//                                                                           Singleton
    //                                                                           =========
    private static final KeyMatchDbm _instance = new KeyMatchDbm();

    private KeyMatchDbm() {
    }

    public static KeyMatchDbm getInstance() {
        return _instance;
    }

/**
 * KeyMatchHelper is a helper class for KeyMatch feature.
 * It manages KeyMatch instances and provides methods to build queries for boosting documents.
 */
public class KeyMatchHelper extends AbstractConfigHelper {
    private static final Logger logger = LogManager.getLogger(KeyMatchHelper.class);

    /**
     * Default constructor.
     */
    public KeyMatchHelper() {
        super();
    }

    /**

    // Common OIDs used in tests
    private static final ASN1ObjectIdentifier OID_KRB = new ASN1ObjectIdentifier(SpnegoConstants.KERBEROS_MECHANISM);
    private static final ASN1ObjectIdentifier OID_KRB_LEGACY = new ASN1ObjectIdentifier(SpnegoConstants.LEGACY_KERBEROS_MECHANISM);
    private static final ASN1ObjectIdentifier OID_NTLM = new ASN1ObjectIdentifier(SpnegoConstants.NTLMSSP_MECHANISM);

 * has exceeded its lifetime and should be refreshed or reloaded.
 */
public class DictionaryExpiredException extends RuntimeException {

    /** Serial version UID for serialization. */
    private static final long serialVersionUID = 1L;

    /**
     * Creates a new instance of DictionaryExpiredException.
     * This constructor initializes the exception to indicate that a dictionary

 * Typically used when a document or resource is not available during crawling or indexing.
 */
public class ContentNotFoundException extends FessSystemException {

    private static final long serialVersionUID = 1L;

    /**
     * Constructs a new ContentNotFoundException with the specified parent URL and URL.
     *
     * @param parentUrl the URL of the parent document

 * attempting to read beyond the end of a file.
 *
 * @author mbechler
 */
public class SmbEndOfFileException extends SmbException {

    /**
     *
     */
    private static final long serialVersionUID = 298752101881244000L;

    /**
     * Constructs an end-of-file exception.
     */
    public SmbEndOfFileException() {
        super("Unexpectedly reached end of file");
    }

import org.apache.maven.api.annotations.Experimental;

/**
 * Base class for all maven exceptions.
 *
 * @since 4.0.0
 */
@Experimental
public class MavenException extends RuntimeException {

    @Serial
    private static final long serialVersionUID = 9027638326336093132L;

    public MavenException() {}

    public MavenException(String message) {
        super(message);
    }

import org.opensearch.index.IndexSettings;
import org.opensearch.index.analysis.AbstractTokenFilterFactory;

public class KuromojiKatakanaStemmerFactory extends AbstractTokenFilterFactory {

    private final int minimumLength;

    public KuromojiKatakanaStemmerFactory(IndexSettings indexSettings, Environment environment, String name, Settings settings) {
        super(indexSettings, name, settings);

import org.opensearch.search.rescore.QueryRescorerBuilder;
import org.opensearch.search.rescore.RescorerBuilder;

public class QueryRescorerTest extends UnitFessTestCase {

    private QueryRescorer queryRescorer;

    @Override
    public void setUp() throws Exception {
        super.setUp();
    }

    public void test_evaluate_withNullParams() {

    assertDoesntActuallyTrim(iia2);
  }

  private static void assertActuallyTrims(ImmutableDoubleArray iia) {
    ImmutableDoubleArray trimmed = iia.trimmed();
    assertThat(trimmed).isNotSameInstanceAs(iia);

    // Yes, this is apparently how you check array equality in Truth
    assertThat(trimmed.toArray()).isEqualTo(iia.toArray());
  }

  private static void assertDoesntActuallyTrim(ImmutableDoubleArray iia) {