63 lines
2.2 KiB
Go
63 lines
2.2 KiB
Go
/*
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Copyright 2014 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 json
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import (
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"encoding/json"
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"fmt"
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"k8s.io/apimachinery/pkg/runtime/schema"
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)
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// MetaFactory is used to store and retrieve the version and kind
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// information for JSON objects in a serializer.
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type MetaFactory interface {
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// Interpret should return the version and kind of the wire-format of
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// the object.
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Interpret(data []byte) (*schema.GroupVersionKind, error)
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}
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// DefaultMetaFactory is a default factory for versioning objects in JSON. The object
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// in memory and in the default JSON serialization will use the "kind" and "apiVersion"
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// fields.
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var DefaultMetaFactory = SimpleMetaFactory{}
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// SimpleMetaFactory provides default methods for retrieving the type and version of objects
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// that are identified with an "apiVersion" and "kind" fields in their JSON
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// serialization. It may be parameterized with the names of the fields in memory, or an
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// optional list of base structs to search for those fields in memory.
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type SimpleMetaFactory struct {
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}
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// Interpret will return the APIVersion and Kind of the JSON wire-format
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// encoding of an object, or an error.
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func (SimpleMetaFactory) Interpret(data []byte) (*schema.GroupVersionKind, error) {
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findKind := struct {
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// +optional
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APIVersion string `json:"apiVersion,omitempty"`
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// +optional
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Kind string `json:"kind,omitempty"`
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}{}
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if err := json.Unmarshal(data, &findKind); err != nil {
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return nil, fmt.Errorf("couldn't get version/kind; json parse error: %v", err)
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}
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gv, err := schema.ParseGroupVersion(findKind.APIVersion)
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if err != nil {
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return nil, err
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}
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return &schema.GroupVersionKind{Group: gv.Group, Version: gv.Version, Kind: findKind.Kind}, nil
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}
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