[EXTVal] Validators wihtout implicit required validations

[Dreher, Markus]

Hi all,

i want to validate a field only when the user filled it out.

It's not a reuqired field, but when it is filled out, the input should
be at least for example 3 digits.

    @Length(minimum=3, maximum = 60)
    private String input;

With @Length this leads to a required field.

Do i miss something?

Regards,

Markus