1 files changed, 146 insertions, 0 deletions
diff --git a/vendor/k8s.io/apimachinery/pkg/runtime/negotiate.go b/vendor/k8s.io/apimachinery/pkg/runtime/negotiate.go
new file mode 100644
index 000000000..159b30120
--- /dev/null
+++ b/vendor/k8s.io/apimachinery/pkg/runtime/negotiate.go
@@ -0,0 +1,146 @@
+/*
+Copyright 2019 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 runtime
+
+import (
+	"fmt"
+
+	"k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+// NegotiateError is returned when a ClientNegotiator is unable to locate
+// a serializer for the requested operation.
+type NegotiateError struct {
+	ContentType string
+	Stream      bool
+}
+
+func (e NegotiateError) Error() string {
+	if e.Stream {
+		return fmt.Sprintf("no stream serializers registered for %s", e.ContentType)
+	}
+	return fmt.Sprintf("no serializers registered for %s", e.ContentType)
+}
+
+type clientNegotiator struct {
+	serializer     NegotiatedSerializer
+	encode, decode GroupVersioner
+}
+
+func (n *clientNegotiator) Encoder(contentType string, params map[string]string) (Encoder, error) {
+	// TODO: `pretty=1` is handled in NegotiateOutputMediaType, consider moving it to this method
+	// if client negotiators truly need to use it
+	mediaTypes := n.serializer.SupportedMediaTypes()
+	info, ok := SerializerInfoForMediaType(mediaTypes, contentType)
+	if !ok {
+		if len(contentType) != 0 || len(mediaTypes) == 0 {
+			return nil, NegotiateError{ContentType: contentType}
+		}
+		info = mediaTypes[0]
+	}
+	return n.serializer.EncoderForVersion(info.Serializer, n.encode), nil
+}
+
+func (n *clientNegotiator) Decoder(contentType string, params map[string]string) (Decoder, error) {
+	mediaTypes := n.serializer.SupportedMediaTypes()
+	info, ok := SerializerInfoForMediaType(mediaTypes, contentType)
+	if !ok {
+		if len(contentType) != 0 || len(mediaTypes) == 0 {
+			return nil, NegotiateError{ContentType: contentType}
+		}
+		info = mediaTypes[0]
+	}
+	return n.serializer.DecoderToVersion(info.Serializer, n.decode), nil
+}
+
+func (n *clientNegotiator) StreamDecoder(contentType string, params map[string]string) (Decoder, Serializer, Framer, error) {
+	mediaTypes := n.serializer.SupportedMediaTypes()
+	info, ok := SerializerInfoForMediaType(mediaTypes, contentType)
+	if !ok {
+		if len(contentType) != 0 || len(mediaTypes) == 0 {
+			return nil, nil, nil, NegotiateError{ContentType: contentType, Stream: true}
+		}
+		info = mediaTypes[0]
+	}
+	if info.StreamSerializer == nil {
+		return nil, nil, nil, NegotiateError{ContentType: info.MediaType, Stream: true}
+	}
+	return n.serializer.DecoderToVersion(info.Serializer, n.decode), info.StreamSerializer.Serializer, info.StreamSerializer.Framer, nil
+}
+
+// NewClientNegotiator will attempt to retrieve the appropriate encoder, decoder, or
+// stream decoder for a given content type. Does not perform any conversion, but will
+// encode the object to the desired group, version, and kind. Use when creating a client.
+func NewClientNegotiator(serializer NegotiatedSerializer, gv schema.GroupVersion) ClientNegotiator {
+	return &clientNegotiator{
+		serializer: serializer,
+		encode:     gv,
+	}
+}
+
+// NewInternalClientNegotiator applies the default client rules for connecting to a Kubernetes apiserver
+// where objects are converted to gv prior to sending and decoded to their internal representation prior
+// to retrieval.
+//
+// DEPRECATED: Internal clients are deprecated and will be removed in a future Kubernetes release.
+func NewInternalClientNegotiator(serializer NegotiatedSerializer, gv schema.GroupVersion) ClientNegotiator {
+	decode := schema.GroupVersions{
+		{
+			Group:   gv.Group,
+			Version: APIVersionInternal,
+		},
+		// always include the legacy group as a decoding target to handle non-error `Status` return types
+		{
+			Group:   "",
+			Version: APIVersionInternal,
+		},
+	}
+	return &clientNegotiator{
+		encode:     gv,
+		decode:     decode,
+		serializer: serializer,
+	}
+}
+
+// NewSimpleClientNegotiator will negotiate for a single serializer. This should only be used
+// for testing or when the caller is taking responsibility for setting the GVK on encoded objects.
+func NewSimpleClientNegotiator(info SerializerInfo, gv schema.GroupVersion) ClientNegotiator {
+	return &clientNegotiator{
+		serializer: &simpleNegotiatedSerializer{info: info},
+		encode:     gv,
+	}
+}
+
+type simpleNegotiatedSerializer struct {
+	info SerializerInfo
+}
+
+func NewSimpleNegotiatedSerializer(info SerializerInfo) NegotiatedSerializer {
+	return &simpleNegotiatedSerializer{info: info}
+}
+
+func (n *simpleNegotiatedSerializer) SupportedMediaTypes() []SerializerInfo {
+	return []SerializerInfo{n.info}
+}
+
+func (n *simpleNegotiatedSerializer) EncoderForVersion(e Encoder, _ GroupVersioner) Encoder {
+	return e
+}
+
+func (n *simpleNegotiatedSerializer) DecoderToVersion(d Decoder, _gv GroupVersioner) Decoder {
+	return d
+}