| /* |
| * 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.Utils.*; |
| import static build.tools.tzdb.LocalTime.HOURS_PER_DAY; |
| import static build.tools.tzdb.LocalTime.MICROS_PER_DAY; |
| import static build.tools.tzdb.LocalTime.MILLIS_PER_DAY; |
| import static build.tools.tzdb.LocalTime.MINUTES_PER_DAY; |
| import static build.tools.tzdb.LocalTime.SECONDS_PER_DAY; |
| import static build.tools.tzdb.LocalTime.SECONDS_PER_MINUTE; |
| import static build.tools.tzdb.LocalTime.SECONDS_PER_HOUR; |
| |
| import java.util.Objects; |
| |
| /** |
| * A date-time without a time-zone in the ISO-8601 calendar system, |
| * such as {@code 2007-12-03T10:15:30}. |
| * |
| * @since 1.8 |
| */ |
| final class LocalDateTime { |
| |
| /** |
| * The minimum supported {@code LocalDateTime}, '-999999999-01-01T00:00:00'. |
| * This is the local date-time of midnight at the start of the minimum date. |
| * This combines {@link LocalDate#MIN} and {@link LocalTime#MIN}. |
| * This could be used by an application as a "far past" date-time. |
| */ |
| public static final LocalDateTime MIN = LocalDateTime.of(LocalDate.MIN, LocalTime.MIN); |
| /** |
| * The maximum supported {@code LocalDateTime}, '+999999999-12-31T23:59:59.999999999'. |
| * This is the local date-time just before midnight at the end of the maximum date. |
| * This combines {@link LocalDate#MAX} and {@link LocalTime#MAX}. |
| * This could be used by an application as a "far future" date-time. |
| */ |
| public static final LocalDateTime MAX = LocalDateTime.of(LocalDate.MAX, LocalTime.MAX); |
| |
| /** |
| * The date part. |
| */ |
| private final LocalDate date; |
| /** |
| * The time part. |
| */ |
| private final LocalTime time; |
| |
| /** |
| * Obtains an instance of {@code LocalDateTime} from year, month, |
| * day, hour and minute, setting the second and nanosecond to zero. |
| * <p> |
| * The day must be valid for the year and month, otherwise an exception will be thrown. |
| * The second and nanosecond fields will be set to zero. |
| * |
| * @param year the year to represent, from MIN_YEAR to MAX_YEAR |
| * @param month the month-of-year to represent, from 1 (January) to 12 (December) |
| * @param dayOfMonth the day-of-month to represent, from 1 to 31 |
| * @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 date-time, not null |
| * @throws DateTimeException if the value of any field is out of range |
| * @throws DateTimeException if the day-of-month is invalid for the month-year |
| */ |
| public static LocalDateTime of(int year, int month, int dayOfMonth, int hour, int minute) { |
| LocalDate date = LocalDate.of(year, month, dayOfMonth); |
| LocalTime time = LocalTime.of(hour, minute); |
| return new LocalDateTime(date, time); |
| } |
| |
| /** |
| * Obtains an instance of {@code LocalDateTime} from a date and time. |
| * |
| * @param date the local date, not null |
| * @param time the local time, not null |
| * @return the local date-time, not null |
| */ |
| public static LocalDateTime of(LocalDate date, LocalTime time) { |
| Objects.requireNonNull(date, "date"); |
| Objects.requireNonNull(time, "time"); |
| return new LocalDateTime(date, time); |
| } |
| |
| /** |
| * Obtains an instance of {@code LocalDateTime} using seconds from the |
| * epoch of 1970-01-01T00:00:00Z. |
| * <p> |
| * This allows the {@link ChronoField#INSTANT_SECONDS epoch-second} field |
| * to be converted to a local date-time. This is primarily intended for |
| * low-level conversions rather than general application usage. |
| * |
| * @param epochSecond the number of seconds from the epoch of 1970-01-01T00:00:00Z |
| * @param nanoOfSecond the nanosecond within the second, from 0 to 999,999,999 |
| * @param offset the zone offset, not null |
| * @return the local date-time, not null |
| * @throws DateTimeException if the result exceeds the supported range |
| */ |
| public static LocalDateTime ofEpochSecond(long epochSecond, int nanoOfSecond, ZoneOffset offset) { |
| Objects.requireNonNull(offset, "offset"); |
| long localSecond = epochSecond + offset.getTotalSeconds(); // overflow caught later |
| long localEpochDay = floorDiv(localSecond, SECONDS_PER_DAY); |
| int secsOfDay = (int)floorMod(localSecond, SECONDS_PER_DAY); |
| LocalDate date = LocalDate.ofEpochDay(localEpochDay); |
| LocalTime time = LocalTime.ofSecondOfDay(secsOfDay); // ignore nano |
| return new LocalDateTime(date, time); |
| } |
| |
| /** |
| * Constructor. |
| * |
| * @param date the date part of the date-time, validated not null |
| * @param time the time part of the date-time, validated not null |
| */ |
| private LocalDateTime(LocalDate date, LocalTime time) { |
| this.date = date; |
| this.time = time; |
| } |
| |
| /** |
| * Returns a copy of this date-time with the new date and time, checking |
| * to see if a new object is in fact required. |
| * |
| * @param newDate the date of the new date-time, not null |
| * @param newTime the time of the new date-time, not null |
| * @return the date-time, not null |
| */ |
| private LocalDateTime with(LocalDate newDate, LocalTime newTime) { |
| if (date == newDate && time == newTime) { |
| return this; |
| } |
| return new LocalDateTime(newDate, newTime); |
| } |
| |
| /** |
| * Gets the {@code LocalDate} part of this date-time. |
| * <p> |
| * This returns a {@code LocalDate} with the same year, month and day |
| * as this date-time. |
| * |
| * @return the date part of this date-time, not null |
| */ |
| public LocalDate getDate() { |
| return date; |
| } |
| |
| /** |
| * Gets the year field. |
| * <p> |
| * This method returns the primitive {@code int} value for the year. |
| * <p> |
| * The year returned by this method is proleptic as per {@code get(YEAR)}. |
| * To obtain the year-of-era, use {@code get(YEAR_OF_ERA}. |
| * |
| * @return the year, from MIN_YEAR to MAX_YEAR |
| */ |
| public int getYear() { |
| return date.getYear(); |
| } |
| |
| /** |
| * Gets the month-of-year field as an int from 1 to 12. |
| * |
| * @return the month-of-year |
| */ |
| public int getMonth() { |
| return date.getMonth(); |
| } |
| |
| /** |
| * Gets the day-of-month field. |
| * <p> |
| * This method returns the primitive {@code int} value for the day-of-month. |
| * |
| * @return the day-of-month, from 1 to 31 |
| */ |
| public int getDayOfMonth() { |
| return date.getDayOfMonth(); |
| } |
| |
| /** |
| * Gets the day-of-week field, which is an integer from 1 to 7. |
| * |
| * @return the day-of-week, from 1 to 7 |
| */ |
| public int getDayOfWeek() { |
| return date.getDayOfWeek(); |
| } |
| |
| /** |
| * Gets the {@code LocalTime} part of this date-time. |
| * <p> |
| * This returns a {@code LocalTime} with the same hour, minute, second and |
| * nanosecond as this date-time. |
| * |
| * @return the time part of this date-time, not null |
| */ |
| public LocalTime getTime() { |
| return time; |
| } |
| |
| /** |
| * Gets the hour-of-day field. |
| * |
| * @return the hour-of-day, from 0 to 23 |
| */ |
| public int getHour() { |
| return time.getHour(); |
| } |
| |
| /** |
| * Gets the minute-of-hour field. |
| * |
| * @return the minute-of-hour, from 0 to 59 |
| */ |
| public int getMinute() { |
| return time.getMinute(); |
| } |
| |
| /** |
| * Gets the second-of-minute field. |
| * |
| * @return the second-of-minute, from 0 to 59 |
| */ |
| public int getSecond() { |
| return time.getSecond(); |
| } |
| |
| /** |
| * Converts this date-time to the number of seconds from the epoch |
| * of 1970-01-01T00:00:00Z. |
| * <p> |
| * This combines this local date-time and the specified offset to calculate the |
| * epoch-second value, which is the number of elapsed seconds from 1970-01-01T00:00:00Z. |
| * Instants on the time-line after the epoch are positive, earlier are negative. |
| * <p> |
| * This default implementation calculates from the epoch-day of the date and the |
| * second-of-day of the time. |
| * |
| * @param offset the offset to use for the conversion, not null |
| * @return the number of seconds from the epoch of 1970-01-01T00:00:00Z |
| */ |
| public long toEpochSecond(ZoneOffset offset) { |
| Objects.requireNonNull(offset, "offset"); |
| long epochDay = getDate().toEpochDay(); |
| long secs = epochDay * 86400 + getTime().toSecondOfDay(); |
| secs -= offset.getTotalSeconds(); |
| return secs; |
| } |
| |
| /** |
| * Returns a copy of this {@code LocalDateTime} with the specified period in days added. |
| * <p> |
| * This method adds the specified amount to the days field incrementing the |
| * month and year fields as necessary to ensure the result remains valid. |
| * The result is only invalid if the maximum/minimum year is exceeded. |
| * <p> |
| * For example, 2008-12-31 plus one day would result in 2009-01-01. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param days the days to add, may be negative |
| * @return a {@code LocalDateTime} based on this date-time with the days added, not null |
| * @throws DateTimeException if the result exceeds the supported date range |
| */ |
| public LocalDateTime plusDays(long days) { |
| LocalDate newDate = date.plusDays(days); |
| return with(newDate, time); |
| } |
| |
| /** |
| * Returns a copy of this {@code LocalDateTime} with the specified period in seconds added. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param seconds the seconds to add, may be negative |
| * @return a {@code LocalDateTime} based on this date-time with the seconds added, not null |
| * @throws DateTimeException if the result exceeds the supported date range |
| */ |
| public LocalDateTime plusSeconds(long seconds) { |
| return plusWithOverflow(date, 0, 0, seconds, 1); |
| } |
| |
| /** |
| * Returns a copy of this {@code LocalDateTime} with the specified period added. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param newDate the new date to base the calculation on, not null |
| * @param hours the hours to add, may be negative |
| * @param minutes the minutes to add, may be negative |
| * @param seconds the seconds to add, may be negative |
| * @param nanos the nanos to add, may be negative |
| * @param sign the sign to determine add or subtract |
| * @return the combined result, not null |
| */ |
| private LocalDateTime plusWithOverflow(LocalDate newDate, long hours, long minutes, long seconds, int sign) { |
| if ((hours | minutes | seconds) == 0) { |
| return with(newDate, time); |
| } |
| long totDays = seconds / SECONDS_PER_DAY + // max/24*60*60 |
| minutes / MINUTES_PER_DAY + // max/24*60 |
| hours / HOURS_PER_DAY; // max/24 |
| totDays *= sign; // total max*0.4237... |
| long totSecs = (seconds % SECONDS_PER_DAY) + |
| (minutes % MINUTES_PER_DAY) * SECONDS_PER_MINUTE + |
| (hours % HOURS_PER_DAY) * SECONDS_PER_HOUR; |
| long curSoD = time.toSecondOfDay(); |
| totSecs = totSecs * sign + curSoD; // total 432000000000000 |
| totDays += floorDiv(totSecs, SECONDS_PER_DAY); |
| |
| int newSoD = (int)floorMod(totSecs, SECONDS_PER_DAY); |
| LocalTime newTime = (newSoD == curSoD ? time : LocalTime.ofSecondOfDay(newSoD)); |
| return with(newDate.plusDays(totDays), newTime); |
| } |
| |
| /** |
| * Compares this date-time to another date-time. |
| * <p> |
| * The comparison is primarily based on the date-time, from earliest to latest. |
| * It is "consistent with equals", as defined by {@link Comparable}. |
| * <p> |
| * If all the date-times being compared are instances of {@code LocalDateTime}, |
| * then the comparison will be entirely based on the date-time. |
| * If some dates being compared are in different chronologies, then the |
| * chronology is also considered, see {@link ChronoLocalDateTime#compareTo}. |
| * |
| * @param other the other date-time to compare to, not null |
| * @return the comparator value, negative if less, positive if greater |
| */ |
| public int compareTo(LocalDateTime other) { |
| int cmp = date.compareTo(other.getDate()); |
| if (cmp == 0) { |
| cmp = time.compareTo(other.getTime()); |
| } |
| return cmp; |
| } |
| |
| /** |
| * Checks if this date-time is equal to another date-time. |
| * <p> |
| * Compares this {@code LocalDateTime} with another ensuring that the date-time is the same. |
| * Only objects of type {@code LocalDateTime} are compared, other types return false. |
| * |
| * @param obj the object to check, null returns false |
| * @return true if this is equal to the other date-time |
| */ |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof LocalDateTime) { |
| LocalDateTime other = (LocalDateTime) obj; |
| return date.equals(other.date) && time.equals(other.time); |
| } |
| return false; |
| } |
| |
| /** |
| * A hash code for this date-time. |
| * |
| * @return a suitable hash code |
| */ |
| @Override |
| public int hashCode() { |
| return date.hashCode() ^ time.hashCode(); |
| } |
| |
| } |
