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Copy pathinterface.go
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73 lines (62 loc) · 1.91 KB
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// Copyright 2018 gf Author(https://github.com/gogf/gf). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.
package gtype
import (
"encoding/json"
"github.com/gogf/gf/util/gconv"
"sync/atomic"
)
// Interface is a struct for concurrent-safe operation for type interface{}.
type Interface struct {
value atomic.Value
}
// NewInterface creates and returns a concurrent-safe object for interface{} type,
// with given initial value <value>.
func NewInterface(value ...interface{}) *Interface {
t := &Interface{}
if len(value) > 0 && value[0] != nil {
t.value.Store(value[0])
}
return t
}
// Clone clones and returns a new concurrent-safe object for interface{} type.
func (v *Interface) Clone() *Interface {
return NewInterface(v.Val())
}
// Set atomically stores <value> into t.value and returns the previous value of t.value.
// Note: The parameter <value> cannot be nil.
func (v *Interface) Set(value interface{}) (old interface{}) {
old = v.Val()
v.value.Store(value)
return
}
// Val atomically loads and returns t.value.
func (v *Interface) Val() interface{} {
return v.value.Load()
}
// String implements String interface for string printing.
func (v *Interface) String() string {
return gconv.String(v.Val())
}
// MarshalJSON implements the interface MarshalJSON for json.Marshal.
func (v *Interface) MarshalJSON() ([]byte, error) {
return json.Marshal(v.Val())
}
// UnmarshalJSON implements the interface UnmarshalJSON for json.Unmarshal.
func (v *Interface) UnmarshalJSON(b []byte) error {
var i interface{}
err := json.Unmarshal(b, &i)
if err != nil {
return err
}
v.Set(i)
return nil
}
// UnmarshalValue is an interface implement which sets any type of value for <v>.
func (v *Interface) UnmarshalValue(value interface{}) error {
v.Set(value)
return nil
}