CODEWITHSUNDEEP
javaspring-bootdrools
Vivek
Vivek

Reputation: 75

Variables can not be used inside bindings

I have a validation function that return which part is failing. For example -

public class DateValidator{
    public String validateDate(startDate, endDate){
        try{
            LocalDate.parse(startDate, formatter);
            LocalDate.parse(endDate, formatter);
        } catch(DateTimeParseException e) {
            return "INVALID_DATE_FORMAT";
        }
        if (startDate.isAfter(endDate)) {
            return "INVALID_START_AND_END_DATES";
        }
    ..... so on
    }
}

I want to use the this in Drools for Validation as 

rule
    "ValidateDate"
when
    $error: Error();
    $request: Request();
    DateValidator( $dateValidation: validateDate($request.getStartDate(), $request.getEndDate()) != null);
then
    $error.getBadRequest($dateValidation);
end;

I want to use the return type of the variable as not null means the validation did not passed. But I am getting below exception for the DRL file -

text=Variables can not be used inside bindings.
Variable [$request] is being used in binding 
'validateDate($request.getStartDate(), $request.getEndDate())']

Upvotes: 1

Views: 867

Answers (1)

Esteban Aliverti
Esteban Aliverti

Reputation: 6322

Try to execute the function call as part of a from Conditional Element:

rule
    "ValidateDate"
when
    $error: Error();
    $request: Request(
      $startDate: startDate,
      $endDate: endDate
    );
    $dv: DateValidator()
    $msg: String() from $dv.validateDate($startDate, $endDate)
then
    $error.getBadRequest($msg);
end

Hope it helps,

Upvotes: 4

Related Questions