sslobodr | d046be8 | 2019-01-16 10:02:22 -0500 | [diff] [blame] | 1 | /* |
| 2 | Copyright 2016 The Kubernetes Authors. |
| 3 | |
| 4 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | you may not use this file except in compliance with the License. |
| 6 | You may obtain a copy of the License at |
| 7 | |
| 8 | http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | |
| 10 | Unless required by applicable law or agreed to in writing, software |
| 11 | distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | See the License for the specific language governing permissions and |
| 14 | limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package v1 |
| 18 | |
| 19 | // Clones the given selector and returns a new selector with the given key and value added. |
| 20 | // Returns the given selector, if labelKey is empty. |
| 21 | func CloneSelectorAndAddLabel(selector *LabelSelector, labelKey, labelValue string) *LabelSelector { |
| 22 | if labelKey == "" { |
| 23 | // Don't need to add a label. |
| 24 | return selector |
| 25 | } |
| 26 | |
| 27 | // Clone. |
| 28 | newSelector := selector.DeepCopy() |
| 29 | |
| 30 | if newSelector.MatchLabels == nil { |
| 31 | newSelector.MatchLabels = make(map[string]string) |
| 32 | } |
| 33 | |
| 34 | newSelector.MatchLabels[labelKey] = labelValue |
| 35 | |
| 36 | return newSelector |
| 37 | } |
| 38 | |
| 39 | // AddLabelToSelector returns a selector with the given key and value added to the given selector's MatchLabels. |
| 40 | func AddLabelToSelector(selector *LabelSelector, labelKey, labelValue string) *LabelSelector { |
| 41 | if labelKey == "" { |
| 42 | // Don't need to add a label. |
| 43 | return selector |
| 44 | } |
| 45 | if selector.MatchLabels == nil { |
| 46 | selector.MatchLabels = make(map[string]string) |
| 47 | } |
| 48 | selector.MatchLabels[labelKey] = labelValue |
| 49 | return selector |
| 50 | } |
| 51 | |
| 52 | // SelectorHasLabel checks if the given selector contains the given label key in its MatchLabels |
| 53 | func SelectorHasLabel(selector *LabelSelector, labelKey string) bool { |
| 54 | return len(selector.MatchLabels[labelKey]) > 0 |
| 55 | } |