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path: root/vendor/github.com/ulule/deepcopier/deepcopier.go
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Diffstat (limited to 'vendor/github.com/ulule/deepcopier/deepcopier.go')
-rw-r--r--vendor/github.com/ulule/deepcopier/deepcopier.go362
1 files changed, 0 insertions, 362 deletions
diff --git a/vendor/github.com/ulule/deepcopier/deepcopier.go b/vendor/github.com/ulule/deepcopier/deepcopier.go
deleted file mode 100644
index 8a6c70b55..000000000
--- a/vendor/github.com/ulule/deepcopier/deepcopier.go
+++ /dev/null
@@ -1,362 +0,0 @@
-package deepcopier
-
-import (
- "database/sql/driver"
- "fmt"
- "reflect"
- "strings"
-)
-
-const (
- // TagName is the deepcopier struct tag name.
- TagName = "deepcopier"
- // FieldOptionName is the from field option name for struct tag.
- FieldOptionName = "field"
- // ContextOptionName is the context option name for struct tag.
- ContextOptionName = "context"
- // SkipOptionName is the skip option name for struct tag.
- SkipOptionName = "skip"
- // ForceOptionName is the skip option name for struct tag.
- ForceOptionName = "force"
-)
-
-type (
- // TagOptions is a map that contains extracted struct tag options.
- TagOptions map[string]string
-
- // Options are copier options.
- Options struct {
- // Context given to WithContext() method.
- Context map[string]interface{}
- // Reversed reverses struct tag checkings.
- Reversed bool
- }
-)
-
-// DeepCopier deep copies a struct to/from a struct.
-type DeepCopier struct {
- dst interface{}
- src interface{}
- ctx map[string]interface{}
-}
-
-// Copy sets source or destination.
-func Copy(src interface{}) *DeepCopier {
- return &DeepCopier{src: src}
-}
-
-// WithContext injects the given context into the builder instance.
-func (dc *DeepCopier) WithContext(ctx map[string]interface{}) *DeepCopier {
- dc.ctx = ctx
- return dc
-}
-
-// To sets the destination.
-func (dc *DeepCopier) To(dst interface{}) error {
- dc.dst = dst
- return process(dc.dst, dc.src, Options{Context: dc.ctx})
-}
-
-// From sets the given the source as destination and destination as source.
-func (dc *DeepCopier) From(src interface{}) error {
- dc.dst = dc.src
- dc.src = src
- return process(dc.dst, dc.src, Options{Context: dc.ctx, Reversed: true})
-}
-
-// process handles copy.
-func process(dst interface{}, src interface{}, args ...Options) error {
- var (
- options = Options{}
- srcValue = reflect.Indirect(reflect.ValueOf(src))
- dstValue = reflect.Indirect(reflect.ValueOf(dst))
- srcFieldNames = getFieldNames(src)
- srcMethodNames = getMethodNames(src)
- )
-
- if len(args) > 0 {
- options = args[0]
- }
-
- if !dstValue.CanAddr() {
- return fmt.Errorf("destination %+v is unaddressable", dstValue.Interface())
- }
-
- for _, f := range srcFieldNames {
- var (
- srcFieldValue = srcValue.FieldByName(f)
- srcFieldType, srcFieldFound = srcValue.Type().FieldByName(f)
- srcFieldName = srcFieldType.Name
- dstFieldName = srcFieldName
- tagOptions TagOptions
- )
-
- if !srcFieldFound {
- continue
- }
-
- if options.Reversed {
- tagOptions = getTagOptions(srcFieldType.Tag.Get(TagName))
- if v, ok := tagOptions[FieldOptionName]; ok && v != "" {
- dstFieldName = v
- }
- } else {
- if name, opts := getRelatedField(dst, srcFieldName); name != "" {
- dstFieldName, tagOptions = name, opts
- }
- }
-
- if _, ok := tagOptions[SkipOptionName]; ok {
- continue
- }
-
- var (
- dstFieldType, dstFieldFound = dstValue.Type().FieldByName(dstFieldName)
- dstFieldValue = dstValue.FieldByName(dstFieldName)
- )
-
- if !dstFieldFound {
- continue
- }
-
- // Force option for empty interfaces and nullable types
- _, force := tagOptions[ForceOptionName]
-
- // Valuer -> ptr
- if isNullableType(srcFieldType.Type) && dstFieldValue.Kind() == reflect.Ptr && force {
- // We have same nullable type on both sides
- if srcFieldValue.Type().AssignableTo(dstFieldType.Type) {
- dstFieldValue.Set(srcFieldValue)
- continue
- }
-
- v, _ := srcFieldValue.Interface().(driver.Valuer).Value()
- if v == nil {
- continue
- }
-
- valueType := reflect.TypeOf(v)
-
- ptr := reflect.New(valueType)
- ptr.Elem().Set(reflect.ValueOf(v))
-
- if valueType.AssignableTo(dstFieldType.Type.Elem()) {
- dstFieldValue.Set(ptr)
- }
-
- continue
- }
-
- // Valuer -> value
- if isNullableType(srcFieldType.Type) {
- // We have same nullable type on both sides
- if srcFieldValue.Type().AssignableTo(dstFieldType.Type) {
- dstFieldValue.Set(srcFieldValue)
- continue
- }
-
- if force {
- v, _ := srcFieldValue.Interface().(driver.Valuer).Value()
- if v == nil {
- continue
- }
-
- rv := reflect.ValueOf(v)
- if rv.Type().AssignableTo(dstFieldType.Type) {
- dstFieldValue.Set(rv)
- }
- }
-
- continue
- }
-
- if dstFieldValue.Kind() == reflect.Interface {
- if force {
- dstFieldValue.Set(srcFieldValue)
- }
- continue
- }
-
- // Ptr -> Value
- if srcFieldType.Type.Kind() == reflect.Ptr && !srcFieldValue.IsNil() && dstFieldType.Type.Kind() != reflect.Ptr {
- indirect := reflect.Indirect(srcFieldValue)
-
- if indirect.Type().AssignableTo(dstFieldType.Type) {
- dstFieldValue.Set(indirect)
- continue
- }
- }
-
- // Other types
- if srcFieldType.Type.AssignableTo(dstFieldType.Type) {
- dstFieldValue.Set(srcFieldValue)
- }
- }
-
- for _, m := range srcMethodNames {
- name, opts := getRelatedField(dst, m)
- if name == "" {
- continue
- }
-
- if _, ok := opts[SkipOptionName]; ok {
- continue
- }
-
- method := reflect.ValueOf(src).MethodByName(m)
- if !method.IsValid() {
- return fmt.Errorf("method %s is invalid", m)
- }
-
- var (
- dstFieldType, _ = dstValue.Type().FieldByName(name)
- dstFieldValue = dstValue.FieldByName(name)
- _, withContext = opts[ContextOptionName]
- _, force = opts[ForceOptionName]
- )
-
- args := []reflect.Value{}
- if withContext {
- args = []reflect.Value{reflect.ValueOf(options.Context)}
- }
-
- var (
- result = method.Call(args)[0]
- resultInterface = result.Interface()
- resultValue = reflect.ValueOf(resultInterface)
- resultType = resultValue.Type()
- )
-
- // Value -> Ptr
- if dstFieldValue.Kind() == reflect.Ptr && force {
- ptr := reflect.New(resultType)
- ptr.Elem().Set(resultValue)
-
- if ptr.Type().AssignableTo(dstFieldType.Type) {
- dstFieldValue.Set(ptr)
- }
-
- continue
- }
-
- // Ptr -> value
- if resultValue.Kind() == reflect.Ptr && force {
- if resultValue.Elem().Type().AssignableTo(dstFieldType.Type) {
- dstFieldValue.Set(resultValue.Elem())
- }
-
- continue
- }
-
- if resultType.AssignableTo(dstFieldType.Type) && result.IsValid() {
- dstFieldValue.Set(result)
- }
- }
-
- return nil
-}
-
-// getTagOptions parses deepcopier tag field and returns options.
-func getTagOptions(value string) TagOptions {
- options := TagOptions{}
-
- for _, opt := range strings.Split(value, ";") {
- o := strings.Split(opt, ":")
-
- // deepcopier:"keyword; without; value;"
- if len(o) == 1 {
- options[o[0]] = ""
- }
-
- // deepcopier:"key:value; anotherkey:anothervalue"
- if len(o) == 2 {
- options[strings.TrimSpace(o[0])] = strings.TrimSpace(o[1])
- }
- }
-
- return options
-}
-
-// getRelatedField returns first matching field.
-func getRelatedField(instance interface{}, name string) (string, TagOptions) {
- var (
- value = reflect.Indirect(reflect.ValueOf(instance))
- fieldName string
- tagOptions TagOptions
- )
-
- for i := 0; i < value.NumField(); i++ {
- var (
- vField = value.Field(i)
- tField = value.Type().Field(i)
- tagOptions = getTagOptions(tField.Tag.Get(TagName))
- )
-
- if tField.Type.Kind() == reflect.Struct && tField.Anonymous {
- if n, o := getRelatedField(vField.Interface(), name); n != "" {
- return n, o
- }
- }
-
- if v, ok := tagOptions[FieldOptionName]; ok && v == name {
- return tField.Name, tagOptions
- }
-
- if tField.Name == name {
- return tField.Name, tagOptions
- }
- }
-
- return fieldName, tagOptions
-}
-
-// getMethodNames returns instance's method names.
-func getMethodNames(instance interface{}) []string {
- var methods []string
-
- t := reflect.TypeOf(instance)
- for i := 0; i < t.NumMethod(); i++ {
- methods = append(methods, t.Method(i).Name)
- }
-
- return methods
-}
-
-// getFieldNames returns instance's field names.
-func getFieldNames(instance interface{}) []string {
- var (
- fields []string
- v = reflect.Indirect(reflect.ValueOf(instance))
- t = v.Type()
- )
-
- if t.Kind() != reflect.Struct {
- return nil
- }
-
- for i := 0; i < v.NumField(); i++ {
- var (
- vField = v.Field(i)
- tField = v.Type().Field(i)
- )
-
- // Is exportable?
- if tField.PkgPath != "" {
- continue
- }
-
- if tField.Type.Kind() == reflect.Struct && tField.Anonymous {
- fields = append(fields, getFieldNames(vField.Interface())...)
- continue
- }
-
- fields = append(fields, tField.Name)
- }
-
- return fields
-}
-
-// isNullableType returns true if the given type is a nullable one.
-func isNullableType(t reflect.Type) bool {
- return t.ConvertibleTo(reflect.TypeOf((*driver.Valuer)(nil)).Elem())
-}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-12-26 19:31:44 +0000