com.itextpdf.commons.utils.DateTimeUtil Maven / Gradle / Ivy
/*
This file is part of the iText (R) project.
Copyright (c) 1998-2021 iText Group NV
Authors: Bruno Lowagie, Paulo Soares, et al.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License version 3
as published by the Free Software Foundation with the addition of the
following permission added to Section 15 as permitted in Section 7(a):
FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
OF THIRD PARTY RIGHTS
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program; if not, see http://www.gnu.org/licenses or write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA, 02110-1301 USA, or download the license from the following URL:
http://itextpdf.com/terms-of-use/
The interactive user interfaces in modified source and object code versions
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Section 5 of the GNU Affero General Public License.
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You can be released from the requirements of the license by purchasing
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*/
package com.itextpdf.commons.utils;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;
/**
* This file is a helper class for internal usage only.
* Be aware that its API and functionality may be changed in future.
*/
public final class DateTimeUtil {
private static final String DEFAULT_PATTERN = "yyyy-MM-dd";
private DateTimeUtil() {
// Empty constructor.
}
/**
* Gets the {@link Calendar} as UTC milliseconds from the epoch.
*
* @param calendar the calendar to be converted to millis
* @return the date as UTC milliseconds from the epoch
*/
public static double getUtcMillisFromEpoch(Calendar calendar) {
if (calendar == null) {
calendar = new GregorianCalendar();
}
return calendar.getTimeInMillis();
}
/**
* Gets the date as {@link Calendar}.
*
* @param date the date to be returned as {@link Calendar}
* @return the date as {@link Calendar}
*/
public static Calendar getCalendar(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar;
}
public static Calendar getCurrentTimeCalendar() {
return new GregorianCalendar();
}
public static Date getCurrentTimeDate() {
return new Date();
}
public static Calendar addDaysToCalendar(Calendar calendar, int days) {
calendar.add(Calendar.DAY_OF_YEAR, days);
return calendar;
}
public static boolean isInPast(Date date) {
return date.before(getCurrentTimeDate());
}
public static long getRelativeTime(Date date) {
return date.getTime();
}
public static Date addDaysToDate(Date date, int days) {
Calendar cal = new GregorianCalendar();
cal.setTime(date);
cal.add(Calendar.DAY_OF_YEAR, days);
return cal.getTime();
}
/**
* Parses passing date with default {@code yyyy-MM-dd} pattern.
*
* @param date is date to be parse
* @return parse date
*/
public static Date parseWithDefaultPattern(String date) {
return parse(date, DEFAULT_PATTERN);
}
public static Date parse(String date, String format) {
try {
return initParserSDF(format).parse(date);
} catch (ParseException e) {
throw new RuntimeException(e);
}
}
/**
* Format passing date with default {@code yyyy-MM-dd} pattern.
*
* @param date is date to be format
* @return format date
*/
public static String formatWithDefaultPattern(Date date) {
return format(date, DEFAULT_PATTERN);
}
public static String format(Date date, String pattern) {
return initParserSDF(pattern).format(date);
}
public static long getCurrentTimeZoneOffset() {
TimeZone tz = TimeZone.getDefault();
return tz.getOffset(getCurrentTimeDate().getTime());
}
private static DateFormat initParserSDF(String pattern) {
final SimpleDateFormat parserSDF = new SimpleDateFormat(pattern);
parserSDF.setCalendar(new GregorianCalendar());
return parserSDF;
}
}