/
json.go
74 lines (64 loc) · 1.64 KB
/
json.go
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// Copyright 2023 Liuxiangchao iwind.liu@gmail.com. All rights reserved. Official site: https://goedge.cn .
package utils
import (
"encoding/json"
"errors"
"reflect"
)
// JSONClone 使用JSON协议克隆对象
func JSONClone[T any](ptr T) (newPtr T, err error) {
var ptrType = reflect.TypeOf(ptr)
var kind = ptrType.Kind()
if kind != reflect.Ptr && kind != reflect.Slice {
err = errors.New("JSONClone: input must be a ptr or slice")
return
}
var jsonData []byte
jsonData, err = json.Marshal(ptr)
if err != nil {
return ptr, errors.New("JSONClone: marshal failed: " + err.Error())
}
var newValue any
switch kind {
case reflect.Ptr:
newValue = reflect.New(ptrType.Elem()).Interface()
case reflect.Slice:
newValue = reflect.New(reflect.SliceOf(ptrType.Elem())).Interface()
default:
return ptr, errors.New("JSONClone: unknown data type")
}
err = json.Unmarshal(jsonData, newValue)
if err != nil {
err = errors.New("JSONClone: unmarshal failed: " + err.Error())
return
}
if kind == reflect.Slice {
newValue = reflect.Indirect(reflect.ValueOf(newValue)).Interface()
}
return newValue.(T), nil
}
// JSONDecodeConfig 解码并重新编码
// 是为了去除原有JSON中不需要的数据
func JSONDecodeConfig(data []byte, ptr any) (encodeJSON []byte, err error) {
err = json.Unmarshal(data, ptr)
if err != nil {
return
}
encodeJSON, err = json.Marshal(ptr)
if err != nil {
return
}
// validate config
if ptr != nil {
config, ok := ptr.(interface {
Init() error
})
if ok {
initErr := config.Init()
if initErr != nil {
err = errors.New("validate config failed: " + initErr.Error())
}
}
}
return
}