diff options
Diffstat (limited to 'vendor/k8s.io/apimachinery/pkg/runtime/converter.go')
-rw-r--r-- | vendor/k8s.io/apimachinery/pkg/runtime/converter.go | 710 |
1 files changed, 0 insertions, 710 deletions
diff --git a/vendor/k8s.io/apimachinery/pkg/runtime/converter.go b/vendor/k8s.io/apimachinery/pkg/runtime/converter.go deleted file mode 100644 index 4a6cc6857..000000000 --- a/vendor/k8s.io/apimachinery/pkg/runtime/converter.go +++ /dev/null @@ -1,710 +0,0 @@ -/* -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 ( - 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" - "sigs.k8s.io/structured-merge-diff/v4/value" - - "k8s.io/klog/v2" -) - -// 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 ( - mapStringInterfaceType = reflect.TypeOf(map[string]interface{}{}) - stringType = reflect.TypeOf(string("")) - 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) { - klog.Fatalf("FromUnstructured unexpected error for %v: error: %v", u, err) - } - if err == nil && !c.comparison.DeepEqual(obj, newObj) { - klog.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: - 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. - entry := value.TypeReflectEntryOf(dv.Type()) - if entry.CanConvertFromUnstructured() { - return entry.FromUnstructured(sv, dv) - } - - 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 - break - } - } - } - 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 { - u = unstr.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) { - klog.Fatalf("ToUnstructured unexpected error for %v: error: %v; newErr: %v", obj, err, newErr) - } - if err == nil && !c.comparison.DeepEqual(u, newUnstr) { - klog.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() and also int64. -// bool, int64, float64, string, []interface{}, map[string]interface{}, json.Number and nil -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() and also int64. -// bool, int64, float64, string, []interface{}, map[string]interface{}, json.Number and nil -func DeepCopyJSONValue(x interface{}) interface{} { - switch x := x.(type) { - case map[string]interface{}: - if x == nil { - // Typed nil - an interface{} that contains a type map[string]interface{} with a value of nil - return x - } - clone := make(map[string]interface{}, len(x)) - for k, v := range x { - clone[k] = DeepCopyJSONValue(v) - } - return clone - case []interface{}: - if x == nil { - // Typed nil - an interface{} that contains a type []interface{} with a value of nil - return x - } - 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) -} - -func toUnstructured(sv, dv reflect.Value) error { - // Check if the object has a custom string converter. - entry := value.TypeReflectEntryOf(sv.Type()) - if entry.CanConvertToUnstructured() { - v, err := entry.ToUnstructured(sv) - if err != nil { - return err - } - if v != nil { - dv.Set(reflect.ValueOf(v)) - } - return nil - } - st := sv.Type() - switch st.Kind() { - case reflect.String: - dv.Set(reflect.ValueOf(sv.String())) - return nil - case reflect.Bool: - dv.Set(reflect.ValueOf(sv.Bool())) - return nil - case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: - dv.Set(reflect.ValueOf(sv.Int())) - return nil - case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64: - uVal := sv.Uint() - if uVal > math.MaxInt64 { - return fmt.Errorf("unsigned value %d does not fit into int64 (overflow)", uVal) - } - dv.Set(reflect.ValueOf(int64(uVal))) - return nil - case reflect.Float32, reflect.Float64: - 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.MakeMapWithSize(mapStringInterfaceType, st.NumField())) - 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) -} |