580 lines
14 KiB
Go
580 lines
14 KiB
Go
/*
|
|
Copyright 2014 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package meta
|
|
|
|
import (
|
|
"fmt"
|
|
"reflect"
|
|
|
|
"github.com/golang/glog"
|
|
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/apimachinery/pkg/conversion"
|
|
"k8s.io/apimachinery/pkg/runtime"
|
|
"k8s.io/apimachinery/pkg/runtime/schema"
|
|
"k8s.io/apimachinery/pkg/types"
|
|
)
|
|
|
|
// errNotList is returned when an object implements the Object style interfaces but not the List style
|
|
// interfaces.
|
|
var errNotList = fmt.Errorf("object does not implement the List interfaces")
|
|
|
|
// ListAccessor returns a List interface for the provided object or an error if the object does
|
|
// not provide List.
|
|
// IMPORTANT: Objects are a superset of lists, so all Objects return List metadata. Do not use this
|
|
// check to determine whether an object *is* a List.
|
|
// TODO: return bool instead of error
|
|
func ListAccessor(obj interface{}) (List, error) {
|
|
switch t := obj.(type) {
|
|
case List:
|
|
return t, nil
|
|
case metav1.List:
|
|
return t, nil
|
|
case ListMetaAccessor:
|
|
if m := t.GetListMeta(); m != nil {
|
|
return m, nil
|
|
}
|
|
return nil, errNotList
|
|
case metav1.ListMetaAccessor:
|
|
if m := t.GetListMeta(); m != nil {
|
|
return m, nil
|
|
}
|
|
return nil, errNotList
|
|
case metav1.Object:
|
|
return t, nil
|
|
case metav1.ObjectMetaAccessor:
|
|
if m := t.GetObjectMeta(); m != nil {
|
|
return m, nil
|
|
}
|
|
return nil, errNotList
|
|
default:
|
|
return nil, errNotList
|
|
}
|
|
}
|
|
|
|
// errNotObject is returned when an object implements the List style interfaces but not the Object style
|
|
// interfaces.
|
|
var errNotObject = fmt.Errorf("object does not implement the Object interfaces")
|
|
|
|
// Accessor takes an arbitrary object pointer and returns meta.Interface.
|
|
// obj must be a pointer to an API type. An error is returned if the minimum
|
|
// required fields are missing. Fields that are not required return the default
|
|
// value and are a no-op if set.
|
|
// TODO: return bool instead of error
|
|
func Accessor(obj interface{}) (metav1.Object, error) {
|
|
switch t := obj.(type) {
|
|
case metav1.Object:
|
|
return t, nil
|
|
case metav1.ObjectMetaAccessor:
|
|
if m := t.GetObjectMeta(); m != nil {
|
|
return m, nil
|
|
}
|
|
return nil, errNotObject
|
|
default:
|
|
return nil, errNotObject
|
|
}
|
|
}
|
|
|
|
// TypeAccessor returns an interface that allows retrieving and modifying the APIVersion
|
|
// and Kind of an in-memory internal object.
|
|
// TODO: this interface is used to test code that does not have ObjectMeta or ListMeta
|
|
// in round tripping (objects which can use apiVersion/kind, but do not fit the Kube
|
|
// api conventions).
|
|
func TypeAccessor(obj interface{}) (Type, error) {
|
|
if typed, ok := obj.(runtime.Object); ok {
|
|
return objectAccessor{typed}, nil
|
|
}
|
|
v, err := conversion.EnforcePtr(obj)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
t := v.Type()
|
|
if v.Kind() != reflect.Struct {
|
|
return nil, fmt.Errorf("expected struct, but got %v: %v (%#v)", v.Kind(), t, v.Interface())
|
|
}
|
|
|
|
typeMeta := v.FieldByName("TypeMeta")
|
|
if !typeMeta.IsValid() {
|
|
return nil, fmt.Errorf("struct %v lacks embedded TypeMeta type", t)
|
|
}
|
|
a := &genericAccessor{}
|
|
if err := extractFromTypeMeta(typeMeta, a); err != nil {
|
|
return nil, fmt.Errorf("unable to find type fields on %#v: %v", typeMeta, err)
|
|
}
|
|
return a, nil
|
|
}
|
|
|
|
type objectAccessor struct {
|
|
runtime.Object
|
|
}
|
|
|
|
func (obj objectAccessor) GetKind() string {
|
|
return obj.GetObjectKind().GroupVersionKind().Kind
|
|
}
|
|
|
|
func (obj objectAccessor) SetKind(kind string) {
|
|
gvk := obj.GetObjectKind().GroupVersionKind()
|
|
gvk.Kind = kind
|
|
obj.GetObjectKind().SetGroupVersionKind(gvk)
|
|
}
|
|
|
|
func (obj objectAccessor) GetAPIVersion() string {
|
|
return obj.GetObjectKind().GroupVersionKind().GroupVersion().String()
|
|
}
|
|
|
|
func (obj objectAccessor) SetAPIVersion(version string) {
|
|
gvk := obj.GetObjectKind().GroupVersionKind()
|
|
gv, err := schema.ParseGroupVersion(version)
|
|
if err != nil {
|
|
gv = schema.GroupVersion{Version: version}
|
|
}
|
|
gvk.Group, gvk.Version = gv.Group, gv.Version
|
|
obj.GetObjectKind().SetGroupVersionKind(gvk)
|
|
}
|
|
|
|
// NewAccessor returns a MetadataAccessor that can retrieve
|
|
// or manipulate resource version on objects derived from core API
|
|
// metadata concepts.
|
|
func NewAccessor() MetadataAccessor {
|
|
return resourceAccessor{}
|
|
}
|
|
|
|
// resourceAccessor implements ResourceVersioner and SelfLinker.
|
|
type resourceAccessor struct{}
|
|
|
|
func (resourceAccessor) Kind(obj runtime.Object) (string, error) {
|
|
return objectAccessor{obj}.GetKind(), nil
|
|
}
|
|
|
|
func (resourceAccessor) SetKind(obj runtime.Object, kind string) error {
|
|
objectAccessor{obj}.SetKind(kind)
|
|
return nil
|
|
}
|
|
|
|
func (resourceAccessor) APIVersion(obj runtime.Object) (string, error) {
|
|
return objectAccessor{obj}.GetAPIVersion(), nil
|
|
}
|
|
|
|
func (resourceAccessor) SetAPIVersion(obj runtime.Object, version string) error {
|
|
objectAccessor{obj}.SetAPIVersion(version)
|
|
return nil
|
|
}
|
|
|
|
func (resourceAccessor) Namespace(obj runtime.Object) (string, error) {
|
|
accessor, err := Accessor(obj)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return accessor.GetNamespace(), nil
|
|
}
|
|
|
|
func (resourceAccessor) SetNamespace(obj runtime.Object, namespace string) error {
|
|
accessor, err := Accessor(obj)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
accessor.SetNamespace(namespace)
|
|
return nil
|
|
}
|
|
|
|
func (resourceAccessor) Name(obj runtime.Object) (string, error) {
|
|
accessor, err := Accessor(obj)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return accessor.GetName(), nil
|
|
}
|
|
|
|
func (resourceAccessor) SetName(obj runtime.Object, name string) error {
|
|
accessor, err := Accessor(obj)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
accessor.SetName(name)
|
|
return nil
|
|
}
|
|
|
|
func (resourceAccessor) GenerateName(obj runtime.Object) (string, error) {
|
|
accessor, err := Accessor(obj)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return accessor.GetGenerateName(), nil
|
|
}
|
|
|
|
func (resourceAccessor) SetGenerateName(obj runtime.Object, name string) error {
|
|
accessor, err := Accessor(obj)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
accessor.SetGenerateName(name)
|
|
return nil
|
|
}
|
|
|
|
func (resourceAccessor) UID(obj runtime.Object) (types.UID, error) {
|
|
accessor, err := Accessor(obj)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return accessor.GetUID(), nil
|
|
}
|
|
|
|
func (resourceAccessor) SetUID(obj runtime.Object, uid types.UID) error {
|
|
accessor, err := Accessor(obj)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
accessor.SetUID(uid)
|
|
return nil
|
|
}
|
|
|
|
func (resourceAccessor) SelfLink(obj runtime.Object) (string, error) {
|
|
accessor, err := ListAccessor(obj)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return accessor.GetSelfLink(), nil
|
|
}
|
|
|
|
func (resourceAccessor) SetSelfLink(obj runtime.Object, selfLink string) error {
|
|
accessor, err := ListAccessor(obj)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
accessor.SetSelfLink(selfLink)
|
|
return nil
|
|
}
|
|
|
|
func (resourceAccessor) Labels(obj runtime.Object) (map[string]string, error) {
|
|
accessor, err := Accessor(obj)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return accessor.GetLabels(), nil
|
|
}
|
|
|
|
func (resourceAccessor) SetLabels(obj runtime.Object, labels map[string]string) error {
|
|
accessor, err := Accessor(obj)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
accessor.SetLabels(labels)
|
|
return nil
|
|
}
|
|
|
|
func (resourceAccessor) Annotations(obj runtime.Object) (map[string]string, error) {
|
|
accessor, err := Accessor(obj)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return accessor.GetAnnotations(), nil
|
|
}
|
|
|
|
func (resourceAccessor) SetAnnotations(obj runtime.Object, annotations map[string]string) error {
|
|
accessor, err := Accessor(obj)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
accessor.SetAnnotations(annotations)
|
|
return nil
|
|
}
|
|
|
|
func (resourceAccessor) ResourceVersion(obj runtime.Object) (string, error) {
|
|
accessor, err := ListAccessor(obj)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return accessor.GetResourceVersion(), nil
|
|
}
|
|
|
|
func (resourceAccessor) SetResourceVersion(obj runtime.Object, version string) error {
|
|
accessor, err := ListAccessor(obj)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
accessor.SetResourceVersion(version)
|
|
return nil
|
|
}
|
|
|
|
// extractFromOwnerReference extracts v to o. v is the OwnerReferences field of an object.
|
|
func extractFromOwnerReference(v reflect.Value, o *metav1.OwnerReference) error {
|
|
if err := runtime.Field(v, "APIVersion", &o.APIVersion); err != nil {
|
|
return err
|
|
}
|
|
if err := runtime.Field(v, "Kind", &o.Kind); err != nil {
|
|
return err
|
|
}
|
|
if err := runtime.Field(v, "Name", &o.Name); err != nil {
|
|
return err
|
|
}
|
|
if err := runtime.Field(v, "UID", &o.UID); err != nil {
|
|
return err
|
|
}
|
|
var controllerPtr *bool
|
|
if err := runtime.Field(v, "Controller", &controllerPtr); err != nil {
|
|
return err
|
|
}
|
|
if controllerPtr != nil {
|
|
controller := *controllerPtr
|
|
o.Controller = &controller
|
|
}
|
|
var blockOwnerDeletionPtr *bool
|
|
if err := runtime.Field(v, "BlockOwnerDeletion", &blockOwnerDeletionPtr); err != nil {
|
|
return err
|
|
}
|
|
if blockOwnerDeletionPtr != nil {
|
|
block := *blockOwnerDeletionPtr
|
|
o.BlockOwnerDeletion = &block
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// setOwnerReference sets v to o. v is the OwnerReferences field of an object.
|
|
func setOwnerReference(v reflect.Value, o *metav1.OwnerReference) error {
|
|
if err := runtime.SetField(o.APIVersion, v, "APIVersion"); err != nil {
|
|
return err
|
|
}
|
|
if err := runtime.SetField(o.Kind, v, "Kind"); err != nil {
|
|
return err
|
|
}
|
|
if err := runtime.SetField(o.Name, v, "Name"); err != nil {
|
|
return err
|
|
}
|
|
if err := runtime.SetField(o.UID, v, "UID"); err != nil {
|
|
return err
|
|
}
|
|
if o.Controller != nil {
|
|
controller := *(o.Controller)
|
|
if err := runtime.SetField(&controller, v, "Controller"); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if o.BlockOwnerDeletion != nil {
|
|
block := *(o.BlockOwnerDeletion)
|
|
if err := runtime.SetField(&block, v, "BlockOwnerDeletion"); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// genericAccessor contains pointers to strings that can modify an arbitrary
|
|
// struct and implements the Accessor interface.
|
|
type genericAccessor struct {
|
|
namespace *string
|
|
name *string
|
|
generateName *string
|
|
uid *types.UID
|
|
apiVersion *string
|
|
kind *string
|
|
resourceVersion *string
|
|
selfLink *string
|
|
creationTimestamp *metav1.Time
|
|
deletionTimestamp **metav1.Time
|
|
labels *map[string]string
|
|
annotations *map[string]string
|
|
ownerReferences reflect.Value
|
|
finalizers *[]string
|
|
}
|
|
|
|
func (a genericAccessor) GetNamespace() string {
|
|
if a.namespace == nil {
|
|
return ""
|
|
}
|
|
return *a.namespace
|
|
}
|
|
|
|
func (a genericAccessor) SetNamespace(namespace string) {
|
|
if a.namespace == nil {
|
|
return
|
|
}
|
|
*a.namespace = namespace
|
|
}
|
|
|
|
func (a genericAccessor) GetName() string {
|
|
if a.name == nil {
|
|
return ""
|
|
}
|
|
return *a.name
|
|
}
|
|
|
|
func (a genericAccessor) SetName(name string) {
|
|
if a.name == nil {
|
|
return
|
|
}
|
|
*a.name = name
|
|
}
|
|
|
|
func (a genericAccessor) GetGenerateName() string {
|
|
if a.generateName == nil {
|
|
return ""
|
|
}
|
|
return *a.generateName
|
|
}
|
|
|
|
func (a genericAccessor) SetGenerateName(generateName string) {
|
|
if a.generateName == nil {
|
|
return
|
|
}
|
|
*a.generateName = generateName
|
|
}
|
|
|
|
func (a genericAccessor) GetUID() types.UID {
|
|
if a.uid == nil {
|
|
return ""
|
|
}
|
|
return *a.uid
|
|
}
|
|
|
|
func (a genericAccessor) SetUID(uid types.UID) {
|
|
if a.uid == nil {
|
|
return
|
|
}
|
|
*a.uid = uid
|
|
}
|
|
|
|
func (a genericAccessor) GetAPIVersion() string {
|
|
return *a.apiVersion
|
|
}
|
|
|
|
func (a genericAccessor) SetAPIVersion(version string) {
|
|
*a.apiVersion = version
|
|
}
|
|
|
|
func (a genericAccessor) GetKind() string {
|
|
return *a.kind
|
|
}
|
|
|
|
func (a genericAccessor) SetKind(kind string) {
|
|
*a.kind = kind
|
|
}
|
|
|
|
func (a genericAccessor) GetResourceVersion() string {
|
|
return *a.resourceVersion
|
|
}
|
|
|
|
func (a genericAccessor) SetResourceVersion(version string) {
|
|
*a.resourceVersion = version
|
|
}
|
|
|
|
func (a genericAccessor) GetSelfLink() string {
|
|
return *a.selfLink
|
|
}
|
|
|
|
func (a genericAccessor) SetSelfLink(selfLink string) {
|
|
*a.selfLink = selfLink
|
|
}
|
|
|
|
func (a genericAccessor) GetCreationTimestamp() metav1.Time {
|
|
return *a.creationTimestamp
|
|
}
|
|
|
|
func (a genericAccessor) SetCreationTimestamp(timestamp metav1.Time) {
|
|
*a.creationTimestamp = timestamp
|
|
}
|
|
|
|
func (a genericAccessor) GetDeletionTimestamp() *metav1.Time {
|
|
return *a.deletionTimestamp
|
|
}
|
|
|
|
func (a genericAccessor) SetDeletionTimestamp(timestamp *metav1.Time) {
|
|
*a.deletionTimestamp = timestamp
|
|
}
|
|
|
|
func (a genericAccessor) GetLabels() map[string]string {
|
|
if a.labels == nil {
|
|
return nil
|
|
}
|
|
return *a.labels
|
|
}
|
|
|
|
func (a genericAccessor) SetLabels(labels map[string]string) {
|
|
*a.labels = labels
|
|
}
|
|
|
|
func (a genericAccessor) GetAnnotations() map[string]string {
|
|
if a.annotations == nil {
|
|
return nil
|
|
}
|
|
return *a.annotations
|
|
}
|
|
|
|
func (a genericAccessor) SetAnnotations(annotations map[string]string) {
|
|
if a.annotations == nil {
|
|
emptyAnnotations := make(map[string]string)
|
|
a.annotations = &emptyAnnotations
|
|
}
|
|
*a.annotations = annotations
|
|
}
|
|
|
|
func (a genericAccessor) GetFinalizers() []string {
|
|
if a.finalizers == nil {
|
|
return nil
|
|
}
|
|
return *a.finalizers
|
|
}
|
|
|
|
func (a genericAccessor) SetFinalizers(finalizers []string) {
|
|
*a.finalizers = finalizers
|
|
}
|
|
|
|
func (a genericAccessor) GetOwnerReferences() []metav1.OwnerReference {
|
|
var ret []metav1.OwnerReference
|
|
s := a.ownerReferences
|
|
if s.Kind() != reflect.Ptr || s.Elem().Kind() != reflect.Slice {
|
|
glog.Errorf("expect %v to be a pointer to slice", s)
|
|
return ret
|
|
}
|
|
s = s.Elem()
|
|
// Set the capacity to one element greater to avoid copy if the caller later append an element.
|
|
ret = make([]metav1.OwnerReference, s.Len(), s.Len()+1)
|
|
for i := 0; i < s.Len(); i++ {
|
|
if err := extractFromOwnerReference(s.Index(i), &ret[i]); err != nil {
|
|
glog.Errorf("extractFromOwnerReference failed: %v", err)
|
|
return ret
|
|
}
|
|
}
|
|
return ret
|
|
}
|
|
|
|
func (a genericAccessor) SetOwnerReferences(references []metav1.OwnerReference) {
|
|
s := a.ownerReferences
|
|
if s.Kind() != reflect.Ptr || s.Elem().Kind() != reflect.Slice {
|
|
glog.Errorf("expect %v to be a pointer to slice", s)
|
|
}
|
|
s = s.Elem()
|
|
newReferences := reflect.MakeSlice(s.Type(), len(references), len(references))
|
|
for i := 0; i < len(references); i++ {
|
|
if err := setOwnerReference(newReferences.Index(i), &references[i]); err != nil {
|
|
glog.Errorf("setOwnerReference failed: %v", err)
|
|
return
|
|
}
|
|
}
|
|
s.Set(newReferences)
|
|
}
|
|
|
|
// extractFromTypeMeta extracts pointers to version and kind fields from an object
|
|
func extractFromTypeMeta(v reflect.Value, a *genericAccessor) error {
|
|
if err := runtime.FieldPtr(v, "APIVersion", &a.apiVersion); err != nil {
|
|
return err
|
|
}
|
|
if err := runtime.FieldPtr(v, "Kind", &a.kind); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|