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/*
* Copyright (C) 2011, Matthias Sohn <matthias.sohn@sap.com>
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* 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 the Eclipse Foundation, Inc. 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 org.eclipse.jgit.util;
import java.text.MessageFormat;
import java.util.Date;
import org.eclipse.jgit.internal.JGitText;
/**
* Formatter to format timestamps relative to the current time using time units
* in the format defined by {@code git log --relative-date}.
*/
public class RelativeDateFormatter {
final static long SECOND_IN_MILLIS = 1000;
final static long MINUTE_IN_MILLIS = 60 * SECOND_IN_MILLIS;
final static long HOUR_IN_MILLIS = 60 * MINUTE_IN_MILLIS;
final static long DAY_IN_MILLIS = 24 * HOUR_IN_MILLIS;
final static long WEEK_IN_MILLIS = 7 * DAY_IN_MILLIS;
final static long MONTH_IN_MILLIS = 30 * DAY_IN_MILLIS;
final static long YEAR_IN_MILLIS = 365 * DAY_IN_MILLIS;
/**
* Get age of given {@link java.util.Date} compared to now formatted in the
* same relative format as returned by {@code git log --relative-date}
*
* @param when
* {@link java.util.Date} to format
* @return age of given {@link java.util.Date} compared to now formatted in
* the same relative format as returned by
* {@code git log --relative-date}
*/
@SuppressWarnings("boxing")
public static String format(Date when) {
long ageMillis = SystemReader.getInstance().getCurrentTime()
- when.getTime();
// shouldn't happen in a perfect world
if (ageMillis < 0)
return JGitText.get().inTheFuture;
// seconds
if (ageMillis < upperLimit(MINUTE_IN_MILLIS))
return MessageFormat.format(JGitText.get().secondsAgo,
round(ageMillis, SECOND_IN_MILLIS));
// minutes
if (ageMillis < upperLimit(HOUR_IN_MILLIS))
return MessageFormat.format(JGitText.get().minutesAgo,
round(ageMillis, MINUTE_IN_MILLIS));
// hours
if (ageMillis < upperLimit(DAY_IN_MILLIS))
return MessageFormat.format(JGitText.get().hoursAgo,
round(ageMillis, HOUR_IN_MILLIS));
// up to 14 days use days
if (ageMillis < 14 * DAY_IN_MILLIS)
return MessageFormat.format(JGitText.get().daysAgo,
round(ageMillis, DAY_IN_MILLIS));
// up to 10 weeks use weeks
if (ageMillis < 10 * WEEK_IN_MILLIS)
return MessageFormat.format(JGitText.get().weeksAgo,
round(ageMillis, WEEK_IN_MILLIS));
// months
if (ageMillis < YEAR_IN_MILLIS)
return MessageFormat.format(JGitText.get().monthsAgo,
round(ageMillis, MONTH_IN_MILLIS));
// up to 5 years use "year, months" rounded to months
if (ageMillis < 5 * YEAR_IN_MILLIS) {
long years = round(ageMillis, MONTH_IN_MILLIS) / 12;
String yearLabel = (years > 1) ? JGitText.get().years : //
JGitText.get().year;
long months = round(ageMillis - years * YEAR_IN_MILLIS,
MONTH_IN_MILLIS);
String monthLabel = (months > 1) ? JGitText.get().months : //
(months == 1 ? JGitText.get().month : ""); //$NON-NLS-1$
return MessageFormat.format(
months == 0 ? JGitText.get().years0MonthsAgo : JGitText
.get().yearsMonthsAgo,
new Object[] { years, yearLabel, months, monthLabel });
}
// years
return MessageFormat.format(JGitText.get().yearsAgo,
round(ageMillis, YEAR_IN_MILLIS));
}
private static long upperLimit(long unit) {
long limit = unit + unit / 2;
return limit;
}
private static long round(long n, long unit) {
long rounded = (n + unit / 2) / unit;
return rounded;
}
}
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