forked from TrueCloudLab/frostfs-s3-gw
86 lines
1.8 KiB
Go
86 lines
1.8 KiB
Go
|
/*
|
||
|
|
* MinIO Cloud Storage, (C) 2018 MinIO, Inc.
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package condition
|
||
|
|
|
||
|
|
import (
|
||
|
|
"encoding/json"
|
||
|
|
"fmt"
|
||
|
|
)
|
||
|
|
|
||
|
|
// ValueSet - unique list of values.
|
||
|
|
type ValueSet map[Value]struct{}
|
||
|
|
|
||
|
|
// Add - adds given value to value set.
|
||
|
|
func (set ValueSet) Add(value Value) {
|
||
|
|
set[value] = struct{}{}
|
||
|
|
}
|
||
|
|
|
||
|
|
// MarshalJSON - encodes ValueSet to JSON data.
|
||
|
|
func (set ValueSet) MarshalJSON() ([]byte, error) {
|
||
|
|
var values []Value
|
||
|
|
for k := range set {
|
||
|
|
values = append(values, k)
|
||
|
|
}
|
||
|
|
|
||
|
|
if len(values) == 0 {
|
||
|
|
return nil, fmt.Errorf("invalid value set %v", set)
|
||
|
|
}
|
||
|
|
|
||
|
|
return json.Marshal(values)
|
||
|
|
}
|
||
|
|
|
||
|
|
// UnmarshalJSON - decodes JSON data.
|
||
|
|
func (set *ValueSet) UnmarshalJSON(data []byte) error {
|
||
|
|
var v Value
|
||
|
|
if err := json.Unmarshal(data, &v); err == nil {
|
||
|
|
*set = make(ValueSet)
|
||
|
|
set.Add(v)
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
var values []Value
|
||
|
|
if err := json.Unmarshal(data, &values); err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
if len(values) < 1 {
|
||
|
|
return fmt.Errorf("invalid value")
|
||
|
|
}
|
||
|
|
|
||
|
|
*set = make(ValueSet)
|
||
|
|
for _, v = range values {
|
||
|
|
if _, found := (*set)[v]; found {
|
||
|
|
return fmt.Errorf("duplicate value found '%v'", v)
|
||
|
|
}
|
||
|
|
|
||
|
|
set.Add(v)
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// NewValueSet - returns new value set containing given values.
|
||
|
|
func NewValueSet(values ...Value) ValueSet {
|
||
|
|
set := make(ValueSet)
|
||
|
|
|
||
|
|
for _, value := range values {
|
||
|
|
set.Add(value)
|
||
|
|
}
|
||
|
|
|
||
|
|
return set
|
||
|
|
}
|