title: How to tell Hibernate to not update certain columns
body: <p>I have an application that will give a user an opportunity to update certain values.  I want to send just the info on those columns to the user and take updates.</p>
  
  <p>I'd like to persist a hibernate entity created from what they send to me, but not update the columns that the user does not have access to.  Likewise, if they request a new entry, I want to use the data they send me and set the unmentioned columns to the databases defaults.</p>
  
  <p>Is there an easy way or best practice to use?  </p>
  
  <p>Should I create a second mapping to the table that just doesn't mention those columns?</p>