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81 lines
1.9 KiB
81 lines
1.9 KiB
// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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package gtype
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import (
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"bytes"
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"sync/atomic"
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"github.com/gogf/gf/v2/util/gconv"
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)
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// String is a struct for concurrent-safe operation for type string.
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type String struct {
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value atomic.Value
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}
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// NewString creates and returns a concurrent-safe object for string type,
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// with given initial value `value`.
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func NewString(value ...string) *String {
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t := &String{}
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if len(value) > 0 {
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t.value.Store(value[0])
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}
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return t
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}
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// Clone clones and returns a new concurrent-safe object for string type.
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func (v *String) Clone() *String {
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return NewString(v.Val())
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}
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// Set atomically stores `value` into t.value and returns the previous value of t.value.
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func (v *String) Set(value string) (old string) {
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old = v.Val()
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v.value.Store(value)
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return
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}
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// Val atomically loads and returns t.value.
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func (v *String) Val() string {
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s := v.value.Load()
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if s != nil {
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return s.(string)
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}
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return ""
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}
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// String implements String interface for string printing.
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func (v *String) String() string {
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return v.Val()
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}
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// MarshalJSON implements the interface MarshalJSON for json.Marshal.
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func (v String) MarshalJSON() ([]byte, error) {
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return []byte(`"` + v.Val() + `"`), nil
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}
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// UnmarshalJSON implements the interface UnmarshalJSON for json.Unmarshal.
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func (v *String) UnmarshalJSON(b []byte) error {
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v.Set(string(bytes.Trim(b, `"`)))
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return nil
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}
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// UnmarshalValue is an interface implement which sets any type of value for `v`.
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func (v *String) UnmarshalValue(value interface{}) error {
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v.Set(gconv.String(value))
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return nil
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}
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// DeepCopy implements interface for deep copy of current type.
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func (v *String) DeepCopy() interface{} {
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if v == nil {
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return nil
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}
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return NewString(v.Val())
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}
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