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tag.go
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tag.go
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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"
"unicode/utf8"
)
// Tag - a tag for a replication configuration Rule filter.
type Tag struct {
XMLName xml.Name `xml:"Tag" json:"Tag"`
Key string `xml:"Key,omitempty" json:"Key,omitempty"`
Value string `xml:"Value,omitempty" json:"Value,omitempty"`
}
var (
errInvalidTagKey = Errorf("The TagKey you have provided is invalid")
errInvalidTagValue = Errorf("The TagValue you have provided is invalid")
)
func (tag Tag) String() string {
return tag.Key + "=" + tag.Value
}
// IsEmpty returns whether this tag is empty or not.
func (tag Tag) IsEmpty() bool {
return tag.Key == ""
}
// Validate checks this tag.
func (tag Tag) Validate() error {
if len(tag.Key) == 0 || utf8.RuneCountInString(tag.Key) > 128 {
return errInvalidTagKey
}
if utf8.RuneCountInString(tag.Value) > 256 {
return errInvalidTagValue
}
return nil
}