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package response
import "fmt"
// Class holds sets of Types
type Class int
const (
// All is a meta class encompassing all the classes.
All Class = iota
// Success is a class for a successful response.
Success
// Denial is a class for denying existence (NXDOMAIN, or a nodata: type does not exist)
Denial
// Error is a class for errors, right now defined as not Success and not Denial
Error
)
func (c Class) String() string {
switch c {
case All:
return "all"
case Success:
return "success"
case Denial:
return "denial"
case Error:
return "error"
}
return ""
}
// ClassFromString returns the class from the string s. If not class matches
// the All class and an error are returned
func ClassFromString(s string) (Class, error) {
switch s {
case "all":
return All, nil
case "success":
return Success, nil
case "denial":
return Denial, nil
case "error":
return Error, nil
}
return All, fmt.Errorf("invalid Class: %s", s)
}
// Classify classifies the Type t, it returns its Class.
func Classify(t Type) Class {
switch t {
case NoError, Delegation:
return Success
case NameError, NoData:
return Denial
case OtherError:
fallthrough
default:
return Error
}
}
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