if (XORM_VENDOR_NAME.equals(extension.getVendorName())) {
String key = extension.getKey();
if ("column".equals(key)) {
Column c2 = t.getColumnByName(extension.getValue());
if (c2 == null) {
throw new JDOFatalUserException(I18N.msg("E_no_column", extension.getValue(), t.getName(), jdoClass.getName()));
}
classMapping.setColumn(field.getName(), c2, field.isDefaultFetchGroup());
if (field.getNullValue().equals(JDONullValue.EXCEPTION)) {
// TODO: should this be done here?
c2.setNonNull(true);