/
gtype_string.go
71 lines (60 loc) · 1.76 KB
/
gtype_string.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
// Copyright GoFrame Author(https://goframe.org). 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/v2/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 []byte(`"` + v.Val() + `"`), nil
}
// UnmarshalJSON implements the interface UnmarshalJSON for json.Unmarshal.
func (v *String) UnmarshalJSON(b []byte) error {
v.Set(string(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
}