change cluster schema (#2026)

* change cluster schema

* change cluster schema

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

@@ -0,0 +1,70 @@
+/*
+Copyright 2018 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 (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/client-go/dynamic"
+	"k8s.io/client-go/rest"
+)
+
+type ResourceClient interface {
+	Resources(namespace string) dynamic.ResourceInterface
+	Kind() string
+}
+
+type resourceClient struct {
+	client      dynamic.Interface
+	apiResource schema.GroupVersionResource
+	namespaced  bool
+	kind        string
+}
+
+func NewResourceClient(config *rest.Config, apiResource *metav1.APIResource) (ResourceClient, error) {
+	resource := schema.GroupVersionResource{
+		Group:    apiResource.Group,
+		Version:  apiResource.Version,
+		Resource: apiResource.Name,
+	}
+	client, err := dynamic.NewForConfig(config)
+	if err != nil {
+		return nil, err
+	}
+
+	return &resourceClient{
+		client:      client,
+		apiResource: resource,
+		namespaced:  apiResource.Namespaced,
+		kind:        apiResource.Kind,
+	}, nil
+}
+
+func (c *resourceClient) Resources(namespace string) dynamic.ResourceInterface {
+	// TODO(marun) Consider returning Interface instead of
+	// ResourceInterface to allow callers to decide if they want to
+	// invoke Namespace().  Either that, or replace the use of
+	// ResourceClient with the controller-runtime generic client.
+	if c.namespaced {
+		return c.client.Resource(c.apiResource).Namespace(namespace)
+	}
+	return c.client.Resource(c.apiResource)
+}
+
+func (c *resourceClient) Kind() string {
+	return c.kind
+}