diff options
Diffstat (limited to 'kube2msb/src/kube2msb/vendor/k8s.io/kubernetes/pkg/runtime/unstructured.go')
-rw-r--r-- | kube2msb/src/kube2msb/vendor/k8s.io/kubernetes/pkg/runtime/unstructured.go | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/kube2msb/src/kube2msb/vendor/k8s.io/kubernetes/pkg/runtime/unstructured.go b/kube2msb/src/kube2msb/vendor/k8s.io/kubernetes/pkg/runtime/unstructured.go new file mode 100644 index 0000000..048e6dc --- /dev/null +++ b/kube2msb/src/kube2msb/vendor/k8s.io/kubernetes/pkg/runtime/unstructured.go @@ -0,0 +1,199 @@ +/* +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 runtime + +import ( + gojson "encoding/json" + "errors" + "fmt" + "io" + "strings" + + "k8s.io/kubernetes/pkg/api/unversioned" + "k8s.io/kubernetes/pkg/util/json" +) + +// UnstructuredJSONScheme is capable of converting JSON data into the Unstructured +// type, which can be used for generic access to objects without a predefined scheme. +// TODO: move into serializer/json. +var UnstructuredJSONScheme Codec = unstructuredJSONScheme{} + +type unstructuredJSONScheme struct{} + +func (s unstructuredJSONScheme) Decode(data []byte, _ *unversioned.GroupVersionKind, obj Object) (Object, *unversioned.GroupVersionKind, error) { + var err error + if obj != nil { + err = s.decodeInto(data, obj) + } else { + obj, err = s.decode(data) + } + + if err != nil { + return nil, nil, err + } + + gvk := obj.GetObjectKind().GroupVersionKind() + if len(gvk.Kind) == 0 { + return nil, &gvk, NewMissingKindErr(string(data)) + } + + return obj, &gvk, nil +} + +func (unstructuredJSONScheme) Encode(obj Object, w io.Writer) error { + switch t := obj.(type) { + case *Unstructured: + return json.NewEncoder(w).Encode(t.Object) + case *UnstructuredList: + items := make([]map[string]interface{}, 0, len(t.Items)) + for _, i := range t.Items { + items = append(items, i.Object) + } + t.Object["items"] = items + defer func() { delete(t.Object, "items") }() + return json.NewEncoder(w).Encode(t.Object) + case *Unknown: + // TODO: Unstructured needs to deal with ContentType. + _, err := w.Write(t.Raw) + return err + default: + return json.NewEncoder(w).Encode(t) + } +} + +func (s unstructuredJSONScheme) decode(data []byte) (Object, error) { + type detector struct { + Items gojson.RawMessage + } + var det detector + if err := json.Unmarshal(data, &det); err != nil { + return nil, err + } + + if det.Items != nil { + list := &UnstructuredList{} + err := s.decodeToList(data, list) + return list, err + } + + // No Items field, so it wasn't a list. + unstruct := &Unstructured{} + err := s.decodeToUnstructured(data, unstruct) + return unstruct, err +} +func (s unstructuredJSONScheme) decodeInto(data []byte, obj Object) error { + switch x := obj.(type) { + case *Unstructured: + return s.decodeToUnstructured(data, x) + case *UnstructuredList: + return s.decodeToList(data, x) + case *VersionedObjects: + u := new(Unstructured) + err := s.decodeToUnstructured(data, u) + if err == nil { + x.Objects = []Object{u} + } + return err + default: + return json.Unmarshal(data, x) + } +} + +func (unstructuredJSONScheme) decodeToUnstructured(data []byte, unstruct *Unstructured) error { + m := make(map[string]interface{}) + if err := json.Unmarshal(data, &m); err != nil { + return err + } + + unstruct.Object = m + + return nil +} + +func (s unstructuredJSONScheme) decodeToList(data []byte, list *UnstructuredList) error { + type decodeList struct { + Items []gojson.RawMessage + } + + var dList decodeList + if err := json.Unmarshal(data, &dList); err != nil { + return err + } + + if err := json.Unmarshal(data, &list.Object); err != nil { + return err + } + + // For typed lists, e.g., a PodList, API server doesn't set each item's + // APIVersion and Kind. We need to set it. + listAPIVersion := list.GetAPIVersion() + listKind := list.GetKind() + itemKind := strings.TrimSuffix(listKind, "List") + + delete(list.Object, "items") + list.Items = nil + for _, i := range dList.Items { + unstruct := &Unstructured{} + if err := s.decodeToUnstructured([]byte(i), unstruct); err != nil { + return err + } + // This is hacky. Set the item's Kind and APIVersion to those inferred + // from the List. + if len(unstruct.GetKind()) == 0 && len(unstruct.GetAPIVersion()) == 0 { + unstruct.SetKind(itemKind) + unstruct.SetAPIVersion(listAPIVersion) + } + list.Items = append(list.Items, unstruct) + } + return nil +} + +// UnstructuredObjectConverter is an ObjectConverter for use with +// Unstructured objects. Since it has no schema or type information, +// it will only succeed for no-op conversions. This is provided as a +// sane implementation for APIs that require an object converter. +type UnstructuredObjectConverter struct{} + +func (UnstructuredObjectConverter) Convert(in, out interface{}) error { + unstructIn, ok := in.(*Unstructured) + if !ok { + return fmt.Errorf("input type %T in not valid for unstructured conversion", in) + } + + unstructOut, ok := out.(*Unstructured) + if !ok { + return fmt.Errorf("output type %T in not valid for unstructured conversion", out) + } + + // maybe deep copy the map? It is documented in the + // ObjectConverter interface that this function is not + // guaranteeed to not mutate the input. Or maybe set the input + // object to nil. + unstructOut.Object = unstructIn.Object + return nil +} + +func (UnstructuredObjectConverter) ConvertToVersion(in Object, outVersion unversioned.GroupVersion) (Object, error) { + if gvk := in.GetObjectKind().GroupVersionKind(); gvk.GroupVersion() != outVersion { + return nil, errors.New("unstructured converter cannot convert versions") + } + return in, nil +} + +func (UnstructuredObjectConverter) ConvertFieldLabel(version, kind, label, value string) (string, string, error) { + return "", "", errors.New("unstructured cannot convert field labels") +} |