Create Validator wrapper tag

Question

I created the custom validator tag which wrap @Pattern.

Here,

@Pattern(regexp = "～")
@Target({ ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER })
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = {})
public @interface CustomConstraint {

    String message() default "";
    Class[] groups() default {};
    Class[] payload() default {};
}

But, this tag has the problem which cannot set the attribute of "message". How I set the attribute of "message"?

Answer 1

What you are looking for is @OverridesAttribute:

@Pattern(regexp = "～")
@Target({ ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER })
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = {})
public @interface CustomConstraint {

    String message() default "";
    Class[] groups() default {};
    Class[] payload() default {};

    @OverridesAttribute(constraint = Pattern.class, name = "message")
    String patternMessage() default "";
}