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types.go
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/
types.go
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package servergroups
import (
"encoding/json"
"fmt"
)
type ServerGroupPolicy string
const (
AffinityPolicy ServerGroupPolicy = "affinity"
AntiAffinityPolicy ServerGroupPolicy = "anti-affinity"
)
func (s ServerGroupPolicy) String() string {
return string(s)
}
func (s ServerGroupPolicy) List() []ServerGroupPolicy {
return []ServerGroupPolicy{AffinityPolicy, AntiAffinityPolicy}
}
func (s ServerGroupPolicy) StringList() []string {
lst := s.List()
strings := make([]string, 0, len(lst))
for _, x := range lst {
strings = append(strings, x.String())
}
return strings
}
func (s ServerGroupPolicy) IsValid() error {
switch s {
case AffinityPolicy, AntiAffinityPolicy:
return nil
}
return fmt.Errorf("invalid ServerGroupPolicy type: %v", s)
}
func (s ServerGroupPolicy) ValidOrNil() (*ServerGroupPolicy, error) {
if s.String() == "" {
return nil, nil
}
err := s.IsValid()
if err != nil {
return &s, err
}
return &s, nil
}
// UnmarshalJSON - implements Unmarshaler interface for ServerGroupPolicy.
func (s *ServerGroupPolicy) UnmarshalJSON(data []byte) error {
var sg string
if err := json.Unmarshal(data, &sg); err != nil {
return err
}
v := ServerGroupPolicy(sg)
err := v.IsValid()
if err != nil {
return err
}
*s = v
return nil
}
// MarshalJSON - implements Marshaler interface for ServerGroupPolicy.
func (s *ServerGroupPolicy) MarshalJSON() ([]byte, error) {
return json.Marshal(s.String())
}