if (num == null) {
            num = fessConfig.getPagingSearchPageSizeAsInteger();
        }
        if (num > fessConfig.getPagingSearchPageMaxSizeAsInteger().intValue() || num <= 0) {
            num = fessConfig.getPagingSearchPageMaxSizeAsInteger();
        }
        return num;
    }

    @Override
    public String[] getLanguages() {

            num = fessConfig.getPagingSearchPageSizeAsInteger();
        } else {
            try {
                if (num.intValue() > fessConfig.getPagingSearchPageMaxSizeAsInteger().intValue() || num.intValue() <= 0) {
                    num = fessConfig.getPagingSearchPageMaxSizeAsInteger();
                }
            } catch (final NumberFormatException e) {
                num = fessConfig.getPagingSearchPageSizeAsInteger();

            } else {
                try {
                    pageSize = Integer.parseInt(num);
                    if (pageSize > fessConfig.getPagingSearchPageMaxSizeAsInteger().intValue() || pageSize <= 0) {
                        pageSize = fessConfig.getPagingSearchPageMaxSizeAsInteger();
                    }
                } catch (final NumberFormatException e) {

                    queryHelper.buildRoleQuery(roleSet, boolQuery);
                }
            }
            builder.setQuery(boolQuery);
            builder.setSize(fessConfig.getPagingSearchPageMaxSizeAsInteger());
            builder.setFetchSource(fields, null);
            queryHelper.processSearchPreference(builder, userBean, String.join(StringUtil.EMPTY, docIds));
            return true;
        });
    }

    protected Set<String> availableSearcherNameSet;

    @PostConstruct
    public void init() {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final int maxPageSize = fessConfig.getPagingSearchPageMaxSizeAsInteger();
        final int windowSize = fessConfig.getRankFusionWindowSizeAsInteger();
        if (maxPageSize * 2 < windowSize) {
            logger.warn("rank.fusion.window_size is lower than paging.search.page.max.size. "

     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not integer.
     */
    Integer getPagingSearchPageMaxSizeAsInteger();

    /**
     * Get the value for the key 'searchlog.agg.shard.size'. <br>
     * The value is, e.g. -1 <br>