[FIXED] Custom JPA Bean Validator with parameters similiar to @Size

Issue

I am looking to implement a JPA Bean Validator for a Annotation similiar to the @Size Annotation, so allowing parameters min and max on the annotation. I have been looking through the documentation and various examples but couldn't find an implementation that would allow multiple parameters on the Annotation.

Currently my code looks like this

@Target({ FIELD, METHOD, PARAMETER, ANNOTATION_TYPE })
@Retention(RUNTIME)
@Constraint(validatedBy = CapacityImpl.class)
public @interface Capacity {

    String message() default "Capacity not in valid Range";

    // Required by validation runtime
    Class<?>[] groups() default { };
    Class<? extends Payload>[] payload() default { };

}

The final Annotation should look like this @Capacity(min=19, max=40)

public class CapacityImpl implements ConstraintValidator<Capacity, Integer> {
    @Override
    public void initialize(Capacity capacity) {

    }

    @Override
    public boolean isValid(Integer integer, ConstraintValidatorContext constraintValidatorContext) {
        return false;
    }
}

So my question is how do I have to change this interface and class to actually allow the parameters min and max on the Annotation, so that I then can validate the value of the field with those paramter values

Solution

Just add them to your annotation definition:

public @interface Capacity {

    String message() default "Capacity not in valid Range";

    // Required by validation runtime
    Class<?>[] groups() default { };
    Class<? extends Payload>[] payload() default { };

    int min();
    int max();
}

Answered By - john16384
Answer Checked By - Katrina (JavaFixing Volunteer)