1 /*
2 * Copyright (c) 2012, 2019, 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.ObjectInputStream;
70 import java.io.ObjectOutput;
71 import java.io.Serializable;
72 import java.time.LocalTime;
73 import java.time.ZoneId;
74 import java.time.temporal.ChronoField;
75 import java.time.temporal.ChronoUnit;
76 import java.time.temporal.Temporal;
77 import java.time.temporal.TemporalAdjuster;
78 import java.time.temporal.TemporalField;
79 import java.time.temporal.TemporalUnit;
80 import java.time.temporal.ValueRange;
81 import java.util.Objects;
82
83 /**
84 * A date-time without a time-zone for the calendar neutral API.
85 * <p>
86 * {@code ChronoLocalDateTime} is an immutable date-time object that represents a date-time, often
87 * viewed as year-month-day-hour-minute-second. This object can also access other
88 * fields such as day-of-year, day-of-week and week-of-year.
89 * <p>
90 * This class stores all date and time fields, to a precision of nanoseconds.
91 * It does not store or represent a time-zone. For example, the value
92 * "2nd October 2007 at 13:45.30.123456789" can be stored in an {@code ChronoLocalDateTime}.
93 *
94 * @implSpec
95 * This class is immutable and thread-safe.
96 * @serial
97 * @param <D> the concrete type for the date of this date-time
98 * @since 1.8
99 */
100 final class ChronoLocalDateTimeImpl<D extends ChronoLocalDate>
101 implements ChronoLocalDateTime<D>, Temporal, TemporalAdjuster, Serializable {
102
103 /**
104 * Serialization version.
105 */
106 @java.io.Serial
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 transient D date;
161 /**
162 * The time part.
163 */
164 private final transient 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 <R extends ChronoLocalDate> ChronoLocalDateTimeImpl<R> of(R date, LocalTime time) {
175 return new ChronoLocalDateTimeImpl<>(date, time);
176 }
177
178 /**
179 * Casts the {@code Temporal} to {@code ChronoLocalDateTime} ensuring it bas the specified chronology.
180 *
181 * @param chrono the chronology to check for, not null
182 * @param temporal a date-time to cast, not null
183 * @return the date-time checked and cast to {@code ChronoLocalDateTime}, not null
184 * @throws ClassCastException if the date-time cannot be cast to ChronoLocalDateTimeImpl
185 * or the chronology is not equal this Chronology
186 */
187 static <R extends ChronoLocalDate> ChronoLocalDateTimeImpl<R> ensureValid(Chronology chrono, Temporal temporal) {
188 @SuppressWarnings("unchecked")
189 ChronoLocalDateTimeImpl<R> other = (ChronoLocalDateTimeImpl<R>) temporal;
190 if (chrono.equals(other.getChronology()) == false) {
191 throw new ClassCastException("Chronology mismatch, required: " + chrono.getId()
192 + ", actual: " + other.getChronology().getId());
193 }
194 return other;
195 }
196
197 /**
198 * Constructor.
199 *
200 * @param date the date part of the date-time, not null
201 * @param time the time part of the date-time, not null
202 */
203 private ChronoLocalDateTimeImpl(D date, LocalTime time) {
204 Objects.requireNonNull(date, "date");
205 Objects.requireNonNull(time, "time");
206 this.date = date;
207 this.time = time;
208 }
209
210 /**
211 * Returns a copy of this date-time with the new date and time, checking
212 * to see if a new object is in fact required.
213 *
214 * @param newDate the date of the new date-time, not null
215 * @param newTime the time of the new date-time, not null
216 * @return the date-time, not null
217 */
218 private ChronoLocalDateTimeImpl<D> with(Temporal newDate, LocalTime newTime) {
219 if (date == newDate && time == newTime) {
220 return this;
221 }
222 // Validate that the new Temporal is a ChronoLocalDate (and not something else)
223 D cd = ChronoLocalDateImpl.ensureValid(date.getChronology(), newDate);
224 return new ChronoLocalDateTimeImpl<>(cd, newTime);
225 }
226
227 //-----------------------------------------------------------------------
228 @Override
229 public D toLocalDate() {
230 return date;
231 }
232
233 @Override
234 public LocalTime toLocalTime() {
235 return time;
236 }
237
238 //-----------------------------------------------------------------------
239 @Override
240 public boolean isSupported(TemporalField field) {
241 if (field instanceof ChronoField) {
242 ChronoField f = (ChronoField) field;
243 return f.isDateBased() || f.isTimeBased();
244 }
245 return field != null && field.isSupportedBy(this);
246 }
247
248 @Override
249 public ValueRange range(TemporalField field) {
250 if (field instanceof ChronoField) {
251 ChronoField f = (ChronoField) field;
252 return (f.isTimeBased() ? time.range(field) : date.range(field));
253 }
254 return field.rangeRefinedBy(this);
255 }
256
257 @Override
258 public int get(TemporalField field) {
259 if (field instanceof ChronoField) {
260 ChronoField f = (ChronoField) field;
261 return (f.isTimeBased() ? time.get(field) : date.get(field));
262 }
263 return range(field).checkValidIntValue(getLong(field), field);
264 }
265
266 @Override
267 public long getLong(TemporalField field) {
268 if (field instanceof ChronoField) {
269 ChronoField f = (ChronoField) field;
270 return (f.isTimeBased() ? time.getLong(field) : date.getLong(field));
271 }
272 return field.getFrom(this);
273 }
274
275 //-----------------------------------------------------------------------
276 @SuppressWarnings("unchecked")
277 @Override
278 public ChronoLocalDateTimeImpl<D> with(TemporalAdjuster adjuster) {
279 if (adjuster instanceof ChronoLocalDate) {
280 // The Chronology is checked in with(date,time)
281 return with((ChronoLocalDate) adjuster, time);
282 } else if (adjuster instanceof LocalTime) {
283 return with(date, (LocalTime) adjuster);
284 } else if (adjuster instanceof ChronoLocalDateTimeImpl) {
285 return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), (ChronoLocalDateTimeImpl<?>) adjuster);
286 }
287 return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), (ChronoLocalDateTimeImpl<?>) adjuster.adjustInto(this));
288 }
289
290 @Override
291 public ChronoLocalDateTimeImpl<D> with(TemporalField field, long newValue) {
292 if (field instanceof ChronoField) {
293 ChronoField f = (ChronoField) field;
294 if (f.isTimeBased()) {
295 return with(date, time.with(field, newValue));
296 } else {
297 return with(date.with(field, newValue), time);
298 }
299 }
300 return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), field.adjustInto(this, newValue));
301 }
302
303 //-----------------------------------------------------------------------
304 @Override
305 public ChronoLocalDateTimeImpl<D> plus(long amountToAdd, TemporalUnit unit) {
306 if (unit instanceof ChronoUnit) {
307 ChronoUnit f = (ChronoUnit) unit;
308 switch (f) {
309 case NANOS: return plusNanos(amountToAdd);
310 case MICROS: return plusDays(amountToAdd / MICROS_PER_DAY).plusNanos((amountToAdd % MICROS_PER_DAY) * 1000);
311 case MILLIS: return plusDays(amountToAdd / MILLIS_PER_DAY).plusNanos((amountToAdd % MILLIS_PER_DAY) * 1000000);
312 case SECONDS: return plusSeconds(amountToAdd);
313 case MINUTES: return plusMinutes(amountToAdd);
314 case HOURS: return plusHours(amountToAdd);
315 case HALF_DAYS: return plusDays(amountToAdd / 256).plusHours((amountToAdd % 256) * 12); // no overflow (256 is multiple of 2)
316 }
317 return with(date.plus(amountToAdd, unit), time);
318 }
319 return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), unit.addTo(this, amountToAdd));
320 }
321
322 private ChronoLocalDateTimeImpl<D> plusDays(long days) {
323 return with(date.plus(days, ChronoUnit.DAYS), time);
324 }
325
326 private ChronoLocalDateTimeImpl<D> plusHours(long hours) {
327 return plusWithOverflow(date, hours, 0, 0, 0);
328 }
329
330 private ChronoLocalDateTimeImpl<D> plusMinutes(long minutes) {
331 return plusWithOverflow(date, 0, minutes, 0, 0);
332 }
333
334 ChronoLocalDateTimeImpl<D> plusSeconds(long seconds) {
335 return plusWithOverflow(date, 0, 0, seconds, 0);
336 }
337
338 private ChronoLocalDateTimeImpl<D> plusNanos(long nanos) {
339 return plusWithOverflow(date, 0, 0, 0, nanos);
340 }
341
342 //-----------------------------------------------------------------------
343 private ChronoLocalDateTimeImpl<D> plusWithOverflow(D newDate, long hours, long minutes, long seconds, long nanos) {
344 // 9223372036854775808 long, 2147483648 int
345 if ((hours | minutes | seconds | nanos) == 0) {
346 return with(newDate, time);
347 }
348 long totDays = nanos / NANOS_PER_DAY + // max/24*60*60*1B
349 seconds / SECONDS_PER_DAY + // max/24*60*60
350 minutes / MINUTES_PER_DAY + // max/24*60
351 hours / HOURS_PER_DAY; // max/24
352 long totNanos = nanos % NANOS_PER_DAY + // max 86400000000000
353 (seconds % SECONDS_PER_DAY) * NANOS_PER_SECOND + // max 86400000000000
354 (minutes % MINUTES_PER_DAY) * NANOS_PER_MINUTE + // max 86400000000000
355 (hours % HOURS_PER_DAY) * NANOS_PER_HOUR; // max 86400000000000
356 long curNoD = time.toNanoOfDay(); // max 86400000000000
357 totNanos = totNanos + curNoD; // total 432000000000000
358 totDays += Math.floorDiv(totNanos, NANOS_PER_DAY);
359 long newNoD = Math.floorMod(totNanos, NANOS_PER_DAY);
360 LocalTime newTime = (newNoD == curNoD ? time : LocalTime.ofNanoOfDay(newNoD));
361 return with(newDate.plus(totDays, ChronoUnit.DAYS), newTime);
362 }
363
364 //-----------------------------------------------------------------------
365 @Override
366 public ChronoZonedDateTime<D> atZone(ZoneId zone) {
367 return ChronoZonedDateTimeImpl.ofBest(this, zone, null);
368 }
369
370 //-----------------------------------------------------------------------
371 @Override
372 public long until(Temporal endExclusive, TemporalUnit unit) {
373 Objects.requireNonNull(endExclusive, "endExclusive");
374 @SuppressWarnings("unchecked")
375 ChronoLocalDateTime<D> end = (ChronoLocalDateTime<D>) getChronology().localDateTime(endExclusive);
376 if (unit instanceof ChronoUnit) {
377 if (unit.isTimeBased()) {
378 long amount = end.getLong(EPOCH_DAY) - date.getLong(EPOCH_DAY);
379 switch ((ChronoUnit) unit) {
380 case NANOS: amount = Math.multiplyExact(amount, NANOS_PER_DAY); break;
381 case MICROS: amount = Math.multiplyExact(amount, MICROS_PER_DAY); break;
382 case MILLIS: amount = Math.multiplyExact(amount, MILLIS_PER_DAY); break;
383 case SECONDS: amount = Math.multiplyExact(amount, SECONDS_PER_DAY); break;
384 case MINUTES: amount = Math.multiplyExact(amount, MINUTES_PER_DAY); break;
385 case HOURS: amount = Math.multiplyExact(amount, HOURS_PER_DAY); break;
386 case HALF_DAYS: amount = Math.multiplyExact(amount, 2); break;
387 }
388 return Math.addExact(amount, time.until(end.toLocalTime(), unit));
389 }
390 ChronoLocalDate endDate = end.toLocalDate();
391 if (end.toLocalTime().isBefore(time)) {
392 endDate = endDate.minus(1, ChronoUnit.DAYS);
393 }
394 return date.until(endDate, unit);
395 }
396 Objects.requireNonNull(unit, "unit");
397 return unit.between(this, end);
398 }
399
400 //-----------------------------------------------------------------------
401 /**
402 * Writes the ChronoLocalDateTime using a
403 * <a href="{@docRoot}/serialized-form.html#java.time.chrono.Ser">dedicated serialized form</a>.
404 * @serialData
405 * <pre>
406 * out.writeByte(2); // identifies a ChronoLocalDateTime
407 * out.writeObject(toLocalDate());
408 * out.writeObject(toLocalTime());
409 * </pre>
410 *
411 * @return the instance of {@code Ser}, not null
412 */
413 @java.io.Serial
414 private Object writeReplace() {
415 return new Ser(Ser.CHRONO_LOCAL_DATE_TIME_TYPE, this);
416 }
417
418 /**
419 * Defend against malicious streams.
420 *
421 * @param s the stream to read
422 * @throws InvalidObjectException always
423 */
424 @java.io.Serial
425 private void readObject(ObjectInputStream s) throws InvalidObjectException {
426 throw new InvalidObjectException("Deserialization via serialization delegate");
427 }
428
429 void writeExternal(ObjectOutput out) throws IOException {
430 out.writeObject(date);
431 out.writeObject(time);
432 }
433
434 static ChronoLocalDateTime<?> readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
435 ChronoLocalDate date = (ChronoLocalDate) in.readObject();
436 LocalTime time = (LocalTime) in.readObject();
437 return date.atTime(time);
438 }
439
440 //-----------------------------------------------------------------------
441 @Override
442 public boolean equals(Object obj) {
443 if (this == obj) {
444 return true;
445 }
446 if (obj instanceof ChronoLocalDateTime) {
447 return compareTo((ChronoLocalDateTime<?>) obj) == 0;
448 }
449 return false;
450 }
451
452 @Override
453 public int hashCode() {
454 return toLocalDate().hashCode() ^ toLocalTime().hashCode();
455 }
456
457 @Override
458 public String toString() {
459 return toLocalDate().toString() + 'T' + toLocalTime().toString();
460 }
461
462 }