1 /*
2 * Copyright (c) 2012, 2018, 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 private static final long serialVersionUID = 4556003607393004514L;
107 /**
108 * Hours per day.
109 */
110 static final int HOURS_PER_DAY = 24;
111 /**
112 * Minutes per hour.
113 */
114 static final int MINUTES_PER_HOUR = 60;
115 /**
116 * Minutes per day.
117 */
118 static final int MINUTES_PER_DAY = MINUTES_PER_HOUR * HOURS_PER_DAY;
119 /**
120 * Seconds per minute.
121 */
122 static final int SECONDS_PER_MINUTE = 60;
123 /**
124 * Seconds per hour.
125 */
126 static final int SECONDS_PER_HOUR = SECONDS_PER_MINUTE * MINUTES_PER_HOUR;
127 /**
128 * Seconds per day.
129 */
130 static final int SECONDS_PER_DAY = SECONDS_PER_HOUR * HOURS_PER_DAY;
131 /**
132 * Milliseconds per day.
133 */
134 static final long MILLIS_PER_DAY = SECONDS_PER_DAY * 1000L;
135 /**
136 * Microseconds per day.
137 */
138 static final long MICROS_PER_DAY = SECONDS_PER_DAY * 1000_000L;
139 /**
140 * Nanos per second.
141 */
142 static final long NANOS_PER_SECOND = 1000_000_000L;
143 /**
144 * Nanos per minute.
145 */
146 static final long NANOS_PER_MINUTE = NANOS_PER_SECOND * SECONDS_PER_MINUTE;
147 /**
148 * Nanos per hour.
149 */
150 static final long NANOS_PER_HOUR = NANOS_PER_MINUTE * MINUTES_PER_HOUR;
151 /**
152 * Nanos per day.
153 */
154 static final long NANOS_PER_DAY = NANOS_PER_HOUR * HOURS_PER_DAY;
155
156 /**
157 * The date part.
158 */
159 private final transient D date;
160 /**
161 * The time part.
162 */
163 private final transient LocalTime time;
164
165 //-----------------------------------------------------------------------
166 /**
167 * Obtains an instance of {@code ChronoLocalDateTime} from a date and time.
168 *
169 * @param date the local date, not null
170 * @param time the local time, not null
171 * @return the local date-time, not null
172 */
173 static <R extends ChronoLocalDate> ChronoLocalDateTimeImpl<R> of(R date, LocalTime time) {
174 return new ChronoLocalDateTimeImpl<>(date, time);
175 }
176
177 /**
178 * Casts the {@code Temporal} to {@code ChronoLocalDateTime} ensuring it bas the specified chronology.
179 *
180 * @param chrono the chronology to check for, not null
181 * @param temporal a date-time to cast, not null
182 * @return the date-time checked and cast to {@code ChronoLocalDateTime}, not null
183 * @throws ClassCastException if the date-time cannot be cast to ChronoLocalDateTimeImpl
184 * or the chronology is not equal this Chronology
185 */
186 static <R extends ChronoLocalDate> ChronoLocalDateTimeImpl<R> ensureValid(Chronology chrono, Temporal temporal) {
187 @SuppressWarnings("unchecked")
188 ChronoLocalDateTimeImpl<R> other = (ChronoLocalDateTimeImpl<R>) temporal;
189 if (chrono.equals(other.getChronology()) == false) {
190 throw new ClassCastException("Chronology mismatch, required: " + chrono.getId()
191 + ", actual: " + other.getChronology().getId());
192 }
193 return other;
194 }
195
196 /**
197 * Constructor.
198 *
199 * @param date the date part of the date-time, not null
200 * @param time the time part of the date-time, not null
201 */
202 private ChronoLocalDateTimeImpl(D date, LocalTime time) {
203 Objects.requireNonNull(date, "date");
204 Objects.requireNonNull(time, "time");
205 this.date = date;
206 this.time = time;
207 }
208
209 /**
210 * Returns a copy of this date-time with the new date and time, checking
211 * to see if a new object is in fact required.
212 *
213 * @param newDate the date of the new date-time, not null
214 * @param newTime the time of the new date-time, not null
215 * @return the date-time, not null
216 */
217 private ChronoLocalDateTimeImpl<D> with(Temporal newDate, LocalTime newTime) {
218 if (date == newDate && time == newTime) {
219 return this;
220 }
221 // Validate that the new Temporal is a ChronoLocalDate (and not something else)
222 D cd = ChronoLocalDateImpl.ensureValid(date.getChronology(), newDate);
223 return new ChronoLocalDateTimeImpl<>(cd, newTime);
224 }
225
226 //-----------------------------------------------------------------------
227 @Override
228 public D toLocalDate() {
229 return date;
230 }
231
232 @Override
233 public LocalTime toLocalTime() {
234 return time;
235 }
236
237 //-----------------------------------------------------------------------
238 @Override
239 public boolean isSupported(TemporalField field) {
240 if (field instanceof ChronoField) {
241 ChronoField f = (ChronoField) field;
242 return f.isDateBased() || f.isTimeBased();
243 }
244 return field != null && field.isSupportedBy(this);
245 }
246
247 @Override
248 public ValueRange range(TemporalField field) {
249 if (field instanceof ChronoField) {
250 ChronoField f = (ChronoField) field;
251 return (f.isTimeBased() ? time.range(field) : date.range(field));
252 }
253 return field.rangeRefinedBy(this);
254 }
255
256 @Override
257 public int get(TemporalField field) {
258 if (field instanceof ChronoField) {
259 ChronoField f = (ChronoField) field;
260 return (f.isTimeBased() ? time.get(field) : date.get(field));
261 }
262 return range(field).checkValidIntValue(getLong(field), field);
263 }
264
265 @Override
266 public long getLong(TemporalField field) {
267 if (field instanceof ChronoField) {
268 ChronoField f = (ChronoField) field;
269 return (f.isTimeBased() ? time.getLong(field) : date.getLong(field));
270 }
271 return field.getFrom(this);
272 }
273
274 //-----------------------------------------------------------------------
275 @SuppressWarnings("unchecked")
276 @Override
277 public ChronoLocalDateTimeImpl<D> with(TemporalAdjuster adjuster) {
278 if (adjuster instanceof ChronoLocalDate) {
279 // The Chronology is checked in with(date,time)
280 return with((ChronoLocalDate) adjuster, time);
281 } else if (adjuster instanceof LocalTime) {
282 return with(date, (LocalTime) adjuster);
283 } else if (adjuster instanceof ChronoLocalDateTimeImpl) {
284 return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), (ChronoLocalDateTimeImpl<?>) adjuster);
285 }
286 return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), (ChronoLocalDateTimeImpl<?>) adjuster.adjustInto(this));
287 }
288
289 @Override
290 public ChronoLocalDateTimeImpl<D> with(TemporalField field, long newValue) {
291 if (field instanceof ChronoField) {
292 ChronoField f = (ChronoField) field;
293 if (f.isTimeBased()) {
294 return with(date, time.with(field, newValue));
295 } else {
296 return with(date.with(field, newValue), time);
297 }
298 }
299 return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), field.adjustInto(this, newValue));
300 }
301
302 //-----------------------------------------------------------------------
303 @Override
304 public ChronoLocalDateTimeImpl<D> plus(long amountToAdd, TemporalUnit unit) {
305 if (unit instanceof ChronoUnit) {
306 ChronoUnit f = (ChronoUnit) unit;
307 switch (f) {
308 case NANOS: return plusNanos(amountToAdd);
309 case MICROS: return plusDays(amountToAdd / MICROS_PER_DAY).plusNanos((amountToAdd % MICROS_PER_DAY) * 1000);
310 case MILLIS: return plusDays(amountToAdd / MILLIS_PER_DAY).plusNanos((amountToAdd % MILLIS_PER_DAY) * 1000000);
311 case SECONDS: return plusSeconds(amountToAdd);
312 case MINUTES: return plusMinutes(amountToAdd);
313 case HOURS: return plusHours(amountToAdd);
314 case HALF_DAYS: return plusDays(amountToAdd / 256).plusHours((amountToAdd % 256) * 12); // no overflow (256 is multiple of 2)
315 }
316 return with(date.plus(amountToAdd, unit), time);
317 }
318 return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), unit.addTo(this, amountToAdd));
319 }
320
321 private ChronoLocalDateTimeImpl<D> plusDays(long days) {
322 return with(date.plus(days, ChronoUnit.DAYS), time);
323 }
324
325 private ChronoLocalDateTimeImpl<D> plusHours(long hours) {
326 return plusWithOverflow(date, hours, 0, 0, 0);
327 }
328
329 private ChronoLocalDateTimeImpl<D> plusMinutes(long minutes) {
330 return plusWithOverflow(date, 0, minutes, 0, 0);
331 }
332
333 ChronoLocalDateTimeImpl<D> plusSeconds(long seconds) {
334 return plusWithOverflow(date, 0, 0, seconds, 0);
335 }
336
337 private ChronoLocalDateTimeImpl<D> plusNanos(long nanos) {
338 return plusWithOverflow(date, 0, 0, 0, nanos);
339 }
340
341 //-----------------------------------------------------------------------
342 private ChronoLocalDateTimeImpl<D> plusWithOverflow(D newDate, long hours, long minutes, long seconds, long nanos) {
343 // 9223372036854775808 long, 2147483648 int
344 if ((hours | minutes | seconds | nanos) == 0) {
345 return with(newDate, time);
346 }
347 long totDays = nanos / NANOS_PER_DAY + // max/24*60*60*1B
348 seconds / SECONDS_PER_DAY + // max/24*60*60
349 minutes / MINUTES_PER_DAY + // max/24*60
350 hours / HOURS_PER_DAY; // max/24
351 long totNanos = nanos % NANOS_PER_DAY + // max 86400000000000
352 (seconds % SECONDS_PER_DAY) * NANOS_PER_SECOND + // max 86400000000000
353 (minutes % MINUTES_PER_DAY) * NANOS_PER_MINUTE + // max 86400000000000
354 (hours % HOURS_PER_DAY) * NANOS_PER_HOUR; // max 86400000000000
355 long curNoD = time.toNanoOfDay(); // max 86400000000000
356 totNanos = totNanos + curNoD; // total 432000000000000
357 totDays += Math.floorDiv(totNanos, NANOS_PER_DAY);
358 long newNoD = Math.floorMod(totNanos, NANOS_PER_DAY);
359 LocalTime newTime = (newNoD == curNoD ? time : LocalTime.ofNanoOfDay(newNoD));
360 return with(newDate.plus(totDays, ChronoUnit.DAYS), newTime);
361 }
362
363 //-----------------------------------------------------------------------
364 @Override
365 public ChronoZonedDateTime<D> atZone(ZoneId zone) {
366 return ChronoZonedDateTimeImpl.ofBest(this, zone, null);
367 }
368
369 //-----------------------------------------------------------------------
370 @Override
371 public long until(Temporal endExclusive, TemporalUnit unit) {
372 Objects.requireNonNull(endExclusive, "endExclusive");
373 @SuppressWarnings("unchecked")
374 ChronoLocalDateTime<D> end = (ChronoLocalDateTime<D>) getChronology().localDateTime(endExclusive);
375 if (unit instanceof ChronoUnit) {
376 if (unit.isTimeBased()) {
377 long amount = end.getLong(EPOCH_DAY) - date.getLong(EPOCH_DAY);
378 switch ((ChronoUnit) unit) {
379 case NANOS: amount = Math.multiplyExact(amount, NANOS_PER_DAY); break;
380 case MICROS: amount = Math.multiplyExact(amount, MICROS_PER_DAY); break;
381 case MILLIS: amount = Math.multiplyExact(amount, MILLIS_PER_DAY); break;
382 case SECONDS: amount = Math.multiplyExact(amount, SECONDS_PER_DAY); break;
383 case MINUTES: amount = Math.multiplyExact(amount, MINUTES_PER_DAY); break;
384 case HOURS: amount = Math.multiplyExact(amount, HOURS_PER_DAY); break;
385 case HALF_DAYS: amount = Math.multiplyExact(amount, 2); break;
386 }
387 return Math.addExact(amount, time.until(end.toLocalTime(), unit));
388 }
389 ChronoLocalDate endDate = end.toLocalDate();
390 if (end.toLocalTime().isBefore(time)) {
391 endDate = endDate.minus(1, ChronoUnit.DAYS);
392 }
393 return date.until(endDate, unit);
394 }
395 Objects.requireNonNull(unit, "unit");
396 return unit.between(this, end);
397 }
398
399 //-----------------------------------------------------------------------
400 /**
401 * Writes the ChronoLocalDateTime using a
402 * <a href="{@docRoot}/serialized-form.html#java.time.chrono.Ser">dedicated serialized form</a>.
403 * @serialData
404 * <pre>
405 * out.writeByte(2); // identifies a ChronoLocalDateTime
406 * out.writeObject(toLocalDate());
407 * out.witeObject(toLocalTime());
408 * </pre>
409 *
410 * @return the instance of {@code Ser}, not null
411 */
412 private Object writeReplace() {
413 return new Ser(Ser.CHRONO_LOCAL_DATE_TIME_TYPE, this);
414 }
415
416 /**
417 * Defend against malicious streams.
418 *
419 * @param s the stream to read
420 * @throws InvalidObjectException always
421 */
422 private void readObject(ObjectInputStream s) throws InvalidObjectException {
423 throw new InvalidObjectException("Deserialization via serialization delegate");
424 }
425
426 void writeExternal(ObjectOutput out) throws IOException {
427 out.writeObject(date);
428 out.writeObject(time);
429 }
430
431 static ChronoLocalDateTime<?> readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
432 ChronoLocalDate date = (ChronoLocalDate) in.readObject();
433 LocalTime time = (LocalTime) in.readObject();
434 return date.atTime(time);
435 }
436
437 //-----------------------------------------------------------------------
438 @Override
439 public boolean equals(Object obj) {
440 if (this == obj) {
441 return true;
442 }
443 if (obj instanceof ChronoLocalDateTime) {
444 return compareTo((ChronoLocalDateTime<?>) obj) == 0;
445 }
446 return false;
447 }
448
449 @Override
450 public int hashCode() {
451 return toLocalDate().hashCode() ^ toLocalTime().hashCode();
452 }
453
454 @Override
455 public String toString() {
456 return toLocalDate().toString() + 'T' + toLocalTime().toString();
457 }
458
459 }