JSR303 Composite Annotation

Question

I\'ve created a composite annotation that consists of @Digits and @Min

@Digits(integer=12, fraction=0)
@Min(value=0)
@ReportAsSingleViolation
@Documented
@Re         


        

Answer 1

You could make use of @OverridesAnnotation:

@Digits(integer=0, fraction=0)
@Min(value=0)
@ReportAsSingleViolation
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target( { FIELD, METHOD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER })
@Constraint(validatedBy={})
public @interface PositiveInteger {
    String message() default "{positive.int.msg}";
    Class<?>[] groups() default {};
    Class<? extends Payload>[] payload() default {};

    @OverridesAttribute(constraint=Digits.class, name="integer")
    int digits();
}

That way the value given in @PositiveInteger#digits() will be propagated to @Digits.