1 /*

     2  * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 /*

    27  * This file is available under and governed by the GNU General Public

    28  * License version 2 only, as published by the Free Software Foundation.

    29  * However, the following notice accompanied the original version of this

    30  * file:

    31  *

    32  * Copyright (c) 2007-2012, Stephen Colebourne & Michael Nascimento Santos

    33  *

    34  * All rights reserved.

    35  *

    36  * Redistribution and use in source and binary forms, with or without

    37  * modification, are permitted provided that the following conditions are met:

    38  *

    39  *  * Redistributions of source code must retain the above copyright notice,

    40  *    this list of conditions and the following disclaimer.

    41  *

    42  *  * Redistributions in binary form must reproduce the above copyright notice,

    43  *    this list of conditions and the following disclaimer in the documentation

    44  *    and/or other materials provided with the distribution.

    45  *

    46  *  * Neither the name of JSR-310 nor the names of its contributors

    47  *    may be used to endorse or promote products derived from this software

    48  *    without specific prior written permission.

    49  *

    50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

    51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

    52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

    53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR

    54  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    55  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    56  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    57  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

    58  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

    59  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

    60  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    61  */

    62 package java.time.chrono;

    63 

    64 import static java.time.temporal.ChronoField.EPOCH_DAY;

    65 

    66 import java.io.IOException;

    67 import java.io.InvalidObjectException;

    68 import java.io.ObjectInput;

    69 import java.io.ObjectOutput;

    70 import java.io.ObjectStreamException;

    71 import java.io.Serializable;

    72 import java.time.DateTimeException;

    73 import java.time.LocalTime;

    74 import java.time.ZoneId;

    75 import java.time.temporal.ChronoField;

    76 import java.time.temporal.ChronoUnit;

    77 import java.time.temporal.Temporal;

    78 import java.time.temporal.TemporalAdjuster;

    79 import java.time.temporal.TemporalField;

    80 import java.time.temporal.TemporalUnit;

    81 import java.time.temporal.ValueRange;

    82 import java.util.Objects;

    83 

    84 /**

    85  * A date-time without a time-zone for the calendar neutral API.

    86  * <p>

    87  * {@code ChronoLocalDateTime} is an immutable date-time object that represents a date-time, often

    88  * viewed as year-month-day-hour-minute-second. This object can also access other

    89  * fields such as day-of-year, day-of-week and week-of-year.

    90  * <p>

    91  * This class stores all date and time fields, to a precision of nanoseconds.

    92  * It does not store or represent a time-zone. For example, the value

    93  * "2nd October 2007 at 13:45.30.123456789" can be stored in an {@code ChronoLocalDateTime}.

    94  *

    95  * <h3>Specification for implementors</h3>

    96  * This class is immutable and thread-safe.

    97  *

    98  * @param <D> the concrete type for the date of this date-time

    99  * @since 1.8

   100  */

   101 final class ChronoLocalDateTimeImpl<D extends ChronoLocalDate<D>>

   102         implements  ChronoLocalDateTime<D>, Temporal, TemporalAdjuster, Serializable {

   103 

   104     /**

   105      * Serialization version.

   106      */

   107     private static final long serialVersionUID = 4556003607393004514L;

   108     /**

   109      * Hours per day.

   110      */

   111     static final int HOURS_PER_DAY = 24;

   112     /**

   113      * Minutes per hour.

   114      */

   115     static final int MINUTES_PER_HOUR = 60;

   116     /**

   117      * Minutes per day.

   118      */

   119     static final int MINUTES_PER_DAY = MINUTES_PER_HOUR * HOURS_PER_DAY;

   120     /**

   121      * Seconds per minute.

   122      */

   123     static final int SECONDS_PER_MINUTE = 60;

   124     /**

   125      * Seconds per hour.

   126      */

   127     static final int SECONDS_PER_HOUR = SECONDS_PER_MINUTE * MINUTES_PER_HOUR;

   128     /**

   129      * Seconds per day.

   130      */

   131     static final int SECONDS_PER_DAY = SECONDS_PER_HOUR * HOURS_PER_DAY;

   132     /**

   133      * Milliseconds per day.

   134      */

   135     static final long MILLIS_PER_DAY = SECONDS_PER_DAY * 1000L;

   136     /**

   137      * Microseconds per day.

   138      */

   139     static final long MICROS_PER_DAY = SECONDS_PER_DAY * 1000_000L;

   140     /**

   141      * Nanos per second.

   142      */

   143     static final long NANOS_PER_SECOND = 1000_000_000L;

   144     /**

   145      * Nanos per minute.

   146      */

   147     static final long NANOS_PER_MINUTE = NANOS_PER_SECOND * SECONDS_PER_MINUTE;

   148     /**

   149      * Nanos per hour.

   150      */

   151     static final long NANOS_PER_HOUR = NANOS_PER_MINUTE * MINUTES_PER_HOUR;

   152     /**

   153      * Nanos per day.

   154      */

   155     static final long NANOS_PER_DAY = NANOS_PER_HOUR * HOURS_PER_DAY;

   156 

   157     /**

   158      * The date part.

   159      */

   160     private final D date;

   161     /**

   162      * The time part.

   163      */

   164     private final LocalTime time;

   165 

   166     //-----------------------------------------------------------------------

   167     /**

   168      * Obtains an instance of {@code ChronoLocalDateTime} from a date and time.

   169      *

   170      * @param date  the local date, not null

   171      * @param time  the local time, not null

   172      * @return the local date-time, not null

   173      */

   174     static ChronoLocalDateTimeImpl<?> of(ChronoLocalDate<?> date, LocalTime time) {

   175         return new ChronoLocalDateTimeImpl(date, time);

   176     }

   177 

   178     /**

   179      * Constructor.

   180      *

   181      * @param date  the date part of the date-time, not null

   182      * @param time  the time part of the date-time, not null

   183      */

   184     private ChronoLocalDateTimeImpl(D date, LocalTime time) {

   185         Objects.requireNonNull(date, "date");

   186         Objects.requireNonNull(time, "time");

   187         this.date = date;

   188         this.time = time;

   189     }

   190 

   191     /**

   192      * Returns a copy of this date-time with the new date and time, checking

   193      * to see if a new object is in fact required.

   194      *

   195      * @param newDate  the date of the new date-time, not null

   196      * @param newTime  the time of the new date-time, not null

   197      * @return the date-time, not null

   198      */

   199     private ChronoLocalDateTimeImpl<D> with(Temporal newDate, LocalTime newTime) {

   200         if (date == newDate && time == newTime) {

   201             return this;

   202         }

   203         // Validate that the new Temporal is a ChronoLocalDate (and not something else)

   204         D cd = (D)date.getChronology().ensureChronoLocalDate(newDate);

   205         return new ChronoLocalDateTimeImpl<>((D)cd, newTime);

   206     }

   207 

   208     //-----------------------------------------------------------------------

   209     @Override

   210     public D toLocalDate() {

   211         return date;

   212     }

   213 

   214     @Override

   215     public LocalTime toLocalTime() {

   216         return time;

   217     }

   218 

   219     //-----------------------------------------------------------------------

   220     @Override

   221     public boolean isSupported(TemporalField field) {

   222         if (field instanceof ChronoField) {

   223             ChronoField f = (ChronoField) field;

   224             return f.isDateField() || f.isTimeField();

   225         }

   226         return field != null && field.isSupportedBy(this);

   227     }

   228 

   229     @Override

   230     public ValueRange range(TemporalField field) {

   231         if (field instanceof ChronoField) {

   232             ChronoField f = (ChronoField) field;

   233             return (f.isTimeField() ? time.range(field) : date.range(field));

   234         }

   235         return field.rangeRefinedBy(this);

   236     }

   237 

   238     @Override

   239     public int get(TemporalField field) {

   240         if (field instanceof ChronoField) {

   241             ChronoField f = (ChronoField) field;

   242             return (f.isTimeField() ? time.get(field) : date.get(field));

   243         }

   244         return range(field).checkValidIntValue(getLong(field), field);

   245     }

   246 

   247     @Override

   248     public long getLong(TemporalField field) {

   249         if (field instanceof ChronoField) {

   250             ChronoField f = (ChronoField) field;

   251             return (f.isTimeField() ? time.getLong(field) : date.getLong(field));

   252         }

   253         return field.getFrom(this);

   254     }

   255 

   256     //-----------------------------------------------------------------------

   257     @SuppressWarnings("unchecked")

   258     @Override

   259     public ChronoLocalDateTimeImpl<D> with(TemporalAdjuster adjuster) {

   260         if (adjuster instanceof ChronoLocalDate) {

   261             // The Chronology is checked in with(date,time)

   262             return with((ChronoLocalDate<D>) adjuster, time);

   263         } else if (adjuster instanceof LocalTime) {

   264             return with(date, (LocalTime) adjuster);

   265         } else if (adjuster instanceof ChronoLocalDateTimeImpl) {

   266             return (ChronoLocalDateTimeImpl<D>)(date.getChronology().ensureChronoLocalDateTime((ChronoLocalDateTimeImpl<?>) adjuster));

   267         }

   268         return (ChronoLocalDateTimeImpl<D>)(date.getChronology().ensureChronoLocalDateTime((ChronoLocalDateTimeImpl<?>) adjuster.adjustInto(this)));

   269     }

   270 

   271     @Override

   272     public ChronoLocalDateTimeImpl<D> with(TemporalField field, long newValue) {

   273         if (field instanceof ChronoField) {

   274             ChronoField f = (ChronoField) field;

   275             if (f.isTimeField()) {

   276                 return with(date, time.with(field, newValue));

   277             } else {

   278                 return with(date.with(field, newValue), time);

   279             }

   280         }

   281         return (ChronoLocalDateTimeImpl<D>)(date.getChronology().ensureChronoLocalDateTime(field.adjustInto(this, newValue)));

   282     }

   283 

   284     //-----------------------------------------------------------------------

   285     @Override

   286     public ChronoLocalDateTimeImpl<D> plus(long amountToAdd, TemporalUnit unit) {

   287         if (unit instanceof ChronoUnit) {

   288             ChronoUnit f = (ChronoUnit) unit;

   289             switch (f) {

   290                 case NANOS: return plusNanos(amountToAdd);

   291                 case MICROS: return plusDays(amountToAdd / MICROS_PER_DAY).plusNanos((amountToAdd % MICROS_PER_DAY) * 1000);

   292                 case MILLIS: return plusDays(amountToAdd / MILLIS_PER_DAY).plusNanos((amountToAdd % MILLIS_PER_DAY) * 1000000);

   293                 case SECONDS: return plusSeconds(amountToAdd);

   294                 case MINUTES: return plusMinutes(amountToAdd);

   295                 case HOURS: return plusHours(amountToAdd);

   296                 case HALF_DAYS: return plusDays(amountToAdd / 256).plusHours((amountToAdd % 256) * 12);  // no overflow (256 is multiple of 2)

   297             }

   298             return with(date.plus(amountToAdd, unit), time);

   299         }

   300         return (ChronoLocalDateTimeImpl<D>)(date.getChronology().ensureChronoLocalDateTime(unit.addTo(this, amountToAdd)));

   301     }

   302 

   303     private ChronoLocalDateTimeImpl<D> plusDays(long days) {

   304         return with(date.plus(days, ChronoUnit.DAYS), time);

   305     }

   306 

   307     private ChronoLocalDateTimeImpl<D> plusHours(long hours) {

   308         return plusWithOverflow(date, hours, 0, 0, 0);

   309     }

   310 

   311     private ChronoLocalDateTimeImpl<D> plusMinutes(long minutes) {

   312         return plusWithOverflow(date, 0, minutes, 0, 0);

   313     }

   314 

   315     ChronoLocalDateTimeImpl<D> plusSeconds(long seconds) {

   316         return plusWithOverflow(date, 0, 0, seconds, 0);

   317     }

   318 

   319     private ChronoLocalDateTimeImpl<D> plusNanos(long nanos) {

   320         return plusWithOverflow(date, 0, 0, 0, nanos);

   321     }

   322 

   323     //-----------------------------------------------------------------------

   324     private ChronoLocalDateTimeImpl<D> plusWithOverflow(ChronoLocalDate<?> newDate, long hours, long minutes, long seconds, long nanos) {

   325         // 9223372036854775808 long, 2147483648 int

   326         if ((hours | minutes | seconds | nanos) == 0) {

   327             return with(newDate, time);

   328         }

   329         long totDays = nanos / NANOS_PER_DAY +             //   max/24*60*60*1B

   330                 seconds / SECONDS_PER_DAY +                //   max/24*60*60

   331                 minutes / MINUTES_PER_DAY +                //   max/24*60

   332                 hours / HOURS_PER_DAY;                     //   max/24

   333         long totNanos = nanos % NANOS_PER_DAY +                    //   max  86400000000000

   334                 (seconds % SECONDS_PER_DAY) * NANOS_PER_SECOND +   //   max  86400000000000

   335                 (minutes % MINUTES_PER_DAY) * NANOS_PER_MINUTE +   //   max  86400000000000

   336                 (hours % HOURS_PER_DAY) * NANOS_PER_HOUR;          //   max  86400000000000

   337         long curNoD = time.toNanoOfDay();                          //   max  86400000000000

   338         totNanos = totNanos + curNoD;                              // total 432000000000000

   339         totDays += Math.floorDiv(totNanos, NANOS_PER_DAY);

   340         long newNoD = Math.floorMod(totNanos, NANOS_PER_DAY);

   341         LocalTime newTime = (newNoD == curNoD ? time : LocalTime.ofNanoOfDay(newNoD));

   342         return with(newDate.plus(totDays, ChronoUnit.DAYS), newTime);

   343     }

   344 

   345     //-----------------------------------------------------------------------

   346     @Override

   347     public ChronoZonedDateTime<D> atZone(ZoneId zone) {

   348         return ChronoZonedDateTimeImpl.ofBest(this, zone, null);

   349     }

   350 

   351     //-----------------------------------------------------------------------

   352     @Override

   353     public long periodUntil(Temporal endDateTime, TemporalUnit unit) {

   354         if (endDateTime instanceof ChronoLocalDateTime == false) {

   355             throw new DateTimeException("Unable to calculate period between objects of two different types");

   356         }

   357         @SuppressWarnings("unchecked")

   358         ChronoLocalDateTime<D> end = (ChronoLocalDateTime<D>) endDateTime;

   359         if (toLocalDate().getChronology().equals(end.toLocalDate().getChronology()) == false) {

   360             throw new DateTimeException("Unable to calculate period between two different chronologies");

   361         }

   362         if (unit instanceof ChronoUnit) {

   363             ChronoUnit f = (ChronoUnit) unit;

   364             if (f.isTimeUnit()) {

   365                 long amount = end.getLong(EPOCH_DAY) - date.getLong(EPOCH_DAY);

   366                 switch (f) {

   367                     case NANOS: amount = Math.multiplyExact(amount, NANOS_PER_DAY); break;

   368                     case MICROS: amount = Math.multiplyExact(amount, MICROS_PER_DAY); break;

   369                     case MILLIS: amount = Math.multiplyExact(amount, MILLIS_PER_DAY); break;

   370                     case SECONDS: amount = Math.multiplyExact(amount, SECONDS_PER_DAY); break;

   371                     case MINUTES: amount = Math.multiplyExact(amount, MINUTES_PER_DAY); break;

   372                     case HOURS: amount = Math.multiplyExact(amount, HOURS_PER_DAY); break;

   373                     case HALF_DAYS: amount = Math.multiplyExact(amount, 2); break;

   374                 }

   375                 return Math.addExact(amount, time.periodUntil(end.toLocalTime(), unit));

   376             }

   377             D endDate = end.toLocalDate();

   378             if (end.toLocalTime().isBefore(time)) {

   379                 endDate = (D)endDate.minus(1, ChronoUnit.DAYS);

   380             }

   381             return date.periodUntil(endDate, unit);

   382         }

   383         return unit.between(this, endDateTime);

   384     }

   385 

   386     //-----------------------------------------------------------------------

   387     private Object writeReplace() {

   388         return new Ser(Ser.CHRONO_LOCAL_DATE_TIME_TYPE, this);

   389     }

   390 

   391     /**

   392      * Defend against malicious streams.

   393      * @return never

   394      * @throws InvalidObjectException always

   395      */

   396     private Object readResolve() throws ObjectStreamException {

   397         throw new InvalidObjectException("Deserialization via serialization delegate");

   398     }

   399 

   400     void writeExternal(ObjectOutput out) throws IOException {

   401         out.writeObject(date);

   402         out.writeObject(time);

   403     }

   404 

   405     static ChronoLocalDateTime<?> readExternal(ObjectInput in) throws IOException, ClassNotFoundException {

   406         ChronoLocalDate date = (ChronoLocalDate) in.readObject();

   407         LocalTime time = (LocalTime) in.readObject();

   408         return date.atTime(time);

   409     }

   410 

   411     //-----------------------------------------------------------------------

   412     @Override

   413     public boolean equals(Object obj) {

   414         if (this == obj) {

   415             return true;

   416         }

   417         if (obj instanceof ChronoLocalDateTime) {

   418             return compareTo((ChronoLocalDateTime<?>) obj) == 0;

   419         }

   420         return false;

   421     }

   422 

   423     @Override

   424     public int hashCode() {

   425         return toLocalDate().hashCode() ^ toLocalTime().hashCode();

   426     }

   427 

   428     @Override

   429     public String toString() {

   430         return toLocalDate().toString() + 'T' + toLocalTime().toString();

   431     }

   432 

   433 }