forked from cilium/cilium
/
array.go
131 lines (117 loc) · 3.35 KB
/
array.go
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// Copyright 2016-2017 Authors of Cilium
//
// 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
// LabelArray is an array of labels forming a set
type LabelArray []*Label
// ParseLabelArray parses a list of labels and returns a LabelArray
func ParseLabelArray(labels ...string) LabelArray {
array := make([]*Label, len(labels))
for i := range labels {
array[i] = ParseLabel(labels[i])
}
return array
}
// ParseSelectLabelArray parses a list of select labels and returns a LabelArray
func ParseSelectLabelArray(labels ...string) LabelArray {
array := make([]*Label, len(labels))
for i := range labels {
array[i] = ParseSelectLabel(labels[i])
}
return array
}
// ParseLabelArrayFromArray converts an array of strings as labels and returns a LabelArray
func ParseLabelArrayFromArray(base []string) LabelArray {
array := make([]*Label, len(base))
for i := range base {
array[i] = ParseLabel(base[i])
}
return array
}
// ParseSelectLabelArrayFromArray converts an array of strings as select labels and returns a LabelArray
func ParseSelectLabelArrayFromArray(base []string) LabelArray {
array := make([]*Label, len(base))
for i := range base {
array[i] = ParseSelectLabel(base[i])
}
return array
}
// Contains returns true if all ls contains all the labels in needed. If
// needed contains no labels, Contains() will always return true
func (ls LabelArray) Contains(needed LabelArray) bool {
nextLabel:
for _, neededLabel := range needed {
for _, l := range ls {
if neededLabel.Matches(l) {
continue nextLabel
}
}
return false
}
return true
}
// Lacks is identical to Contains but returns all missing labels
func (ls LabelArray) Lacks(needed LabelArray) LabelArray {
missing := LabelArray{}
nextLabel:
for _, neededLabel := range needed {
for _, l := range ls {
if neededLabel.Matches(l) {
continue nextLabel
}
}
missing = append(missing, neededLabel)
}
return missing
}
// Has returns whether the provided key exists.
// Implementation of the k8s.io/apimachinery/pkg/labels.Labels interface.
func (ls LabelArray) Has(key string) bool {
// The key is submitted in the form of `source.key=value`
ck := GetCiliumKeyFrom(key)
keyLabel := ParseLabel(ck)
if keyLabel.IsAnySource() {
for _, lsl := range ls {
if lsl.Key == keyLabel.Key {
return true
}
}
} else {
for _, lsl := range ls {
if lsl.GetExtendedKey() == key {
return true
}
}
}
return false
}
// Get returns the value for the provided key.
// Implementation of the k8s.io/apimachinery/pkg/labels.Labels interface.
func (ls LabelArray) Get(key string) string {
ck := GetCiliumKeyFrom(key)
keyLabel := ParseLabel(ck)
if keyLabel.IsAnySource() {
for _, lsl := range ls {
if lsl.Key == keyLabel.Key {
return lsl.Value
}
}
} else {
for _, lsl := range ls {
if lsl.GetExtendedKey() == key {
return lsl.Value
}
}
}
return ""
}