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/*
* MinIO Cloud Storage, (C) 2020 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 replication
import (
"encoding/xml"
)
// And - a tag to combine a prefix and multiple tags for replication configuration rule.
type And struct {
XMLName xml.Name `xml:"And" json:"And"`
Prefix string `xml:"Prefix,omitempty" json:"Prefix,omitempty"`
Tags []Tag `xml:"Tag,omitempty" json:"Tag,omitempty"`
}
var errDuplicateTagKey = Errorf("Duplicate Tag Keys are not allowed")
// isEmpty returns true if Tags field is null
func (a And) isEmpty() bool {
return len(a.Tags) == 0 && a.Prefix == ""
}
// Validate - validates the And field
func (a And) Validate() error {
if a.ContainsDuplicateTag() {
return errDuplicateTagKey
}
for _, t := range a.Tags {
if err := t.Validate(); err != nil {
return err
}
}
return nil
}
// ContainsDuplicateTag - returns true if duplicate keys are present in And
func (a And) ContainsDuplicateTag() bool {
x := make(map[string]struct{}, len(a.Tags))
for _, t := range a.Tags {
if _, has := x[t.Key]; has {
return true
}
x[t.Key] = struct{}{}
}
return false
}