Validate hibernate date as long

Question

I want to validate a date in Long type to be greater than the current time.
I've seen @Past, @Future and so on... but It is not applicable to Long data type.

I'm looking for something like this:

@FutureOrPresent
private Long dateStart;
@Future
private Long dateEnd;

But working for Long values.

How can I validate date > System.currentTimeMillis() ?

Thanks in advance.

Answer 1

In case you want to use existing constraint annotations but the types (Long in your case) on which you want to apply them are not supported you need to:

Create your own implementation of ConstraintValidator, for example:

public class FutureLongValidator implements ConstraintValidator<Future, Long> { 
    public boolean isValid(Long value, ConstraintValidatorContext context) {
        if ( value == null ) {
            return true;
        }
        return value > System.currentTimeMillis();
    }
}

Then register it so that HV knows about it and can use it for validation. There are a few ways how this can be done. I'd suggest using the ServiceLoader approach. To do that a file META-INF/services/javax.validation.ConstraintValidator must be created and the fully qualified name of the validator added to it:

some.package.FutureLongValidator
some.package.FutureOrPresentLongValidator

for a more detailed instructions and a sample project check out this post that covers the topic in details - Adding custom constraint definitions via the Java service loader