/
intstr.go
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/
intstr.go
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// Copyright 2014 The Kubernetes Authors.
// Copyright 2020-2021 Authors of Cilium
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package intstr
import (
"encoding/json"
"fmt"
"strconv"
)
// IntOrString is a type that can hold an int32 or a string. When used in
// JSON or YAML marshalling and unmarshalling, it produces or consumes the
// inner type. This allows you to have, for example, a JSON field that can
// accept a name or number.
// TODO: Rename to Int32OrString
//
// +protobuf=true
// +protobuf.options.(gogoproto.goproto_stringer)=false
// +k8s:openapi-gen=true
type IntOrString struct {
Type Type `protobuf:"varint,1,opt,name=type,casttype=Type"`
IntVal int32 `protobuf:"varint,2,opt,name=intVal"`
StrVal string `protobuf:"bytes,3,opt,name=strVal"`
}
// Type represents the stored type of IntOrString.
type Type int64
const (
Int Type = iota // The IntOrString holds an int.
String // The IntOrString holds a string.
)
// UnmarshalJSON implements the json.Unmarshaller interface.
func (intstr *IntOrString) UnmarshalJSON(value []byte) error {
if value[0] == '"' {
intstr.Type = String
return json.Unmarshal(value, &intstr.StrVal)
}
intstr.Type = Int
return json.Unmarshal(value, &intstr.IntVal)
}
// String returns the string value, or the Itoa of the int value.
func (intstr *IntOrString) String() string {
if intstr == nil {
return "<nil>"
}
if intstr.Type == String {
return intstr.StrVal
}
return strconv.Itoa(intstr.IntValue())
}
// IntValue returns the IntVal if type Int, or if
// it is a String, will attempt a conversion to int,
// returning 0 if a parsing error occurs.
func (intstr *IntOrString) IntValue() int {
if intstr.Type == String {
i, _ := strconv.Atoi(intstr.StrVal)
return i
}
return int(intstr.IntVal)
}
// MarshalJSON implements the json.Marshaller interface.
func (intstr IntOrString) MarshalJSON() ([]byte, error) {
switch intstr.Type {
case Int:
return json.Marshal(intstr.IntVal)
case String:
return json.Marshal(intstr.StrVal)
default:
return []byte{}, fmt.Errorf("impossible IntOrString.Type")
}
}