Codigo para Valores Transient en una entidad

...entity code...

@Transient

private int age;

public int getAge() {
  Calendar today = Calendar.getInstance();
  Calendar date_of_birth = Calendar.getInstance();
  date_of_birth.setTime(this.getDateOfBirth());
  int diff_year = today.get(Calendar.YEAR) - date_of_birth.get(Calendar.YEAR);
  int diff_month = today.get(Calendar.MONTH) - date_of_birth.get(Calendar.MONTH);
  int diff_day = today.get(Calendar.DAY_OF_MONTH) - date_of_birth.get(Calendar.DAY_OF_MONTH);
  if (diff_month < 0 || (diff_month == 0 && diff_day < 0)) {
    diff_year = diff_year - 1; //no aparecían los dos guiones del postincremento :|
  }
  return diff_year;
}


...entity code...