| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| // Copyright Istio 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 |
| |
| // Collection is a collection of labels used for comparing labels against a |
| // collection of labels |
| type Collection []Instance |
| |
| // HasSubsetOf returns true if the input labels are a super set of one labels in a |
| // collection or if the tag collection is empty |
| func (c Collection) HasSubsetOf(that Instance) bool { |
| if len(c) == 0 { |
| return true |
| } |
| // prevent panic when that is nil |
| if len(that) == 0 { |
| return false |
| } |
| for _, this := range c { |
| if this.SubsetOf(that) { |
| return true |
| } |
| } |
| return false |
| } |
| |
| // IsSupersetOf returns true if the input labels are a subset set of any set of labels in a |
| // collection |
| func (c Collection) IsSupersetOf(that Instance) bool { |
| if len(c) == 0 { |
| return len(that) == 0 |
| } |
| |
| for _, this := range c { |
| if that.SubsetOf(this) { |
| return true |
| } |
| } |
| return false |
| } |