Listing 1

public void ejbLoad() {
  ItemKey myKey =
         (ItemKey) getEntityContext().getPrimaryKey();
  Integer newKey1 = myKey.getData1Key();
  Integer newKey2 = myKey.getData2Key();

  if (!(itemData1Key.equals(newKey1))) {
    itemData1 = null;
    itemData1Key = newKey1;
  }

  if (!(itemData2Key.equals(newKey2))) {
    itemData2 = null;
    itemData2Key = newKey2;
  }
}