Add mapper and typer based on discovery info

pkg/client/typed/dynamic/dynamic_util.go

+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+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 dynamic
+
+import (
+	"fmt"
+
+	"k8s.io/kubernetes/pkg/api/meta"
+	"k8s.io/kubernetes/pkg/api/unversioned"
+	"k8s.io/kubernetes/pkg/runtime"
+)
+
+// VersionInterfaces provides an object converter and metadata
+// accessor appropriate for use with unstructured objects.
+func VersionInterfaces(unversioned.GroupVersion) (*meta.VersionInterfaces, error) {
+	return &meta.VersionInterfaces{
+		ObjectConvertor:  &runtime.UnstructuredObjectConverter{},
+		MetadataAccessor: meta.NewAccessor(),
+	}, nil
+}
+
+// NewDiscoveryRESTMapper returns a RESTMapper based on discovery information.
+func NewDiscoveryRESTMapper(resources []*unversioned.APIResourceList, versionFunc meta.VersionInterfacesFunc) (*meta.DefaultRESTMapper, error) {
+	rm := meta.NewDefaultRESTMapper(nil, versionFunc)
+	for _, resourceList := range resources {
+		gv, err := unversioned.ParseGroupVersion(resourceList.GroupVersion)
+		if err != nil {
+			return nil, err
+		}
+
+		for _, resource := range resourceList.APIResources {
+			gvk := gv.WithKind(resource.Kind)
+			scope := meta.RESTScopeRoot
+			if resource.Namespaced {
+				scope = meta.RESTScopeNamespace
+			}
+			rm.Add(gvk, scope)
+		}
+	}
+	return rm, nil
+}
+
+// ObjectTyper provides an ObjectTyper implmentation for
+// runtime.Unstructured object based on discovery information.
+type ObjectTyper struct {
+	registered map[unversioned.GroupVersionKind]bool
+}
+
+// NewObjectTyper constructs an ObjectTyper from discovery information.
+func NewObjectTyper(resources []*unversioned.APIResourceList) (runtime.ObjectTyper, error) {
+	ot := &ObjectTyper{registered: make(map[unversioned.GroupVersionKind]bool)}
+	for _, resourceList := range resources {
+		gv, err := unversioned.ParseGroupVersion(resourceList.GroupVersion)
+		if err != nil {
+			return nil, err
+		}
+
+		for _, resource := range resourceList.APIResources {
+			ot.registered[gv.WithKind(resource.Kind)] = true
+		}
+	}
+	return ot, nil
+}
+
+// ObjectKind returns the group,version,kind of the provided object,
+// or an error if the object in not *runtime.Unstructured or has no
+// group,version,kind information.
+func (ot *ObjectTyper) ObjectKind(obj runtime.Object) (unversioned.GroupVersionKind, error) {
+	if _, ok := obj.(*runtime.Unstructured); !ok {
+		return unversioned.GroupVersionKind{}, fmt.Errorf("type %T is invalid for dynamic object typer", obj)
+	}
+
+	return obj.GetObjectKind().GroupVersionKind(), nil
+}
+
+// ObjectKinds returns a slice of one element with the
+// group,version,kind of the provided object, or an error if the
+// object is not *runtime.Unstructured or has no group,version,kind
+// information.
+func (ot *ObjectTyper) ObjectKinds(obj runtime.Object) ([]unversioned.GroupVersionKind, error) {
+	gvk, err := ot.ObjectKind(obj)
+	if err != nil {
+		return nil, err
+	}
+
+	return []unversioned.GroupVersionKind{gvk}, nil
+}
+
+// Recognizes returns true if the provided group,version,kind was in
+// the discovery information.
+func (ot *ObjectTyper) Recognizes(gvk unversioned.GroupVersionKind) bool {
+	return ot.registered[gvk]
+}
+
+// IsUnversioned returns false always because *runtime.Unstructured
+// objects should always have group,version,kind information set. ok
+// will be true if the object's group,version,kind is registered.
+func (ot *ObjectTyper) IsUnversioned(obj runtime.Object) (unversioned bool, ok bool) {
+	gvk, err := ot.ObjectKind(obj)
+	if err != nil {
+		return false, false
+	}
+
+	return false, ot.registered[gvk]
+}

pkg/client/typed/dynamic/dynamic_util_test.go

+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+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 dynamic
+
+import (
+	"testing"
+
+	"k8s.io/kubernetes/pkg/api/unversioned"
+)
+
+func TestDiscoveryRESTMapper(t *testing.T) {
+	resources := []*unversioned.APIResourceList{
+		{
+			GroupVersion: "test/beta1",
+			APIResources: []unversioned.APIResource{
+				{
+					Name:       "test_kinds",
+					Namespaced: true,
+					Kind:       "test_kind",
+				},
+			},
+		},
+	}
+
+	gvk := unversioned.GroupVersionKind{
+		Group:   "test",
+		Version: "beta1",
+		Kind:    "test_kind",
+	}
+
+	mapper, err := NewDiscoveryRESTMapper(resources, VersionInterfaces)
+	if err != nil {
+		t.Fatalf("unexpected error creating mapper: %s", err)
+	}
+
+	for _, res := range []unversioned.GroupVersionResource{
+		{
+			Group:    "test",
+			Version:  "beta1",
+			Resource: "test_kinds",
+		},
+		{
+			Version:  "beta1",
+			Resource: "test_kinds",
+		},
+		{
+			Group:    "test",
+			Resource: "test_kinds",
+		},
+		{
+			Resource: "test_kinds",
+		},
+	} {
+		got, err := mapper.KindFor(res)
+		if err != nil {
+			t.Errorf("KindFor(%#v) unexpected error: %s", res, err)
+			continue
+		}
+
+		if got != gvk {
+			t.Errorf("KindFor(%#v) = %#v; want %#v", res, got, gvk)
+		}
+	}
+}