80 lines
2.2 KiB
Go
80 lines
2.2 KiB
Go
/*
|
|
Copyright 2014 The Kubernetes Authors.
|
|
|
|
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 labels
|
|
|
|
import (
|
|
"sort"
|
|
"strings"
|
|
)
|
|
|
|
// Labels allows you to present labels independently from their storage.
|
|
type Labels interface {
|
|
// Has returns whether the provided label exists.
|
|
Has(label string) (exists bool)
|
|
|
|
// Get returns the value for the provided label.
|
|
Get(label string) (value string)
|
|
}
|
|
|
|
// Set is a map of label:value. It implements Labels.
|
|
type Set map[string]string
|
|
|
|
// String returns all labels listed as a human readable string.
|
|
// Conveniently, exactly the format that ParseSelector takes.
|
|
func (ls Set) String() string {
|
|
selector := make([]string, 0, len(ls))
|
|
for key, value := range ls {
|
|
selector = append(selector, key+"="+value)
|
|
}
|
|
// Sort for determinism.
|
|
sort.StringSlice(selector).Sort()
|
|
return strings.Join(selector, ",")
|
|
}
|
|
|
|
// Has returns whether the provided label exists in the map.
|
|
func (ls Set) Has(label string) bool {
|
|
_, exists := ls[label]
|
|
return exists
|
|
}
|
|
|
|
// Get returns the value in the map for the provided label.
|
|
func (ls Set) Get(label string) string {
|
|
return ls[label]
|
|
}
|
|
|
|
// AsSelector converts labels into a selectors.
|
|
func (ls Set) AsSelector() Selector {
|
|
return SelectorFromSet(ls)
|
|
}
|
|
|
|
// AsSelectorPreValidated converts labels into a selector, but
|
|
// assumes that labels are already validated and thus don't
|
|
// preform any validation.
|
|
// According to our measurements this is significantly faster
|
|
// in codepaths that matter at high sccale.
|
|
func (ls Set) AsSelectorPreValidated() Selector {
|
|
return SelectorFromValidatedSet(ls)
|
|
}
|
|
|
|
// FormatLables convert label map into plain string
|
|
func FormatLabels(labelMap map[string]string) string {
|
|
l := Set(labelMap).String()
|
|
if l == "" {
|
|
l = "<none>"
|
|
}
|
|
return l
|
|
}
|