return null;
    }

    @Override
    protected String createFromHint() {
        return null;
    }

    @Override
    protected String createSqlSuffix() {
        return null;
    }

    @Override
    public void fetchFirst(int fetchSize) {
        _fetchScopeEffective = true;
        if (fetchSize < 0) {
            String msg = "Argument[fetchSize] should be plus: " + fetchSize;

    protected String queryString;

    /** Set of query terms that should be highlighted in search results. */
    protected Set<String> highlightedQuerySet = null;

    /** Map storing field names and their associated query terms for logging. */
    protected Map<String, List<String>> fieldLogMap = null;

    /** Flag indicating whether role-based query filtering should be disabled. */
    protected boolean disableRoleQuery = false;

    @Test
    public void test_loadConfigParams() {
        Map<String, Object> paramMap;
        String configParam;

        // Test with empty map and null config
        paramMap = new HashMap<>();
        ParameterUtil.loadConfigParams(paramMap, null);
        assertEquals(0, paramMap.size());

        // Test with empty map and empty config
        paramMap = new HashMap<>();

        final String requestsPerSecond = getReindexRequestsPerSecound(fessConfig);
        final String scroll = StringUtil.isNotBlank(fessConfig.getIndexReindexScroll()) ? fessConfig.getIndexReindexScroll() : null;
        final String maxDocs = StringUtil.isNotBlank(fessConfig.getIndexReindexMaxDocs()) ? fessConfig.getIndexReindexMaxDocs() : null;

            short maxCpu = 0;
            for (final NodeStats nodeStats : response.getNodes()) {
                final OsStats os = nodeStats.getOs();
                if (os != null && os.getCpu() != null) {
                    final short percent = os.getCpu().getPercent();
                    if (percent > maxCpu) {
                        maxCpu = percent;
                    }
                }
            }

    private static final String PASSWORD = "password";
    private static final String NAME = "name";

    private String indexName = null;

    @Override
    protected String asEsIndex() {
        if (indexName == null) {
            final String name = ComponentUtil.getFessConfig().getIndexUserIndex();
            indexName = super.asEsIndex().replaceFirst(Pattern.quote("fess_user"), name);
        }

        if (boostExpr != null) {
            addFieldToSource(sourceMap, "boostExpr", boostExpr);
        }
        if (createdBy != null) {
            addFieldToSource(sourceMap, "createdBy", createdBy);
        }
        if (createdTime != null) {
            addFieldToSource(sourceMap, "createdTime", createdTime);
        }
        if (sortOrder != null) {

        return replacedAccessors;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        UpgradedProperty that = (UpgradedProperty) o;

        }

        //   required check
        final Object urlObj = dataMap.get(fessConfig.getIndexFieldUrl());
        if (urlObj == null) {
            final Object configId = dataMap.get(fessConfig.getIndexFieldConfigId());
            throw new DataStoreException("URL field is null in dataMap. Cannot index document without a URL. configId: " + configId);
        }

        currentPageNumber = getDefaultCurrentPageNumber();

        id = null;
        name = null;
        handlerName = null;
        boost = null;
        available = null;
        sortOrder = null;
        createdBy = null;
        createdTime = null;
        versionNo = null;
        description = null;

    }

    /**
     * Returns the default current page number.
     *