public void process(Data row) {

    Value value1 = row.getValue1();
    Value value2 = row.getValue2();
    boolean saved = false;

    if (   (value1 != null)
        && (relevantValues.contains(value1))
    ) {
        addRow(value1, row, only1collection);
    }

    if (   (value1 != null)
        && (relevantValues.contains(value1))
        && (relevantValues.contains(value2))
    ) {
        addRow(value2, row, values12collection);
    }

    if (relevantValues.contains(value2)) {
        addRow(value2, row, only2collection);
    }

    if (   (value1 != null)
        && (relevantValues.contains(value1))
        || (relevantValues.contains(value2))
    ) {
        repository.save(row);
        stats.increment();
    }
}