57 lines
1.1 KiB
Go
57 lines
1.1 KiB
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 equalExpression struct {
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baseBinaryExpression
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equal bool
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}
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func (s equalExpression) Evaluate(event cloudevents.Event) (interface{}, error) {
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leftVal, err := s.left.Evaluate(event)
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if err != nil {
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return false, err
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}
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rightVal, err := s.right.Evaluate(event)
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if err != nil {
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return false, err
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}
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leftVal, err = utils.Cast(leftVal, cesql.TypeFromVal(rightVal))
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if err != nil {
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return false, err
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}
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return (leftVal == rightVal) == s.equal, nil
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}
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func NewEqualExpression(left cesql.Expression, right cesql.Expression) cesql.Expression {
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return equalExpression{
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baseBinaryExpression: baseBinaryExpression{
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left: left,
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right: right,
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},
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equal: true,
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}
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}
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func NewNotEqualExpression(left cesql.Expression, right cesql.Expression) cesql.Expression {
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return equalExpression{
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baseBinaryExpression: baseBinaryExpression{
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left: left,
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right: right,
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},
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equal: false,
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}
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}
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