private void lookupViewComboAction(ActionEvent e) {
    ObjEntityView fieldLookupView = objEntityViewField.getLookup().getLookupObjEntityView();
    ObjEntityView selectedLookupView = (ObjEntityView) lookupViewCombo.getSelectedItem();

    if (selectedLookupView != fieldLookupView) {
      objEntityViewField.getLookup().setLookupObjEntityView(selectedLookupView);

      dataViewTreeModel.fieldChanged(objEntityViewField);
      dataMapTreeModel.fieldChanged(objEntityViewField);
      fieldsTableModel.fireTableCellUpdated(
          objEntityViewField.getObjEntityView().getIndexOfObjEntityViewField(objEntityViewField),
          4);
    }

    if (selectedLookupView != null) {
      ObjEntityViewField nullField = null;
      java.util.List lookupFields = new ArrayList();
      lookupFields.add(nullField);
      lookupFields.addAll(selectedLookupView.getObjEntityViewFields());

      DefaultComboBoxModel lookupFieldsDefaultModel =
          new DefaultComboBoxModel(lookupFields.toArray());
      lookupFieldCombo.setModel(lookupFieldsDefaultModel);
      ObjEntityViewField fieldLookupField = objEntityViewField.getLookup().getLookupField();
      if (fieldLookupField != null) {
        boolean flagSetSelectedItem = false;
        for (Iterator itr = lookupFields.iterator(); itr.hasNext(); ) {
          ObjEntityViewField field = (ObjEntityViewField) itr.next();
          if ((field != null) && (fieldLookupField.getName().equals(field.getName()))) {
            lookupFieldCombo.setSelectedItem(fieldLookupField);
            flagSetSelectedItem = true;
            break;
          }
        }
        if (!flagSetSelectedItem) {
          lookupFieldCombo.setSelectedIndex(0);
        }
      } else {
        lookupFieldCombo.setSelectedIndex(0);
      }
    } else {
      ObjEntityViewField nullField = null;
      ObjEntityViewField[] fields = new ObjEntityViewField[] {nullField};

      DefaultComboBoxModel fieldsModel = new DefaultComboBoxModel(fields);
      lookupFieldCombo.setModel(fieldsModel);
      lookupFieldCombo.setSelectedIndex(0);
    }
  }
  private void lookupFieldComboAction(ActionEvent e) {
    ObjEntityViewField fieldLookupField = objEntityViewField.getLookup().getLookupField();
    ObjEntityViewField selectedLookupField =
        (ObjEntityViewField) lookupFieldCombo.getSelectedItem();

    if (selectedLookupField != fieldLookupField) {
      objEntityViewField.getLookup().setLookupField(selectedLookupField);

      dataViewTreeModel.fieldChanged(objEntityViewField);
      dataMapTreeModel.fieldChanged(objEntityViewField);
      fieldsTableModel.fireTableCellUpdated(
          objEntityViewField.getObjEntityView().getIndexOfObjEntityViewField(objEntityViewField),
          4);
    }
  }