K8s: Add apimachinery and apiserver packages (#83190)

pkg/apimachinery/apis/common/v0alpha1/unstructured.go

@@ -0,0 +1,118 @@
+package v0alpha1
+
+import (
+	"encoding/json"
+
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	runtime "k8s.io/apimachinery/pkg/runtime"
+	openapi "k8s.io/kube-openapi/pkg/common"
+	spec "k8s.io/kube-openapi/pkg/validation/spec"
+)
+
+// Unstructured allows objects that do not have Golang structs registered to be manipulated
+// generically.
+type Unstructured struct {
+	// Object is a JSON compatible map with string, float, int, bool, []interface{},
+	// or map[string]interface{} children.
+	Object map[string]any
+}
+
+// Produce an API definition that represents map[string]any
+func (u Unstructured) OpenAPIDefinition() openapi.OpenAPIDefinition {
+	return openapi.OpenAPIDefinition{
+		Schema: spec.Schema{
+			SchemaProps: spec.SchemaProps{
+				Type:                 []string{"object"},
+				AdditionalProperties: &spec.SchemaOrBool{Allows: true},
+			},
+			VendorExtensible: spec.VendorExtensible{
+				Extensions: map[string]interface{}{
+					"x-kubernetes-preserve-unknown-fields": true,
+				},
+			},
+		},
+	}
+}
+
+func (u *Unstructured) UnstructuredContent() map[string]interface{} {
+	if u.Object == nil {
+		return make(map[string]interface{})
+	}
+	return u.Object
+}
+
+func (u *Unstructured) SetUnstructuredContent(content map[string]interface{}) {
+	u.Object = content
+}
+
+// MarshalJSON ensures that the unstructured object produces proper
+// JSON when passed to Go's standard JSON library.
+func (u *Unstructured) MarshalJSON() ([]byte, error) {
+	return json.Marshal(u.Object)
+}
+
+// UnmarshalJSON ensures that the unstructured object properly decodes
+// JSON when passed to Go's standard JSON library.
+func (u *Unstructured) UnmarshalJSON(b []byte) error {
+	return json.Unmarshal(b, &u.Object)
+}
+
+func (u *Unstructured) DeepCopy() *Unstructured {
+	if u == nil {
+		return nil
+	}
+	out := new(Unstructured)
+	*out = *u
+	out.Object = runtime.DeepCopyJSON(u.Object)
+	return out
+}
+
+func (u *Unstructured) DeepCopyInto(out *Unstructured) {
+	clone := u.DeepCopy()
+	*out = *clone
+}
+
+func (u *Unstructured) Set(field string, value interface{}) {
+	if u.Object == nil {
+		u.Object = make(map[string]interface{})
+	}
+	_ = unstructured.SetNestedField(u.Object, value, field)
+}
+
+func (u *Unstructured) Remove(fields ...string) {
+	if u.Object == nil {
+		u.Object = make(map[string]interface{})
+	}
+	unstructured.RemoveNestedField(u.Object, fields...)
+}
+
+func (u *Unstructured) SetNestedField(value interface{}, fields ...string) {
+	if u.Object == nil {
+		u.Object = make(map[string]interface{})
+	}
+	_ = unstructured.SetNestedField(u.Object, value, fields...)
+}
+
+func (u *Unstructured) GetNestedString(fields ...string) string {
+	val, found, err := unstructured.NestedString(u.Object, fields...)
+	if !found || err != nil {
+		return ""
+	}
+	return val
+}
+
+func (u *Unstructured) GetNestedStringSlice(fields ...string) []string {
+	val, found, err := unstructured.NestedStringSlice(u.Object, fields...)
+	if !found || err != nil {
+		return nil
+	}
+	return val
+}
+
+func (u *Unstructured) GetNestedInt64(fields ...string) int64 {
+	val, found, err := unstructured.NestedInt64(u.Object, fields...)
+	if !found || err != nil {
+		return 0
+	}
+	return val
+}