summaryrefslogtreecommitdiff
path: root/vendor/k8s.io/apimachinery/pkg/runtime/converter.go
diff options
context:
space:
mode:
Diffstat (limited to 'vendor/k8s.io/apimachinery/pkg/runtime/converter.go')
-rw-r--r--vendor/k8s.io/apimachinery/pkg/runtime/converter.go793
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)
+}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-10-12 12:25:32 +0000