Move list functions from runtime to meta package

pkg/api/meta/help.go

+/*
+Copyright 2015 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 meta
+
+import (
+	"fmt"
+	"reflect"
+
+	"k8s.io/kubernetes/pkg/conversion"
+	"k8s.io/kubernetes/pkg/runtime"
+)
+
+// IsListType returns true if the provided Object has a slice called Items
+func IsListType(obj runtime.Object) bool {
+	_, err := GetItemsPtr(obj)
+	return err == nil
+}
+
+// GetItemsPtr returns a pointer to the list object's Items member.
+// If 'list' doesn't have an Items member, it's not really a list type
+// and an error will be returned.
+// This function will either return a pointer to a slice, or an error, but not both.
+func GetItemsPtr(list runtime.Object) (interface{}, error) {
+	v, err := conversion.EnforcePtr(list)
+	if err != nil {
+		return nil, err
+	}
+	items := v.FieldByName("Items")
+	if !items.IsValid() {
+		return nil, fmt.Errorf("no Items field in %#v", list)
+	}
+	switch items.Kind() {
+	case reflect.Interface, reflect.Ptr:
+		target := reflect.TypeOf(items.Interface()).Elem()
+		if target.Kind() != reflect.Slice {
+			return nil, fmt.Errorf("items: Expected slice, got %s", target.Kind())
+		}
+		return items.Interface(), nil
+	case reflect.Slice:
+		return items.Addr().Interface(), nil
+	default:
+		return nil, fmt.Errorf("items: Expected slice, got %s", items.Kind())
+	}
+}
+
+// ExtractList returns obj's Items element as an array of runtime.Objects.
+// Returns an error if obj is not a List type (does not have an Items member).
+func ExtractList(obj runtime.Object) ([]runtime.Object, error) {
+	itemsPtr, err := GetItemsPtr(obj)
+	if err != nil {
+		return nil, err
+	}
+	items, err := conversion.EnforcePtr(itemsPtr)
+	if err != nil {
+		return nil, err
+	}
+	list := make([]runtime.Object, items.Len())
+	for i := range list {
+		raw := items.Index(i)
+		switch item := raw.Interface().(type) {
+		case runtime.Object:
+			list[i] = item
+		case runtime.RawExtension:
+			list[i] = &runtime.Unknown{
+				RawJSON: item.RawJSON,
+			}
+		default:
+			var found bool
+			if list[i], found = raw.Addr().Interface().(runtime.Object); !found {
+				return nil, fmt.Errorf("%v: item[%v]: Expected object, got %#v(%s)", obj, i, raw.Interface(), raw.Kind())
+			}
+		}
+	}
+	return list, nil
+}
+
+// objectSliceType is the type of a slice of Objects
+var objectSliceType = reflect.TypeOf([]runtime.Object{})
+
+// SetList sets the given list object's Items member have the elements given in
+// objects.
+// Returns an error if list is not a List type (does not have an Items member),
+// or if any of the objects are not of the right type.
+func SetList(list runtime.Object, objects []runtime.Object) error {
+	itemsPtr, err := GetItemsPtr(list)
+	if err != nil {
+		return err
+	}
+	items, err := conversion.EnforcePtr(itemsPtr)
+	if err != nil {
+		return err
+	}
+	if items.Type() == objectSliceType {
+		items.Set(reflect.ValueOf(objects))
+		return nil
+	}
+	slice := reflect.MakeSlice(items.Type(), len(objects), len(objects))
+	for i := range objects {
+		dest := slice.Index(i)
+		src, err := conversion.EnforcePtr(objects[i])
+		if err != nil {
+			return err
+		}
+		if src.Type().AssignableTo(dest.Type()) {
+			dest.Set(src)
+		} else if src.Type().ConvertibleTo(dest.Type()) {
+			dest.Set(src.Convert(dest.Type()))
+		} else {
+			return fmt.Errorf("item[%d]: Type mismatch: Expected %v, got %v", i, dest.Type(), src.Type())
+		}
+	}
+	items.Set(slice)
+	return nil
+}

pkg/api/meta/help_test.go

+/*
+Copyright 2014 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 meta_test
+
+import (
+	"reflect"
+	"testing"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/meta"
+	"k8s.io/kubernetes/pkg/api/v1"
+	"k8s.io/kubernetes/pkg/runtime"
+	"k8s.io/kubernetes/pkg/util"
+
+	"github.com/google/gofuzz"
+)
+
+func TestIsList(t *testing.T) {
+	tests := []struct {
+		obj    runtime.Object
+		isList bool
+	}{
+		{&api.PodList{}, true},
+		{&api.Pod{}, false},
+	}
+	for _, item := range tests {
+		if e, a := item.isList, meta.IsListType(item.obj); e != a {
+			t.Errorf("%v: Expected %v, got %v", reflect.TypeOf(item.obj), e, a)
+		}
+	}
+}
+
+func TestExtractList(t *testing.T) {
+	pl := &api.PodList{
+		Items: []api.Pod{
+			{ObjectMeta: api.ObjectMeta{Name: "1"}},
+			{ObjectMeta: api.ObjectMeta{Name: "2"}},
+			{ObjectMeta: api.ObjectMeta{Name: "3"}},
+		},
+	}
+	list, err := meta.ExtractList(pl)
+	if err != nil {
+		t.Fatalf("Unexpected error %v", err)
+	}
+	if e, a := len(list), len(pl.Items); e != a {
+		t.Fatalf("Expected %v, got %v", e, a)
+	}
+	for i := range list {
+		if e, a := list[i].(*api.Pod).Name, pl.Items[i].Name; e != a {
+			t.Fatalf("Expected %v, got %v", e, a)
+		}
+	}
+}
+
+func TestExtractListGeneric(t *testing.T) {
+	pl := &api.List{
+		Items: []runtime.Object{
+			&api.Pod{ObjectMeta: api.ObjectMeta{Name: "1"}},
+			&api.Service{ObjectMeta: api.ObjectMeta{Name: "2"}},
+		},
+	}
+	list, err := meta.ExtractList(pl)
+	if err != nil {
+		t.Fatalf("Unexpected error %v", err)
+	}
+	if e, a := len(list), len(pl.Items); e != a {
+		t.Fatalf("Expected %v, got %v", e, a)
+	}
+	if obj, ok := list[0].(*api.Pod); !ok {
+		t.Fatalf("Expected list[0] to be *api.Pod, it is %#v", obj)
+	}
+	if obj, ok := list[1].(*api.Service); !ok {
+		t.Fatalf("Expected list[1] to be *api.Service, it is %#v", obj)
+	}
+}
+
+func TestExtractListGenericV1(t *testing.T) {
+	pl := &v1.List{
+		Items: []runtime.RawExtension{
+			{RawJSON: []byte("foo")},
+			{RawJSON: []byte("bar")},
+		},
+	}
+	list, err := meta.ExtractList(pl)
+	if err != nil {
+		t.Fatalf("Unexpected error %v", err)
+	}
+	if e, a := len(list), len(pl.Items); e != a {
+		t.Fatalf("Expected %v, got %v", e, a)
+	}
+	if obj, ok := list[0].(*runtime.Unknown); !ok {
+		t.Fatalf("Expected list[0] to be *runtime.Unknown, it is %#v", obj)
+	}
+	if obj, ok := list[1].(*runtime.Unknown); !ok {
+		t.Fatalf("Expected list[1] to be *runtime.Unknown, it is %#v", obj)
+	}
+}
+
+type fakePtrInterfaceList struct {
+	Items *[]runtime.Object
+}
+
+func (f fakePtrInterfaceList) IsAnAPIObject() {}
+
+func TestExtractListOfInterfacePtrs(t *testing.T) {
+	pl := &fakePtrInterfaceList{
+		Items: &[]runtime.Object{},
+	}
+	list, err := meta.ExtractList(pl)
+	if err != nil {
+		t.Fatalf("Unexpected error %v", err)
+	}
+	if len(list) > 0 {
+		t.Fatalf("Expected empty list, got %#v", list)
+	}
+}
+
+type fakePtrValueList struct {
+	Items []*api.Pod
+}
+
+func (f fakePtrValueList) IsAnAPIObject() {}
+
+func TestExtractListOfValuePtrs(t *testing.T) {
+	pl := &fakePtrValueList{
+		Items: []*api.Pod{
+			{ObjectMeta: api.ObjectMeta{Name: "1"}},
+			{ObjectMeta: api.ObjectMeta{Name: "2"}},
+		},
+	}
+	list, err := meta.ExtractList(pl)
+	if err != nil {
+		t.Fatalf("Unexpected error %v", err)
+	}
+	if e, a := len(list), len(pl.Items); e != a {
+		t.Fatalf("Expected %v, got %v", e, a)
+	}
+	for i := range list {
+		if obj, ok := list[i].(*api.Pod); !ok {
+			t.Fatalf("Expected list[%d] to be *api.Pod, it is %#v", i, obj)
+		}
+	}
+}
+
+func TestSetList(t *testing.T) {
+	pl := &api.PodList{}
+	list := []runtime.Object{
+		&api.Pod{ObjectMeta: api.ObjectMeta{Name: "1"}},
+		&api.Pod{ObjectMeta: api.ObjectMeta{Name: "2"}},
+		&api.Pod{ObjectMeta: api.ObjectMeta{Name: "3"}},
+	}
+	err := meta.SetList(pl, list)
+	if err != nil {
+		t.Fatalf("Unexpected error %v", err)
+	}
+	if e, a := len(list), len(pl.Items); e != a {
+		t.Fatalf("Expected %v, got %v", e, a)
+	}
+	for i := range list {
+		if e, a := list[i].(*api.Pod).Name, pl.Items[i].Name; e != a {
+			t.Fatalf("Expected %v, got %v", e, a)
+		}
+	}
+}
+
+func TestSetListToRuntimeObjectArray(t *testing.T) {
+	pl := &api.List{}
+	list := []runtime.Object{
+		&api.Pod{ObjectMeta: api.ObjectMeta{Name: "1"}},
+		&api.Pod{ObjectMeta: api.ObjectMeta{Name: "2"}},
+		&api.Pod{ObjectMeta: api.ObjectMeta{Name: "3"}},
+	}
+	err := meta.SetList(pl, list)
+	if err != nil {
+		t.Fatalf("Unexpected error %v", err)
+	}
+	if e, a := len(list), len(pl.Items); e != a {
+		t.Fatalf("Expected %v, got %v", e, a)
+	}
+	for i := range list {
+		if e, a := list[i], pl.Items[i]; e != a {
+			t.Fatalf("%d: unmatched: %s", i, util.ObjectDiff(e, a))
+		}
+	}
+}
+
+func TestSetExtractListRoundTrip(t *testing.T) {
+	fuzzer := fuzz.New().NilChance(0).NumElements(1, 5)
+	for i := 0; i < 5; i++ {
+		start := &api.PodList{}
+		fuzzer.Fuzz(&start.Items)
+
+		list, err := meta.ExtractList(start)
+		if err != nil {
+			t.Errorf("Unexpected error %v", err)
+			continue
+		}
+		got := &api.PodList{}
+		err = meta.SetList(got, list)
+		if err != nil {
+			t.Errorf("Unexpected error %v", err)
+			continue
+		}
+		if e, a := start, got; !reflect.DeepEqual(e, a) {
+			t.Fatalf("Expected %#v, got %#v", e, a)
+		}
+	}
+}

pkg/apiserver/resthandler.go

@@ -29,6 +29,7 @@ import (
 	"k8s.io/kubernetes/pkg/admission"
 	"k8s.io/kubernetes/pkg/api"
 	"k8s.io/kubernetes/pkg/api/errors"
+	"k8s.io/kubernetes/pkg/api/meta"
 	"k8s.io/kubernetes/pkg/api/rest"
 	"k8s.io/kubernetes/pkg/api/unversioned"
 	"k8s.io/kubernetes/pkg/fields"
@@ -793,7 +794,7 @@ func checkName(obj runtime.Object, name, namespace string, namer ScopeNamer) err
 // setListSelfLink sets the self link of a list to the base URL, then sets the self links
 // on all child objects returned.
 func setListSelfLink(obj runtime.Object, req *restful.Request, namer ScopeNamer) error {
-	if !runtime.IsListType(obj) {
+	if !meta.IsListType(obj) {
 		return nil
 	}
 
@@ -812,7 +813,7 @@ func setListSelfLink(obj runtime.Object, req *restful.Request, namer ScopeNamer)
 	}
 
 	// Set self-link of objects in the list.
-	items, err := runtime.ExtractList(obj)
+	items, err := meta.ExtractList(obj)
 	if err != nil {
 		return err
 	}
@@ -821,7 +822,7 @@ func setListSelfLink(obj runtime.Object, req *restful.Request, namer ScopeNamer)
 			return err
 		}
 	}
-	return runtime.SetList(obj, items)
+	return meta.SetList(obj, items)
 
 }
 

pkg/client/cache/reflector.go

@@ -231,12 +231,12 @@ func (r *Reflector) ListAndWatch(stopCh <-chan struct{}) error {
 	if err != nil {
 		return fmt.Errorf("%s: Failed to list %v: %v", r.name, r.expectedType, err)
 	}
-	meta, err := meta.Accessor(list)
+	metaInterface, err := meta.Accessor(list)
 	if err != nil {
 		return fmt.Errorf("%s: Unable to understand list result %#v", r.name, list)
 	}
-	resourceVersion = meta.ResourceVersion()
-	items, err := runtime.ExtractList(list)
+	resourceVersion = metaInterface.ResourceVersion()
+	items, err := meta.ExtractList(list)
 	if err != nil {
 		return fmt.Errorf("%s: Unable to understand list result %#v (%v)", r.name, list, err)
 	}

pkg/client/unversioned/testclient/fixture.go

@@ -167,7 +167,7 @@ func (o objects) Kind(kind, name string) (runtime.Object, error) {
 			if err != nil {
 				return nilValue, err
 			}
-			if err := runtime.SetList(out, arr); err != nil {
+			if err := meta.SetList(out, arr); err != nil {
 				return nilValue, err
 			}
 			if out, err = o.scheme.Copy(out); err != nil {
@@ -210,12 +210,12 @@ func (o objects) Add(obj runtime.Object) error {
 	}
 
 	switch {
-	case runtime.IsListType(obj):
+	case meta.IsListType(obj):
 		if kind != "List" {
 			o.types[kind] = append(o.types[kind], obj)
 		}
 
-		list, err := runtime.ExtractList(obj)
+		list, err := meta.ExtractList(obj)
 		if err != nil {
 			return err
 		}

pkg/controller/framework/fake_controller_source.go

@@ -23,6 +23,7 @@ import (
 	"sync"
 
 	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/meta"
 	"k8s.io/kubernetes/pkg/runtime"
 	"k8s.io/kubernetes/pkg/types"
 	"k8s.io/kubernetes/pkg/watch"
@@ -136,7 +137,7 @@ func (f *FakeControllerSource) List() (runtime.Object, error) {
 		list = append(list, objCopy.(runtime.Object))
 	}
 	listObj := &api.List{}
-	if err := runtime.SetList(listObj, list); err != nil {
+	if err := meta.SetList(listObj, list); err != nil {
 		return nil, err
 	}
 	objMeta, err := api.ListMetaFor(listObj)

pkg/kubectl/cmd/get_test.go

@@ -28,6 +28,7 @@ import (
 	"testing"
 
 	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/meta"
 	"k8s.io/kubernetes/pkg/api/testapi"
 	apitesting "k8s.io/kubernetes/pkg/api/testing"
 	"k8s.io/kubernetes/pkg/api/unversioned"
@@ -331,7 +332,7 @@ func TestGetListObjects(t *testing.T) {
 func extractResourceList(objs []runtime.Object) ([]runtime.Object, error) {
 	finalObjs := []runtime.Object{}
 	for _, obj := range objs {
-		items, err := runtime.ExtractList(obj)
+		items, err := meta.ExtractList(obj)
 		if err != nil {
 			return nil, err
 		}
@@ -477,14 +478,14 @@ func TestGetMultipleTypeObjectsAsList(t *testing.T) {
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
-	list, err := runtime.ExtractList(out)
+	list, err := meta.ExtractList(out)
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
 	if errs := runtime.DecodeList(list, api.Scheme); len(errs) > 0 {
 		t.Fatalf("unexpected error: %v", errs)
 	}
-	if err := runtime.SetList(out, list); err != nil {
+	if err := meta.SetList(out, list); err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
 

pkg/kubectl/custom_column_printer.go

@@ -27,6 +27,7 @@ import (
 	"text/tabwriter"
 
 	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/meta"
 	"k8s.io/kubernetes/pkg/runtime"
 	"k8s.io/kubernetes/pkg/util/jsonpath"
 )
@@ -168,8 +169,8 @@ func (s *CustomColumnsPrinter) PrintObj(obj runtime.Object, out io.Writer) error
 		}
 	}
 
-	if runtime.IsListType(obj) {
-		objs, err := runtime.ExtractList(obj)
+	if meta.IsListType(obj) {
+		objs, err := meta.ExtractList(obj)
 		if err != nil {
 			return err
 		}

pkg/kubectl/resource/result.go

@@ -138,7 +138,7 @@ func (r *Result) Object() (runtime.Object, error) {
 			return objects[0], nil
 		}
 		// if the item is a list already, don't create another list
-		if runtime.IsListType(objects[0]) {
+		if meta.IsListType(objects[0]) {
 			return objects[0], nil
 		}
 	}

pkg/kubectl/resource/visitor.go

@@ -335,7 +335,7 @@ func (v FlattenListVisitor) Visit(fn VisitorFunc) error {
 		if info.Object == nil {
 			return fn(info, nil)
 		}
-		items, err := runtime.ExtractList(info.Object)
+		items, err := meta.ExtractList(info.Object)
 		if err != nil {
 			return fn(info, nil)
 		}
@@ -564,7 +564,7 @@ func RetrieveLatest(info *Info, err error) error {
 	if err != nil {
 		return err
 	}
-	if runtime.IsListType(info.Object) {
+	if meta.IsListType(info.Object) {
 		return fmt.Errorf("watch is only supported on individual resources and resource collections, but a list of resources is found")
 	}
 	if len(info.Name) == 0 {

pkg/kubectl/sorting_printer.go

@@ -23,6 +23,7 @@ import (
 	"sort"
 
 	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/meta"
 	"k8s.io/kubernetes/pkg/api/v1"
 	"k8s.io/kubernetes/pkg/runtime"
 	"k8s.io/kubernetes/pkg/util/jsonpath"
@@ -38,7 +39,7 @@ type SortingPrinter struct {
 }
 
 func (s *SortingPrinter) PrintObj(obj runtime.Object, out io.Writer) error {
-	if !runtime.IsListType(obj) {
+	if !meta.IsListType(obj) {
 		return s.Delegate.PrintObj(obj, out)
 	}
 
@@ -54,7 +55,7 @@ func (p *SortingPrinter) HandledResources() []string {
 }
 
 func (s *SortingPrinter) sortObj(obj runtime.Object) error {
-	objs, err := runtime.ExtractList(obj)
+	objs, err := meta.ExtractList(obj)
 	if err != nil {
 		return err
 	}
@@ -76,7 +77,7 @@ func (s *SortingPrinter) sortObj(obj runtime.Object) error {
 		list.Items = outputList
 		return nil
 	}
-	return runtime.SetList(obj, objs)
+	return meta.SetList(obj, objs)
 }
 
 func SortObjects(objs []runtime.Object, fieldInput string) (*RuntimeSort, error) {

pkg/runtime/embedded_test.go

@@ -22,6 +22,7 @@ import (
 	"testing"
 
 	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/meta"
 	"k8s.io/kubernetes/pkg/runtime"
 	"k8s.io/kubernetes/pkg/util"
 )
@@ -119,7 +120,7 @@ func TestArrayOfRuntimeObject(t *testing.T) {
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
-	list, err := runtime.ExtractList(decoded)
+	list, err := meta.ExtractList(decoded)
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
@@ -127,14 +128,14 @@ func TestArrayOfRuntimeObject(t *testing.T) {
 		t.Fatalf("unexpected error: %v", errs)
 	}
 
-	list2, err := runtime.ExtractList(list[3])
+	list2, err := meta.ExtractList(list[3])
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
 	if errs := runtime.DecodeList(list2, s); len(errs) > 0 {
 		t.Fatalf("unexpected error: %v", errs)
 	}
-	if err := runtime.SetList(list[3], list2); err != nil {
+	if err := meta.SetList(list[3], list2); err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
 

pkg/runtime/helper.go

@@ -23,111 +23,6 @@ import (
 	"k8s.io/kubernetes/pkg/conversion"
 )
 
-// IsListType returns true if the provided Object has a slice called Items
-func IsListType(obj Object) bool {
-	_, err := GetItemsPtr(obj)
-	return err == nil
-}
-
-// GetItemsPtr returns a pointer to the list object's Items member.
-// If 'list' doesn't have an Items member, it's not really a list type
-// and an error will be returned.
-// This function will either return a pointer to a slice, or an error, but not both.
-func GetItemsPtr(list Object) (interface{}, error) {
-	v, err := conversion.EnforcePtr(list)
-	if err != nil {
-		return nil, err
-	}
-	items := v.FieldByName("Items")
-	if !items.IsValid() {
-		return nil, fmt.Errorf("no Items field in %#v", list)
-	}
-	switch items.Kind() {
-	case reflect.Interface, reflect.Ptr:
-		target := reflect.TypeOf(items.Interface()).Elem()
-		if target.Kind() != reflect.Slice {
-			return nil, fmt.Errorf("items: Expected slice, got %s", target.Kind())
-		}
-		return items.Interface(), nil
-	case reflect.Slice:
-		return items.Addr().Interface(), nil
-	default:
-		return nil, fmt.Errorf("items: Expected slice, got %s", items.Kind())
-	}
-}
-
-// ExtractList returns obj's Items element as an array of runtime.Objects.
-// Returns an error if obj is not a List type (does not have an Items member).
-// TODO: move me to pkg/api/meta
-func ExtractList(obj Object) ([]Object, error) {
-	itemsPtr, err := GetItemsPtr(obj)
-	if err != nil {
-		return nil, err
-	}
-	items, err := conversion.EnforcePtr(itemsPtr)
-	if err != nil {
-		return nil, err
-	}
-	list := make([]Object, items.Len())
-	for i := range list {
-		raw := items.Index(i)
-		switch item := raw.Interface().(type) {
-		case Object:
-			list[i] = item
-		case RawExtension:
-			list[i] = &Unknown{
-				RawJSON: item.RawJSON,
-			}
-		default:
-			var found bool
-			if list[i], found = raw.Addr().Interface().(Object); !found {
-				return nil, fmt.Errorf("%v: item[%v]: Expected object, got %#v(%s)", obj, i, raw.Interface(), raw.Kind())
-			}
-		}
-	}
-	return list, nil
-}
-
-// objectSliceType is the type of a slice of Objects
-var objectSliceType = reflect.TypeOf([]Object{})
-
-// SetList sets the given list object's Items member have the elements given in
-// objects.
-// Returns an error if list is not a List type (does not have an Items member),
-// or if any of the objects are not of the right type.
-// TODO: move me to pkg/api/meta
-func SetList(list Object, objects []Object) error {
-	itemsPtr, err := GetItemsPtr(list)
-	if err != nil {
-		return err
-	}
-	items, err := conversion.EnforcePtr(itemsPtr)
-	if err != nil {
-		return err
-	}
-	if items.Type() == objectSliceType {
-		items.Set(reflect.ValueOf(objects))
-		return nil
-	}
-	slice := reflect.MakeSlice(items.Type(), len(objects), len(objects))
-	for i := range objects {
-		dest := slice.Index(i)
-		src, err := conversion.EnforcePtr(objects[i])
-		if err != nil {
-			return err
-		}
-		if src.Type().AssignableTo(dest.Type()) {
-			dest.Set(src)
-		} else if src.Type().ConvertibleTo(dest.Type()) {
-			dest.Set(src.Convert(dest.Type()))
-		} else {
-			return fmt.Errorf("item[%d]: Type mismatch: Expected %v, got %v", i, dest.Type(), src.Type())
-		}
-	}
-	items.Set(slice)
-	return nil
-}
-
 // fieldPtr puts the address of fieldName, which must be a member of v,
 // into dest, which must be an address of a variable to which this field's
 // address can be assigned.

pkg/runtime/helper_test.go

@@ -17,145 +17,13 @@ limitations under the License.
 package runtime_test
 
 import (
-	"reflect"
 	"testing"
 
 	"k8s.io/kubernetes/pkg/api"
 	"k8s.io/kubernetes/pkg/api/testapi"
-	"k8s.io/kubernetes/pkg/api/v1"
 	"k8s.io/kubernetes/pkg/runtime"
-	"k8s.io/kubernetes/pkg/util"
-
-	"github.com/google/gofuzz"
 )
 
-func TestIsList(t *testing.T) {
-	tests := []struct {
-		obj    runtime.Object
-		isList bool
-	}{
-		{&api.PodList{}, true},
-		{&api.Pod{}, false},
-	}
-	for _, item := range tests {
-		if e, a := item.isList, runtime.IsListType(item.obj); e != a {
-			t.Errorf("%v: Expected %v, got %v", reflect.TypeOf(item.obj), e, a)
-		}
-	}
-}
-
-func TestExtractList(t *testing.T) {
-	pl := &api.PodList{
-		Items: []api.Pod{
-			{ObjectMeta: api.ObjectMeta{Name: "1"}},
-			{ObjectMeta: api.ObjectMeta{Name: "2"}},
-			{ObjectMeta: api.ObjectMeta{Name: "3"}},
-		},
-	}
-	list, err := runtime.ExtractList(pl)
-	if err != nil {
-		t.Fatalf("Unexpected error %v", err)
-	}
-	if e, a := len(list), len(pl.Items); e != a {
-		t.Fatalf("Expected %v, got %v", e, a)
-	}
-	for i := range list {
-		if e, a := list[i].(*api.Pod).Name, pl.Items[i].Name; e != a {
-			t.Fatalf("Expected %v, got %v", e, a)
-		}
-	}
-}
-
-func TestExtractListGeneric(t *testing.T) {
-	pl := &api.List{
-		Items: []runtime.Object{
-			&api.Pod{ObjectMeta: api.ObjectMeta{Name: "1"}},
-			&api.Service{ObjectMeta: api.ObjectMeta{Name: "2"}},
-		},
-	}
-	list, err := runtime.ExtractList(pl)
-	if err != nil {
-		t.Fatalf("Unexpected error %v", err)
-	}
-	if e, a := len(list), len(pl.Items); e != a {
-		t.Fatalf("Expected %v, got %v", e, a)
-	}
-	if obj, ok := list[0].(*api.Pod); !ok {
-		t.Fatalf("Expected list[0] to be *api.Pod, it is %#v", obj)
-	}
-	if obj, ok := list[1].(*api.Service); !ok {
-		t.Fatalf("Expected list[1] to be *api.Service, it is %#v", obj)
-	}
-}
-
-func TestExtractListGenericV1(t *testing.T) {
-	pl := &v1.List{
-		Items: []runtime.RawExtension{
-			{RawJSON: []byte("foo")},
-			{RawJSON: []byte("bar")},
-		},
-	}
-	list, err := runtime.ExtractList(pl)
-	if err != nil {
-		t.Fatalf("Unexpected error %v", err)
-	}
-	if e, a := len(list), len(pl.Items); e != a {
-		t.Fatalf("Expected %v, got %v", e, a)
-	}
-	if obj, ok := list[0].(*runtime.Unknown); !ok {
-		t.Fatalf("Expected list[0] to be *runtime.Unknown, it is %#v", obj)
-	}
-	if obj, ok := list[1].(*runtime.Unknown); !ok {
-		t.Fatalf("Expected list[1] to be *runtime.Unknown, it is %#v", obj)
-	}
-}
-
-type fakePtrInterfaceList struct {
-	Items *[]runtime.Object
-}
-
-func (f fakePtrInterfaceList) IsAnAPIObject() {}
-
-func TestExtractListOfInterfacePtrs(t *testing.T) {
-	pl := &fakePtrInterfaceList{
-		Items: &[]runtime.Object{},
-	}
-	list, err := runtime.ExtractList(pl)
-	if err != nil {
-		t.Fatalf("Unexpected error %v", err)
-	}
-	if len(list) > 0 {
-		t.Fatalf("Expected empty list, got %#v", list)
-	}
-}
-
-type fakePtrValueList struct {
-	Items []*api.Pod
-}
-
-func (f fakePtrValueList) IsAnAPIObject() {}
-
-func TestExtractListOfValuePtrs(t *testing.T) {
-	pl := &fakePtrValueList{
-		Items: []*api.Pod{
-			{ObjectMeta: api.ObjectMeta{Name: "1"}},
-			{ObjectMeta: api.ObjectMeta{Name: "2"}},
-		},
-	}
-	list, err := runtime.ExtractList(pl)
-	if err != nil {
-		t.Fatalf("Unexpected error %v", err)
-	}
-	if e, a := len(list), len(pl.Items); e != a {
-		t.Fatalf("Expected %v, got %v", e, a)
-	}
-	for i := range list {
-		if obj, ok := list[i].(*api.Pod); !ok {
-			t.Fatalf("Expected list[%d] to be *api.Pod, it is %#v", i, obj)
-		}
-	}
-}
-
 func TestDecodeList(t *testing.T) {
 	pl := &api.List{
 		Items: []runtime.Object{
@@ -171,68 +39,3 @@ func TestDecodeList(t *testing.T) {
 		t.Errorf("object not converted: %#v", pl.Items[1])
 	}
 }
-
-func TestSetList(t *testing.T) {
-	pl := &api.PodList{}
-	list := []runtime.Object{
-		&api.Pod{ObjectMeta: api.ObjectMeta{Name: "1"}},
-		&api.Pod{ObjectMeta: api.ObjectMeta{Name: "2"}},
-		&api.Pod{ObjectMeta: api.ObjectMeta{Name: "3"}},
-	}
-	err := runtime.SetList(pl, list)
-	if err != nil {
-		t.Fatalf("Unexpected error %v", err)
-	}
-	if e, a := len(list), len(pl.Items); e != a {
-		t.Fatalf("Expected %v, got %v", e, a)
-	}
-	for i := range list {
-		if e, a := list[i].(*api.Pod).Name, pl.Items[i].Name; e != a {
-			t.Fatalf("Expected %v, got %v", e, a)
-		}
-	}
-}
-
-func TestSetListToRuntimeObjectArray(t *testing.T) {
-	pl := &api.List{}
-	list := []runtime.Object{
-		&api.Pod{ObjectMeta: api.ObjectMeta{Name: "1"}},
-		&api.Pod{ObjectMeta: api.ObjectMeta{Name: "2"}},
-		&api.Pod{ObjectMeta: api.ObjectMeta{Name: "3"}},
-	}
-	err := runtime.SetList(pl, list)
-	if err != nil {
-		t.Fatalf("Unexpected error %v", err)
-	}
-	if e, a := len(list), len(pl.Items); e != a {
-		t.Fatalf("Expected %v, got %v", e, a)
-	}
-	for i := range list {
-		if e, a := list[i], pl.Items[i]; e != a {
-			t.Fatalf("%d: unmatched: %s", i, util.ObjectDiff(e, a))
-		}
-	}
-}
-
-func TestSetExtractListRoundTrip(t *testing.T) {
-	fuzzer := fuzz.New().NilChance(0).NumElements(1, 5)
-	for i := 0; i < 5; i++ {
-		start := &api.PodList{}
-		fuzzer.Fuzz(&start.Items)
-
-		list, err := runtime.ExtractList(start)
-		if err != nil {
-			t.Errorf("Unexpected error %v", err)
-			continue
-		}
-		got := &api.PodList{}
-		err = runtime.SetList(got, list)
-		if err != nil {
-			t.Errorf("Unexpected error %v", err)
-			continue
-		}
-		if e, a := start, got; !reflect.DeepEqual(e, a) {
-			t.Fatalf("Expected %#v, got %#v", e, a)
-		}
-	}
-}

pkg/storage/cacher.go

@@ -25,6 +25,7 @@ import (
 	"time"
 
 	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/meta"
 	"k8s.io/kubernetes/pkg/client/cache"
 	"k8s.io/kubernetes/pkg/conversion"
 	"k8s.io/kubernetes/pkg/runtime"
@@ -276,7 +277,7 @@ func (c *Cacher) List(ctx context.Context, key string, resourceVersion uint64, f
 	c.usable.RUnlock()
 
 	// List elements from cache, with at least 'resourceVersion'.
-	listPtr, err := runtime.GetItemsPtr(listObj)
+	listPtr, err := meta.GetItemsPtr(listObj)
 	if err != nil {
 		return err
 	}

pkg/storage/etcd/etcd_helper.go

@@ -26,6 +26,7 @@ import (
 
 	"github.com/coreos/go-etcd/etcd"
 	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/meta"
 	"k8s.io/kubernetes/pkg/conversion"
 	"k8s.io/kubernetes/pkg/runtime"
 	"k8s.io/kubernetes/pkg/storage"
@@ -273,7 +274,7 @@ func (h *etcdHelper) GetToList(ctx context.Context, key string, filter storage.F
 		glog.Errorf("Context is nil")
 	}
 	trace := util.NewTrace("GetToList " + getTypeName(listObj))
-	listPtr, err := runtime.GetItemsPtr(listObj)
+	listPtr, err := meta.GetItemsPtr(listObj)
 	if err != nil {
 		return err
 	}
@@ -356,7 +357,7 @@ func (h *etcdHelper) List(ctx context.Context, key string, resourceVersion uint6
 	}
 	trace := util.NewTrace("List " + getTypeName(listObj))
 	defer trace.LogIfLong(time.Second)
-	listPtr, err := runtime.GetItemsPtr(listObj)
+	listPtr, err := meta.GetItemsPtr(listObj)
 	if err != nil {
 		return err
 	}

pkg/storage/testing/utils.go

@@ -49,7 +49,7 @@ func CreateObjList(prefix string, helper storage.Interface, items []runtime.Obje
 
 // CreateList will properly create a list using the storage interface
 func CreateList(prefix string, helper storage.Interface, list runtime.Object) error {
-	items, err := runtime.ExtractList(list)
+	items, err := meta.ExtractList(list)
 	if err != nil {
 		return err
 	}
@@ -57,5 +57,5 @@ func CreateList(prefix string, helper storage.Interface, list runtime.Object) er
 	if err != nil {
 		return err
 	}
-	return runtime.SetList(list, items)
+	return meta.SetList(list, items)
 }