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// Copyright 2022 The OpenZipkin Authors
//
// 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 model
import (
"fmt"
"strconv"
)
// ID type
type ID uint64
// String outputs the 64-bit ID as hex string.
func (i ID) String() string {
return fmt.Sprintf("%016x", uint64(i))
}
// MarshalJSON serializes an ID type (SpanID, ParentSpanID) to HEX.
func (i ID) MarshalJSON() ([]byte, error) {
return []byte(fmt.Sprintf("%q", i.String())), nil
}
// UnmarshalJSON deserializes an ID type (SpanID, ParentSpanID) from HEX.
func (i *ID) UnmarshalJSON(b []byte) (err error) {
var id uint64
if len(b) < 3 {
return nil
}
id, err = strconv.ParseUint(string(b[1:len(b)-1]), 16, 64)
*i = ID(id)
return err
}
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