CODEWITHSUNDEEP
javarestvalidationconstraintsjavax
Nital
Nital

Reputation: 6084

Credit Card expiry date validation using javax.validation constraints or annotations

I have a REST API that takes credit card information as input and processes it. I am using various javax.validation annotations such as @NotNull for validating the mandatory data.

How can I validate the expiry date on a credit card?

Note: Credit Card expiry date does NOT contain date. It contains only month and year. Example: 12/17 which means that the card is expiring in Dec 2107.

public class CreditCardData {

    @NotNull
    private Long cardNo

    @NotNull
    //WHAT ANNOTATION SHOULD I PUT HERE SO THAT IT IS FUTURE DATE ?????
    //WILL CONTAIN ONLY MON/YY, EXAMPLE: 12/17
    private String expiryDate

}

Upvotes: 0

Views: 1379

Answers (1)

Malt
Malt

Reputation: 30285

I don't know of a ready-made annotation that validates card expirations, but it's quite easy to create your own.

Create your annotation:

@Target({ METHOD, FIELD, PARAMETER })
@Retention(RUNTIME)
@Constraint(validatedBy = CardExpirationValidator.class)
public static @interface CardExpiration {
    String message() default "Expiration invalid";

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default {};
}

Note the javax.validation.Constraint annotation - it says that the CardExpiration annotation is a constraint validated by another class - CardExpirationValidator.class. So let's go ahead and write that class with our validation logic. It's going to be something like this:

public static class CardExpirationValidator implements ConstraintValidator<CardExpiration, String> {
    @Override
    public void initialize(CardExpiration annotation) {
        //Not much to do - this is invoked before "isValid", and can be used to pass annotation parameters
    }

    @Override
    public boolean isValid(String value, ConstraintValidatorContext context) {
        //Insert validation logic for "value" here. Return true/false
    }
}

Now you can annotate parameters and fields like this:

public class CreditCardData {

    @NotNull
    private Long cardNo;

    @NotNull
    @CardExpiration
    private String expiryDate;
}

See Jersey's/JBoss's documentation on the topic.

Upvotes: 3

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