import org.opensearch.common.document.DocumentField;
import org.opensearch.search.SearchHit;
import org.opensearch.search.SearchHits;
import org.opensearch.search.aggregations.Aggregations;
import org.opensearch.search.fetch.subphase.highlight.HighlightField;

/**
 * Default implementation of RankFusionSearcher that performs standard OpenSearch queries.
 * This searcher handles query execution, response processing, and document highlighting.
 */

        }
        return Collections.emptyList();
    }

    /**
     * Adds a query term to the highlighted query set.
     * @param text The query text to highlight.
     */
    public void addHighlightedQuery(final String text) {
        if (highlightedQuerySet != null) {
            highlightedQuerySet.add(text);
        }
    }

    /** The key of the configuration. e.g. <strong> */
    String QUERY_HIGHLIGHT_TAG_PRE = "query.highlight.tag.pre";

    /** The key of the configuration. e.g. </strong> */
    String QUERY_HIGHLIGHT_TAG_POST = "query.highlight.tag.post";

    /** The key of the configuration. e.g. u0009u000Au0013u0020 */
    String QUERY_HIGHLIGHT_BOUNDARY_CHARS = "query.highlight.boundary.chars";

    /** Request attribute key for storing queries. */
    public static final String REQUEST_QUERIES = "fess.Queries";

    /** Request attribute key for storing highlight queries. */
    public static final String HIGHLIGHT_QUERIES = "fess.HighlightQueries";

    /** Request attribute key for storing field logs. */
    public static final String FIELD_LOGS = "fess.FieldLogs";

        }

        @Override
        public Object getAttribute(String name) {
            if (Constants.HIGHLIGHT_QUERIES.equals(name)) {
                return Collections.singleton("highlight query");
            }
            return null;
        }

        @Override
        public Locale getLocale() {
            return locale;
        }

        @Override

                    "<script src=\"https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.11.1/highlight.min.js\"></script>" +
                    "<script src=\"https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.11.1/languages/xml.min.js\"></script>" +
                    "<script src=\"https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.11.1/languages/kotlin.min.js\"></script>" +

            .attr("rel", "stylesheet")
            .attr("href", "https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.11.1/styles/stackoverflow-light.min.css");

        head.appendElement("script")
            .attr("src", "https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.11.1/highlight.min.js");

        head.appendElement("script")
            .append("hljs.highlightAll();");
    }

        public HighlightInfo getHighlightInfo() {
            return new HighlightInfo().fragmentSize(Integer.parseInt(fessConfig.getOrDefault("rag.chat.highlight.fragment.size", "500")))
                    .numOfFragments(Integer.parseInt(fessConfig.getOrDefault("rag.chat.highlight.number.of.fragments", "3")))
                    .preTags(StringUtil.EMPTY)
                    .postTags(StringUtil.EMPTY);
        }

        String[] fields = { "highlight1", "highlight2", "highlight3" };
        queryFieldConfig.setHighlightedFields(fields);

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

    @Test
    public void test_setHighlightedFields() {
        String[] fields = { "highlight1", "highlight2", "highlight3" };

#80bdff;\n}\n\n.select2-container--default .select2-primary .select2-results__option--highlighted,\n.select2-primary .select2-container--default .select2-results__option--highlighted {\n  background-color: #007bff;\n  color: #fff;\n}\n\n.select2-container--default .select2-primary .select2-results__option--highlighted[aria-selected], .select2-container--default .select2-primary .select2-results__option--highlighted[aria-selected]:hover,\n.select2-primary .select2-container--default .select2-result...