return requestManager.getParameter(name).filter(StringUtil::isNotBlank).map(LocaleUtils::toLocale);
            } catch (final Exception e) {
                logger.debug("Failed to parse a value of {}.", name, e);
            }
        }
        return OptionalObject.empty();
    }

    @Override
    public OptionalThing<Locale> getRequestedLocale(final RequestManager requestManager) {

 */
package org.codelibs.fess.rank.fusion;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

                    return language.toLowerCase(Locale.ROOT) + "-" + country.toLowerCase(Locale.ROOT);
                }
                return language.toLowerCase(Locale.ROOT);
            }
            return null;
        }).toArray(n -> new String[n]));
    }

    default Locale getQueryLocaleFromName(final String name) {
        if (name == null) {
            return Locale.ROOT;
        }

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.api;

import java.util.Locale;
import java.util.stream.Collectors;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

import org.codelibs.fess.app.service.AccessTokenService;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

import java.net.URI;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

 */
package org.codelibs.fess.helper;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.regex.Pattern;

import javax.annotation.PostConstruct;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

        }
        if (logger.isDebugEnabled()) {
            logger.debug("Loaded {}", name);
        }
        scriptEngineMap.put(name.toLowerCase(Locale.ROOT), scriptEngine);
        scriptEngineMap.put(scriptEngine.getClass().getSimpleName().toLowerCase(Locale.ROOT), scriptEngine);
    }

    public ScriptEngine getScriptEngine(final String name) {
        if (name == null) {

    public static final String GOOGLE_CHAT_WEBHOOK_URLS_PROPERTY = "google.chat.webhook.urls";

    public static final String USE_BROWSER_LOCALE_FOR_SEARCH_PROPERTY = "search.use.browser.locale";

    public static final String SUGGEST_SEARCH_LOG_PROPERTY = "suggest.searchlog";

    public static final String SUGGEST_DOCUMENTS_PROPERTY = "suggest.document";

            final Set<String> langSet = new HashSet<>();
            final Enumeration<Locale> locales = request.getLocales();
            if (locales != null) {
                while (locales.hasMoreElements()) {
                    final Locale locale = locales.nextElement();
                    final String normalizeLang = systemHelper.normalizeLang(locale.toString());
                    if (normalizeLang != null) {