Vendor dependencies

vendor/k8s.io/kubernetes/pkg/runtime/serializer/recognizer/recognizer.go

@@ -0,0 +1,79 @@
+/*
+Copyright 2014 The Kubernetes Authors All rights reserved.
+
+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 recognizer
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+
+	"k8s.io/kubernetes/pkg/api/unversioned"
+	"k8s.io/kubernetes/pkg/runtime"
+)
+
+type RecognizingDecoder interface {
+	runtime.Decoder
+	RecognizesData(peek io.Reader) (bool, error)
+}
+
+func NewDecoder(decoders ...runtime.Decoder) runtime.Decoder {
+	recognizing, blind := []RecognizingDecoder{}, []runtime.Decoder{}
+	for _, d := range decoders {
+		if r, ok := d.(RecognizingDecoder); ok {
+			recognizing = append(recognizing, r)
+		} else {
+			blind = append(blind, d)
+		}
+	}
+	return &decoder{
+		recognizing: recognizing,
+		blind:       blind,
+	}
+}
+
+type decoder struct {
+	recognizing []RecognizingDecoder
+	blind       []runtime.Decoder
+}
+
+func (d *decoder) Decode(data []byte, gvk *unversioned.GroupVersionKind, into runtime.Object) (runtime.Object, *unversioned.GroupVersionKind, error) {
+	var lastErr error
+	for _, r := range d.recognizing {
+		buf := bytes.NewBuffer(data)
+		ok, err := r.RecognizesData(buf)
+		if err != nil {
+			lastErr = err
+			continue
+		}
+		if !ok {
+			continue
+		}
+		return r.Decode(data, gvk, into)
+	}
+	for _, d := range d.blind {
+		out, actual, err := d.Decode(data, gvk, into)
+		if err != nil {
+			lastErr = err
+			continue
+		}
+		return out, actual, nil
+	}
+	if lastErr == nil {
+		lastErr = fmt.Errorf("no serialization format matched the provided data")
+	}
+	return nil, nil, lastErr
+}