Grails: specify number of digits for integer in domain class

Question

Is there some better way than validators to enforce an integer be exactly, for example, 2 digits?

In my fantasy world I would do something like this:

class FantasyDomainClass{
  Integer[2] twoDigitInteger  //fantasy world knows I mean base 10
}

Maybe BigInteger?

Based on the answers posed, I am considering I may not want an integer as '01' is an acceptable value.

Answer 1

I would go with a custom validator and set it as

class FantasyDomainClass {

Integer twoDigitInteger

static constraints = { 
  twoDigitInteger validator: { 
    return (it.toString().size() <= 2) 
  } 
}