mirror of
https://github.com/go-gitea/gitea.git
synced 2024-10-31 08:37:35 -04:00
484 lines
14 KiB
Go
484 lines
14 KiB
Go
|
package jsoniter
|
||
|
|
||
|
import (
|
||
|
"fmt"
|
||
|
"github.com/modern-go/reflect2"
|
||
|
"reflect"
|
||
|
"sort"
|
||
|
"strings"
|
||
|
"unicode"
|
||
|
"unsafe"
|
||
|
)
|
||
|
|
||
|
var typeDecoders = map[string]ValDecoder{}
|
||
|
var fieldDecoders = map[string]ValDecoder{}
|
||
|
var typeEncoders = map[string]ValEncoder{}
|
||
|
var fieldEncoders = map[string]ValEncoder{}
|
||
|
var extensions = []Extension{}
|
||
|
|
||
|
// StructDescriptor describe how should we encode/decode the struct
|
||
|
type StructDescriptor struct {
|
||
|
Type reflect2.Type
|
||
|
Fields []*Binding
|
||
|
}
|
||
|
|
||
|
// GetField get one field from the descriptor by its name.
|
||
|
// Can not use map here to keep field orders.
|
||
|
func (structDescriptor *StructDescriptor) GetField(fieldName string) *Binding {
|
||
|
for _, binding := range structDescriptor.Fields {
|
||
|
if binding.Field.Name() == fieldName {
|
||
|
return binding
|
||
|
}
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// Binding describe how should we encode/decode the struct field
|
||
|
type Binding struct {
|
||
|
levels []int
|
||
|
Field reflect2.StructField
|
||
|
FromNames []string
|
||
|
ToNames []string
|
||
|
Encoder ValEncoder
|
||
|
Decoder ValDecoder
|
||
|
}
|
||
|
|
||
|
// Extension the one for all SPI. Customize encoding/decoding by specifying alternate encoder/decoder.
|
||
|
// Can also rename fields by UpdateStructDescriptor.
|
||
|
type Extension interface {
|
||
|
UpdateStructDescriptor(structDescriptor *StructDescriptor)
|
||
|
CreateMapKeyDecoder(typ reflect2.Type) ValDecoder
|
||
|
CreateMapKeyEncoder(typ reflect2.Type) ValEncoder
|
||
|
CreateDecoder(typ reflect2.Type) ValDecoder
|
||
|
CreateEncoder(typ reflect2.Type) ValEncoder
|
||
|
DecorateDecoder(typ reflect2.Type, decoder ValDecoder) ValDecoder
|
||
|
DecorateEncoder(typ reflect2.Type, encoder ValEncoder) ValEncoder
|
||
|
}
|
||
|
|
||
|
// DummyExtension embed this type get dummy implementation for all methods of Extension
|
||
|
type DummyExtension struct {
|
||
|
}
|
||
|
|
||
|
// UpdateStructDescriptor No-op
|
||
|
func (extension *DummyExtension) UpdateStructDescriptor(structDescriptor *StructDescriptor) {
|
||
|
}
|
||
|
|
||
|
// CreateMapKeyDecoder No-op
|
||
|
func (extension *DummyExtension) CreateMapKeyDecoder(typ reflect2.Type) ValDecoder {
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// CreateMapKeyEncoder No-op
|
||
|
func (extension *DummyExtension) CreateMapKeyEncoder(typ reflect2.Type) ValEncoder {
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// CreateDecoder No-op
|
||
|
func (extension *DummyExtension) CreateDecoder(typ reflect2.Type) ValDecoder {
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// CreateEncoder No-op
|
||
|
func (extension *DummyExtension) CreateEncoder(typ reflect2.Type) ValEncoder {
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// DecorateDecoder No-op
|
||
|
func (extension *DummyExtension) DecorateDecoder(typ reflect2.Type, decoder ValDecoder) ValDecoder {
|
||
|
return decoder
|
||
|
}
|
||
|
|
||
|
// DecorateEncoder No-op
|
||
|
func (extension *DummyExtension) DecorateEncoder(typ reflect2.Type, encoder ValEncoder) ValEncoder {
|
||
|
return encoder
|
||
|
}
|
||
|
|
||
|
type EncoderExtension map[reflect2.Type]ValEncoder
|
||
|
|
||
|
// UpdateStructDescriptor No-op
|
||
|
func (extension EncoderExtension) UpdateStructDescriptor(structDescriptor *StructDescriptor) {
|
||
|
}
|
||
|
|
||
|
// CreateDecoder No-op
|
||
|
func (extension EncoderExtension) CreateDecoder(typ reflect2.Type) ValDecoder {
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// CreateEncoder get encoder from map
|
||
|
func (extension EncoderExtension) CreateEncoder(typ reflect2.Type) ValEncoder {
|
||
|
return extension[typ]
|
||
|
}
|
||
|
|
||
|
// CreateMapKeyDecoder No-op
|
||
|
func (extension EncoderExtension) CreateMapKeyDecoder(typ reflect2.Type) ValDecoder {
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// CreateMapKeyEncoder No-op
|
||
|
func (extension EncoderExtension) CreateMapKeyEncoder(typ reflect2.Type) ValEncoder {
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// DecorateDecoder No-op
|
||
|
func (extension EncoderExtension) DecorateDecoder(typ reflect2.Type, decoder ValDecoder) ValDecoder {
|
||
|
return decoder
|
||
|
}
|
||
|
|
||
|
// DecorateEncoder No-op
|
||
|
func (extension EncoderExtension) DecorateEncoder(typ reflect2.Type, encoder ValEncoder) ValEncoder {
|
||
|
return encoder
|
||
|
}
|
||
|
|
||
|
type DecoderExtension map[reflect2.Type]ValDecoder
|
||
|
|
||
|
// UpdateStructDescriptor No-op
|
||
|
func (extension DecoderExtension) UpdateStructDescriptor(structDescriptor *StructDescriptor) {
|
||
|
}
|
||
|
|
||
|
// CreateMapKeyDecoder No-op
|
||
|
func (extension DecoderExtension) CreateMapKeyDecoder(typ reflect2.Type) ValDecoder {
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// CreateMapKeyEncoder No-op
|
||
|
func (extension DecoderExtension) CreateMapKeyEncoder(typ reflect2.Type) ValEncoder {
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// CreateDecoder get decoder from map
|
||
|
func (extension DecoderExtension) CreateDecoder(typ reflect2.Type) ValDecoder {
|
||
|
return extension[typ]
|
||
|
}
|
||
|
|
||
|
// CreateEncoder No-op
|
||
|
func (extension DecoderExtension) CreateEncoder(typ reflect2.Type) ValEncoder {
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// DecorateDecoder No-op
|
||
|
func (extension DecoderExtension) DecorateDecoder(typ reflect2.Type, decoder ValDecoder) ValDecoder {
|
||
|
return decoder
|
||
|
}
|
||
|
|
||
|
// DecorateEncoder No-op
|
||
|
func (extension DecoderExtension) DecorateEncoder(typ reflect2.Type, encoder ValEncoder) ValEncoder {
|
||
|
return encoder
|
||
|
}
|
||
|
|
||
|
type funcDecoder struct {
|
||
|
fun DecoderFunc
|
||
|
}
|
||
|
|
||
|
func (decoder *funcDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
|
||
|
decoder.fun(ptr, iter)
|
||
|
}
|
||
|
|
||
|
type funcEncoder struct {
|
||
|
fun EncoderFunc
|
||
|
isEmptyFunc func(ptr unsafe.Pointer) bool
|
||
|
}
|
||
|
|
||
|
func (encoder *funcEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
|
||
|
encoder.fun(ptr, stream)
|
||
|
}
|
||
|
|
||
|
func (encoder *funcEncoder) IsEmpty(ptr unsafe.Pointer) bool {
|
||
|
if encoder.isEmptyFunc == nil {
|
||
|
return false
|
||
|
}
|
||
|
return encoder.isEmptyFunc(ptr)
|
||
|
}
|
||
|
|
||
|
// DecoderFunc the function form of TypeDecoder
|
||
|
type DecoderFunc func(ptr unsafe.Pointer, iter *Iterator)
|
||
|
|
||
|
// EncoderFunc the function form of TypeEncoder
|
||
|
type EncoderFunc func(ptr unsafe.Pointer, stream *Stream)
|
||
|
|
||
|
// RegisterTypeDecoderFunc register TypeDecoder for a type with function
|
||
|
func RegisterTypeDecoderFunc(typ string, fun DecoderFunc) {
|
||
|
typeDecoders[typ] = &funcDecoder{fun}
|
||
|
}
|
||
|
|
||
|
// RegisterTypeDecoder register TypeDecoder for a typ
|
||
|
func RegisterTypeDecoder(typ string, decoder ValDecoder) {
|
||
|
typeDecoders[typ] = decoder
|
||
|
}
|
||
|
|
||
|
// RegisterFieldDecoderFunc register TypeDecoder for a struct field with function
|
||
|
func RegisterFieldDecoderFunc(typ string, field string, fun DecoderFunc) {
|
||
|
RegisterFieldDecoder(typ, field, &funcDecoder{fun})
|
||
|
}
|
||
|
|
||
|
// RegisterFieldDecoder register TypeDecoder for a struct field
|
||
|
func RegisterFieldDecoder(typ string, field string, decoder ValDecoder) {
|
||
|
fieldDecoders[fmt.Sprintf("%s/%s", typ, field)] = decoder
|
||
|
}
|
||
|
|
||
|
// RegisterTypeEncoderFunc register TypeEncoder for a type with encode/isEmpty function
|
||
|
func RegisterTypeEncoderFunc(typ string, fun EncoderFunc, isEmptyFunc func(unsafe.Pointer) bool) {
|
||
|
typeEncoders[typ] = &funcEncoder{fun, isEmptyFunc}
|
||
|
}
|
||
|
|
||
|
// RegisterTypeEncoder register TypeEncoder for a type
|
||
|
func RegisterTypeEncoder(typ string, encoder ValEncoder) {
|
||
|
typeEncoders[typ] = encoder
|
||
|
}
|
||
|
|
||
|
// RegisterFieldEncoderFunc register TypeEncoder for a struct field with encode/isEmpty function
|
||
|
func RegisterFieldEncoderFunc(typ string, field string, fun EncoderFunc, isEmptyFunc func(unsafe.Pointer) bool) {
|
||
|
RegisterFieldEncoder(typ, field, &funcEncoder{fun, isEmptyFunc})
|
||
|
}
|
||
|
|
||
|
// RegisterFieldEncoder register TypeEncoder for a struct field
|
||
|
func RegisterFieldEncoder(typ string, field string, encoder ValEncoder) {
|
||
|
fieldEncoders[fmt.Sprintf("%s/%s", typ, field)] = encoder
|
||
|
}
|
||
|
|
||
|
// RegisterExtension register extension
|
||
|
func RegisterExtension(extension Extension) {
|
||
|
extensions = append(extensions, extension)
|
||
|
}
|
||
|
|
||
|
func getTypeDecoderFromExtension(ctx *ctx, typ reflect2.Type) ValDecoder {
|
||
|
decoder := _getTypeDecoderFromExtension(ctx, typ)
|
||
|
if decoder != nil {
|
||
|
for _, extension := range extensions {
|
||
|
decoder = extension.DecorateDecoder(typ, decoder)
|
||
|
}
|
||
|
decoder = ctx.decoderExtension.DecorateDecoder(typ, decoder)
|
||
|
for _, extension := range ctx.extraExtensions {
|
||
|
decoder = extension.DecorateDecoder(typ, decoder)
|
||
|
}
|
||
|
}
|
||
|
return decoder
|
||
|
}
|
||
|
func _getTypeDecoderFromExtension(ctx *ctx, typ reflect2.Type) ValDecoder {
|
||
|
for _, extension := range extensions {
|
||
|
decoder := extension.CreateDecoder(typ)
|
||
|
if decoder != nil {
|
||
|
return decoder
|
||
|
}
|
||
|
}
|
||
|
decoder := ctx.decoderExtension.CreateDecoder(typ)
|
||
|
if decoder != nil {
|
||
|
return decoder
|
||
|
}
|
||
|
for _, extension := range ctx.extraExtensions {
|
||
|
decoder := extension.CreateDecoder(typ)
|
||
|
if decoder != nil {
|
||
|
return decoder
|
||
|
}
|
||
|
}
|
||
|
typeName := typ.String()
|
||
|
decoder = typeDecoders[typeName]
|
||
|
if decoder != nil {
|
||
|
return decoder
|
||
|
}
|
||
|
if typ.Kind() == reflect.Ptr {
|
||
|
ptrType := typ.(*reflect2.UnsafePtrType)
|
||
|
decoder := typeDecoders[ptrType.Elem().String()]
|
||
|
if decoder != nil {
|
||
|
return &OptionalDecoder{ptrType.Elem(), decoder}
|
||
|
}
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
func getTypeEncoderFromExtension(ctx *ctx, typ reflect2.Type) ValEncoder {
|
||
|
encoder := _getTypeEncoderFromExtension(ctx, typ)
|
||
|
if encoder != nil {
|
||
|
for _, extension := range extensions {
|
||
|
encoder = extension.DecorateEncoder(typ, encoder)
|
||
|
}
|
||
|
encoder = ctx.encoderExtension.DecorateEncoder(typ, encoder)
|
||
|
for _, extension := range ctx.extraExtensions {
|
||
|
encoder = extension.DecorateEncoder(typ, encoder)
|
||
|
}
|
||
|
}
|
||
|
return encoder
|
||
|
}
|
||
|
|
||
|
func _getTypeEncoderFromExtension(ctx *ctx, typ reflect2.Type) ValEncoder {
|
||
|
for _, extension := range extensions {
|
||
|
encoder := extension.CreateEncoder(typ)
|
||
|
if encoder != nil {
|
||
|
return encoder
|
||
|
}
|
||
|
}
|
||
|
encoder := ctx.encoderExtension.CreateEncoder(typ)
|
||
|
if encoder != nil {
|
||
|
return encoder
|
||
|
}
|
||
|
for _, extension := range ctx.extraExtensions {
|
||
|
encoder := extension.CreateEncoder(typ)
|
||
|
if encoder != nil {
|
||
|
return encoder
|
||
|
}
|
||
|
}
|
||
|
typeName := typ.String()
|
||
|
encoder = typeEncoders[typeName]
|
||
|
if encoder != nil {
|
||
|
return encoder
|
||
|
}
|
||
|
if typ.Kind() == reflect.Ptr {
|
||
|
typePtr := typ.(*reflect2.UnsafePtrType)
|
||
|
encoder := typeEncoders[typePtr.Elem().String()]
|
||
|
if encoder != nil {
|
||
|
return &OptionalEncoder{encoder}
|
||
|
}
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
func describeStruct(ctx *ctx, typ reflect2.Type) *StructDescriptor {
|
||
|
structType := typ.(*reflect2.UnsafeStructType)
|
||
|
embeddedBindings := []*Binding{}
|
||
|
bindings := []*Binding{}
|
||
|
for i := 0; i < structType.NumField(); i++ {
|
||
|
field := structType.Field(i)
|
||
|
tag, hastag := field.Tag().Lookup(ctx.getTagKey())
|
||
|
if ctx.onlyTaggedField && !hastag && !field.Anonymous() {
|
||
|
continue
|
||
|
}
|
||
|
if tag == "-" || field.Name() == "_" {
|
||
|
continue
|
||
|
}
|
||
|
tagParts := strings.Split(tag, ",")
|
||
|
if field.Anonymous() && (tag == "" || tagParts[0] == "") {
|
||
|
if field.Type().Kind() == reflect.Struct {
|
||
|
structDescriptor := describeStruct(ctx, field.Type())
|
||
|
for _, binding := range structDescriptor.Fields {
|
||
|
binding.levels = append([]int{i}, binding.levels...)
|
||
|
omitempty := binding.Encoder.(*structFieldEncoder).omitempty
|
||
|
binding.Encoder = &structFieldEncoder{field, binding.Encoder, omitempty}
|
||
|
binding.Decoder = &structFieldDecoder{field, binding.Decoder}
|
||
|
embeddedBindings = append(embeddedBindings, binding)
|
||
|
}
|
||
|
continue
|
||
|
} else if field.Type().Kind() == reflect.Ptr {
|
||
|
ptrType := field.Type().(*reflect2.UnsafePtrType)
|
||
|
if ptrType.Elem().Kind() == reflect.Struct {
|
||
|
structDescriptor := describeStruct(ctx, ptrType.Elem())
|
||
|
for _, binding := range structDescriptor.Fields {
|
||
|
binding.levels = append([]int{i}, binding.levels...)
|
||
|
omitempty := binding.Encoder.(*structFieldEncoder).omitempty
|
||
|
binding.Encoder = &dereferenceEncoder{binding.Encoder}
|
||
|
binding.Encoder = &structFieldEncoder{field, binding.Encoder, omitempty}
|
||
|
binding.Decoder = &dereferenceDecoder{ptrType.Elem(), binding.Decoder}
|
||
|
binding.Decoder = &structFieldDecoder{field, binding.Decoder}
|
||
|
embeddedBindings = append(embeddedBindings, binding)
|
||
|
}
|
||
|
continue
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
fieldNames := calcFieldNames(field.Name(), tagParts[0], tag)
|
||
|
fieldCacheKey := fmt.Sprintf("%s/%s", typ.String(), field.Name())
|
||
|
decoder := fieldDecoders[fieldCacheKey]
|
||
|
if decoder == nil {
|
||
|
decoder = decoderOfType(ctx.append(field.Name()), field.Type())
|
||
|
}
|
||
|
encoder := fieldEncoders[fieldCacheKey]
|
||
|
if encoder == nil {
|
||
|
encoder = encoderOfType(ctx.append(field.Name()), field.Type())
|
||
|
}
|
||
|
binding := &Binding{
|
||
|
Field: field,
|
||
|
FromNames: fieldNames,
|
||
|
ToNames: fieldNames,
|
||
|
Decoder: decoder,
|
||
|
Encoder: encoder,
|
||
|
}
|
||
|
binding.levels = []int{i}
|
||
|
bindings = append(bindings, binding)
|
||
|
}
|
||
|
return createStructDescriptor(ctx, typ, bindings, embeddedBindings)
|
||
|
}
|
||
|
func createStructDescriptor(ctx *ctx, typ reflect2.Type, bindings []*Binding, embeddedBindings []*Binding) *StructDescriptor {
|
||
|
structDescriptor := &StructDescriptor{
|
||
|
Type: typ,
|
||
|
Fields: bindings,
|
||
|
}
|
||
|
for _, extension := range extensions {
|
||
|
extension.UpdateStructDescriptor(structDescriptor)
|
||
|
}
|
||
|
ctx.encoderExtension.UpdateStructDescriptor(structDescriptor)
|
||
|
ctx.decoderExtension.UpdateStructDescriptor(structDescriptor)
|
||
|
for _, extension := range ctx.extraExtensions {
|
||
|
extension.UpdateStructDescriptor(structDescriptor)
|
||
|
}
|
||
|
processTags(structDescriptor, ctx.frozenConfig)
|
||
|
// merge normal & embedded bindings & sort with original order
|
||
|
allBindings := sortableBindings(append(embeddedBindings, structDescriptor.Fields...))
|
||
|
sort.Sort(allBindings)
|
||
|
structDescriptor.Fields = allBindings
|
||
|
return structDescriptor
|
||
|
}
|
||
|
|
||
|
type sortableBindings []*Binding
|
||
|
|
||
|
func (bindings sortableBindings) Len() int {
|
||
|
return len(bindings)
|
||
|
}
|
||
|
|
||
|
func (bindings sortableBindings) Less(i, j int) bool {
|
||
|
left := bindings[i].levels
|
||
|
right := bindings[j].levels
|
||
|
k := 0
|
||
|
for {
|
||
|
if left[k] < right[k] {
|
||
|
return true
|
||
|
} else if left[k] > right[k] {
|
||
|
return false
|
||
|
}
|
||
|
k++
|
||
|
}
|
||
|
}
|
||
|
|
||
|
func (bindings sortableBindings) Swap(i, j int) {
|
||
|
bindings[i], bindings[j] = bindings[j], bindings[i]
|
||
|
}
|
||
|
|
||
|
func processTags(structDescriptor *StructDescriptor, cfg *frozenConfig) {
|
||
|
for _, binding := range structDescriptor.Fields {
|
||
|
shouldOmitEmpty := false
|
||
|
tagParts := strings.Split(binding.Field.Tag().Get(cfg.getTagKey()), ",")
|
||
|
for _, tagPart := range tagParts[1:] {
|
||
|
if tagPart == "omitempty" {
|
||
|
shouldOmitEmpty = true
|
||
|
} else if tagPart == "string" {
|
||
|
if binding.Field.Type().Kind() == reflect.String {
|
||
|
binding.Decoder = &stringModeStringDecoder{binding.Decoder, cfg}
|
||
|
binding.Encoder = &stringModeStringEncoder{binding.Encoder, cfg}
|
||
|
} else {
|
||
|
binding.Decoder = &stringModeNumberDecoder{binding.Decoder}
|
||
|
binding.Encoder = &stringModeNumberEncoder{binding.Encoder}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
binding.Decoder = &structFieldDecoder{binding.Field, binding.Decoder}
|
||
|
binding.Encoder = &structFieldEncoder{binding.Field, binding.Encoder, shouldOmitEmpty}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
func calcFieldNames(originalFieldName string, tagProvidedFieldName string, wholeTag string) []string {
|
||
|
// ignore?
|
||
|
if wholeTag == "-" {
|
||
|
return []string{}
|
||
|
}
|
||
|
// rename?
|
||
|
var fieldNames []string
|
||
|
if tagProvidedFieldName == "" {
|
||
|
fieldNames = []string{originalFieldName}
|
||
|
} else {
|
||
|
fieldNames = []string{tagProvidedFieldName}
|
||
|
}
|
||
|
// private?
|
||
|
isNotExported := unicode.IsLower(rune(originalFieldName[0])) || originalFieldName[0] == '_'
|
||
|
if isNotExported {
|
||
|
fieldNames = []string{}
|
||
|
}
|
||
|
return fieldNames
|
||
|
}
|