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binaries.go
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binaries.go
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/**
* @license
* Copyright 2020 Dynatrace LLC
*
* 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 settings
import (
"encoding/json"
"reflect"
)
type Loader interface {
Load(data []byte) error
}
type Storer interface {
Store() ([]byte, error)
}
func ToJSON[T Settings](v T) ([]byte, error) {
if storer, ok := any(v).(Storer); ok {
return storer.Store()
}
scopeField, scopeTag := getScopeField(v)
if scopeField.IsValid() {
var data []byte
var err error
if data, err = json.Marshal(v); err != nil {
return nil, err
}
m := map[string]json.RawMessage{}
if err = json.Unmarshal(data, &m); err != nil {
return nil, err
}
scope := GetScope(v)
if data, err = json.Marshal(scope); err != nil {
return nil, err
}
m[scopeTag] = data
return json.MarshalIndent(m, "", " ")
}
return json.Marshal(v)
}
func FromJSON[T Settings](data []byte, v T) error {
if loader, ok := any(v).(Loader); ok {
return loader.Load(data)
}
scopeField, scopeTag := getScopeField(v)
if scopeField.IsValid() {
if err := json.Unmarshal(data, &v); err != nil {
return err
}
m := map[string]any{}
if err := json.Unmarshal(data, &m); err != nil {
return err
}
if scope, found := m[scopeTag]; found {
SetScope(v, scope.(string))
}
return nil
}
return json.Unmarshal(data, v)
}
func Clone[T Settings](v T) (T, error) {
var err error
var data []byte
var proto T
clone := reflect.New(reflect.ValueOf(proto).Type().Elem()).Interface().(T)
if data, err = ToJSON(v); err != nil {
return clone, err
}
if err = FromJSON(data, clone); err != nil {
return clone, err
}
return clone, nil
}