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ackind.go 980 Bytes
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Yifan Gu 提交于 2015-04-27 18:12 . Godep: Add godep for rkt.
package types
import (
"encoding/json"
"fmt"
)
var (
ErrNoACKind = ACKindError("ACKind must be set")
)
// ACKind wraps a string to define a field which must be set with one of
// several ACKind values. If it is unset, or has an invalid value, the field
// will refuse to marshal/unmarshal.
type ACKind string
func (a ACKind) String() string {
return string(a)
}
func (a ACKind) assertValid() error {
s := a.String()
switch s {
case "ImageManifest", "PodManifest":
return nil
case "":
return ErrNoACKind
default:
msg := fmt.Sprintf("bad ACKind: %s", s)
return ACKindError(msg)
}
}
func (a ACKind) MarshalJSON() ([]byte, error) {
if err := a.assertValid(); err != nil {
return nil, err
}
return json.Marshal(a.String())
}
func (a *ACKind) UnmarshalJSON(data []byte) error {
var s string
err := json.Unmarshal(data, &s)
if err != nil {
return err
}
na := ACKind(s)
if err := na.assertValid(); err != nil {
return err
}
*a = na
return nil
}
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