}

    private void setupMockComponents(final List<Map<String, Object>> documents) {
        final SearchEngineClient searchEngineClient = new SearchEngineClient() {
            @Override
            public long scrollSearch(final String index, final SearchCondition<org.opensearch.action.search.SearchRequestBuilder> condition,
                    final BooleanFunction<Map<String, Object>> cursor) {
                long count = 0;

 * Centralizes scroll logic to reduce code duplication across settings and indexer classes.
 *
 * <p>This class provides methods to perform scroll-based searches with different processing patterns:
 * <ul>
 * <li>{@link #scrollSearch(Client, SuggestSettings, String, QueryBuilder, int, HitProcessor)} - Collects results into a list</li>

     */
    public static long scroll(final String index, final Function<SearchHit, Boolean> callback) {
        final SearchEngineClient client = ComponentUtil.getSearchEngineClient();
        return client.<SearchHit> scrollSearch(index, searchRequestBuilder -> true, (searchResponse, hit) -> hit,
                hit -> callback.apply(hit));
    }

    /**

     * @param cursor Function to process each document in the result set
     * @param userBean Optional user information for permission checking
     * @return Total number of documents processed
     */
    public long scrollSearch(final SearchRequestParams params, final BooleanFunction<Map<String, Object>> cursor,
            final OptionalThing<FessUserBean> userBean) {
        LaRequestUtil.getOptionalRequest().ifPresent(request -> {

    }

    @Test
    public void testScrollSearch_emptyResults() {
        // Create index without any documents
        createTestIndex();

        List<String> results = ScrollOperationHelper.scrollSearch(client, suggester.settings(), INDEX_NAME, QueryBuilders.matchAllQuery(),
                10, (hit, accumulator) -> accumulator.add(hit.getId()));

        assertNotNull(results);
        assertTrue(results.isEmpty());

     * @return the number of documents processed
     * @throws InvalidQueryException if the query is invalid
     */
    public long scrollSearch(final String index, final SearchCondition<SearchRequestBuilder> condition,
            final BooleanFunction<Map<String, Object>> cursor) {
        return scrollSearch(index, condition, getDefaultEntityCreator(), cursor);
    }

    /**

        }

        final long startTime = System.currentTimeMillis();

        try {
            final AtomicLong processedCount = new AtomicLong(0);
            final long count = searchEngineClient.scrollSearch(fessConfig.getIndexDocumentSearchIndex(), requestBuilder -> {
                requestBuilder.setQuery(query).setSize(scrollSize);
                return true;
            }, source -> {

        if (numFound > fessConfig.getIndexerMaxResultWindowSizeAsInteger().longValue()) {
            final List<Map<String, Object>> entityList = new ArrayList<>(Long.valueOf(numFound).intValue());
            searchEngineClient.scrollSearch(fessConfig.getIndexDocumentUpdateIndex(), requestBuilder -> {
                requestBuilder.setQuery(queryBuilder).setSize((int) numFound);
                if (fields != null) {

        final JsonRequestParams params = new JsonRequestParams(request, fessConfig);
        try {
            response.setContentType("application/x-ndjson; charset=UTF-8");
            final long count = searchHelper.scrollSearch(params, doc -> {
                buf.setLength(0);
                buf.append('{');
                boolean first2 = true;
                for (final Map.Entry<String, Object> entry : doc.entrySet()) {