12ba4e2452
Make clients opt in to decoding objects that are stored in the generic api.List object by invoking runtime.DecodeList() with a set of schemes. Makes it easier to handle unknown schema objects because decoding is in the control of the code. Add runtime.Unstructured, which is a simple in memory representation of an external object.
90 lines
2.5 KiB
Go
90 lines
2.5 KiB
Go
/*
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Copyright 2015 Google Inc. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package runtime
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import (
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"encoding/json"
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"fmt"
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"reflect"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/conversion"
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)
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// UnstructuredJSONScheme is capable of converting JSON data into the Unstructured
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// type, which can be used for generic access to objects without a predefined scheme.
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var UnstructuredJSONScheme ObjectDecoder = unstructuredJSONScheme{}
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type unstructuredJSONScheme struct{}
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// Recognizes returns true for any version or kind that is specified (internal
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// versions are specifically excluded).
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func (unstructuredJSONScheme) Recognizes(version, kind string) bool {
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return len(version) > 0 && len(kind) > 0
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}
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func (s unstructuredJSONScheme) Decode(data []byte) (Object, error) {
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unstruct := &Unstructured{}
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if err := s.DecodeInto(data, unstruct); err != nil {
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return nil, err
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}
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return unstruct, nil
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}
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func (unstructuredJSONScheme) DecodeInto(data []byte, obj Object) error {
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unstruct, ok := obj.(*Unstructured)
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if !ok {
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return fmt.Errorf("the unstructured JSON scheme does not recognize %v", reflect.TypeOf(obj))
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}
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m := make(map[string]interface{})
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if err := json.Unmarshal(data, &m); err != nil {
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return err
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}
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if v, ok := m["kind"]; ok {
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if s, ok := v.(string); ok {
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unstruct.Kind = s
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}
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}
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if v, ok := m["apiVersion"]; ok {
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if s, ok := v.(string); ok {
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unstruct.APIVersion = s
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}
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}
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if len(unstruct.APIVersion) == 0 {
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return conversion.NewMissingVersionErr(string(data))
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}
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if len(unstruct.Kind) == 0 {
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return conversion.NewMissingKindErr(string(data))
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}
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unstruct.Object = m
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return nil
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}
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func (unstructuredJSONScheme) DataVersionAndKind(data []byte) (version, kind string, err error) {
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obj := TypeMeta{}
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if err := json.Unmarshal(data, &obj); err != nil {
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return "", "", err
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}
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if len(obj.APIVersion) == 0 {
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return "", "", conversion.NewMissingVersionErr(string(data))
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}
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if len(obj.Kind) == 0 {
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return "", "", conversion.NewMissingKindErr(string(data))
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}
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return obj.APIVersion, obj.Kind, nil
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}
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