package org.eclipse.jgit.util;
import java.text.MessageFormat;
import java.util.Date;
import org.eclipse.jgit.internal.JGitText;
public class RelativeDateFormatter {
static final long SECOND_IN_MILLIS = 1000;
static final long MINUTE_IN_MILLIS = 60 * SECOND_IN_MILLIS;
static final long HOUR_IN_MILLIS = 60 * MINUTE_IN_MILLIS;
static final long DAY_IN_MILLIS = 24 * HOUR_IN_MILLIS;
static final long WEEK_IN_MILLIS = 7 * DAY_IN_MILLIS;
static final long MONTH_IN_MILLIS = 30 * DAY_IN_MILLIS;
static final long YEAR_IN_MILLIS = 365 * DAY_IN_MILLIS;
@SuppressWarnings("boxing")
public static String format(Date when) {
long ageMillis = SystemReader.getInstance().getCurrentTime()
- when.getTime();
if (ageMillis < 0)
return JGitText.get().inTheFuture;
if (ageMillis < upperLimit(MINUTE_IN_MILLIS))
return MessageFormat.format(JGitText.get().secondsAgo,
round(ageMillis, SECOND_IN_MILLIS));
if (ageMillis < upperLimit(HOUR_IN_MILLIS))
return MessageFormat.format(JGitText.get().minutesAgo,
round(ageMillis, MINUTE_IN_MILLIS));
if (ageMillis < upperLimit(DAY_IN_MILLIS))
return MessageFormat.format(JGitText.get().hoursAgo,
round(ageMillis, HOUR_IN_MILLIS));
if (ageMillis < 14 * DAY_IN_MILLIS)
return MessageFormat.format(JGitText.get().daysAgo,
round(ageMillis, DAY_IN_MILLIS));
if (ageMillis < 10 * WEEK_IN_MILLIS)
return MessageFormat.format(JGitText.get().weeksAgo,
round(ageMillis, WEEK_IN_MILLIS));
if (ageMillis < YEAR_IN_MILLIS)
return MessageFormat.format(JGitText.get().monthsAgo,
round(ageMillis, MONTH_IN_MILLIS));
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 : "");
return MessageFormat.format(
months == 0 ? JGitText.get().years0MonthsAgo : JGitText
.get().yearsMonthsAgo,
new Object[] { years, yearLabel, months, monthLabel });
}
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;
}
}