marshal.go

/*
Copyright 2017 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 util

import (
	"fmt"

	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/runtime/schema"
	"k8s.io/apimachinery/pkg/runtime/serializer"
	clientsetscheme "k8s.io/client-go/kubernetes/scheme"
)

// MarshalToYaml marshals an object into yaml.
func MarshalToYaml(obj runtime.Object, gv schema.GroupVersion) ([]byte, error) {
	return MarshalToYamlForCodecs(obj, gv, clientsetscheme.Codecs)
}

// MarshalToYamlForCodecs marshals an object into yaml using the specified codec
func MarshalToYamlForCodecs(obj runtime.Object, gv schema.GroupVersion, codecs serializer.CodecFactory) ([]byte, error) {
	mediaType := "application/yaml"
	info, ok := runtime.SerializerInfoForMediaType(codecs.SupportedMediaTypes(), mediaType)
	if !ok {
		return []byte{}, fmt.Errorf("unsupported media type %q", mediaType)
	}

	encoder := codecs.EncoderForVersion(info.Serializer, gv)
	return runtime.Encode(encoder, obj)
}

// UnmarshalFromYaml unmarshals yaml into an object.
func UnmarshalFromYaml(buffer []byte, gv schema.GroupVersion) (runtime.Object, error) {
	return UnmarshalFromYamlForCodecs(buffer, gv, clientsetscheme.Codecs)
}

// UnmarshalFromYamlForCodecs unmarshals yaml into an object using the specified codec
func UnmarshalFromYamlForCodecs(buffer []byte, gv schema.GroupVersion, codecs serializer.CodecFactory) (runtime.Object, error) {
	mediaType := "application/yaml"
	info, ok := runtime.SerializerInfoForMediaType(codecs.SupportedMediaTypes(), mediaType)
	if !ok {
		return nil, fmt.Errorf("unsupported media type %q", mediaType)
	}

	decoder := codecs.DecoderToVersion(info.Serializer, gv)
	return runtime.Decode(decoder, buffer)
}