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57 lines
1.8 KiB
Go
57 lines
1.8 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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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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"fmt"
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"reflect"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/util/json"
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)
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// CheckCodec makes sure that the codec can encode objects like internalType,
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// decode all of the external types listed, and also decode them into the given
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// object. (Will modify internalObject.) (Assumes JSON serialization.)
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// TODO: verify that the correct external version is chosen on encode...
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func CheckCodec(c Codec, internalType Object, externalTypes ...schema.GroupVersionKind) error {
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if _, err := Encode(c, internalType); err != nil {
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return fmt.Errorf("internal type not encodable: %v", err)
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}
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for _, et := range externalTypes {
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typeMeta := TypeMeta{
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Kind: et.Kind,
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APIVersion: et.GroupVersion().String(),
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}
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exBytes, err := json.Marshal(&typeMeta)
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if err != nil {
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return err
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}
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obj, err := Decode(c, exBytes)
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if err != nil {
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return fmt.Errorf("external type %s not interpretable: %v", et, err)
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}
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if reflect.TypeOf(obj) != reflect.TypeOf(internalType) {
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return fmt.Errorf("decode of external type %s produced: %#v", et, obj)
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}
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if err = DecodeInto(c, exBytes, internalType); err != nil {
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return fmt.Errorf("external type %s not convertible to internal type: %v", et, err)
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}
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}
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return nil
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}
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