title: Design patern for autocomputed fields and user entered values
body: <p>In a  custom made J2EE framework it use a dynamic computation concept where few fields are derived and values are computed on the go and saved to the database. </p>
  
  <p>If the user modifies the field that is computed by reentering its value, that field should not be auto computed from now on.</p>
  
  <p>Is there a Design pattern that can help me.</p>
  
  <p>There are already domain POJO classes that are there. Please let me know if the question is too abstract.</p>