com.impossibl.postgres.datetime.ISOTimestampFormat Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of pgjdbc-ng Show documentation
PostgreSQL JDBC - NG - Driver
There is a newer version: 0.8.9
/**
 * Copyright (c) 2013, impossibl.com
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *  * Neither the name of impossibl.com nor the names of its contributors may
 *    be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package com.impossibl.postgres.datetime;

import java.time.LocalDateTime;
import java.time.OffsetDateTime;
import java.time.ZonedDateTime;
import java.time.chrono.IsoChronology;
import java.time.chrono.IsoEra;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeFormatterBuilder;
import java.time.format.SignStyle;
import java.time.temporal.ChronoField;
import java.time.temporal.Temporal;
import java.time.temporal.TemporalAccessor;

import static java.time.format.DateTimeFormatter.ISO_LOCAL_TIME;
import static java.time.temporal.ChronoField.DAY_OF_MONTH;
import static java.time.temporal.ChronoField.MONTH_OF_YEAR;
import static java.time.temporal.ChronoField.YEAR_OF_ERA;

public class ISOTimestampFormat implements DateTimeFormat {

  private Parser parser = new Parser();
  private Printer printer = new Printer();

  @Override
  public Parser getParser() {
    return parser;
  }

  @Override
  public Printer getPrinter() {
    return printer;
  }

  private static final DateTimeFormatter FMT =
      new DateTimeFormatterBuilder()
          .parseCaseInsensitive()
          .appendValue(YEAR_OF_ERA, 4, 10, SignStyle.EXCEEDS_PAD)
          .parseLenient()
          .appendLiteral('-')
          .appendValue(MONTH_OF_YEAR, 2)
          .appendLiteral('-')
          .appendValue(DAY_OF_MONTH, 2)
          .appendLiteral(' ')
          .append(ISO_LOCAL_TIME)
          .optionalStart()
          .appendOffset("+HH:mm", "+00")
          .optionalEnd()
          .toFormatter()
          .withChronology(IsoChronology.INSTANCE);

  private static final DateTimeFormatter FMT_ERA =
      new DateTimeFormatterBuilder()
          .parseCaseInsensitive()
          .appendValue(YEAR_OF_ERA, 4, 10, SignStyle.EXCEEDS_PAD)
          .parseLenient()
          .appendLiteral('-')
          .appendValue(MONTH_OF_YEAR, 2)
          .appendLiteral('-')
          .appendValue(DAY_OF_MONTH, 2)
          .appendLiteral(' ')
          .append(ISO_LOCAL_TIME)
          .optionalStart()
          .appendOffset("+HH:mm", "+00")
          .optionalEnd()
          .optionalStart()
          .appendPattern(" GG")
          .toFormatter()
          .withChronology(IsoChronology.INSTANCE);

  public static class Parser implements DateTimeFormat.Parser {

    @Override
    public TemporalAccessor parse(CharSequence text) {

      return FMT_ERA.parseBest(text, ZonedDateTime::from, OffsetDateTime::from, LocalDateTime::from);
    }

  }

  static class Printer implements DateTimeFormat.Printer {

    @Override
    public String format(Temporal temporal) {

      if (temporal.get(ChronoField.ERA) != IsoEra.CE.getValue()) {
        return FMT_ERA.format(temporal);
      }

      return FMT.format(temporal);
    }

  }

}