fi.evolver.utils.DateUtils Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of evolver-utils
Generic Evolver utility classes
There is a newer version: 3.5.0
package fi.evolver.utils;

import java.time.LocalDateTime;
import java.time.OffsetDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;

public class DateUtils {
	public static final int MS_IN_SECOND = 1000;
	public static final int MS_IN_MINUTE = 60 * MS_IN_SECOND;
	public static final int MS_IN_HOUR = 60 * MS_IN_MINUTE;
	public static final int MS_IN_DAY = 24 * MS_IN_HOUR;

	public static final ZoneId ZONE_HELSINKI = ZoneId.of("Europe/Helsinki");
	public static final ZoneId ZONE_UTC = ZoneId.of("UTC");

	public static final DateTimeFormatter FORMAT_DATE_FI = DateTimeFormatter.ofPattern("dd.MM.yyyy");
	public static final DateTimeFormatter FORMAT_DATE_TIME_FI = DateTimeFormatter.ofPattern("dd.MM.yyyy HH:mm:ss");


	private DateUtils() { }


	/**
	 * Converts a LocalDateTime into an OffsetDateTime with the Europe/Helsinki zone's offset.
	 *
	 * @param timestamp The value to convert.
	 * @return The converted value.
	 */
	public static OffsetDateTime toOffsetDateTimeFi(LocalDateTime timestamp) {
		return toOffsetDateTime(timestamp, ZONE_HELSINKI);
	}

	/**
	 * Converts a LocalDateTime into an OffsetDateTime with the given time zone's offset.
	 *
	 * @param timestamp The value to convert.
	 * @param zoneId The target time zone.
	 * @return The converted value.
	 */
	public static OffsetDateTime toOffsetDateTime(LocalDateTime timestamp, ZoneId zoneId) {
		if (timestamp == null)
			return null;
		return timestamp.atZone(zoneId).toOffsetDateTime();
	}


	/**
	 * Converts a LocalDateTime into a ZonedDateTime at the Europe/Helsinki zone.
	 *
	 * @param timestamp The value to convert.
	 * @return The converted value.
	 */
	public static ZonedDateTime toZonedDateTimeFi(LocalDateTime timestamp) {
		return toZonedDateTime(timestamp, ZONE_HELSINKI);
	}

	/**
	 * Converts a LocalDateTime into a ZonedDateTime at the given time zone.
	 *
	 * @param timestamp The value to convert.
	 * @param zoneId The target time zone.
	 * @return The converted value.
	 */
	public static ZonedDateTime toZonedDateTime(LocalDateTime timestamp, ZoneId zoneId) {
		if (timestamp == null)
			return null;
		return timestamp.atZone(zoneId);
	}


	/**
	 * Converts an OffsetDateTime into a LocalDateTime of the Europe/Helsinki time zone.
	 *
	 * @param timestamp The value to convert.
	 * @return The converted value.
	 */
	public static LocalDateTime toLocalDateTimeFi(OffsetDateTime timestamp) {
		return toLocalDateTime(timestamp, ZONE_HELSINKI);
	}

	/**
	 * Converts an OffsetDateTime into a LocalDateTime of the given time zone.
	 *
	 * @param timestamp The value to convert.
	 * @param zoneId The target time zone.
	 * @return The converted value.
	 */
	public static LocalDateTime toLocalDateTime(OffsetDateTime timestamp, ZoneId zoneId) {
		if (timestamp == null)
			return null;
		return timestamp.atZoneSameInstant(zoneId).toLocalDateTime();
	}

}