content: /*
   *  Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
   *  with the License.  You may obtain a copy of the License at
   *
   *        http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing,
   *  software distributed under the License is distributed on an
   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   *  KIND, either express or implied.  See the License for the
   *  specific language governing permissions and limitations
   *  under the License.
   */
  package org.apache.causeway.core.config.environment;
  
  import java.util.Locale;
  import java.util.Optional;
  
  import jakarta.annotation.PostConstruct;
  import jakarta.inject.Inject;
  
  import org.springframework.stereotype.Component;
  
  import org.apache.causeway.core.config.CausewayConfiguration;
  
  import lombok.extern.log4j.Log4j2;
  
  @Component
  @Log4j2
  public class CausewayLocaleInitializer {
  
      @Inject CausewayConfiguration configuration;
  
      @PostConstruct
      public void initLocale() {
          final Optional<String> localeSpecOpt = configuration.getCore().getRuntime().getLocale();
          localeSpecOpt.map(CausewayLocaleInitializer::toLocale).ifPresent(CausewayLocaleInitializer::setLocaleDefault);
          log.debug("locale is {}", Locale.getDefault());
      }
  
      // -- HELPER
  
      private static Locale toLocale(final String localeSpec) {
          final int pos = localeSpec.indexOf('_');
          Locale locale;
          if (pos == -1) {
              locale = new Locale(localeSpec, "");
          } else {
              final String language = localeSpec.substring(0, pos);
              final String country = localeSpec.substring(pos + 1);
              locale = new Locale(language, country);
          }
          return locale;
      }
  
      private static void setLocaleDefault(final Locale locale) {
          Locale.setDefault(locale);
          log.info("locale set to {}", locale);
      }
  
  }
  