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Copy pathstring.go
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71 lines (60 loc) · 1.79 KB
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Copy pathstring.go
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71 lines (60 loc) · 1.79 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 (
"bytes"
"github.com/gogf/gf/util/gconv"
"sync/atomic"
)
// String is a struct for concurrent-safe operation for type string.
type String struct {
value atomic.Value
}
// NewString creates and returns a concurrent-safe object for string type,
// with given initial value <value>.
func NewString(value ...string) *String {
t := &String{}
if len(value) > 0 {
t.value.Store(value[0])
}
return t
}
// Clone clones and returns a new concurrent-safe object for string type.
func (v *String) Clone() *String {
return NewString(v.Val())
}
// Set atomically stores <value> into t.value and returns the previous value of t.value.
func (v *String) Set(value string) (old string) {
old = v.Val()
v.value.Store(value)
return
}
// Val atomically loads and returns t.value.
func (v *String) Val() string {
s := v.value.Load()
if s != nil {
return s.(string)
}
return ""
}
// String implements String interface for string printing.
func (v *String) String() string {
return v.Val()
}
// MarshalJSON implements the interface MarshalJSON for json.Marshal.
func (v *String) MarshalJSON() ([]byte, error) {
return gconv.UnsafeStrToBytes(`"` + v.Val() + `"`), nil
}
// UnmarshalJSON implements the interface UnmarshalJSON for json.Unmarshal.
func (v *String) UnmarshalJSON(b []byte) error {
v.Set(gconv.UnsafeBytesToStr(bytes.Trim(b, `"`)))
return nil
}
// UnmarshalValue is an interface implement which sets any type of value for <v>.
func (v *String) UnmarshalValue(value interface{}) error {
v.Set(gconv.String(value))
return nil
}