* during the crawling process.</p>
 */
public class FileListIndexUpdateCallbackImpl implements IndexUpdateCallback {

    /** Logger for this class. */
    private static final Logger logger = LogManager.getLogger(FileListIndexUpdateCallbackImpl.class);

    /**
     * The key used to specify the pattern for excluding URLs.

public class FileListIndexUpdateCallbackImplTest extends UnitFessTestCase {
    public FileListIndexUpdateCallbackImpl indexUpdateCallback;

    @Override
    public void setUp() throws Exception {
        super.setUp();
        indexUpdateCallback = new FileListIndexUpdateCallbackImpl(null, null, 1);
    }

    /** Case 1: Normal merge (no duplicates) */