}
var conditions []gardencorev1beta1.Condition
interfaceConditionSlice := val.([]any)
for _, interfaceCondition := range interfaceConditionSlice {
unstructuredCondition := interfaceCondition.(map[string]any)
condition := &gardencorev1beta1.Condition{}
if err := runtime.DefaultUnstructuredConverter.FromUnstructured(unstructuredCondition, condition); err != nil {
return nil
}
conditions = append(conditions, *condition)
}
return conditions
}
// SetConditions implements Status.
func (u unstructuredStatusAccessor) SetConditions(conditions []gardencorev1beta1.Condition) {
var interfaceSlice = make([]any, len(conditions))
for i, d := range conditions {
unstrc, err := runtime.DefaultUnstructuredConverter.ToUnstructured(&d)
if err != nil {
return
}
interfaceSlice[i] = unstrc
}
err := unstructured.SetNestedSlice(u.UnstructuredContent(), interfaceSlice, "status", "conditions")
if err != nil {
return
}
}
// GetResources implements Status.
func (u unstructuredStatusAccessor) GetResources() []gardencorev1beta1.NamedResourceReference {
val, ok, err := unstructured.NestedFieldNoCopy(u.UnstructuredContent(), "status", "resources")
if err != nil || !ok {
return nil
}
var resources []gardencorev1beta1.NamedResourceReference
interfaceResourceSlice := val.([]any)
for _, interfaceResource := range interfaceResourceSlice {
unstructuredResource := interfaceResource.(map[string]any)
resource := &gardencorev1beta1.NamedResourceReference{}
if err := runtime.DefaultUnstructuredConverter.FromUnstructured(unstructuredResource, resource); err != nil {
return nil
}
resources = append(resources, *resource)
}
return resources
}
// SetResources implements Status.
func (u unstructuredStatusAccessor) SetResources(namedResourceReference []gardencorev1beta1.NamedResourceReference) {
var interfaceSlice = make([]any, len(namedResourceReference))
for i, d := range namedResourceReference {
unstrc, err := runtime.DefaultUnstructuredConverter.ToUnstructured(&d)
if err != nil {
return
}
interfaceSlice[i] = unstrc
}
err := unstructured.SetNestedSlice(u.UnstructuredContent(), interfaceSlice, "status", "resources")
if err != nil {
return
}
}