// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.tools.date;
import java.text.DateFormat;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.time.DateTimeException;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeFormatterBuilder;
import java.time.format.FormatStyle;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
import java.util.concurrent.TimeUnit;
import org.openstreetmap.josm.data.preferences.BooleanProperty;
import org.openstreetmap.josm.tools.CheckParameterUtil;
import org.openstreetmap.josm.tools.UncheckedParseException;
/**
* A static utility class dealing with:
*
* - parsing XML date quickly and formatting a date to the XML UTC format regardless of current locale
* - providing a single entry point for formatting dates to be displayed in JOSM GUI, based on user preferences
*
* @author nenik
*/
public final class DateUtils {
/**
* The UTC time zone.
*/
public static final TimeZone UTC = TimeZone.getTimeZone(ZoneOffset.UTC);
/**
* Property to enable display of ISO dates globally.
* @since 7299
*/
public static final BooleanProperty PROP_ISO_DATES = new BooleanProperty("iso.dates", false);
/**
* Constructs a new {@code DateUtils}.
*/
private DateUtils() {
// Hide default constructor for utils classes
}
/**
* Parses XML date quickly, regardless of current locale.
* @param str The XML date as string
* @return The date
* @throws UncheckedParseException if the date does not match any of the supported date formats
* @throws DateTimeException if the value of any field is out of range, or if the day-of-month is invalid for the month-year
*/
public static Date fromString(String str) {
return new Date(tsFromString(str));
}
/**
* Parses XML date quickly, regardless of current locale.
* @param str The XML date as string
* @return The date in milliseconds since epoch
* @throws UncheckedParseException if the date does not match any of the supported date formats
* @throws DateTimeException if the value of any field is out of range, or if the day-of-month is invalid for the month-year
*/
public static long tsFromString(String str) {
return parseInstant(str).toEpochMilli();
}
/**
* Parses the given date string quickly, regardless of current locale.
* @param str the date string
* @return the parsed instant
* @throws UncheckedParseException if the date does not match any of the supported date formats
*/
public static Instant parseInstant(String str) {
// "2007-07-25T09:26:24{Z|{+|-}01[:00]}"
try {
if (checkLayout(str, "xxxx-xx-xx") ||
checkLayout(str, "xxxx-xx") ||
checkLayout(str, "xxxx")) {
final ZonedDateTime local = ZonedDateTime.of(
parsePart4(str, 0),
str.length() > 5 ? parsePart2(str, 5) : 1,
str.length() > 8 ? parsePart2(str, 8) : 1,
0, 0, 0, 0, ZoneOffset.UTC);
return local.toInstant();
} else if (checkLayout(str, "xxxx-xx-xxTxx:xx:xxZ") ||
checkLayout(str, "xxxx-xx-xxTxx:xx:xx") ||
checkLayout(str, "xxxx:xx:xx xx:xx:xx") ||
checkLayout(str, "xxxx/xx/xx xx:xx:xx") ||
checkLayout(str, "xxxx-xx-xx xx:xx:xxZ") ||
checkLayout(str, "xxxx-xx-xx xx:xx:xx UTC") ||
checkLayout(str, "xxxx-xx-xxTxx:xx:xx+xx") ||
checkLayout(str, "xxxx-xx-xxTxx:xx:xx-xx") ||
checkLayout(str, "xxxx-xx-xxTxx:xx:xx+xx:00") ||
checkLayout(str, "xxxx-xx-xxTxx:xx:xx-xx:00")) {
final ZonedDateTime local = ZonedDateTime.of(
parsePart4(str, 0),
parsePart2(str, 5),
parsePart2(str, 8),
parsePart2(str, 11),
parsePart2(str, 14),
parsePart2(str, 17),
0,
ZoneOffset.UTC
);
if (str.length() == 22 || str.length() == 25) {
final int plusHr = parsePart2(str, 20);
return local.plusHours(str.charAt(19) == '+' ? -plusHr : plusHr).toInstant();
}
return local.toInstant();
} else if (checkLayout(str, "xxxx-xx-xxTxx:xx:xx.xxxZ") ||
checkLayout(str, "xxxx-xx-xxTxx:xx:xx.xxx") ||
checkLayout(str, "xxxx:xx:xx xx:xx:xx.xxx") ||
checkLayout(str, "xxxx/xx/xx xx:xx:xx.xxx") ||
checkLayout(str, "xxxx-xx-xxTxx:xx:xx.xxx+xx:00") ||
checkLayout(str, "xxxx-xx-xxTxx:xx:xx.xxx-xx:00")) {
final ZonedDateTime local = ZonedDateTime.of(
parsePart4(str, 0),
parsePart2(str, 5),
parsePart2(str, 8),
parsePart2(str, 11),
parsePart2(str, 14),
parsePart2(str, 17),
parsePart3(str, 20) * 1_000_000,
ZoneOffset.UTC
);
if (str.length() == 29) {
final int plusHr = parsePart2(str, 24);
return local.plusHours(str.charAt(23) == '+' ? -plusHr : plusHr).toInstant();
}
return local.toInstant();
} else if (checkLayout(str, "xxxx/xx/xx xx:xx:xx.xxxxxx")) {
return ZonedDateTime.of(
parsePart4(str, 0),
parsePart2(str, 5),
parsePart2(str, 8),
parsePart2(str, 11),
parsePart2(str, 14),
parsePart2(str, 17),
parsePart6(str, 20) * 1_000,
ZoneOffset.UTC
).toInstant();
} else {
// example date format "18-AUG-08 13:33:03"
SimpleDateFormat f = new SimpleDateFormat("dd-MMM-yy HH:mm:ss");
Date d = f.parse(str, new ParsePosition(0));
if (d != null)
return d.toInstant();
}
// slow path for fractional seconds different from millisecond precision
return ZonedDateTime.parse(str).toInstant();
} catch (IllegalArgumentException | DateTimeException ex) {
throw new UncheckedParseException("The date string (" + str + ") could not be parsed.", ex);
}
}
/**
* Formats a date to the XML UTC format regardless of current locale.
* @param timestamp number of seconds since the epoch
* @return The formatted date
* @since 14055
*/
public static String fromTimestamp(long timestamp) {
return fromTimestampInMillis(TimeUnit.SECONDS.toMillis(timestamp));
}
/**
* Formats a date to the XML UTC format regardless of current locale.
* @param timestamp number of milliseconds since the epoch
* @return The formatted date
* @since 14434
*/
public static String fromTimestampInMillis(long timestamp) {
final ZonedDateTime temporal = Instant.ofEpochMilli(timestamp).atZone(ZoneOffset.UTC);
return DateTimeFormatter.ISO_OFFSET_DATE_TIME.format(temporal);
}
/**
* Formats a date to the XML UTC format regardless of current locale.
* @param timestamp number of seconds since the epoch
* @return The formatted date
*/
public static String fromTimestamp(int timestamp) {
return fromTimestamp(Integer.toUnsignedLong(timestamp));
}
/**
* Formats a date to the XML UTC format regardless of current locale.
* @param date The date to format
* @return The formatted date
*/
public static String fromDate(Date date) {
final ZonedDateTime temporal = date.toInstant().atZone(ZoneOffset.UTC);
return DateTimeFormatter.ISO_OFFSET_DATE_TIME.format(temporal);
}
/**
* Null-safe date cloning method.
* @param d date to clone, or null
* @return cloned date, or null
* @since 11878
*/
public static Date cloneDate(Date d) {
return d != null ? (Date) d.clone() : null;
}
/**
* Check text for a specified layout
* @param text The text to check
* @param pattern The pattern to use
* @return {@code true} if the layout matches, otherwise {@code false}
*/
private static boolean checkLayout(String text, String pattern) {
if (text.length() != pattern.length())
return false;
for (int i = 0; i < pattern.length(); i++) {
char pc = pattern.charAt(i);
char tc = text.charAt(i);
if (pc == 'x' && Character.isDigit(tc))
continue;
else if (pc == 'x' || pc != tc)
return false;
}
return true;
}
private static int num(char c) {
return c - '0';
}
private static int parsePart2(String str, int off) {
return 10 * num(str.charAt(off)) + num(str.charAt(off + 1));
}
private static int parsePart3(String str, int off) {
return 100 * num(str.charAt(off)) + 10 * num(str.charAt(off + 1)) + num(str.charAt(off + 2));
}
private static int parsePart4(String str, int off) {
return 1000 * num(str.charAt(off)) + 100 * num(str.charAt(off + 1)) + 10 * num(str.charAt(off + 2)) + num(str.charAt(off + 3));
}
private static int parsePart6(String str, int off) {
return 100_000 * num(str.charAt(off))
+ 10_000 * num(str.charAt(off + 1))
+ 1_000 * num(str.charAt(off + 2))
+ 100 * num(str.charAt(off + 3))
+ 10 * num(str.charAt(off + 4))
+ num(str.charAt(off + 5));
}
/**
* Returns a new {@code SimpleDateFormat} for date only, according to ISO 8601.
* @return a new ISO 8601 date format, for date only.
* @since 7299
*/
public static SimpleDateFormat newIsoDateFormat() {
return new SimpleDateFormat("yyyy-MM-dd");
}
/**
* Returns the date format to be used for current user, based on user preferences.
* @param dateStyle The date style as described in {@link DateFormat#getDateInstance}. Ignored if "ISO dates" option is set
* @return The date format
* @since 7299
*/
public static DateFormat getDateFormat(int dateStyle) {
if (Boolean.TRUE.equals(PROP_ISO_DATES.get())) {
return newIsoDateFormat();
} else {
return DateFormat.getDateInstance(dateStyle, Locale.getDefault());
}
}
/**
* Returns the date formatter to be used for current user, based on user preferences.
* @param dateStyle The date style. Ignored if "ISO dates" option is set.
* @return The date format
*/
public static DateTimeFormatter getDateFormatter(FormatStyle dateStyle) {
DateTimeFormatter formatter = Boolean.TRUE.equals(PROP_ISO_DATES.get())
? DateTimeFormatter.ISO_LOCAL_DATE
: DateTimeFormatter.ofLocalizedDate(dateStyle);
return formatter.withZone(ZoneId.systemDefault());
}
/**
* Formats a date to be displayed to current user, based on user preferences.
* @param date The date to display. Must not be {@code null}
* @param dateStyle The date style as described in {@link DateFormat#getDateInstance}. Ignored if "ISO dates" option is set
* @return The formatted date
* @since 7299
*/
public static String formatDate(Date date, int dateStyle) {
CheckParameterUtil.ensureParameterNotNull(date, "date");
return getDateFormat(dateStyle).format(date);
}
/**
* Returns the time format to be used for current user, based on user preferences.
* @param timeStyle The time style as described in {@link DateFormat#getTimeInstance}. Ignored if "ISO dates" option is set
* @return The time format
* @since 7299
*/
public static DateFormat getTimeFormat(int timeStyle) {
if (Boolean.TRUE.equals(PROP_ISO_DATES.get())) {
// This is not strictly conform to ISO 8601. We just want to avoid US-style times such as 3.30pm
return new SimpleDateFormat("HH:mm:ss");
} else {
return DateFormat.getTimeInstance(timeStyle, Locale.getDefault());
}
}
/**
* Returns the time formatter to be used for current user, based on user preferences.
* @param timeStyle The time style. Ignored if "ISO dates" option is set.
* @return The time format
*/
public static DateTimeFormatter getTimeFormatter(FormatStyle timeStyle) {
DateTimeFormatter formatter = Boolean.TRUE.equals(PROP_ISO_DATES.get())
? DateTimeFormatter.ISO_LOCAL_TIME
: DateTimeFormatter.ofLocalizedTime(timeStyle);
return formatter.withZone(ZoneId.systemDefault());
}
/**
* Formats a time to be displayed to current user, based on user preferences.
* @param time The time to display. Must not be {@code null}
* @param timeStyle The time style as described in {@link DateFormat#getTimeInstance}. Ignored if "ISO dates" option is set
* @return The formatted time
* @since 7299
*/
public static String formatTime(Date time, int timeStyle) {
CheckParameterUtil.ensureParameterNotNull(time, "time");
return getTimeFormat(timeStyle).format(time);
}
/**
* Returns the date/time format to be used for current user, based on user preferences.
* @param dateStyle The date style as described in {@link DateFormat#getDateTimeInstance}. Ignored if "ISO dates" option is set
* @param timeStyle The time style as described in {@code DateFormat.getDateTimeInstance}. Ignored if "ISO dates" option is set
* @return The date/time format
* @since 7299
*/
public static DateFormat getDateTimeFormat(int dateStyle, int timeStyle) {
if (Boolean.TRUE.equals(PROP_ISO_DATES.get())) {
// This is not strictly conform to ISO 8601. We just want to avoid US-style times such as 3.30pm
// and we don't want to use the 'T' separator as a space character is much more readable
return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
} else {
return DateFormat.getDateTimeInstance(dateStyle, timeStyle, Locale.getDefault());
}
}
/**
* Differs from {@link DateTimeFormatter#ISO_LOCAL_DATE_TIME} by using ' ' instead of 'T' to separate date/time.
*/
private static final DateTimeFormatter ISO_LOCAL_DATE_TIME = new DateTimeFormatterBuilder()
.parseCaseInsensitive()
.append(DateTimeFormatter.ISO_LOCAL_DATE)
.appendLiteral(' ')
.append(DateTimeFormatter.ISO_LOCAL_TIME)
.toFormatter();
/**
* Returns the date/time formatter to be used for current user, based on user preferences.
* @param dateStyle The date style. Ignored if "ISO dates" option is set.
* @param timeStyle The time style. Ignored if "ISO dates" option is set.
* @return The date/time format
*/
public static DateTimeFormatter getDateTimeFormatter(FormatStyle dateStyle, FormatStyle timeStyle) {
DateTimeFormatter formatter = Boolean.TRUE.equals(PROP_ISO_DATES.get())
? ISO_LOCAL_DATE_TIME
: DateTimeFormatter.ofLocalizedDateTime(dateStyle, timeStyle);
return formatter.withZone(ZoneId.systemDefault());
}
/**
* Formats a date/time to be displayed to current user, based on user preferences.
* @param datetime The date/time to display. Must not be {@code null}
* @param dateStyle The date style as described in {@link DateFormat#getDateTimeInstance}. Ignored if "ISO dates" option is set
* @param timeStyle The time style as described in {@code DateFormat.getDateTimeInstance}. Ignored if "ISO dates" option is set
* @return The formatted date/time
* @since 7299
*/
public static String formatDateTime(Date datetime, int dateStyle, int timeStyle) {
CheckParameterUtil.ensureParameterNotNull(datetime, "datetime");
return getDateTimeFormat(dateStyle, timeStyle).format(datetime);
}
}