text: /*
   * Copyright 2016-2020 Chronicle Software
   *
   * https://chronicle.software
   *
   * Licensed 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 net.openhft.chronicle.wire;
  
  import net.openhft.chronicle.core.time.LongTime;
  
  import java.time.LocalDateTime;
  import java.time.ZoneOffset;
  import java.time.format.DateTimeFormatter;
  import java.time.format.DateTimeFormatterBuilder;
  import java.time.format.DateTimeParseException;
  import java.time.temporal.ChronoField;
  import java.time.temporal.TemporalAccessor;
  
  public class MicroTimestampLongConverter implements LongConverter {
      public static final MicroTimestampLongConverter INSTANCE = new MicroTimestampLongConverter();
      final DateTimeFormatter dtf = new DateTimeFormatterBuilder()
              .appendPattern("yyyy-MM-dd'T'HH:mm:ss")
              .appendFraction(ChronoField.MICRO_OF_SECOND, 0, 6, true)
              .toFormatter();
  
      @Override
      public long parse(CharSequence text) {
          if (text == null || text.length() == 0)
              return 0;
          try {
              if (text.length() > 4 && text.charAt(4) == '/')
                  text = text.toString().replace('/', '-');
              TemporalAccessor parse = dtf.parse(text);
              long time = parse.getLong(ChronoField.EPOCH_DAY) * 86400_000_000L;
              if (parse.isSupported(ChronoField.MICRO_OF_DAY))
                  time += parse.getLong(ChronoField.MICRO_OF_DAY);
              else if (parse.isSupported(ChronoField.MILLI_OF_DAY))
                  time += parse.getLong(ChronoField.MILLI_OF_DAY) * 1_000L;
              else if (parse.isSupported(ChronoField.SECOND_OF_DAY))
                  time += parse.getLong(ChronoField.SECOND_OF_DAY) * 1_000_000L;
  
              return time;
          } catch (DateTimeParseException dtpe) {
              try {
                  long number = LongTime.toMicros(Long.parseLong(text.toString()));
                  if (LongTime.isMicros(number)) {
                      System.out.println("In input data, replace " + text + " with " + asString(number));
                  } else {
                      if (number != 0)
                          System.out.println("In input data, replace " + text + " with a real date.");
                  }
                  return number;
              } catch (NumberFormatException e) {
                  throw dtpe;
              }
          }
      }
  
      @Override
      public void append(StringBuilder text, long value) {
          if (value <= 0) {
              text.append(value);
              return;
          }
          LocalDateTime ldt = LocalDateTime.ofEpochSecond(
                  value / 1_000_000,
                  (int) (value % 1_000_000 * 1000),
                  ZoneOffset.UTC);
          dtf.formatTo(ldt, text);
      }
  }
  