scheme.go

Documentation: k8s.io/client-go/dynamic

     1  /*
     2  Copyright 2018 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package dynamic
    18  
    19  import (
    20  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    21  	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
    22  	"k8s.io/apimachinery/pkg/runtime"
    23  	"k8s.io/apimachinery/pkg/runtime/schema"
    24  	"k8s.io/apimachinery/pkg/runtime/serializer"
    25  	"k8s.io/apimachinery/pkg/runtime/serializer/json"
    26  )
    27  
    28  var watchScheme = runtime.NewScheme()
    29  var basicScheme = runtime.NewScheme()
    30  var deleteScheme = runtime.NewScheme()
    31  var parameterScheme = runtime.NewScheme()
    32  var deleteOptionsCodec = serializer.NewCodecFactory(deleteScheme)
    33  var dynamicParameterCodec = runtime.NewParameterCodec(parameterScheme)
    34  
    35  var versionV1 = schema.GroupVersion{Version: "v1"}
    36  
    37  func init() {
    38  	metav1.AddToGroupVersion(watchScheme, versionV1)
    39  	metav1.AddToGroupVersion(basicScheme, versionV1)
    40  	metav1.AddToGroupVersion(parameterScheme, versionV1)
    41  	metav1.AddToGroupVersion(deleteScheme, versionV1)
    42  }
    43  
    44  // basicNegotiatedSerializer is used to handle discovery and error handling serialization
    45  type basicNegotiatedSerializer struct{}
    46  
    47  func (s basicNegotiatedSerializer) SupportedMediaTypes() []runtime.SerializerInfo {
    48  	return []runtime.SerializerInfo{
    49  		{
    50  			MediaType:        "application/json",
    51  			MediaTypeType:    "application",
    52  			MediaTypeSubType: "json",
    53  			EncodesAsText:    true,
    54  			Serializer:       json.NewSerializer(json.DefaultMetaFactory, unstructuredCreater{basicScheme}, unstructuredTyper{basicScheme}, false),
    55  			PrettySerializer: json.NewSerializer(json.DefaultMetaFactory, unstructuredCreater{basicScheme}, unstructuredTyper{basicScheme}, true),
    56  			StreamSerializer: &runtime.StreamSerializerInfo{
    57  				EncodesAsText: true,
    58  				Serializer:    json.NewSerializer(json.DefaultMetaFactory, basicScheme, basicScheme, false),
    59  				Framer:        json.Framer,
    60  			},
    61  		},
    62  	}
    63  }
    64  
    65  func (s basicNegotiatedSerializer) EncoderForVersion(encoder runtime.Encoder, gv runtime.GroupVersioner) runtime.Encoder {
    66  	return runtime.WithVersionEncoder{
    67  		Version:     gv,
    68  		Encoder:     encoder,
    69  		ObjectTyper: unstructuredTyper{basicScheme},
    70  	}
    71  }
    72  
    73  func (s basicNegotiatedSerializer) DecoderToVersion(decoder runtime.Decoder, gv runtime.GroupVersioner) runtime.Decoder {
    74  	return decoder
    75  }
    76  
    77  type unstructuredCreater struct {
    78  	nested runtime.ObjectCreater
    79  }
    80  
    81  func (c unstructuredCreater) New(kind schema.GroupVersionKind) (runtime.Object, error) {
    82  	out, err := c.nested.New(kind)
    83  	if err == nil {
    84  		return out, nil
    85  	}
    86  	out = &unstructured.Unstructured{}
    87  	out.GetObjectKind().SetGroupVersionKind(kind)
    88  	return out, nil
    89  }
    90  
    91  type unstructuredTyper struct {
    92  	nested runtime.ObjectTyper
    93  }
    94  
    95  func (t unstructuredTyper) ObjectKinds(obj runtime.Object) ([]schema.GroupVersionKind, bool, error) {
    96  	kinds, unversioned, err := t.nested.ObjectKinds(obj)
    97  	if err == nil {
    98  		return kinds, unversioned, nil
    99  	}
   100  	if _, ok := obj.(runtime.Unstructured); ok && !obj.GetObjectKind().GroupVersionKind().Empty() {
   101  		return []schema.GroupVersionKind{obj.GetObjectKind().GroupVersionKind()}, false, nil
   102  	}
   103  	return nil, false, err
   104  }
   105  
   106  func (t unstructuredTyper) Recognizes(gvk schema.GroupVersionKind) bool {
   107  	return true
   108  }
   109
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