frostfs-api-go/pkg/container/attribute.go
Pavel Karpy 0206bd9a5d [#302] pkg/container: Convert nil Attributes to nil message
Make `Attributes.ToV2` method to return `nil`
when called on `nil`. Make `NewAttributesFromV2`
function to return `nil` when called on `nil`.
Write corresponding unit tests.

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
2021-06-09 17:23:35 +03:00

76 lines
1.5 KiB
Go

package container
import (
"github.com/nspcc-dev/neofs-api-go/v2/container"
)
type (
Attribute container.Attribute
Attributes []*Attribute
)
// NewAttribute creates and initializes blank Attribute.
//
// Defaults:
// - key: "";
// - value: "".
func NewAttribute() *Attribute {
return NewAttributeFromV2(new(container.Attribute))
}
func (a *Attribute) SetKey(v string) {
(*container.Attribute)(a).SetKey(v)
}
func (a *Attribute) SetValue(v string) {
(*container.Attribute)(a).SetValue(v)
}
func (a *Attribute) Key() string {
return (*container.Attribute)(a).GetKey()
}
func (a *Attribute) Value() string {
return (*container.Attribute)(a).GetValue()
}
// NewAttributeFromV2 wraps protocol dependent version of
// Attribute message.
//
// Nil container.Attribute converts to nil.
func NewAttributeFromV2(v *container.Attribute) *Attribute {
return (*Attribute)(v)
}
// ToV2 converts Attribute to v2 Attribute message.
//
// Nil Attribute converts to nil.
func (a *Attribute) ToV2() *container.Attribute {
return (*container.Attribute)(a)
}
func NewAttributesFromV2(v []*container.Attribute) Attributes {
if v == nil {
return nil
}
attrs := make(Attributes, 0, len(v))
for i := range v {
attrs = append(attrs, NewAttributeFromV2(v[i]))
}
return attrs
}
func (a Attributes) ToV2() []*container.Attribute {
if a == nil {
return nil
}
attrs := make([]*container.Attribute, 0, len(a))
for i := range a {
attrs = append(attrs, a[i].ToV2())
}
return attrs
}