change cluster schema (#2026)

* change cluster schema

* change cluster schema

vendor/sigs.k8s.io/kubefed/pkg/controller/util/meta.go

@@ -0,0 +1,139 @@
+/*
+Copyright 2016 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 util
+
+import (
+	"encoding/json"
+	"reflect"
+
+	"github.com/pkg/errors"
+
+	"k8s.io/apimachinery/pkg/api/meta"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/runtime"
+	pkgruntime "k8s.io/apimachinery/pkg/runtime"
+)
+
+// Copies cluster-independent, user provided data from the given ObjectMeta struct. If in
+// the future the ObjectMeta structure is expanded then any field that is not populated
+// by the api server should be included here.
+func copyObjectMeta(obj metav1.ObjectMeta) metav1.ObjectMeta {
+	return metav1.ObjectMeta{
+		Name:            obj.Name,
+		Namespace:       obj.Namespace,
+		Labels:          obj.Labels,
+		Annotations:     obj.Annotations,
+		ResourceVersion: obj.ResourceVersion,
+	}
+}
+
+// Deep copies cluster-independent, user provided data from the given ObjectMeta struct. If in
+// the future the ObjectMeta structure is expanded then any field that is not populated
+// by the api server should be included here.
+func DeepCopyRelevantObjectMeta(obj metav1.ObjectMeta) metav1.ObjectMeta {
+	copyMeta := copyObjectMeta(obj)
+	if obj.Labels != nil {
+		copyMeta.Labels = make(map[string]string)
+		for key, val := range obj.Labels {
+			copyMeta.Labels[key] = val
+		}
+	}
+	if obj.Annotations != nil {
+		copyMeta.Annotations = make(map[string]string)
+		for key, val := range obj.Annotations {
+			copyMeta.Annotations[key] = val
+		}
+	}
+	return copyMeta
+}
+
+// Checks if cluster-independent, user provided data in two given ObjectMeta are equal. If in
+// the future the ObjectMeta structure is expanded then any field that is not populated
+// by the api server should be included here.
+func ObjectMetaEquivalent(a, b metav1.ObjectMeta) bool {
+	if a.Name != b.Name {
+		return false
+	}
+	if a.Namespace != b.Namespace {
+		return false
+	}
+	if !reflect.DeepEqual(a.Labels, b.Labels) && (len(a.Labels) != 0 || len(b.Labels) != 0) {
+		return false
+	}
+	if !reflect.DeepEqual(a.Annotations, b.Annotations) && (len(a.Annotations) != 0 || len(b.Annotations) != 0) {
+		return false
+	}
+	return true
+}
+
+// Checks if cluster-independent, user provided data in two given ObjectMeta are equal. If in
+// the future the ObjectMeta structure is expanded then any field that is not populated
+// by the api server should be included here.
+func ObjectMetaObjEquivalent(a, b metav1.Object) bool {
+	if a.GetName() != b.GetName() {
+		return false
+	}
+	if a.GetNamespace() != b.GetNamespace() {
+		return false
+	}
+	aLabels := a.GetLabels()
+	bLabels := b.GetLabels()
+	if !reflect.DeepEqual(aLabels, bLabels) && (len(aLabels) != 0 || len(bLabels) != 0) {
+		return false
+	}
+	aAnnotations := a.GetAnnotations()
+	bAnnotations := b.GetAnnotations()
+	if !reflect.DeepEqual(aAnnotations, bAnnotations) && (len(aAnnotations) != 0 || len(bAnnotations) != 0) {
+		return false
+	}
+	return true
+}
+
+// Checks if cluster-independent, user provided data in ObjectMeta and Spec in two given top
+// level api objects are equivalent.
+func ObjectMetaAndSpecEquivalent(a, b runtime.Object) bool {
+	objectMetaA := reflect.ValueOf(a).Elem().FieldByName("ObjectMeta").Interface().(metav1.ObjectMeta)
+	objectMetaB := reflect.ValueOf(b).Elem().FieldByName("ObjectMeta").Interface().(metav1.ObjectMeta)
+	specA := reflect.ValueOf(a).Elem().FieldByName("Spec").Interface()
+	specB := reflect.ValueOf(b).Elem().FieldByName("Spec").Interface()
+	return ObjectMetaEquivalent(objectMetaA, objectMetaB) && reflect.DeepEqual(specA, specB)
+}
+
+func MetaAccessor(obj pkgruntime.Object) metav1.Object {
+	accessor, err := meta.Accessor(obj)
+	if err != nil {
+		// This should always succeed if obj is not nil.  Also,
+		// adapters are slated for replacement by unstructured.
+		return nil
+	}
+	return accessor
+}
+
+// GetUnstructured return Unstructured for any given kubernetes type
+func GetUnstructured(resource interface{}) (*unstructured.Unstructured, error) {
+	content, err := json.Marshal(resource)
+	if err != nil {
+		return nil, errors.Wrap(err, "Failed to JSON Marshal")
+	}
+	unstructuredResource := &unstructured.Unstructured{}
+	err = unstructuredResource.UnmarshalJSON(content)
+	if err != nil {
+		return nil, errors.Wrap(err, "Failed to UnmarshalJSON into unstructured content")
+	}
+	return unstructuredResource, nil
+}