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path: root/Godeps/_workspace/src/github.com/awslabs/aws-sdk-go/internal/protocol/rest/payload.go
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package rest

import "reflect"

func PayloadMember(i interface{}) interface{} {
	if i == nil {
		return nil
	}

	v := reflect.ValueOf(i).Elem()
	if !v.IsValid() {
		return nil
	}
	if field, ok := v.Type().FieldByName("SDKShapeTraits"); ok {
		if payloadName := field.Tag.Get("payload"); payloadName != "" {
			field, _ := v.Type().FieldByName(payloadName)
			if field.Tag.Get("type") != "structure" {
				return nil
			}

			payload := v.FieldByName(payloadName)
			if payload.IsValid() || (payload.Kind() == reflect.Ptr && !payload.IsNil()) {
				return payload.Interface()
			}
		}
	}
	return nil
}

func PayloadType(i interface{}) string {
	v := reflect.Indirect(reflect.ValueOf(i))
	if !v.IsValid() {
		return ""
	}
	if field, ok := v.Type().FieldByName("SDKShapeTraits"); ok {
		if payloadName := field.Tag.Get("payload"); payloadName != "" {
			if member, ok := v.Type().FieldByName(payloadName); ok {
				return member.Tag.Get("type")
			}
		}
	}
	return ""
}