}
    }

    /**
     * Sets the main searcher at index 0 of the searchers list.
     * This method is used to configure the primary searcher for rank fusion processing.
     * If searchers list is empty, adds the searcher; otherwise, replaces the first searcher.
     *
     * @param searcher the RankFusionSearcher to set as the main searcher
     */
    public void setSearcher(final RankFusionSearcher searcher) {

            final TestSearcher searcher = new TestSearcher(50);
            processor.register(searcher);
            processor.register(searcher); // Register same instance again
            processor.init();

            // Should still work without errors
            final List<Map<String, Object>> results = processor.search("*", new TestSearchRequestParams(0, 10, 0), OptionalThing.empty());

            // Should handle exception gracefully and return results from working searcher
            final List<Map<String, Object>> results = processor.search("*", new TestSearchRequestParams(0, 10, 0), OptionalThing.empty());
            assertNotNull(results);
        }
    }

    /**
     * Test handling of searcher that throws FessSystemException.
     */
    @Test

        }

        final String[] searchers = DocumentUtil.getValue(docMap, Constants.SEARCHER, String[].class);
        if (searchers != null) {
            docMap.put(Constants.SEARCHER, ArrayUtil.add(searchers, getName()));
        } else {
            docMap.put(Constants.SEARCHER, new String[] { getName() });
        }

        return docMap;
    }

                        }
                    });
                }

                startLatch.countDown();
                assertTrue("Concurrent searches timed out", endLatch.await(10, TimeUnit.SECONDS));

                // Verify all searches completed and returned results
                assertEquals(numSearchThreads, allResults.size());
                for (List<Map<String, Object>> results : allResults) {

    public static final Boolean F = false;

    /** Constant for score field identifier. */
    public static final String SCORE = "score";

    /** Constant for searcher identifier. */
    public static final String SEARCHER = "searcher";

    /** Constant representing "on" state. */
    public static final String ON = "on";

    // ============================================================
    // Status Constants

     */
    @Size(max = 1000)
    public String notificationTo;

    /**
     * Enable or disable search suggestions based on search logs.
     * When enabled, suggestions are generated from previous searches.
     */
    @Size(max = 10)
    public String suggestSearchLog;

    /**
     * Enable or disable search suggestions based on document content.
     * When enabled, suggestions are generated from indexed documents.

    /** Array of fields that can be searched against */
    protected String[] searchFields;

    /** Set of fields that can be searched against for O(1) lookup */
    protected Set<String> searchFieldSet;

    /** Array of fields that can be used for faceted search */
    protected String[] facetFields;

    /** Set of fields that can be used for faceted search for O(1) lookup */
    protected Set<String> facetFieldSet;

    public void test_getSearchFields() {
        String[] fields = { "search1", "search2", "search3" };
        queryFieldConfig.setSearchFields(fields);

        String[] result = queryFieldConfig.getSearchFields();
        assertSame(fields, result);
    }

    @Test
    public void test_setSearchFields() {
        String[] fields = { "search1", "search2", "search3" };
        queryFieldConfig.setSearchFields(fields);

import org.opensearch.search.rescore.RescorerBuilder;
import org.opensearch.search.sort.SortBuilder;
import org.opensearch.search.sort.SortBuilders;
import org.opensearch.search.sort.SortOrder;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpSession;

/**
 * QueryHelper is responsible for building and managing OpenSearch queries for Fess search functionality.