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object-reference.go
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object-reference.go
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package support
import (
"fmt"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
pr "k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/client-go/kubernetes/scheme"
"reflect"
"strings"
)
type ObjectReference interface {
ApiVersion() string
Kind() string
Namespace() string
Name() string
String() string
ShortString() string
Equals(ObjectReference) bool
WithNamespace(string) ObjectReference
WithName(string) ObjectReference
WithGroupVersionKind(schema.GroupVersionKind) ObjectReference
WithApiVersionAndKind(apiVersion, king string) ObjectReference
GroupVersionKind() schema.GroupVersionKind
}
type ObjectReferenceSource interface {
v1.Object
pr.Object
}
func NewObjectReferenceOf(src ObjectReferenceSource) (ObjectReference, error) {
gvk := src.GetObjectKind().GroupVersionKind()
if gvk.Group == "" && gvk.Version == "" {
candidates, _, err := scheme.Scheme.ObjectKinds(src)
if err != nil {
return nil, fmt.Errorf("cannot determine ObjectVersionKind for %v: %w", reflect.TypeOf(src), err)
}
if len(candidates) <= 0 {
return nil, fmt.Errorf("cannot determine ObjectVersionKind for %v", reflect.TypeOf(src))
}
gvk = candidates[0]
}
apiVersion, kind := gvkToApiVersionAndKind(&gvk)
return objectReference{
apiVersion: apiVersion,
kind: kind,
namespace: src.GetNamespace(),
name: src.GetName(),
}, nil
}
func gvkToApiVersionAndKind(gvk *schema.GroupVersionKind) (apiVersion, kind string) {
apiVersion = strings.Clone(gvk.Group)
if v := gvk.Version; v != "" {
if apiVersion != "" {
apiVersion += "/"
}
apiVersion += v
}
kind = strings.Clone(gvk.Kind)
return
}
type objectReference struct {
apiVersion string
kind string
namespace string
name string
}
func (this objectReference) Namespace() string {
return this.namespace
}
func (this objectReference) Name() string {
return this.name
}
func (this objectReference) ApiVersion() string {
return this.apiVersion
}
func (this objectReference) Kind() string {
return this.kind
}
func (this objectReference) WithGroupVersionKind(gvk schema.GroupVersionKind) ObjectReference {
apiVersion, kind := gvkToApiVersionAndKind(&gvk)
return objectReference{
apiVersion: apiVersion,
kind: kind,
namespace: strings.Clone(this.namespace),
name: strings.Clone(this.name),
}
}
func (this objectReference) WithApiVersionAndKind(apiVersion, kind string) ObjectReference {
return objectReference{
apiVersion: strings.Clone(apiVersion),
kind: strings.Clone(kind),
namespace: strings.Clone(this.namespace),
name: strings.Clone(this.name),
}
}
func (this objectReference) WithNamespace(v string) ObjectReference {
return objectReference{
apiVersion: strings.Clone(this.apiVersion),
kind: strings.Clone(this.kind),
namespace: strings.Clone(v),
name: strings.Clone(this.name),
}
}
func (this objectReference) WithName(v string) ObjectReference {
return objectReference{
apiVersion: strings.Clone(this.apiVersion),
kind: strings.Clone(this.kind),
namespace: strings.Clone(this.namespace),
name: strings.Clone(v),
}
}
func (this objectReference) GroupVersionKind() schema.GroupVersionKind {
return schema.FromAPIVersionAndKind(this.apiVersion, this.kind)
}
func (this objectReference) String() string {
return this.Kind() + ":" + this.ShortString()
}
func (this objectReference) ShortString() string {
if v := this.namespace; v != "" {
return v + "/" + this.name
}
return strings.Clone(this.name)
}
func (this objectReference) AsShortStringer() fmt.Stringer {
return objectReferenceShortStringer(this)
}
type objectReferenceShortStringer objectReference
func (this objectReferenceShortStringer) String() string {
return objectReference(this).ShortString()
}
func (this objectReference) Equals(o ObjectReference) bool {
if o == nil {
return false
}
return o.ApiVersion() == this.ApiVersion() &&
o.Kind() == this.Kind() &&
o.Namespace() == this.Namespace() &&
o.Name() == this.Name()
}