mirror of https://github.com/minio/minio.git
74 lines
1.8 KiB
Go
74 lines
1.8 KiB
Go
/*
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* MinIO Cloud Storage, (C) 2019 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package lifecycle
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import (
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"encoding/xml"
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)
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var errDuplicateTagKey = Errorf("Duplicate Tag Keys are not allowed")
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// And - a tag to combine a prefix and multiple tags for lifecycle configuration rule.
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type And struct {
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XMLName xml.Name `xml:"And"`
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Prefix Prefix `xml:"Prefix,omitempty"`
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Tags []Tag `xml:"Tag,omitempty"`
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}
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// isEmpty returns true if Tags field is null
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func (a And) isEmpty() bool {
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return len(a.Tags) == 0 && !a.Prefix.set
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}
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// Validate - validates the And field
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func (a And) Validate() error {
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emptyPrefix := !a.Prefix.set
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emptyTags := len(a.Tags) == 0
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if emptyPrefix && emptyTags {
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return nil
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}
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if emptyPrefix && !emptyTags || !emptyPrefix && emptyTags {
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return errXMLNotWellFormed
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}
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if a.ContainsDuplicateTag() {
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return errDuplicateTagKey
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}
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for _, t := range a.Tags {
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if err := t.Validate(); err != nil {
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return err
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}
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}
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return nil
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}
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// ContainsDuplicateTag - returns true if duplicate keys are present in And
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func (a And) ContainsDuplicateTag() bool {
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x := make(map[string]struct{}, len(a.Tags))
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for _, t := range a.Tags {
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if _, has := x[t.Key]; has {
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return true
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}
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x[t.Key] = struct{}{}
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}
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return false
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}
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