kyverno/pkg/engine/validate/common.go

package validate

import (
	"fmt"
	"strconv"
)

// convertNumberToString converts value to string
func convertNumberToString(value interface{}) (string, error) {
	if value == nil {
		return "0", nil
	}

	switch typed := value.(type) {
	case string:
		return string(typed), nil
	case float64:
		return fmt.Sprintf("%f", typed), nil
	case int64:
		return strconv.FormatInt(typed, 10), nil
	case int:
		return strconv.Itoa(typed), nil
	case nil:
		return "", fmt.Errorf("got empty string, expect %v", value)
	default:
		return "", fmt.Errorf("could not convert %v to string", typed)
	}
}