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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html#License
/*
******************************************************************************
* Copyright (C) 2007, International Business Machines Corporation and *
* others. All Rights Reserved. *
******************************************************************************
*/
package com.ibm.icu.impl.duration;
/**
* 'Enum' for individual time units. Not an actual enum so that it can be
* used by Java 1.4.
*/
public final class TimeUnit {
/** The name of this unit, a key, not for localization. */
final String name;
/** The ordinal of the unit, in order from largest to smallest. */
final byte ordinal;
/** Private constructor */
private TimeUnit(String name, int ordinal) {
this.name = name;
this.ordinal = (byte) ordinal;
}
@Override
public String toString() {
return name;
}
/** Represents a year. */
public static final TimeUnit YEAR = new TimeUnit("year", 0);
/** Represents a month. */
public static final TimeUnit MONTH = new TimeUnit("month", 1);
/** Represents a week. */
public static final TimeUnit WEEK = new TimeUnit("week", 2);
/** Represents a day. */
public static final TimeUnit DAY = new TimeUnit("day", 3);
/** Represents an hour. */
public static final TimeUnit HOUR = new TimeUnit("hour", 4);
/** Represents a minute. */
public static final TimeUnit MINUTE = new TimeUnit("minute", 5);
/** Represents a second. */
public static final TimeUnit SECOND = new TimeUnit("second", 6);
/** Represents a millisecond. */
public static final TimeUnit MILLISECOND = new TimeUnit("millisecond", 7);
/** Returns the next larger time unit, or null if this is the largest. */
public TimeUnit larger() {
return ordinal == 0 ? null : units[ordinal - 1];
}
/** Returns the next smaller time unit, or null if this is the smallest. */
public TimeUnit smaller() {
return ordinal == units.length - 1 ? null : units[ordinal + 1];
}
/** The list of units, in order from largest to smallest. */
static final TimeUnit[] units = {
YEAR, MONTH, WEEK, DAY, HOUR, MINUTE, SECOND, MILLISECOND
};
/** Returns the ordinal value of this time unit, largest is 0. **/
public int ordinal() {
return ordinal;
}
/** Approximate, durations for the units independent of the time at which
they are measured */
// hack, initialization long array using expressions with 'L' at end doesn't
// compute entire expression using 'long'. differs from initializtion of
// a single constant
static final long[] approxDurations = {
36525L*24*60*60*10, 3045*24*60*60*10L, 7*24*60*60*1000L, 24*60*60*1000L,
60*60*1000L, 60*1000L, 1000L, 1L
};
}