vendor/github.com/aws/aws-sdk-go/private/protocol/rest/payload.go

   1 package rest
   2
   3 import "reflect"
   4
   5 // PayloadMember returns the payload field member of i if there is one, or nil.
   6 func PayloadMember(i interface{}) interface{} {
   7         if i == nil {
   8                 return nil
   9         }
  10
  11         v := reflect.ValueOf(i).Elem()
  12         if !v.IsValid() {
  13                 return nil
  14         }
  15         if field, ok := v.Type().FieldByName("_"); ok {
  16                 if payloadName := field.Tag.Get("payload"); payloadName != "" {
  17                         field, _ := v.Type().FieldByName(payloadName)
  18                         if field.Tag.Get("type") != "structure" {
  19                                 return nil
  20                         }
  21
  22                         payload := v.FieldByName(payloadName)
  23                         if payload.IsValid() || (payload.Kind() == reflect.Ptr && !payload.IsNil()) {
  24                                 return payload.Interface()
  25                         }
  26                 }
  27         }
  28         return nil
  29 }
  30
  31 // PayloadType returns the type of a payload field member of i if there is one, or "".
  32 func PayloadType(i interface{}) string {
  33         v := reflect.Indirect(reflect.ValueOf(i))
  34         if !v.IsValid() {
  35                 return ""
  36         }
  37         if field, ok := v.Type().FieldByName("_"); ok {
  38                 if payloadName := field.Tag.Get("payload"); payloadName != "" {
  39                         if member, ok := v.Type().FieldByName(payloadName); ok {
  40                                 return member.Tag.Get("type")
  41                         }
  42                 }
  43         }
  44         return ""
  45 }