@Override
    protected Client createClient() {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final String[] hosts =
                split(address, ",").get(stream -> stream.map(String::trim).filter(StringUtil::isNotEmpty).toArray(n -> new String[n]));
        final Builder builder = Settings.builder().putList("http.hosts", hosts).put("processors", fessConfig.getCrawlerHttpProcessors())

        }).orElse(Collections.emptyList());
    }

    public OptionalEntity<SynonymFile> getSynonymFile(final String dictId) {
        return dictionaryManager.getDictionaryFile(dictId).filter(SynonymFile.class::isInstance)
                .map(file -> OptionalEntity.of((SynonymFile) file)).orElse(OptionalEntity.empty());
    }

    public OptionalEntity<SynonymItem> getSynonymItem(final String dictId, final long id) {

        if (childUrlSet != null) {
            // add an url
            try {
                storeChildUrls(childUrlSet.stream().filter(rd -> StringUtil.isNotBlank(rd.getUrl())).collect(Collectors.toSet()),
                        urlQueue.getUrl(), urlQueue.getDepth() != null ? urlQueue.getDepth() + 1 : 1);
            } catch (final Throwable t) {

import org.codelibs.fess.es.config.cbean.cq.ElevateWordToLabelCQ;
import org.codelibs.fess.es.config.cbean.cq.bs.BsElevateWordToLabelCQ;
import org.opensearch.search.aggregations.bucket.filter.FilterAggregationBuilder;
import org.opensearch.search.aggregations.bucket.global.GlobalAggregationBuilder;
import org.opensearch.search.aggregations.bucket.missing.MissingAggregationBuilder;

"submit"]').addClass("disabled").attr("disabled","disabled"):a.find('*[type="submit"]').removeClass("disabled").removeAttr("disabled")},f=!1;a.formUtils.$win.bind("validatorsLoaded formValidationSetup",function(b,g,h){var i=h.disabledFormFilter?g.filter(h.disabledFormFilter):g,j=h.showErrorDialogs===c||h.showErrorDialogs,k=function(b,c,d){var e=a(this);d&&d.indexOf("blur")>-1?e.unbind("afterValidation",k):c.isValid?e.unbind("afterValidation",k):e.valAttr("have-been-blurred")||(c.shouldChangeDisp...

        }
        return stream(values).get(stream -> stream.allMatch(StringUtil::isBlank));
    }

    protected static String[] simplifyArray(final String[] values) {
        return stream(values).get(stream -> stream.filter(StringUtil::isNotBlank).distinct().toArray(n -> new String[n]));
    }

    public static String[] getParamValueArray(final HttpServletRequest request, final String param) {

            while ((entry = zis.getNextEntry()) != null) {
                if (!entry.isDirectory()) {
                    final String[] names = StreamUtil.split(entry.getName(), "/")
                            .get(stream -> stream.filter(s -> !"..".equals(s)).toArray(n -> new String[n]));
                    if (names.length < 2) {
                        continue;
                    }
                    if (logger.isDebugEnabled()) {

            authScheme = new DigestScheme();
        } else if (Constants.NTLM.equals(scheme)) {
            final Properties props = new Properties();
            paramMap.entrySet().stream().filter(e -> e.getKey().startsWith("jcifs.")).forEach(e -> {
                props.setProperty(e.getKey(), e.getValue());
            });
            authScheme = new NTLMScheme(new JcifsEngine(props));

            }
            if (getLogger().isDebugEnabled()) {
                getLogger().debug("ExtractData: {}", extractData);
            }
            // meta
            extractData.getKeySet().stream().filter(k -> extractData.getValues(k) != null).forEach(key -> {
                final String[] values = extractData.getValues(key);
                metaDataMap.put(key, values);

                // meta -> content

{"index":{"_index":"fess_config.scheduled_job","_id":"score_booster"}}