forked from tikv/pd
/
jsonutil.go
49 lines (44 loc) · 1.5 KB
/
jsonutil.go
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// Copyright 2022 TiKV Project 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 jsonutil
import (
"bytes"
"encoding/json"
"github.com/tikv/pd/pkg/reflectutil"
)
// AddKeyValue is used to add a key value pair into `old`
func AddKeyValue(old interface{}, key string, value interface{}) (updated bool, found bool, err error) {
data, err := json.Marshal(map[string]interface{}{key: value})
if err != nil {
return false, false, err
}
return MergeJSONObject(old, data)
}
// MergeJSONObject is used to merge a marshaled json object into v
func MergeJSONObject(v interface{}, data []byte) (updated bool, found bool, err error) {
old, _ := json.Marshal(v)
if err := json.Unmarshal(data, v); err != nil {
return false, false, err
}
new, _ := json.Marshal(v)
if !bytes.Equal(old, new) {
return true, true, nil
}
m := make(map[string]interface{})
if err := json.Unmarshal(data, &m); err != nil {
return false, false, err
}
found = reflectutil.FindSameFieldByJSON(v, m)
return false, found, nil
}