go.temporal.io/server@v1.23.0/common/predicates/not.go (about) 1 // The MIT License 2 // 3 // Copyright (c) 2020 Temporal Technologies Inc. All rights reserved. 4 // 5 // Copyright (c) 2020 Uber Technologies, Inc. 6 // 7 // Permission is hereby granted, free of charge, to any person obtaining a copy 8 // of this software and associated documentation files (the "Software"), to deal 9 // in the Software without restriction, including without limitation the rights 10 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 // copies of the Software, and to permit persons to whom the Software is 12 // furnished to do so, subject to the following conditions: 13 // 14 // The above copyright notice and this permission notice shall be included in 15 // all copies or substantial portions of the Software. 16 // 17 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 // THE SOFTWARE. 24 25 package predicates 26 27 type ( 28 NotImpl[T any] struct { 29 Predicate Predicate[T] 30 } 31 ) 32 33 func Not[T any]( 34 predicate Predicate[T], 35 ) Predicate[T] { 36 switch p := predicate.(type) { 37 case *NotImpl[T]: 38 return p.Predicate 39 case *UniversalImpl[T]: 40 return Empty[T]() 41 case *EmptyImpl[T]: 42 return Universal[T]() 43 default: 44 return &NotImpl[T]{ 45 Predicate: predicate, 46 } 47 } 48 } 49 50 func (n *NotImpl[T]) Test(t T) bool { 51 return !n.Predicate.Test(t) 52 } 53 54 func (n *NotImpl[T]) Equals( 55 predicate Predicate[T], 56 ) bool { 57 notPredicate, ok := predicate.(*NotImpl[T]) 58 if !ok { 59 return false 60 } 61 return n.Predicate.Equals(notPredicate.Predicate) 62 }