gt:         if (date.getTime() < ERA_START && defaultEraFormat != null) {
context: /*
   * Copyright (C) 2003, 2004 Joe Walnes.
   * Copyright (C) 2006, 2007, 2008, 2009, 2011, 2012, 2013, 2014, 2015, 2016, 2018 XStream Committers.
   * All rights reserved.
   *
   * The software in this package is published under the terms of the BSD
   * style license a copy of which has been included with this distribution in
   * the LICENSE.txt file.
   * 
   * Created on 26. September 2003 by Joe Walnes
   */
  package com.thoughtworks.xstream.converters.basic;
  
  import java.text.ParseException;
  import java.text.SimpleDateFormat;
  import java.util.ArrayList;
  import java.util.Calendar;
  import java.util.Date;
  import java.util.List;
  import java.util.Locale;
  import java.util.TimeZone;
  
  import com.thoughtworks.xstream.converters.ConversionException;
  import com.thoughtworks.xstream.converters.ErrorReporter;
  import com.thoughtworks.xstream.converters.ErrorWriter;
  import com.thoughtworks.xstream.core.JVM;
  import com.thoughtworks.xstream.core.util.ThreadSafeSimpleDateFormat;
  
  
  /**
   * Converts a {@link Date} to a string as a date format, retaining precision down to milliseconds.
   * <p>
   * The formatted string is by default in UTC and English locale. You can provide a different {@link Locale} and
   * {@link TimeZone} that are used for serialization or <code>null</code> to use always the current TimeZone. Note, that
   * the default format uses 3-letter time zones that can be ambiguous and may cause wrong results at deserialization and
   * is localized since Java 6.
   * </p>
   * <p>
   * Using a Java 7 runtime or higher, the converter supports the <a href="http://www.w3.org/TR/NOTE-datetime">datetime
   * format defined by W3C</a> (a subset of ISO 8601) at deserialization. Only the formats that also contain the time
   * information.
   * </p>
   * <p>
   * Dates in a different era are using a special default pattern that contains the era itself.
   * </p>
   * 
   * @author Joe Walnes
   * @author J&ouml;rg Schaible
   */
  public class DateConverter extends AbstractSingleValueConverter implements ErrorReporter {
  
      private static final String[] DEFAULT_ACCEPTABLE_FORMATS;
      private static final String DEFAULT_PATTERN;
      private static final String DEFAULT_ERA_PATTERN;
      private static final TimeZone UTC;
      private static final long ERA_START;
      static {
          UTC = TimeZone.getTimeZone("UTC");
          
          final String defaultPattern = "yyyy-MM-dd HH:mm:ss.S z";
          final String defaultEraPattern = "yyyy-MM-dd G HH:mm:ss.S z";
          final List acceptablePatterns = new ArrayList();
          final boolean utcSupported = JVM.canParseUTCDateFormat();
          DEFAULT_PATTERN = utcSupported ? defaultPattern : "yyyy-MM-dd HH:mm:ss.S 'UTC'";
          DEFAULT_ERA_PATTERN = utcSupported ? defaultEraPattern : "yyyy-MM-dd G HH:mm:ss.S 'UTC'";
          acceptablePatterns.add("yyyy-MM-dd HH:mm:ss.S z");
          if (!utcSupported) {
              acceptablePatterns.add(defaultPattern);
          }
          acceptablePatterns.add("yyyy-MM-dd HH:mm:ss.S a");
          // JDK 1.3 needs both versions
          acceptablePatterns.add("yyyy-MM-dd HH:mm:ssz");
          acceptablePatterns.add("yyyy-MM-dd HH:mm:ss z");
          if (!utcSupported) {
              acceptablePatterns.add("yyyy-MM-dd HH:mm:ss 'UTC'");
          }
          if (JVM.canParseISO8601TimeZoneInDateFormat()) {
              acceptablePatterns.add("yyyy-MM-dd'T'HH:mm:ss.SX");
              acceptablePatterns.add("yyyy-MM-dd'T'HH:mm:ssX");
              acceptablePatterns.add("yyyy-MM-dd'T'HH:mmX");
          }
          // backwards compatibility
          acceptablePatterns.add("yyyy-MM-dd HH:mm:ssa");
          DEFAULT_ACCEPTABLE_FORMATS = (String[]) acceptablePatterns.toArray(new String[acceptablePatterns.size()]);
          
          final Calendar cal = Calendar.getInstance();
          cal.setTimeZone(UTC);
          cal.clear();
          cal.set(1, Calendar.JANUARY, 1);
          ERA_START = cal.getTime().getTime(); // calendar.getTimeInMillis() not available under JDK 1.3
      }
      private final ThreadSafeSimpleDateFormat defaultFormat;
      private final ThreadSafeSimpleDateFormat defaultEraFormat;
      private final ThreadSafeSimpleDateFormat[] acceptableFormats;
  
      /**
       * Construct a DateConverter with standard formats and lenient set off.
       */
      public DateConverter() {
          this(false);
      }
  
      /**
       * Construct a DateConverter with standard formats, lenient set off and uses a given
       * TimeZone for serialization.
       * 
       * @param timeZone the TimeZone used to serialize the Date
       * @since 1.4
       */
      public DateConverter(final TimeZone timeZone) {
          this(DEFAULT_PATTERN, DEFAULT_ACCEPTABLE_FORMATS, timeZone);
      }
  
      /**
       * Construct a DateConverter with standard formats and using UTC.
       * 
       * @param lenient the lenient setting of {@link SimpleDateFormat#setLenient(boolean)}
       * @since 1.3
       */
      public DateConverter(final boolean lenient) {
          this(DEFAULT_PATTERN, DEFAULT_ACCEPTABLE_FORMATS, lenient);
      }
  
      /**
       * Construct a DateConverter with lenient set off using UTC.
       * 
       * @param defaultFormat the default format
       * @param acceptableFormats fallback formats
       */
      public DateConverter(final String defaultFormat, final String[] acceptableFormats) {
          this(defaultFormat, acceptableFormats, false);
      }
  
      /**
       * Construct a DateConverter with a given TimeZone and lenient set off.
       * 
       * @param defaultFormat the default format
       * @param acceptableFormats fallback formats
       * @since 1.4
       */
      public DateConverter(final String defaultFormat, final String[] acceptableFormats, final TimeZone timeZone) {
          this(defaultFormat, acceptableFormats, timeZone, false);
      }
  
      /**
       * Construct a DateConverter.
       * 
       * @param defaultFormat the default format
       * @param acceptableFormats fallback formats
       * @param lenient the lenient setting of {@link SimpleDateFormat#setLenient(boolean)}
       * @since 1.3
       */
      public DateConverter(final String defaultFormat, final String[] acceptableFormats, final boolean lenient) {
          this(defaultFormat, acceptableFormats, UTC, lenient);
      }
  
      /**
       * Construct a DateConverter.
       * 
       * @param defaultFormat the default format
       * @param acceptableFormats fallback formats
       * @param timeZone the TimeZone used to serialize the Date
       * @param lenient the lenient setting of {@link SimpleDateFormat#setLenient(boolean)}
       * @since 1.4
       */
      public DateConverter(
              final String defaultFormat, final String[] acceptableFormats, final TimeZone timeZone, final boolean lenient) {
          this(DEFAULT_ERA_PATTERN, defaultFormat, acceptableFormats, Locale.ENGLISH, timeZone, lenient);
      }
  
      /**
       * Construct a DateConverter.
       * 
       * @param defaultEraFormat the default format for dates in a different era (may be
       *            <code>null</code> to drop era support)
       * @param defaultFormat the default format
       * @param acceptableFormats fallback formats
       * @param locale locale to use for the format
       * @param timeZone the TimeZone used to serialize the Date
       * @param lenient the lenient setting of {@link SimpleDateFormat#setLenient(boolean)}
       * @since 1.4.4
       */
      public DateConverter(
              final String defaultEraFormat, final String defaultFormat, final String[] acceptableFormats,
              final Locale locale, final TimeZone timeZone, final boolean lenient) {
          if (defaultEraFormat != null) {
              this.defaultEraFormat = new ThreadSafeSimpleDateFormat(
                  defaultEraFormat, timeZone, locale, 4, 20, lenient);
          } else {
              this.defaultEraFormat = null;
          }
          this.defaultFormat = new ThreadSafeSimpleDateFormat(
              defaultFormat, timeZone, locale, 4, 20, lenient);
          this.acceptableFormats = acceptableFormats != null
              ? new ThreadSafeSimpleDateFormat[acceptableFormats.length]
              : new ThreadSafeSimpleDateFormat[0];
          for (int i = 0; i < this.acceptableFormats.length; i++ ) {
              this.acceptableFormats[i] = new ThreadSafeSimpleDateFormat(
                  acceptableFormats[i], timeZone, locale, 1, 20, lenient);
          }
      }
  
      public boolean canConvert(Class type) {
          return type == Date.class;
      }
  
      public Object fromString(String str) {
          if (defaultEraFormat != null) {
              try {
                  return defaultEraFormat.parse(str);
              } catch (ParseException e) {
                  // try next ...
              }
          }
          if (defaultEraFormat != defaultFormat) {
              try {
                  return defaultFormat.parse(str);
              } catch (ParseException e) {
                  // try next ...
              }
          }
          for (int i = 0; i < acceptableFormats.length; i++ ) {
              try {
                  return acceptableFormats[i].parse(str);
              } catch (ParseException e3) {
                  // no worries, let's try the next format.
              }
          }
          // no dateFormats left to try
          ConversionException exception = new ConversionException("Cannot parse date");
          exception.add("date", str);
          throw exception;
      }
  
      public String toString(Object obj) {
          final Date date = (Date)obj;
  