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|
package codegen
import (
"fmt"
"strings"
"github.com/viant/toolbox"
)
type Struct struct {
*toolbox.TypeInfo
referenced *toolbox.TypeInfo
*Generator
Alias string
Init string
Body string
}
//Generate generates decoderCode + structRelease + encoderCode
func (s *Struct) Generate() (string, error) {
return s.generateEncoding(s.TypeInfo)
}
func (s *Struct) generateEncoding(structInfo *toolbox.TypeInfo) (string, error) {
var initEmbedded, decodingCases, err = s.generateFieldDecoding(structInfo.Fields())
if err != nil {
return "", err
}
encodingCases, err := s.generateFieldEncoding(structInfo.Fields())
if err != nil {
return "", err
}
var resetCode = ""
if s.options.PoolObjects {
resetCode, err = s.generateReset(structInfo.Fields())
if err != nil {
return "", err
}
}
var data = struct {
Receiver string
Alias string
InitEmbedded string
EncodingCases string
DecodingCases string
Reset string
FieldCount int
}{
Receiver: s.Alias + " *" + s.Name,
DecodingCases: strings.Join(decodingCases, "\n"),
EncodingCases: strings.Join(encodingCases, "\n"),
FieldCount: len(decodingCases),
InitEmbedded: initEmbedded,
Reset: resetCode,
Alias: s.Alias,
}
return expandBlockTemplate(encodingStructType, data)
}
func (s *Struct) generateReset(fields []*toolbox.FieldInfo) (string, error) {
fieldReset, err := s.generateFieldReset(fields)
if err != nil {
return "", nil
}
return expandBlockTemplate(resetStruct, struct {
Reset string
Receiver string
}{
Reset: strings.Join(fieldReset, "\n"),
Receiver: s.Alias + " *" + s.Name,
})
}
func (s *Struct) generateFieldReset(fields []*toolbox.FieldInfo) ([]string, error) {
fieldReset := []string{}
for i := range fields {
var templateKey = -1
fieldTypeInfo := s.Type(normalizeTypeName(fields[i].TypeName))
field, err := NewField(s, fields[i], fieldTypeInfo)
if err != nil {
return nil, err
}
if field.IsPointer || field.IsSlice || (fieldTypeInfo != nil && fieldTypeInfo.IsSlice) {
templateKey = resetFieldValue
} else {
switch field.Type {
case "int", "int8", "int16", "int32", "int64", "uint", "uint8", "uint16", "uint32", "uint64", "float32", "float64", "string", "bool", "[]string", "[]bool", "[]int", "[]int8", "[]int16", "[]int32", "[]int64", "[]uint", "[]uint8", "[]uint16", "[]uint32", "[]uint64", "[]float32", "[]float64", "[]byte":
templateKey = resetFieldValue
}
}
if templateKey != -1 {
code, err := expandFieldTemplate(templateKey, field)
if err != nil {
return nil, err
}
fieldReset = append(fieldReset, code)
}
}
return fieldReset, nil
}
func (s *Struct) generateFieldDecoding(fields []*toolbox.FieldInfo) (string, []string, error) {
fieldCases := []string{}
var initCode = ""
for i := range fields {
if isSkipable(s.options, fields[i]) {
continue
}
var templateKey = -1
fieldTypeInfo := s.Type(normalizeTypeName(fields[i].TypeName))
field, err := NewField(s, fields[i], fieldTypeInfo)
if err != nil {
return "", nil, err
}
if fieldTypeInfo != nil {
if err = s.generateStructCode(fieldTypeInfo.Name); err != nil {
return "", nil, err
}
}
if field.IsAnonymous {
if fieldTypeInfo != nil {
if field.IsPointer {
init, err := expandBlockTemplate(embeddedStructInit, field)
if err != nil {
return "", nil, err
}
initCode += init
}
init, embeddedCases, err := s.generateFieldDecoding(fieldTypeInfo.Fields())
if err != nil {
return "", nil, err
}
initCode += init
fieldCases = append(fieldCases, embeddedCases...)
}
continue
}
main:
switch field.Type {
case "string", "bool", "int", "int8", "int16", "int32", "int64", "uint", "uint8", "uint16", "uint32", "uint64", "float32", "float64":
templateKey = decodeBaseType
case "[]string", "[]bool", "[]int", "[]int8", "[]int16", "[]int32", "[]int64", "[]uint", "[]uint8", "[]uint16", "[]uint32", "[]uint64", "[]float32", "[]float64":
templateKey = decodeBaseTypeSlice
s.generatePrimitiveArray(field)
case "[]byte":
templateKey = decodeRawType
default:
if fieldTypeInfo != nil {
if !(field.IsSlice || fieldTypeInfo.IsSlice) {
templateKey = decodeStruct
break main
}
switch fieldTypeInfo.ComponentType {
case "byte":
templateKey = decodeRawType
break main
case "string", "bool", "int", "int8", "int16", "int32", "int64", "uint", "uint8", "uint16", "uint32", "uint64", "float32", "float64":
s.generatePrimitiveArray(field)
templateKey = decodeBaseTypeSlice
break main
}
if err = s.generateStructCode(field.ComponentType); err != nil {
return "", nil, err
}
templateKey = decodeStructSlice
if err = s.generateObjectArray(field); err != nil {
return "", nil, err
}
break main
} else if field.IsSlice {
if f, _, ok := s.typedFieldDecode(field, field.ComponentType); ok {
templateKey = decodeStructSlice
if err = f(field); err != nil {
return "", nil, err
}
} else {
templateKey = decodeStructSlice
if err = s.generateObjectArray(field); err != nil {
return "", nil, err
}
}
} else if _, k, ok := s.typedFieldDecode(field, field.Type); ok {
templateKey = k
} else {
// templateKey = decodeUnknown
return "", nil, fmt.Errorf("Unknown type %s for field %s", field.Type, field.Name)
}
}
if templateKey != -1 {
decodingCase, err := expandFieldTemplate(templateKey, field)
if err != nil {
return "", nil, err
}
fieldCases = append(fieldCases, decodingCase)
}
}
return initCode, fieldCases, nil
}
func (s *Struct) generateEmbeddedFieldEncoding(field *Field, fieldTypeInfo *toolbox.TypeInfo) ([]string, error) {
var result = []string{}
if fieldTypeInfo != nil {
embeddedCases, err := s.generateFieldEncoding(fieldTypeInfo.Fields())
if err != nil {
return nil, err
}
if field.IsPointer {
result = append(result, fmt.Sprintf(" if %v != nil {", field.Accessor))
for _, code := range embeddedCases {
result = append(result, " "+code)
}
result = append(result, " }")
} else {
result = append(result, embeddedCases...)
}
}
return result, nil
}
func (s *Struct) generateFieldEncoding(fields []*toolbox.FieldInfo) ([]string, error) {
fieldCases := []string{}
for i := range fields {
if isSkipable(s.options, fields[i]) {
continue
}
var templateKey = -1
fieldTypeInfo := s.Type(normalizeTypeName(fields[i].TypeName))
field, err := NewField(s, fields[i], fieldTypeInfo)
if err != nil {
return nil, err
}
if field.IsAnonymous {
embedded, err := s.generateEmbeddedFieldEncoding(field, fieldTypeInfo)
if err != nil {
return nil, err
}
fieldCases = append(fieldCases, embedded...)
continue
}
main:
switch field.Type {
case "string", "bool", "int", "int8", "int16", "int32", "int64", "uint", "uint8", "uint16", "uint32", "uint64", "float32", "float64":
templateKey = encodeBaseType
case "[]string", "[]bool", "[]int", "[]int8", "[]int16", "[]int32", "[]int64", "[]uint", "[]uint8", "[]uint16", "[]uint32", "[]uint64", "[]float32", "[]float64":
templateKey = encodeBaseTypeSlice
s.generatePrimitiveArray(field)
case "[]byte":
templateKey = encodeRawType
default:
if fieldTypeInfo != nil {
if !(field.IsSlice || fieldTypeInfo.IsSlice) {
templateKey = encodeStruct
break main
}
switch fieldTypeInfo.ComponentType {
case "byte":
templateKey = encodeRawType
break main
case "string", "bool", "int", "int8", "int16", "int32", "int64", "uint", "uint8", "uint16", "uint32", "uint64", "float32", "float64":
templateKey = decodeBaseTypeSlice
break main
}
templateKey = encodeStructSlice
break main
} else if field.IsSlice {
templateKey = encodeStructSlice
} else if _, k, ok := s.typedFieldEncode(field, field.Type); ok {
templateKey = k
} else {
// templateKey = decodeUnknown
return nil, fmt.Errorf("Unknown type %s for field %s", field.Type, field.Name)
}
}
if templateKey != -1 {
decodingCase, err := expandFieldTemplate(templateKey, field)
if err != nil {
return nil, err
}
fieldCases = append(fieldCases, decodingCase)
}
}
return fieldCases, nil
}
var sqlNullTypes = []string{
"Bool",
"Float64",
"Int64",
"String",
"Time",
}
func (s *Struct) typedFieldEncode(field *Field, typeName string) (func(*Field) error, int, bool) {
if strings.Contains(typeName, "time.Time") {
return s.generateTimeArray, encodeTime, true
} else if strings.Contains(typeName, "sql.Null") {
for _, nullType := range sqlNullTypes {
if strings.Contains(typeName, nullType) {
field.NullType = nullType
field.GojayMethod = "SQLNull" + nullType
}
}
return s.generateTypedArray, encodeSQLNull, true
}
return nil, 0, false
}
func (s *Struct) typedFieldDecode(field *Field, typeName string) (func(*Field) error, int, bool) {
if strings.Contains(typeName, "time.Time") {
s.addImport("time")
return s.generateTimeArray, decodeTime, true
} else if strings.Contains(typeName, "sql.Null") {
for _, nullType := range sqlNullTypes {
if strings.Contains(typeName, nullType) {
field.NullType = nullType
field.GojayMethod = "SQLNull" + nullType
}
}
s.addImport("database/sql")
return s.generateTypedArray, decodeSQLNull, true
}
return nil, 0, false
}
func NewStruct(info *toolbox.TypeInfo, generator *Generator) *Struct {
return &Struct{
TypeInfo: info,
Generator: generator,
Alias: extractReceiverAlias(info.Name),
}
}
|
