33 lines
694 B
Go
33 lines
694 B
Go
/*
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Copyright 2021 The CloudEvents Authors
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SPDX-License-Identifier: Apache-2.0
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*/
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package expression
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import (
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cesql "github.com/cloudevents/sdk-go/sql/v2"
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"github.com/cloudevents/sdk-go/sql/v2/utils"
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cloudevents "github.com/cloudevents/sdk-go/v2"
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)
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type negateExpression baseUnaryExpression
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func (l negateExpression) Evaluate(event cloudevents.Event) (interface{}, error) {
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val, err := l.child.Evaluate(event)
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if err != nil {
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return int32(0), err
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}
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val, err = utils.Cast(val, cesql.IntegerType)
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if err != nil {
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return int32(0), err
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}
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return -(val.(int32)), nil
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}
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func NewNegateExpression(child cesql.Expression) cesql.Expression {
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return negateExpression{child: child}
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}
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