/**
 * Options that are "layered" by precedence order.
 *
 * @param <O> The type of options.
 */
public abstract class LayeredOptions<O extends Options> implements Options {
    protected final List<O> options;

    protected LayeredOptions(List<O> options) {
        this.options = new ArrayList<>(options);
    }

    @Override
    public Optional<Map<String, String>> userProperties() {

 * @author shinsuke
 *
 */
public class RobotsTxtHelper {

    protected static final Pattern USER_AGENT_RECORD =
            Pattern.compile("^user-agent:\\s*([^\\t\\n\\x0B\\f\\r]+)\\s*$", Pattern.CASE_INSENSITIVE);

    protected static final Pattern DISALLOW_RECORD = Pattern.compile("^disallow:\\s*([^\\s]*)\\s*$", Pattern.CASE_INSENSITIVE);

  }

  protected final K k0() {
    return e0().getKey();
  }

  protected final V v0() {
    return e0().getValue();
  }

  protected final K k1() {
    return e1().getKey();
  }

  protected final V v1() {
    return e1().getValue();
  }

  protected final K k2() {
    return e2().getKey();
  }

public abstract class EsAbstractConditionAggregation {

    protected static final String CA_PROPERTY = "conditionAggregation";

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========

public abstract class EsAbstractConditionAggregation {

    protected static final String CA_PROPERTY = "conditionAggregation";

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========

    abstract protected String getListEndpointSuffix();

    abstract protected String getItemEndpointSuffix();

    abstract protected Map<String, Object> createTestParam(int id);

    abstract protected Map<String, Object> getUpdateMap();

    // ================
    // Constant
    // ================
    protected String getIdKey() {
        return "id";
    }

    @BeforeAll
    protected static void initAll() {

import org.opensearch.index.query.QueryBuilders;

public class IndexingHelper {
    private static final Logger logger = LogManager.getLogger(IndexingHelper.class);

    protected int maxRetryCount = 5;

    protected int defaultRowSize = 100;

    protected long requestInterval = 500;

    public void sendDocuments(final SearchEngineClient searchEngineClient, final DocList docList) {
        if (docList.isEmpty()) {

public class PrefixQueryCommand extends QueryCommand {
    private static final Logger logger = LogManager.getLogger(PrefixQueryCommand.class);

    protected boolean lowercaseWildcard = true;

    @Override
    protected String getQueryClassName() {
        return PrefixQuery.class.getSimpleName();
    }

    @Override

    }


    @Override
    protected int writeDataWireFormat ( byte[] dst, int dstIndex ) {
        return 0;
    }


    @Override
    protected int readSetupWireFormat ( byte[] buffer, int bufferIndex, int len ) {
        return 0;
    }


    @Override
    protected int readParametersWireFormat ( byte[] buffer, int bufferIndex, int len ) {
        return 0;

public abstract class EsAbstractConditionAggregation {

    protected static final String CA_PROPERTY = "conditionAggregation";

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========