Vendor in lots of kubernetes stuff to shrink image size

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

Closes: #554
Approved by: mheon

1 files changed, 793 insertions, 0 deletions

diff --git a/vendor/k8s.io/apimachinery/pkg/runtime/converter.go b/vendor/k8s.io/apimachinery/pkg/runtime/converter.go
new file mode 100644
index 000000000..f6f7c10de
--- /dev/null
+++ b/vendor/k8s.io/apimachinery/pkg/runtime/converter.go
@@ -0,0 +1,793 @@
+/*
+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 runtime
+
+import (
+	"bytes"
+	encodingjson "encoding/json"
+	"fmt"
+	"math"
+	"os"
+	"reflect"
+	"strconv"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"k8s.io/apimachinery/pkg/conversion"
+	"k8s.io/apimachinery/pkg/util/json"
+	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
+
+	"github.com/golang/glog"
+)
+
+// UnstructuredConverter is an interface for converting between interface{}
+// and map[string]interface representation.
+type UnstructuredConverter interface {
+	ToUnstructured(obj interface{}) (map[string]interface{}, error)
+	FromUnstructured(u map[string]interface{}, obj interface{}) error
+}
+
+type structField struct {
+	structType reflect.Type
+	field      int
+}
+
+type fieldInfo struct {
+	name      string
+	nameValue reflect.Value
+	omitempty bool
+}
+
+type fieldsCacheMap map[structField]*fieldInfo
+
+type fieldsCache struct {
+	sync.Mutex
+	value atomic.Value
+}
+
+func newFieldsCache() *fieldsCache {
+	cache := &fieldsCache{}
+	cache.value.Store(make(fieldsCacheMap))
+	return cache
+}
+
+var (
+	marshalerType          = reflect.TypeOf(new(encodingjson.Marshaler)).Elem()
+	unmarshalerType        = reflect.TypeOf(new(encodingjson.Unmarshaler)).Elem()
+	mapStringInterfaceType = reflect.TypeOf(map[string]interface{}{})
+	stringType             = reflect.TypeOf(string(""))
+	int64Type              = reflect.TypeOf(int64(0))
+	uint64Type             = reflect.TypeOf(uint64(0))
+	float64Type            = reflect.TypeOf(float64(0))
+	boolType               = reflect.TypeOf(bool(false))
+	fieldCache             = newFieldsCache()
+
+	// DefaultUnstructuredConverter performs unstructured to Go typed object conversions.
+	DefaultUnstructuredConverter = &unstructuredConverter{
+		mismatchDetection: parseBool(os.Getenv("KUBE_PATCH_CONVERSION_DETECTOR")),
+		comparison: conversion.EqualitiesOrDie(
+			func(a, b time.Time) bool {
+				return a.UTC() == b.UTC()
+			},
+		),
+	}
+)
+
+func parseBool(key string) bool {
+	if len(key) == 0 {
+		return false
+	}
+	value, err := strconv.ParseBool(key)
+	if err != nil {
+		utilruntime.HandleError(fmt.Errorf("Couldn't parse '%s' as bool for unstructured mismatch detection", key))
+	}
+	return value
+}
+
+// unstructuredConverter knows how to convert between interface{} and
+// Unstructured in both ways.
+type unstructuredConverter struct {
+	// If true, we will be additionally running conversion via json
+	// to ensure that the result is true.
+	// This is supposed to be set only in tests.
+	mismatchDetection bool
+	// comparison is the default test logic used to compare
+	comparison conversion.Equalities
+}
+
+// NewTestUnstructuredConverter creates an UnstructuredConverter that accepts JSON typed maps and translates them
+// to Go types via reflection. It performs mismatch detection automatically and is intended for use by external
+// test tools. Use DefaultUnstructuredConverter if you do not explicitly need mismatch detection.
+func NewTestUnstructuredConverter(comparison conversion.Equalities) UnstructuredConverter {
+	return &unstructuredConverter{
+		mismatchDetection: true,
+		comparison:        comparison,
+	}
+}
+
+// FromUnstructured converts an object from map[string]interface{} representation into a concrete type.
+// It uses encoding/json/Unmarshaler if object implements it or reflection if not.
+func (c *unstructuredConverter) FromUnstructured(u map[string]interface{}, obj interface{}) error {
+	t := reflect.TypeOf(obj)
+	value := reflect.ValueOf(obj)
+	if t.Kind() != reflect.Ptr || value.IsNil() {
+		return fmt.Errorf("FromUnstructured requires a non-nil pointer to an object, got %v", t)
+	}
+	err := fromUnstructured(reflect.ValueOf(u), value.Elem())
+	if c.mismatchDetection {
+		newObj := reflect.New(t.Elem()).Interface()
+		newErr := fromUnstructuredViaJSON(u, newObj)
+		if (err != nil) != (newErr != nil) {
+			glog.Fatalf("FromUnstructured unexpected error for %v: error: %v", u, err)
+		}
+		if err == nil && !c.comparison.DeepEqual(obj, newObj) {
+			glog.Fatalf("FromUnstructured mismatch\nobj1: %#v\nobj2: %#v", obj, newObj)
+		}
+	}
+	return err
+}
+
+func fromUnstructuredViaJSON(u map[string]interface{}, obj interface{}) error {
+	data, err := json.Marshal(u)
+	if err != nil {
+		return err
+	}
+	return json.Unmarshal(data, obj)
+}
+
+func fromUnstructured(sv, dv reflect.Value) error {
+	sv = unwrapInterface(sv)
+	if !sv.IsValid() {
+		dv.Set(reflect.Zero(dv.Type()))
+		return nil
+	}
+	st, dt := sv.Type(), dv.Type()
+
+	switch dt.Kind() {
+	case reflect.Map, reflect.Slice, reflect.Ptr, reflect.Struct, reflect.Interface:
+		// Those require non-trivial conversion.
+	default:
+		// This should handle all simple types.
+		if st.AssignableTo(dt) {
+			dv.Set(sv)
+			return nil
+		}
+		// We cannot simply use "ConvertibleTo", as JSON doesn't support conversions
+		// between those four groups: bools, integers, floats and string. We need to
+		// do the same.
+		if st.ConvertibleTo(dt) {
+			switch st.Kind() {
+			case reflect.String:
+				switch dt.Kind() {
+				case reflect.String:
+					dv.Set(sv.Convert(dt))
+					return nil
+				}
+			case reflect.Bool:
+				switch dt.Kind() {
+				case reflect.Bool:
+					dv.Set(sv.Convert(dt))
+					return nil
+				}
+			case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
+				reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+				switch dt.Kind() {
+				case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
+					reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+					dv.Set(sv.Convert(dt))
+					return nil
+				}
+			case reflect.Float32, reflect.Float64:
+				switch dt.Kind() {
+				case reflect.Float32, reflect.Float64:
+					dv.Set(sv.Convert(dt))
+					return nil
+				}
+				if sv.Float() == math.Trunc(sv.Float()) {
+					dv.Set(sv.Convert(dt))
+					return nil
+				}
+			}
+			return fmt.Errorf("cannot convert %s to %s", st.String(), dt.String())
+		}
+	}
+
+	// Check if the object has a custom JSON marshaller/unmarshaller.
+	if reflect.PtrTo(dt).Implements(unmarshalerType) {
+		data, err := json.Marshal(sv.Interface())
+		if err != nil {
+			return fmt.Errorf("error encoding %s to json: %v", st.String(), err)
+		}
+		unmarshaler := dv.Addr().Interface().(encodingjson.Unmarshaler)
+		return unmarshaler.UnmarshalJSON(data)
+	}
+
+	switch dt.Kind() {
+	case reflect.Map:
+		return mapFromUnstructured(sv, dv)
+	case reflect.Slice:
+		return sliceFromUnstructured(sv, dv)
+	case reflect.Ptr:
+		return pointerFromUnstructured(sv, dv)
+	case reflect.Struct:
+		return structFromUnstructured(sv, dv)
+	case reflect.Interface:
+		return interfaceFromUnstructured(sv, dv)
+	default:
+		return fmt.Errorf("unrecognized type: %v", dt.Kind())
+	}
+}
+
+func fieldInfoFromField(structType reflect.Type, field int) *fieldInfo {
+	fieldCacheMap := fieldCache.value.Load().(fieldsCacheMap)
+	if info, ok := fieldCacheMap[structField{structType, field}]; ok {
+		return info
+	}
+
+	// Cache miss - we need to compute the field name.
+	info := &fieldInfo{}
+	typeField := structType.Field(field)
+	jsonTag := typeField.Tag.Get("json")
+	if len(jsonTag) == 0 {
+		// Make the first character lowercase.
+		if typeField.Name == "" {
+			info.name = typeField.Name
+		} else {
+			info.name = strings.ToLower(typeField.Name[:1]) + typeField.Name[1:]
+		}
+	} else {
+		items := strings.Split(jsonTag, ",")
+		info.name = items[0]
+		for i := range items {
+			if items[i] == "omitempty" {
+				info.omitempty = true
+			}
+		}
+	}
+	info.nameValue = reflect.ValueOf(info.name)
+
+	fieldCache.Lock()
+	defer fieldCache.Unlock()
+	fieldCacheMap = fieldCache.value.Load().(fieldsCacheMap)
+	newFieldCacheMap := make(fieldsCacheMap)
+	for k, v := range fieldCacheMap {
+		newFieldCacheMap[k] = v
+	}
+	newFieldCacheMap[structField{structType, field}] = info
+	fieldCache.value.Store(newFieldCacheMap)
+	return info
+}
+
+func unwrapInterface(v reflect.Value) reflect.Value {
+	for v.Kind() == reflect.Interface {
+		v = v.Elem()
+	}
+	return v
+}
+
+func mapFromUnstructured(sv, dv reflect.Value) error {
+	st, dt := sv.Type(), dv.Type()
+	if st.Kind() != reflect.Map {
+		return fmt.Errorf("cannot restore map from %v", st.Kind())
+	}
+
+	if !st.Key().AssignableTo(dt.Key()) && !st.Key().ConvertibleTo(dt.Key()) {
+		return fmt.Errorf("cannot copy map with non-assignable keys: %v %v", st.Key(), dt.Key())
+	}
+
+	if sv.IsNil() {
+		dv.Set(reflect.Zero(dt))
+		return nil
+	}
+	dv.Set(reflect.MakeMap(dt))
+	for _, key := range sv.MapKeys() {
+		value := reflect.New(dt.Elem()).Elem()
+		if val := unwrapInterface(sv.MapIndex(key)); val.IsValid() {
+			if err := fromUnstructured(val, value); err != nil {
+				return err
+			}
+		} else {
+			value.Set(reflect.Zero(dt.Elem()))
+		}
+		if st.Key().AssignableTo(dt.Key()) {
+			dv.SetMapIndex(key, value)
+		} else {
+			dv.SetMapIndex(key.Convert(dt.Key()), value)
+		}
+	}
+	return nil
+}
+
+func sliceFromUnstructured(sv, dv reflect.Value) error {
+	st, dt := sv.Type(), dv.Type()
+	if st.Kind() == reflect.String && dt.Elem().Kind() == reflect.Uint8 {
+		// We store original []byte representation as string.
+		// This conversion is allowed, but we need to be careful about
+		// marshaling data appropriately.
+		if len(sv.Interface().(string)) > 0 {
+			marshalled, err := json.Marshal(sv.Interface())
+			if err != nil {
+				return fmt.Errorf("error encoding %s to json: %v", st, err)
+			}
+			// TODO: Is this Unmarshal needed?
+			var data []byte
+			err = json.Unmarshal(marshalled, &data)
+			if err != nil {
+				return fmt.Errorf("error decoding from json: %v", err)
+			}
+			dv.SetBytes(data)
+		} else {
+			dv.Set(reflect.Zero(dt))
+		}
+		return nil
+	}
+	if st.Kind() != reflect.Slice {
+		return fmt.Errorf("cannot restore slice from %v", st.Kind())
+	}
+
+	if sv.IsNil() {
+		dv.Set(reflect.Zero(dt))
+		return nil
+	}
+	dv.Set(reflect.MakeSlice(dt, sv.Len(), sv.Cap()))
+	for i := 0; i < sv.Len(); i++ {
+		if err := fromUnstructured(sv.Index(i), dv.Index(i)); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func pointerFromUnstructured(sv, dv reflect.Value) error {
+	st, dt := sv.Type(), dv.Type()
+
+	if st.Kind() == reflect.Ptr && sv.IsNil() {
+		dv.Set(reflect.Zero(dt))
+		return nil
+	}
+	dv.Set(reflect.New(dt.Elem()))
+	switch st.Kind() {
+	case reflect.Ptr, reflect.Interface:
+		return fromUnstructured(sv.Elem(), dv.Elem())
+	default:
+		return fromUnstructured(sv, dv.Elem())
+	}
+}
+
+func structFromUnstructured(sv, dv reflect.Value) error {
+	st, dt := sv.Type(), dv.Type()
+	if st.Kind() != reflect.Map {
+		return fmt.Errorf("cannot restore struct from: %v", st.Kind())
+	}
+
+	for i := 0; i < dt.NumField(); i++ {
+		fieldInfo := fieldInfoFromField(dt, i)
+		fv := dv.Field(i)
+
+		if len(fieldInfo.name) == 0 {
+			// This field is inlined.
+			if err := fromUnstructured(sv, fv); err != nil {
+				return err
+			}
+		} else {
+			value := unwrapInterface(sv.MapIndex(fieldInfo.nameValue))
+			if value.IsValid() {
+				if err := fromUnstructured(value, fv); err != nil {
+					return err
+				}
+			} else {
+				fv.Set(reflect.Zero(fv.Type()))
+			}
+		}
+	}
+	return nil
+}
+
+func interfaceFromUnstructured(sv, dv reflect.Value) error {
+	// TODO: Is this conversion safe?
+	dv.Set(sv)
+	return nil
+}
+
+// ToUnstructured converts an object into map[string]interface{} representation.
+// It uses encoding/json/Marshaler if object implements it or reflection if not.
+func (c *unstructuredConverter) ToUnstructured(obj interface{}) (map[string]interface{}, error) {
+	var u map[string]interface{}
+	var err error
+	if unstr, ok := obj.(Unstructured); ok {
+		// UnstructuredContent() mutates the object so we need to make a copy first
+		u = unstr.DeepCopyObject().(Unstructured).UnstructuredContent()
+	} else {
+		t := reflect.TypeOf(obj)
+		value := reflect.ValueOf(obj)
+		if t.Kind() != reflect.Ptr || value.IsNil() {
+			return nil, fmt.Errorf("ToUnstructured requires a non-nil pointer to an object, got %v", t)
+		}
+		u = map[string]interface{}{}
+		err = toUnstructured(value.Elem(), reflect.ValueOf(&u).Elem())
+	}
+	if c.mismatchDetection {
+		newUnstr := map[string]interface{}{}
+		newErr := toUnstructuredViaJSON(obj, &newUnstr)
+		if (err != nil) != (newErr != nil) {
+			glog.Fatalf("ToUnstructured unexpected error for %v: error: %v; newErr: %v", obj, err, newErr)
+		}
+		if err == nil && !c.comparison.DeepEqual(u, newUnstr) {
+			glog.Fatalf("ToUnstructured mismatch\nobj1: %#v\nobj2: %#v", u, newUnstr)
+		}
+	}
+	if err != nil {
+		return nil, err
+	}
+	return u, nil
+}
+
+// DeepCopyJSON deep copies the passed value, assuming it is a valid JSON representation i.e. only contains
+// types produced by json.Unmarshal().
+func DeepCopyJSON(x map[string]interface{}) map[string]interface{} {
+	return DeepCopyJSONValue(x).(map[string]interface{})
+}
+
+// DeepCopyJSONValue deep copies the passed value, assuming it is a valid JSON representation i.e. only contains
+// types produced by json.Unmarshal().
+func DeepCopyJSONValue(x interface{}) interface{} {
+	switch x := x.(type) {
+	case map[string]interface{}:
+		clone := make(map[string]interface{}, len(x))
+		for k, v := range x {
+			clone[k] = DeepCopyJSONValue(v)
+		}
+		return clone
+	case []interface{}:
+		clone := make([]interface{}, len(x))
+		for i, v := range x {
+			clone[i] = DeepCopyJSONValue(v)
+		}
+		return clone
+	case string, int64, bool, float64, nil, encodingjson.Number:
+		return x
+	default:
+		panic(fmt.Errorf("cannot deep copy %T", x))
+	}
+}
+
+func toUnstructuredViaJSON(obj interface{}, u *map[string]interface{}) error {
+	data, err := json.Marshal(obj)
+	if err != nil {
+		return err
+	}
+	return json.Unmarshal(data, u)
+}
+
+var (
+	nullBytes  = []byte("null")
+	trueBytes  = []byte("true")
+	falseBytes = []byte("false")
+)
+
+func getMarshaler(v reflect.Value) (encodingjson.Marshaler, bool) {
+	// Check value receivers if v is not a pointer and pointer receivers if v is a pointer
+	if v.Type().Implements(marshalerType) {
+		return v.Interface().(encodingjson.Marshaler), true
+	}
+	// Check pointer receivers if v is not a pointer
+	if v.Kind() != reflect.Ptr && v.CanAddr() {
+		v = v.Addr()
+		if v.Type().Implements(marshalerType) {
+			return v.Interface().(encodingjson.Marshaler), true
+		}
+	}
+	return nil, false
+}
+
+func toUnstructured(sv, dv reflect.Value) error {
+	// Check if the object has a custom JSON marshaller/unmarshaller.
+	if marshaler, ok := getMarshaler(sv); ok {
+		if sv.Kind() == reflect.Ptr && sv.IsNil() {
+			// We're done - we don't need to store anything.
+			return nil
+		}
+
+		data, err := marshaler.MarshalJSON()
+		if err != nil {
+			return err
+		}
+		switch {
+		case len(data) == 0:
+			return fmt.Errorf("error decoding from json: empty value")
+
+		case bytes.Equal(data, nullBytes):
+			// We're done - we don't need to store anything.
+
+		case bytes.Equal(data, trueBytes):
+			dv.Set(reflect.ValueOf(true))
+
+		case bytes.Equal(data, falseBytes):
+			dv.Set(reflect.ValueOf(false))
+
+		case data[0] == '"':
+			var result string
+			err := json.Unmarshal(data, &result)
+			if err != nil {
+				return fmt.Errorf("error decoding string from json: %v", err)
+			}
+			dv.Set(reflect.ValueOf(result))
+
+		case data[0] == '{':
+			result := make(map[string]interface{})
+			err := json.Unmarshal(data, &result)
+			if err != nil {
+				return fmt.Errorf("error decoding object from json: %v", err)
+			}
+			dv.Set(reflect.ValueOf(result))
+
+		case data[0] == '[':
+			result := make([]interface{}, 0)
+			err := json.Unmarshal(data, &result)
+			if err != nil {
+				return fmt.Errorf("error decoding array from json: %v", err)
+			}
+			dv.Set(reflect.ValueOf(result))
+
+		default:
+			var (
+				resultInt   int64
+				resultFloat float64
+				err         error
+			)
+			if err = json.Unmarshal(data, &resultInt); err == nil {
+				dv.Set(reflect.ValueOf(resultInt))
+			} else if err = json.Unmarshal(data, &resultFloat); err == nil {
+				dv.Set(reflect.ValueOf(resultFloat))
+			} else {
+				return fmt.Errorf("error decoding number from json: %v", err)
+			}
+		}
+
+		return nil
+	}
+
+	st, dt := sv.Type(), dv.Type()
+	switch st.Kind() {
+	case reflect.String:
+		if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
+			dv.Set(reflect.New(stringType))
+		}
+		dv.Set(reflect.ValueOf(sv.String()))
+		return nil
+	case reflect.Bool:
+		if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
+			dv.Set(reflect.New(boolType))
+		}
+		dv.Set(reflect.ValueOf(sv.Bool()))
+		return nil
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
+			dv.Set(reflect.New(int64Type))
+		}
+		dv.Set(reflect.ValueOf(sv.Int()))
+		return nil
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
+			dv.Set(reflect.New(uint64Type))
+		}
+		dv.Set(reflect.ValueOf(sv.Uint()))
+		return nil
+	case reflect.Float32, reflect.Float64:
+		if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
+			dv.Set(reflect.New(float64Type))
+		}
+		dv.Set(reflect.ValueOf(sv.Float()))
+		return nil
+	case reflect.Map:
+		return mapToUnstructured(sv, dv)
+	case reflect.Slice:
+		return sliceToUnstructured(sv, dv)
+	case reflect.Ptr:
+		return pointerToUnstructured(sv, dv)
+	case reflect.Struct:
+		return structToUnstructured(sv, dv)
+	case reflect.Interface:
+		return interfaceToUnstructured(sv, dv)
+	default:
+		return fmt.Errorf("unrecognized type: %v", st.Kind())
+	}
+}
+
+func mapToUnstructured(sv, dv reflect.Value) error {
+	st, dt := sv.Type(), dv.Type()
+	if sv.IsNil() {
+		dv.Set(reflect.Zero(dt))
+		return nil
+	}
+	if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
+		if st.Key().Kind() == reflect.String {
+			switch st.Elem().Kind() {
+			// TODO It should be possible to reuse the slice for primitive types.
+			// However, it is panicing in the following form.
+			// case reflect.String, reflect.Bool,
+			// 	reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
+			// 	reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+			// 	sv.Set(sv)
+			// 	return nil
+			default:
+				// We need to do a proper conversion.
+			}
+		}
+		dv.Set(reflect.MakeMap(mapStringInterfaceType))
+		dv = dv.Elem()
+		dt = dv.Type()
+	}
+	if dt.Kind() != reflect.Map {
+		return fmt.Errorf("cannot convert struct to: %v", dt.Kind())
+	}
+
+	if !st.Key().AssignableTo(dt.Key()) && !st.Key().ConvertibleTo(dt.Key()) {
+		return fmt.Errorf("cannot copy map with non-assignable keys: %v %v", st.Key(), dt.Key())
+	}
+
+	for _, key := range sv.MapKeys() {
+		value := reflect.New(dt.Elem()).Elem()
+		if err := toUnstructured(sv.MapIndex(key), value); err != nil {
+			return err
+		}
+		if st.Key().AssignableTo(dt.Key()) {
+			dv.SetMapIndex(key, value)
+		} else {
+			dv.SetMapIndex(key.Convert(dt.Key()), value)
+		}
+	}
+	return nil
+}
+
+func sliceToUnstructured(sv, dv reflect.Value) error {
+	st, dt := sv.Type(), dv.Type()
+	if sv.IsNil() {
+		dv.Set(reflect.Zero(dt))
+		return nil
+	}
+	if st.Elem().Kind() == reflect.Uint8 {
+		dv.Set(reflect.New(stringType))
+		data, err := json.Marshal(sv.Bytes())
+		if err != nil {
+			return err
+		}
+		var result string
+		if err = json.Unmarshal(data, &result); err != nil {
+			return err
+		}
+		dv.Set(reflect.ValueOf(result))
+		return nil
+	}
+	if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
+		switch st.Elem().Kind() {
+		// TODO It should be possible to reuse the slice for primitive types.
+		// However, it is panicing in the following form.
+		// case reflect.String, reflect.Bool,
+		// 	reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
+		// 	reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		// 	sv.Set(sv)
+		// 	return nil
+		default:
+			// We need to do a proper conversion.
+			dv.Set(reflect.MakeSlice(reflect.SliceOf(dt), sv.Len(), sv.Cap()))
+			dv = dv.Elem()
+			dt = dv.Type()
+		}
+	}
+	if dt.Kind() != reflect.Slice {
+		return fmt.Errorf("cannot convert slice to: %v", dt.Kind())
+	}
+	for i := 0; i < sv.Len(); i++ {
+		if err := toUnstructured(sv.Index(i), dv.Index(i)); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func pointerToUnstructured(sv, dv reflect.Value) error {
+	if sv.IsNil() {
+		// We're done - we don't need to store anything.
+		return nil
+	}
+	return toUnstructured(sv.Elem(), dv)
+}
+
+func isZero(v reflect.Value) bool {
+	switch v.Kind() {
+	case reflect.Array, reflect.String:
+		return v.Len() == 0
+	case reflect.Bool:
+		return !v.Bool()
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return v.Int() == 0
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		return v.Uint() == 0
+	case reflect.Float32, reflect.Float64:
+		return v.Float() == 0
+	case reflect.Map, reflect.Slice:
+		// TODO: It seems that 0-len maps are ignored in it.
+		return v.IsNil() || v.Len() == 0
+	case reflect.Ptr, reflect.Interface:
+		return v.IsNil()
+	}
+	return false
+}
+
+func structToUnstructured(sv, dv reflect.Value) error {
+	st, dt := sv.Type(), dv.Type()
+	if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
+		dv.Set(reflect.MakeMap(mapStringInterfaceType))
+		dv = dv.Elem()
+		dt = dv.Type()
+	}
+	if dt.Kind() != reflect.Map {
+		return fmt.Errorf("cannot convert struct to: %v", dt.Kind())
+	}
+	realMap := dv.Interface().(map[string]interface{})
+
+	for i := 0; i < st.NumField(); i++ {
+		fieldInfo := fieldInfoFromField(st, i)
+		fv := sv.Field(i)
+
+		if fieldInfo.name == "-" {
+			// This field should be skipped.
+			continue
+		}
+		if fieldInfo.omitempty && isZero(fv) {
+			// omitempty fields should be ignored.
+			continue
+		}
+		if len(fieldInfo.name) == 0 {
+			// This field is inlined.
+			if err := toUnstructured(fv, dv); err != nil {
+				return err
+			}
+			continue
+		}
+		switch fv.Type().Kind() {
+		case reflect.String:
+			realMap[fieldInfo.name] = fv.String()
+		case reflect.Bool:
+			realMap[fieldInfo.name] = fv.Bool()
+		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+			realMap[fieldInfo.name] = fv.Int()
+		case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+			realMap[fieldInfo.name] = fv.Uint()
+		case reflect.Float32, reflect.Float64:
+			realMap[fieldInfo.name] = fv.Float()
+		default:
+			subv := reflect.New(dt.Elem()).Elem()
+			if err := toUnstructured(fv, subv); err != nil {
+				return err
+			}
+			dv.SetMapIndex(fieldInfo.nameValue, subv)
+		}
+	}
+	return nil
+}
+
+func interfaceToUnstructured(sv, dv reflect.Value) error {
+	if !sv.IsValid() || sv.IsNil() {
+		dv.Set(reflect.Zero(dv.Type()))
+		return nil
+	}
+	return toUnstructured(sv.Elem(), dv)
+}