Here is an ability to arrange multiple constraints into the single constraint such as below:
@NotNull
@Size(min = 2, max = 14)
@CheckCase(CaseMode.UPPER)
@Target({ METHOD, FIELD, ANNOTATION_TYPE })
@Retention(RUNTIME)
@Constraint(validatedBy = { })
@Documented
public @interface ValidLicensePlate {
String message() default "{org.hibernate.validator.referenceguide.chapter06." +
"constraintcomposition.ValidLicensePlate.message}";
Class<?>[] groups() default { };
Class<? extends Payload>[] payload() default { };
}
In this case annotations @NotNull, @Size and @CheckCase will be processed as a single @ValidLicensePlate constraint. But the execution order of @NotNull, @Size and @CheckCase annotations can not be defined and sometimes it breaks validator by throwing exception.
I've found that this bug is inside of a constructor of the org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree class.
Child constraints can be sorted by groups such top level constraints.
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