Import of https://github.com/ciena/voltctl at commit 40d61fbf3f910ed4017cf67c9c79e8e1f82a33a5
Change-Id: I8464c59e60d76cb8612891db3303878975b5416c
diff --git a/vendor/k8s.io/apimachinery/pkg/api/meta/help.go b/vendor/k8s.io/apimachinery/pkg/api/meta/help.go
new file mode 100644
index 0000000..c70b3d2
--- /dev/null
+++ b/vendor/k8s.io/apimachinery/pkg/api/meta/help.go
@@ -0,0 +1,205 @@
+/*
+Copyright 2015 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"
+
+ "k8s.io/apimachinery/pkg/conversion"
+ "k8s.io/apimachinery/pkg/runtime"
+)
+
+// IsListType returns true if the provided Object has a slice called Items
+func IsListType(obj runtime.Object) bool {
+ // if we're a runtime.Unstructured, check whether this is a list.
+ // TODO: refactor GetItemsPtr to use an interface that returns []runtime.Object
+ if unstructured, ok := obj.(runtime.Unstructured); ok {
+ return unstructured.IsList()
+ }
+
+ _, 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())
+ }
+}
+
+// EachListItem invokes fn on each runtime.Object in the list. Any error immediately terminates
+// the loop.
+func EachListItem(obj runtime.Object, fn func(runtime.Object) error) error {
+ if unstructured, ok := obj.(runtime.Unstructured); ok {
+ return unstructured.EachListItem(fn)
+ }
+ // TODO: Change to an interface call?
+ itemsPtr, err := GetItemsPtr(obj)
+ if err != nil {
+ return err
+ }
+ items, err := conversion.EnforcePtr(itemsPtr)
+ if err != nil {
+ return err
+ }
+ len := items.Len()
+ if len == 0 {
+ return nil
+ }
+ takeAddr := false
+ if elemType := items.Type().Elem(); elemType.Kind() != reflect.Ptr && elemType.Kind() != reflect.Interface {
+ if !items.Index(0).CanAddr() {
+ return fmt.Errorf("unable to take address of items in %T for EachListItem", obj)
+ }
+ takeAddr = true
+ }
+
+ for i := 0; i < len; i++ {
+ raw := items.Index(i)
+ if takeAddr {
+ raw = raw.Addr()
+ }
+ switch item := raw.Interface().(type) {
+ case *runtime.RawExtension:
+ if err := fn(item.Object); err != nil {
+ return err
+ }
+ case runtime.Object:
+ if err := fn(item); err != nil {
+ return err
+ }
+ default:
+ obj, ok := item.(runtime.Object)
+ if !ok {
+ return fmt.Errorf("%v: item[%v]: Expected object, got %#v(%s)", obj, i, raw.Interface(), raw.Kind())
+ }
+ if err := fn(obj); err != nil {
+ return err
+ }
+ }
+ }
+ return nil
+}
+
+// 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.RawExtension:
+ switch {
+ case item.Object != nil:
+ list[i] = item.Object
+ case item.Raw != nil:
+ // TODO: Set ContentEncoding and ContentType correctly.
+ list[i] = &runtime.Unknown{Raw: item.Raw}
+ default:
+ list[i] = nil
+ }
+ case runtime.Object:
+ list[i] = item
+ 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)
+ if dest.Type() == reflect.TypeOf(runtime.RawExtension{}) {
+ dest = dest.FieldByName("Object")
+ }
+
+ // check to see if you're directly assignable
+ if reflect.TypeOf(objects[i]).AssignableTo(dest.Type()) {
+ dest.Set(reflect.ValueOf(objects[i]))
+ continue
+ }
+
+ 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]: can't assign or convert %v into %v", i, src.Type(), dest.Type())
+ }
+ }
+ items.Set(slice)
+ return nil
+}