/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  package ch.qos.logback.access.common.pattern;
  
  import java.time.ZoneId;
  import java.util.List;
  import java.util.Locale;
  
  import ch.qos.logback.access.common.spi.IAccessEvent;
  import ch.qos.logback.core.CoreConstants;
  import ch.qos.logback.core.util.CachingDateFormatter;
  
  public class DateConverter extends AccessConverter {
  
  
      CachingDateFormatter cachingDateFormatter = null;
  
      @Override
      public void start() {
  
          String datePattern = getFirstOption();
  
          if (datePattern == null) {
              datePattern = CoreConstants.CLF_DATE_PATTERN;
          } else if (datePattern.equals(CoreConstants.ISO8601_STR)) {
              datePattern = CoreConstants.ISO8601_PATTERN;
          } else if (datePattern.equals(CoreConstants.STRICT_STR)) {
              datePattern = CoreConstants.STRICT_ISO8601_PATTERN;
          }
  
          List<String> optionList = getOptionList();
          ZoneId zoneId = null;
          // if the option list contains a TZ option, then set it.
          if (optionList != null && optionList.size() > 1) {
              String zoneIdString = (String) optionList.get(1);
              zoneId = ZoneId.of(zoneIdString);
          }
          Locale locale = null;
          if (optionList != null && optionList.size() > 2) {
              String localeIdStr = (String) optionList.get(2);
              locale = Locale.forLanguageTag(localeIdStr);
              addInfo("Setting locale to \""+locale+"\"");
          }
  
          try {
              // if zoneId is null, the CachingDateFormatter will use the ZoneId.systemDefault()
              // if locale is null, the CachingDateFormatter will use the Locale.getDefault()
              cachingDateFormatter = new CachingDateFormatter(datePattern, zoneId, locale);
          } catch (IllegalArgumentException e) {
              addWarn("Could not instantiate SimpleDateFormat with pattern " + datePattern, e);
              addWarn("Defaulting to  " + CoreConstants.CLF_DATE_PATTERN);
              cachingDateFormatter = new CachingDateFormatter(CoreConstants.CLF_DATE_PATTERN, zoneId);
          }
  
          super.start();
      }
  
      @Override
  
      public String convert(IAccessEvent accessEvent) {
          long timestamp = accessEvent.getTimeStamp();
          return cachingDateFormatter.format(timestamp);
      }
  
      /**
       * This method is intended for test classes. Should not be used
       * by regular clients.
       *
       * @return the CachingDateFormatter in use
       * @deprecated Will be removed in future versions with no replacement
       */
      @Deprecated
      public CachingDateFormatter internalCachingDateFormatter() {
          return cachingDateFormatter;
      }
  }