return termsQuery;
    }

    protected IdsQueryBuilder regIdsQ(Collection<String> values) {
        checkEsInvalidQueryCollection("_id", values);
        IdsQueryBuilder idsQuery = QueryBuilders.idsQuery().addIds(values.toArray(new String[values.size()]));
        regQ(idsQuery);
        return idsQuery;
    }

    protected MatchQueryBuilder regMatchQ(String name, Object value) {
        checkEsInvalidQuery(name, value);

        return termsQuery;
    }

    protected IdsQueryBuilder regIdsQ(Collection<String> values) {
        checkEsInvalidQueryCollection("_id", values);
        IdsQueryBuilder idsQuery = QueryBuilders.idsQuery().addIds(values.toArray(new String[values.size()]));
        regQ(idsQuery);
        return idsQuery;
    }

    protected MatchQueryBuilder regMatchQ(String name, Object value) {
        checkEsInvalidQuery(name, value);

        return termsQuery;
    }

    protected IdsQueryBuilder regIdsQ(Collection<String> values) {
        checkEsInvalidQueryCollection("_id", values);
        IdsQueryBuilder idsQuery = QueryBuilders.idsQuery().addIds(values.toArray(new String[values.size()]));
        regQ(idsQuery);
        return idsQuery;
    }

    protected MatchQueryBuilder regMatchQ(String name, Object value) {
        checkEsInvalidQuery(name, value);

        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        return searchEngineClient.getDocument(fessConfig.getIndexDocumentUpdateIndex(), builder -> {
            builder.setQuery(QueryBuilders.idsQuery().addIds(id));
            builder.setFetchSource(fields, null);
            return true;
        }).orElse(null);
    }

    /**
     * Retrieves a list of documents whose IDs start with the specified prefix.

        };
        ComponentUtil.register(client, "searchEngineClient");

        final List<Map<String, Object>> documents =
                indexingHelper.getDocumentListByQuery(client, QueryBuilders.idsQuery().addIds("001"), new String[] { "title", "content" });
        assertEquals("fess.update", resultMap.get("index"));
        assertEquals(

import java.util.stream.IntStream;
import java.util.stream.LongStream;

/**
 * A mutable object which accumulates double values and tracks some basic statistics over all the
 * values added so far. The values may be added singly or in groups. This class is not thread safe.
 *
 * @author Pete Gillin
 * @author Kevin Bourrillion
 * @since 20.0
 */
@J2ktIncompatible
@GwtIncompatible
public final class StatsAccumulator {

 * equivalent elements are added to it, it is undefined which will come first in the output.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
final class TopKSelector<
    T extends @Nullable Object> {

  /**
   * Returns a {@code TopKSelector} that collects the lowest {@code k} elements added to it,

      omitEmptyValues = true;
      return this;
    }

    /**
     * Adds a name/value pair to the formatted output in {@code name=value} format. If {@code value}
     * is {@code null}, the string {@code "null"} is used, unless {@link #omitNullValues()} is
     * called, in which case this name/value pair will not be added.
     */
    @CanIgnoreReturnValue

        return last;
    }

    /**
     * Adds an element at the beginning.
     *
     * @param element the object to be added
     */
    public void addFirst(final E element) {
        header.next.addBefore(element);
    }

    /**
     * Adds an element at the end.
     *
     * @param element the object to be added
     */
    public void addLast(final E element) {

                logger.info("Stopping all crawler.");
            }
            forceStop();
        }
    }

    /**
     * Adds a finished session ID to the cleanup list.
     * This method is thread-safe and adds the session ID to be cleaned up later.
     *
     * @param sessionId the crawler session ID that has finished processing
     */