go.temporal.io/server@v1.23.0/common/predicates/not.go (about)

     1  // The MIT License
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     3  // Copyright (c) 2020 Temporal Technologies Inc.  All rights reserved.
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     5  // Copyright (c) 2020 Uber Technologies, Inc.
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    18  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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    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  }