public void process(Data row) {

    Value value1 = row.getValue1();
    Value value2 = row.getValue2();

    Boolian relevant1 =
        (  (value1 != null)
        && (relevantValues.contains(value1))
    );

    Boolian relevant2 = (relevantValues.contains(value2));

    if (relevant1) {
        addRow(value1, row, only1collection);
    }

    if (relevant1 && relevant2) {
        addRow(value2, row, values12collection);
    }

    if (relevant2) {
        addRow(value2, row, only2collection);
    }

    if (relevant1 || relevant2) {
        store.update(row);
    }
}