| /* |
| * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * This file is available under and governed by the GNU General Public |
| * License version 2 only, as published by the Free Software Foundation. |
| * However, the following notice accompanied the original version of this |
| * file: |
| * |
| * Copyright (c) 2007-2012, Stephen Colebourne & Michael Nascimento Santos |
| * |
| * 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 JSR-310 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 build.tools.tzdb; |
| |
| import static build.tools.tzdb.ChronoField.HOUR_OF_DAY; |
| import static build.tools.tzdb.ChronoField.MINUTE_OF_HOUR; |
| import static build.tools.tzdb.ChronoField.SECOND_OF_MINUTE; |
| import static build.tools.tzdb.ChronoField.SECOND_OF_DAY; |
| |
| import java.util.Objects; |
| |
| /** |
| * A time without time-zone in the ISO-8601 calendar system, |
| * such as {@code 10:15:30}. |
| * |
| */ |
| final class LocalTime { |
| |
| /** |
| * The minimum supported {@code LocalTime}, '00:00'. |
| * This is the time of midnight at the start of the day. |
| */ |
| public static final LocalTime MIN; |
| /** |
| * The minimum supported {@code LocalTime}, '23:59:59.999999999'. |
| * This is the time just before midnight at the end of the day. |
| */ |
| public static final LocalTime MAX; |
| /** |
| * The time of midnight at the start of the day, '00:00'. |
| */ |
| public static final LocalTime MIDNIGHT; |
| /** |
| * The time of noon in the middle of the day, '12:00'. |
| */ |
| public static final LocalTime NOON; |
| /** |
| * Constants for the local time of each hour. |
| */ |
| private static final LocalTime[] HOURS = new LocalTime[24]; |
| static { |
| for (int i = 0; i < HOURS.length; i++) { |
| HOURS[i] = new LocalTime(i, 0, 0); |
| } |
| MIDNIGHT = HOURS[0]; |
| NOON = HOURS[12]; |
| MIN = HOURS[0]; |
| MAX = new LocalTime(23, 59, 59); |
| } |
| |
| /** |
| * Hours per day. |
| */ |
| static final int HOURS_PER_DAY = 24; |
| /** |
| * Minutes per hour. |
| */ |
| static final int MINUTES_PER_HOUR = 60; |
| /** |
| * Minutes per day. |
| */ |
| static final int MINUTES_PER_DAY = MINUTES_PER_HOUR * HOURS_PER_DAY; |
| /** |
| * Seconds per minute. |
| */ |
| static final int SECONDS_PER_MINUTE = 60; |
| /** |
| * Seconds per hour. |
| */ |
| static final int SECONDS_PER_HOUR = SECONDS_PER_MINUTE * MINUTES_PER_HOUR; |
| /** |
| * Seconds per day. |
| */ |
| static final int SECONDS_PER_DAY = SECONDS_PER_HOUR * HOURS_PER_DAY; |
| /** |
| * Milliseconds per day. |
| */ |
| static final long MILLIS_PER_DAY = SECONDS_PER_DAY * 1000L; |
| /** |
| * Microseconds per day. |
| */ |
| static final long MICROS_PER_DAY = SECONDS_PER_DAY * 1000_000L; |
| |
| /** |
| * The hour. |
| */ |
| private final byte hour; |
| /** |
| * The minute. |
| */ |
| private final byte minute; |
| /** |
| * The second. |
| */ |
| private final byte second; |
| |
| /** |
| * Obtains an instance of {@code LocalTime} from an hour and minute. |
| * <p> |
| * The second and nanosecond fields will be set to zero by this factory method. |
| * <p> |
| * This factory may return a cached value, but applications must not rely on this. |
| * |
| * @param hour the hour-of-day to represent, from 0 to 23 |
| * @param minute the minute-of-hour to represent, from 0 to 59 |
| * @return the local time, not null |
| * @throws DateTimeException if the value of any field is out of range |
| */ |
| public static LocalTime of(int hour, int minute) { |
| HOUR_OF_DAY.checkValidValue(hour); |
| if (minute == 0) { |
| return HOURS[hour]; // for performance |
| } |
| MINUTE_OF_HOUR.checkValidValue(minute); |
| return new LocalTime(hour, minute, 0); |
| } |
| |
| /** |
| * Obtains an instance of {@code LocalTime} from an hour, minute and second. |
| * <p> |
| * The nanosecond field will be set to zero by this factory method. |
| * <p> |
| * This factory may return a cached value, but applications must not rely on this. |
| * |
| * @param hour the hour-of-day to represent, from 0 to 23 |
| * @param minute the minute-of-hour to represent, from 0 to 59 |
| * @param second the second-of-minute to represent, from 0 to 59 |
| * @return the local time, not null |
| * @throws DateTimeException if the value of any field is out of range |
| */ |
| public static LocalTime of(int hour, int minute, int second) { |
| HOUR_OF_DAY.checkValidValue(hour); |
| if ((minute | second) == 0) { |
| return HOURS[hour]; // for performance |
| } |
| MINUTE_OF_HOUR.checkValidValue(minute); |
| SECOND_OF_MINUTE.checkValidValue(second); |
| return new LocalTime(hour, minute, second); |
| } |
| |
| /** |
| * Obtains an instance of {@code LocalTime} from a second-of-day value. |
| * <p> |
| * This factory may return a cached value, but applications must not rely on this. |
| * |
| * @param secondOfDay the second-of-day, from {@code 0} to {@code 24 * 60 * 60 - 1} |
| * @return the local time, not null |
| * @throws DateTimeException if the second-of-day value is invalid |
| */ |
| public static LocalTime ofSecondOfDay(int secondOfDay) { |
| SECOND_OF_DAY.checkValidValue(secondOfDay); |
| int hours = secondOfDay / SECONDS_PER_HOUR; |
| secondOfDay -= hours * SECONDS_PER_HOUR; |
| int minutes = secondOfDay / SECONDS_PER_MINUTE; |
| secondOfDay -= minutes * SECONDS_PER_MINUTE; |
| return create(hours, minutes, secondOfDay); |
| } |
| |
| |
| /** |
| * Creates a local time from the hour, minute, second and nanosecond fields. |
| * <p> |
| * This factory may return a cached value, but applications must not rely on this. |
| * |
| * @param hour the hour-of-day to represent, validated from 0 to 23 |
| * @param minute the minute-of-hour to represent, validated from 0 to 59 |
| * @param second the second-of-minute to represent, validated from 0 to 59 |
| * @return the local time, not null |
| */ |
| private static LocalTime create(int hour, int minute, int second) { |
| if ((minute | second) == 0) { |
| return HOURS[hour]; |
| } |
| return new LocalTime(hour, minute, second); |
| } |
| |
| /** |
| * Constructor, previously validated. |
| * |
| * @param hour the hour-of-day to represent, validated from 0 to 23 |
| * @param minute the minute-of-hour to represent, validated from 0 to 59 |
| * @param second the second-of-minute to represent, validated from 0 to 59 |
| */ |
| private LocalTime(int hour, int minute, int second) { |
| this.hour = (byte) hour; |
| this.minute = (byte) minute; |
| this.second = (byte) second; |
| } |
| |
| /** |
| * Gets the hour-of-day field. |
| * |
| * @return the hour-of-day, from 0 to 23 |
| */ |
| public int getHour() { |
| return hour; |
| } |
| |
| /** |
| * Gets the minute-of-hour field. |
| * |
| * @return the minute-of-hour, from 0 to 59 |
| */ |
| public int getMinute() { |
| return minute; |
| } |
| |
| /** |
| * Gets the second-of-minute field. |
| * |
| * @return the second-of-minute, from 0 to 59 |
| */ |
| public int getSecond() { |
| return second; |
| } |
| |
| /** |
| * Returns a copy of this {@code LocalTime} with the specified period in seconds added. |
| * <p> |
| * This adds the specified number of seconds to this time, returning a new time. |
| * The calculation wraps around midnight. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param secondstoAdd the seconds to add, may be negative |
| * @return a {@code LocalTime} based on this time with the seconds added, not null |
| */ |
| public LocalTime plusSeconds(long secondstoAdd) { |
| if (secondstoAdd == 0) { |
| return this; |
| } |
| int sofd = hour * SECONDS_PER_HOUR + |
| minute * SECONDS_PER_MINUTE + second; |
| int newSofd = ((int) (secondstoAdd % SECONDS_PER_DAY) + sofd + SECONDS_PER_DAY) % SECONDS_PER_DAY; |
| if (sofd == newSofd) { |
| return this; |
| } |
| int newHour = newSofd / SECONDS_PER_HOUR; |
| int newMinute = (newSofd / SECONDS_PER_MINUTE) % MINUTES_PER_HOUR; |
| int newSecond = newSofd % SECONDS_PER_MINUTE; |
| return create(newHour, newMinute, newSecond); |
| } |
| |
| /** |
| * Returns a copy of this {@code LocalTime} with the specified period in seconds subtracted. |
| * <p> |
| * This subtracts the specified number of seconds from this time, returning a new time. |
| * The calculation wraps around midnight. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param secondsToSubtract the seconds to subtract, may be negative |
| * @return a {@code LocalTime} based on this time with the seconds subtracted, not null |
| */ |
| public LocalTime minusSeconds(long secondsToSubtract) { |
| return plusSeconds(-(secondsToSubtract % SECONDS_PER_DAY)); |
| } |
| |
| /** |
| * Extracts the time as seconds of day, |
| * from {@code 0} to {@code 24 * 60 * 60 - 1}. |
| * |
| * @return the second-of-day equivalent to this time |
| */ |
| public int toSecondOfDay() { |
| int total = hour * SECONDS_PER_HOUR; |
| total += minute * SECONDS_PER_MINUTE; |
| total += second; |
| return total; |
| } |
| |
| /** |
| * Compares this {@code LocalTime} to another time. |
| * <p> |
| * The comparison is based on the time-line position of the local times within a day. |
| * It is "consistent with equals", as defined by {@link Comparable}. |
| * |
| * @param other the other time to compare to, not null |
| * @return the comparator value, negative if less, positive if greater |
| * @throws NullPointerException if {@code other} is null |
| */ |
| public int compareTo(LocalTime other) { |
| int cmp = Integer.compare(hour, other.hour); |
| if (cmp == 0) { |
| cmp = Integer.compare(minute, other.minute); |
| if (cmp == 0) { |
| cmp = Integer.compare(second, other.second); |
| } |
| } |
| return cmp; |
| } |
| |
| /** |
| * Checks if this time is equal to another time. |
| * <p> |
| * The comparison is based on the time-line position of the time within a day. |
| * <p> |
| * Only objects of type {@code LocalTime} are compared, other types return false. |
| * To compare the date of two {@code TemporalAccessor} instances, use |
| * {@link ChronoField#NANO_OF_DAY} as a comparator. |
| * |
| * @param obj the object to check, null returns false |
| * @return true if this is equal to the other time |
| */ |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof LocalTime) { |
| LocalTime other = (LocalTime) obj; |
| return hour == other.hour && minute == other.minute && |
| second == other.second; |
| } |
| return false; |
| } |
| |
| /** |
| * A hash code for this time. |
| * |
| * @return a suitable hash code |
| */ |
| @Override |
| public int hashCode() { |
| long sod = toSecondOfDay(); |
| return (int) (sod ^ (sod >>> 32)); |
| } |
| |
| } |