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; 63 64 import static java.time.temporal.ChronoField.EPOCH_DAY; 65 import static java.time.temporal.ChronoField.INSTANT_SECONDS; 66 import static java.time.temporal.ChronoField.NANO_OF_DAY; 67 import static java.time.temporal.ChronoField.OFFSET_SECONDS; 68 import static java.time.temporal.ChronoUnit.FOREVER; 69 import static java.time.temporal.ChronoUnit.NANOS; 70 71 import java.io.IOException; 72 import java.io.ObjectInput; 73 import java.io.ObjectOutput; 74 import java.io.InvalidObjectException; 75 import java.io.ObjectInputStream; 76 import java.io.Serializable; 77 import java.time.chrono.IsoChronology; 78 import java.time.format.DateTimeFormatter; 79 import java.time.format.DateTimeParseException; 80 import java.time.temporal.ChronoField; 81 import java.time.temporal.ChronoUnit; 82 import java.time.temporal.Temporal; 83 import java.time.temporal.TemporalAccessor; 84 import java.time.temporal.TemporalAdjuster; 85 import java.time.temporal.TemporalAmount; 86 import java.time.temporal.TemporalField; 87 import java.time.temporal.TemporalQueries; 88 import java.time.temporal.TemporalQuery; 89 import java.time.temporal.TemporalUnit; 90 import java.time.temporal.UnsupportedTemporalTypeException; 91 import java.time.temporal.ValueRange; 92 import java.time.zone.ZoneRules; 93 import java.util.Comparator; 94 import java.util.Objects; 95 96 /** 97 * A date-time with an offset from UTC/Greenwich in the ISO-8601 calendar system, 98 * such as {@code 2007-12-03T10:15:30+01:00}. 99 * <p> 100 * {@code OffsetDateTime} is an immutable representation of a date-time with an offset. 101 * This class stores all date and time fields, to a precision of nanoseconds, 102 * as well as the offset from UTC/Greenwich. For example, the value 103 * "2nd October 2007 at 13:45:30.123456789 +02:00" can be stored in an {@code OffsetDateTime}. 104 * <p> 105 * {@code OffsetDateTime}, {@link java.time.ZonedDateTime} and {@link java.time.Instant} all store an instant 106 * on the time-line to nanosecond precision. 107 * {@code Instant} is the simplest, simply representing the instant. 108 * {@code OffsetDateTime} adds to the instant the offset from UTC/Greenwich, which allows 109 * the local date-time to be obtained. 110 * {@code ZonedDateTime} adds full time-zone rules. 111 * <p> 112 * It is intended that {@code ZonedDateTime} or {@code Instant} is used to model data 113 * in simpler applications. This class may be used when modeling date-time concepts in 114 * more detail, or when communicating to a database or in a network protocol. 115 * 116 * <p> 117 * This is a <a href="{@docRoot}/java.base/java/lang/doc-files/ValueBased.html">value-based</a> 118 * class; use of identity-sensitive operations (including reference equality 119 * ({@code ==}), identity hash code, or synchronization) on instances of 120 * {@code OffsetDateTime} may have unpredictable results and should be avoided. 121 * The {@code equals} method should be used for comparisons. 122 * 123 * @implSpec 124 * This class is immutable and thread-safe. 125 * 126 * @since 1.8 127 */ 128 public final class OffsetDateTime 129 implements Temporal, TemporalAdjuster, Comparable<OffsetDateTime>, Serializable { 130 131 /** 132 * The minimum supported {@code OffsetDateTime}, '-999999999-01-01T00:00:00+18:00'. 133 * This is the local date-time of midnight at the start of the minimum date 134 * in the maximum offset (larger offsets are earlier on the time-line). 135 * This combines {@link LocalDateTime#MIN} and {@link ZoneOffset#MAX}. 136 * This could be used by an application as a "far past" date-time. 137 */ 138 public static final OffsetDateTime MIN = LocalDateTime.MIN.atOffset(ZoneOffset.MAX); 139 /** 140 * The maximum supported {@code OffsetDateTime}, '+999999999-12-31T23:59:59.999999999-18:00'. 141 * This is the local date-time just before midnight at the end of the maximum date 142 * in the minimum offset (larger negative offsets are later on the time-line). 143 * This combines {@link LocalDateTime#MAX} and {@link ZoneOffset#MIN}. 144 * This could be used by an application as a "far future" date-time. 145 */ 146 public static final OffsetDateTime MAX = LocalDateTime.MAX.atOffset(ZoneOffset.MIN); 147 148 /** 149 * Gets a comparator that compares two {@code OffsetDateTime} instances 150 * based solely on the instant. 151 * <p> 152 * This method differs from the comparison in {@link #compareTo} in that it 153 * only compares the underlying instant. 154 * 155 * @return a comparator that compares in time-line order 156 * 157 * @see #isAfter 158 * @see #isBefore 159 * @see #isEqual 160 */ 161 public static Comparator<OffsetDateTime> timeLineOrder() { 162 return OffsetDateTime::compareInstant; 163 } 164 165 /** 166 * Compares this {@code OffsetDateTime} to another date-time. 167 * The comparison is based on the instant. 168 * 169 * @param datetime1 the first date-time to compare, not null 170 * @param datetime2 the other date-time to compare to, not null 171 * @return the comparator value, negative if less, positive if greater 172 */ 173 private static int compareInstant(OffsetDateTime datetime1, OffsetDateTime datetime2) { 174 if (datetime1.getOffset().equals(datetime2.getOffset())) { 175 return datetime1.toLocalDateTime().compareTo(datetime2.toLocalDateTime()); 176 } 177 int cmp = Long.compare(datetime1.toEpochSecond(), datetime2.toEpochSecond()); 178 if (cmp == 0) { 179 cmp = datetime1.toLocalTime().getNano() - datetime2.toLocalTime().getNano(); 180 } 181 return cmp; 182 } 183 184 /** 185 * Serialization version. 186 */ 187 private static final long serialVersionUID = 2287754244819255394L; 188 189 /** 190 * The local date-time. 191 */ 192 private final LocalDateTime dateTime; 193 /** 194 * The offset from UTC/Greenwich. 195 */ 196 private final ZoneOffset offset; 197 198 //----------------------------------------------------------------------- 199 /** 200 * Obtains the current date-time from the system clock in the default time-zone. 201 * <p> 202 * This will query the {@link Clock#systemDefaultZone() system clock} in the default 203 * time-zone to obtain the current date-time. 204 * The offset will be calculated from the time-zone in the clock. 205 * <p> 206 * Using this method will prevent the ability to use an alternate clock for testing 207 * because the clock is hard-coded. 208 * 209 * @return the current date-time using the system clock, not null 210 */ 211 public static OffsetDateTime now() { 212 return now(Clock.systemDefaultZone()); 213 } 214 215 /** 216 * Obtains the current date-time from the system clock in the specified time-zone. 217 * <p> 218 * This will query the {@link Clock#system(ZoneId) system clock} to obtain the current date-time. 219 * Specifying the time-zone avoids dependence on the default time-zone. 220 * The offset will be calculated from the specified time-zone. 221 * <p> 222 * Using this method will prevent the ability to use an alternate clock for testing 223 * because the clock is hard-coded. 224 * 225 * @param zone the zone ID to use, not null 226 * @return the current date-time using the system clock, not null 227 */ 228 public static OffsetDateTime now(ZoneId zone) { 229 return now(Clock.system(zone)); 230 } 231 232 /** 233 * Obtains the current date-time from the specified clock. 234 * <p> 235 * This will query the specified clock to obtain the current date-time. 236 * The offset will be calculated from the time-zone in the clock. 237 * <p> 238 * Using this method allows the use of an alternate clock for testing. 239 * The alternate clock may be introduced using {@link Clock dependency injection}. 240 * 241 * @param clock the clock to use, not null 242 * @return the current date-time, not null 243 */ 244 public static OffsetDateTime now(Clock clock) { 245 Objects.requireNonNull(clock, "clock"); 246 final Instant now = clock.instant(); // called once 247 return ofInstant(now, clock.getZone().getRules().getOffset(now)); 248 } 249 250 //----------------------------------------------------------------------- 251 /** 252 * Obtains an instance of {@code OffsetDateTime} from a date, time and offset. 253 * <p> 254 * This creates an offset date-time with the specified local date, time and offset. 255 * 256 * @param date the local date, not null 257 * @param time the local time, not null 258 * @param offset the zone offset, not null 259 * @return the offset date-time, not null 260 */ 261 public static OffsetDateTime of(LocalDate date, LocalTime time, ZoneOffset offset) { 262 LocalDateTime dt = LocalDateTime.of(date, time); 263 return new OffsetDateTime(dt, offset); 264 } 265 266 /** 267 * Obtains an instance of {@code OffsetDateTime} from a date-time and offset. 268 * <p> 269 * This creates an offset date-time with the specified local date-time and offset. 270 * 271 * @param dateTime the local date-time, not null 272 * @param offset the zone offset, not null 273 * @return the offset date-time, not null 274 */ 275 public static OffsetDateTime of(LocalDateTime dateTime, ZoneOffset offset) { 276 return new OffsetDateTime(dateTime, offset); 277 } 278 279 /** 280 * Obtains an instance of {@code OffsetDateTime} from a year, month, day, 281 * hour, minute, second, nanosecond and offset. 282 * <p> 283 * This creates an offset date-time with the seven specified fields. 284 * <p> 285 * This method exists primarily for writing test cases. 286 * Non test-code will typically use other methods to create an offset time. 287 * {@code LocalDateTime} has five additional convenience variants of the 288 * equivalent factory method taking fewer arguments. 289 * They are not provided here to reduce the footprint of the API. 290 * 291 * @param year the year to represent, from MIN_YEAR to MAX_YEAR 292 * @param month the month-of-year to represent, from 1 (January) to 12 (December) 293 * @param dayOfMonth the day-of-month to represent, from 1 to 31 294 * @param hour the hour-of-day to represent, from 0 to 23 295 * @param minute the minute-of-hour to represent, from 0 to 59 296 * @param second the second-of-minute to represent, from 0 to 59 297 * @param nanoOfSecond the nano-of-second to represent, from 0 to 999,999,999 298 * @param offset the zone offset, not null 299 * @return the offset date-time, not null 300 * @throws DateTimeException if the value of any field is out of range, or 301 * if the day-of-month is invalid for the month-year 302 */ 303 public static OffsetDateTime of( 304 int year, int month, int dayOfMonth, 305 int hour, int minute, int second, int nanoOfSecond, ZoneOffset offset) { 306 LocalDateTime dt = LocalDateTime.of(year, month, dayOfMonth, hour, minute, second, nanoOfSecond); 307 return new OffsetDateTime(dt, offset); 308 } 309 310 //----------------------------------------------------------------------- 311 /** 312 * Obtains an instance of {@code OffsetDateTime} from an {@code Instant} and zone ID. 313 * <p> 314 * This creates an offset date-time with the same instant as that specified. 315 * Finding the offset from UTC/Greenwich is simple as there is only one valid 316 * offset for each instant. 317 * 318 * @param instant the instant to create the date-time from, not null 319 * @param zone the time-zone, which may be an offset, not null 320 * @return the offset date-time, not null 321 * @throws DateTimeException if the result exceeds the supported range 322 */ 323 public static OffsetDateTime ofInstant(Instant instant, ZoneId zone) { 324 Objects.requireNonNull(instant, "instant"); 325 Objects.requireNonNull(zone, "zone"); 326 ZoneRules rules = zone.getRules(); 327 ZoneOffset offset = rules.getOffset(instant); 328 LocalDateTime ldt = LocalDateTime.ofEpochSecond(instant.getEpochSecond(), instant.getNano(), offset); 329 return new OffsetDateTime(ldt, offset); 330 } 331 332 //----------------------------------------------------------------------- 333 /** 334 * Obtains an instance of {@code OffsetDateTime} from a temporal object. 335 * <p> 336 * This obtains an offset date-time based on the specified temporal. 337 * A {@code TemporalAccessor} represents an arbitrary set of date and time information, 338 * which this factory converts to an instance of {@code OffsetDateTime}. 339 * <p> 340 * The conversion will first obtain a {@code ZoneOffset} from the temporal object. 341 * It will then try to obtain a {@code LocalDateTime}, falling back to an {@code Instant} if necessary. 342 * The result will be the combination of {@code ZoneOffset} with either 343 * with {@code LocalDateTime} or {@code Instant}. 344 * Implementations are permitted to perform optimizations such as accessing 345 * those fields that are equivalent to the relevant objects. 346 * <p> 347 * This method matches the signature of the functional interface {@link TemporalQuery} 348 * allowing it to be used as a query via method reference, {@code OffsetDateTime::from}. 349 * 350 * @param temporal the temporal object to convert, not null 351 * @return the offset date-time, not null 352 * @throws DateTimeException if unable to convert to an {@code OffsetDateTime} 353 */ 354 public static OffsetDateTime from(TemporalAccessor temporal) { 355 if (temporal instanceof OffsetDateTime) { 356 return (OffsetDateTime) temporal; 357 } 358 try { 359 ZoneOffset offset = ZoneOffset.from(temporal); 360 LocalDate date = temporal.query(TemporalQueries.localDate()); 361 LocalTime time = temporal.query(TemporalQueries.localTime()); 362 if (date != null && time != null) { 363 return OffsetDateTime.of(date, time, offset); 364 } else { 365 Instant instant = Instant.from(temporal); 366 return OffsetDateTime.ofInstant(instant, offset); 367 } 368 } catch (DateTimeException ex) { 369 throw new DateTimeException("Unable to obtain OffsetDateTime from TemporalAccessor: " + 370 temporal + " of type " + temporal.getClass().getName(), ex); 371 } 372 } 373 374 //----------------------------------------------------------------------- 375 /** 376 * Obtains an instance of {@code OffsetDateTime} from a text string 377 * such as {@code 2007-12-03T10:15:30+01:00}. 378 * <p> 379 * The string must represent a valid date-time and is parsed using 380 * {@link java.time.format.DateTimeFormatter#ISO_OFFSET_DATE_TIME}. 381 * 382 * @param text the text to parse such as "2007-12-03T10:15:30+01:00", not null 383 * @return the parsed offset date-time, not null 384 * @throws DateTimeParseException if the text cannot be parsed 385 */ 386 public static OffsetDateTime parse(CharSequence text) { 387 return parse(text, DateTimeFormatter.ISO_OFFSET_DATE_TIME); 388 } 389 390 /** 391 * Obtains an instance of {@code OffsetDateTime} from a text string using a specific formatter. 392 * <p> 393 * The text is parsed using the formatter, returning a date-time. 394 * 395 * @param text the text to parse, not null 396 * @param formatter the formatter to use, not null 397 * @return the parsed offset date-time, not null 398 * @throws DateTimeParseException if the text cannot be parsed 399 */ 400 public static OffsetDateTime parse(CharSequence text, DateTimeFormatter formatter) { 401 Objects.requireNonNull(formatter, "formatter"); 402 return formatter.parse(text, OffsetDateTime::from); 403 } 404 405 //----------------------------------------------------------------------- 406 /** 407 * Constructor. 408 * 409 * @param dateTime the local date-time, not null 410 * @param offset the zone offset, not null 411 */ 412 private OffsetDateTime(LocalDateTime dateTime, ZoneOffset offset) { 413 this.dateTime = Objects.requireNonNull(dateTime, "dateTime"); 414 this.offset = Objects.requireNonNull(offset, "offset"); 415 } 416 417 /** 418 * Returns a new date-time based on this one, returning {@code this} where possible. 419 * 420 * @param dateTime the date-time to create with, not null 421 * @param offset the zone offset to create with, not null 422 */ 423 private OffsetDateTime with(LocalDateTime dateTime, ZoneOffset offset) { 424 if (this.dateTime == dateTime && this.offset.equals(offset)) { 425 return this; 426 } 427 return new OffsetDateTime(dateTime, offset); 428 } 429 430 //----------------------------------------------------------------------- 431 /** 432 * Checks if the specified field is supported. 433 * <p> 434 * This checks if this date-time can be queried for the specified field. 435 * If false, then calling the {@link #range(TemporalField) range}, 436 * {@link #get(TemporalField) get} and {@link #with(TemporalField, long)} 437 * methods will throw an exception. 438 * <p> 439 * If the field is a {@link ChronoField} then the query is implemented here. 440 * The supported fields are: 441 * <ul> 442 * <li>{@code NANO_OF_SECOND} 443 * <li>{@code NANO_OF_DAY} 444 * <li>{@code MICRO_OF_SECOND} 445 * <li>{@code MICRO_OF_DAY} 446 * <li>{@code MILLI_OF_SECOND} 447 * <li>{@code MILLI_OF_DAY} 448 * <li>{@code SECOND_OF_MINUTE} 449 * <li>{@code SECOND_OF_DAY} 450 * <li>{@code MINUTE_OF_HOUR} 451 * <li>{@code MINUTE_OF_DAY} 452 * <li>{@code HOUR_OF_AMPM} 453 * <li>{@code CLOCK_HOUR_OF_AMPM} 454 * <li>{@code HOUR_OF_DAY} 455 * <li>{@code CLOCK_HOUR_OF_DAY} 456 * <li>{@code AMPM_OF_DAY} 457 * <li>{@code DAY_OF_WEEK} 458 * <li>{@code ALIGNED_DAY_OF_WEEK_IN_MONTH} 459 * <li>{@code ALIGNED_DAY_OF_WEEK_IN_YEAR} 460 * <li>{@code DAY_OF_MONTH} 461 * <li>{@code DAY_OF_YEAR} 462 * <li>{@code EPOCH_DAY} 463 * <li>{@code ALIGNED_WEEK_OF_MONTH} 464 * <li>{@code ALIGNED_WEEK_OF_YEAR} 465 * <li>{@code MONTH_OF_YEAR} 466 * <li>{@code PROLEPTIC_MONTH} 467 * <li>{@code YEAR_OF_ERA} 468 * <li>{@code YEAR} 469 * <li>{@code ERA} 470 * <li>{@code INSTANT_SECONDS} 471 * <li>{@code OFFSET_SECONDS} 472 * </ul> 473 * All other {@code ChronoField} instances will return false. 474 * <p> 475 * If the field is not a {@code ChronoField}, then the result of this method 476 * is obtained by invoking {@code TemporalField.isSupportedBy(TemporalAccessor)} 477 * passing {@code this} as the argument. 478 * Whether the field is supported is determined by the field. 479 * 480 * @param field the field to check, null returns false 481 * @return true if the field is supported on this date-time, false if not 482 */ 483 @Override 484 public boolean isSupported(TemporalField field) { 485 return field instanceof ChronoField || (field != null && field.isSupportedBy(this)); 486 } 487 488 /** 489 * Checks if the specified unit is supported. 490 * <p> 491 * This checks if the specified unit can be added to, or subtracted from, this date-time. 492 * If false, then calling the {@link #plus(long, TemporalUnit)} and 493 * {@link #minus(long, TemporalUnit) minus} methods will throw an exception. 494 * <p> 495 * If the unit is a {@link ChronoUnit} then the query is implemented here. 496 * The supported units are: 497 * <ul> 498 * <li>{@code NANOS} 499 * <li>{@code MICROS} 500 * <li>{@code MILLIS} 501 * <li>{@code SECONDS} 502 * <li>{@code MINUTES} 503 * <li>{@code HOURS} 504 * <li>{@code HALF_DAYS} 505 * <li>{@code DAYS} 506 * <li>{@code WEEKS} 507 * <li>{@code MONTHS} 508 * <li>{@code YEARS} 509 * <li>{@code DECADES} 510 * <li>{@code CENTURIES} 511 * <li>{@code MILLENNIA} 512 * <li>{@code ERAS} 513 * </ul> 514 * All other {@code ChronoUnit} instances will return false. 515 * <p> 516 * If the unit is not a {@code ChronoUnit}, then the result of this method 517 * is obtained by invoking {@code TemporalUnit.isSupportedBy(Temporal)} 518 * passing {@code this} as the argument. 519 * Whether the unit is supported is determined by the unit. 520 * 521 * @param unit the unit to check, null returns false 522 * @return true if the unit can be added/subtracted, false if not 523 */ 524 @Override // override for Javadoc 525 public boolean isSupported(TemporalUnit unit) { 526 if (unit instanceof ChronoUnit) { 527 return unit != FOREVER; 528 } 529 return unit != null && unit.isSupportedBy(this); 530 } 531 532 //----------------------------------------------------------------------- 533 /** 534 * Gets the range of valid values for the specified field. 535 * <p> 536 * The range object expresses the minimum and maximum valid values for a field. 537 * This date-time is used to enhance the accuracy of the returned range. 538 * If it is not possible to return the range, because the field is not supported 539 * or for some other reason, an exception is thrown. 540 * <p> 541 * If the field is a {@link ChronoField} then the query is implemented here. 542 * The {@link #isSupported(TemporalField) supported fields} will return 543 * appropriate range instances. 544 * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}. 545 * <p> 546 * If the field is not a {@code ChronoField}, then the result of this method 547 * is obtained by invoking {@code TemporalField.rangeRefinedBy(TemporalAccessor)} 548 * passing {@code this} as the argument. 549 * Whether the range can be obtained is determined by the field. 550 * 551 * @param field the field to query the range for, not null 552 * @return the range of valid values for the field, not null 553 * @throws DateTimeException if the range for the field cannot be obtained 554 * @throws UnsupportedTemporalTypeException if the field is not supported 555 */ 556 @Override 557 public ValueRange range(TemporalField field) { 558 if (field instanceof ChronoField) { 559 if (field == INSTANT_SECONDS || field == OFFSET_SECONDS) { 560 return field.range(); 561 } 562 return dateTime.range(field); 563 } 564 return field.rangeRefinedBy(this); 565 } 566 567 /** 568 * Gets the value of the specified field from this date-time as an {@code int}. 569 * <p> 570 * This queries this date-time for the value of the specified field. 571 * The returned value will always be within the valid range of values for the field. 572 * If it is not possible to return the value, because the field is not supported 573 * or for some other reason, an exception is thrown. 574 * <p> 575 * If the field is a {@link ChronoField} then the query is implemented here. 576 * The {@link #isSupported(TemporalField) supported fields} will return valid 577 * values based on this date-time, except {@code NANO_OF_DAY}, {@code MICRO_OF_DAY}, 578 * {@code EPOCH_DAY}, {@code PROLEPTIC_MONTH} and {@code INSTANT_SECONDS} which are too 579 * large to fit in an {@code int} and throw an {@code UnsupportedTemporalTypeException}. 580 * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}. 581 * <p> 582 * If the field is not a {@code ChronoField}, then the result of this method 583 * is obtained by invoking {@code TemporalField.getFrom(TemporalAccessor)} 584 * passing {@code this} as the argument. Whether the value can be obtained, 585 * and what the value represents, is determined by the field. 586 * 587 * @param field the field to get, not null 588 * @return the value for the field 589 * @throws DateTimeException if a value for the field cannot be obtained or 590 * the value is outside the range of valid values for the field 591 * @throws UnsupportedTemporalTypeException if the field is not supported or 592 * the range of values exceeds an {@code int} 593 * @throws ArithmeticException if numeric overflow occurs 594 */ 595 @Override 596 public int get(TemporalField field) { 597 if (field instanceof ChronoField) { 598 switch ((ChronoField) field) { 599 case INSTANT_SECONDS: 600 throw new UnsupportedTemporalTypeException("Invalid field 'InstantSeconds' for get() method, use getLong() instead"); 601 case OFFSET_SECONDS: 602 return getOffset().getTotalSeconds(); 603 } 604 return dateTime.get(field); 605 } 606 return Temporal.super.get(field); 607 } 608 609 /** 610 * Gets the value of the specified field from this date-time as a {@code long}. 611 * <p> 612 * This queries this date-time for the value of the specified field. 613 * If it is not possible to return the value, because the field is not supported 614 * or for some other reason, an exception is thrown. 615 * <p> 616 * If the field is a {@link ChronoField} then the query is implemented here. 617 * The {@link #isSupported(TemporalField) supported fields} will return valid 618 * values based on this date-time. 619 * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}. 620 * <p> 621 * If the field is not a {@code ChronoField}, then the result of this method 622 * is obtained by invoking {@code TemporalField.getFrom(TemporalAccessor)} 623 * passing {@code this} as the argument. Whether the value can be obtained, 624 * and what the value represents, is determined by the field. 625 * 626 * @param field the field to get, not null 627 * @return the value for the field 628 * @throws DateTimeException if a value for the field cannot be obtained 629 * @throws UnsupportedTemporalTypeException if the field is not supported 630 * @throws ArithmeticException if numeric overflow occurs 631 */ 632 @Override 633 public long getLong(TemporalField field) { 634 if (field instanceof ChronoField) { 635 switch ((ChronoField) field) { 636 case INSTANT_SECONDS: return toEpochSecond(); 637 case OFFSET_SECONDS: return getOffset().getTotalSeconds(); 638 } 639 return dateTime.getLong(field); 640 } 641 return field.getFrom(this); 642 } 643 644 //----------------------------------------------------------------------- 645 /** 646 * Gets the zone offset, such as '+01:00'. 647 * <p> 648 * This is the offset of the local date-time from UTC/Greenwich. 649 * 650 * @return the zone offset, not null 651 */ 652 public ZoneOffset getOffset() { 653 return offset; 654 } 655 656 /** 657 * Returns a copy of this {@code OffsetDateTime} with the specified offset ensuring 658 * that the result has the same local date-time. 659 * <p> 660 * This method returns an object with the same {@code LocalDateTime} and the specified {@code ZoneOffset}. 661 * No calculation is needed or performed. 662 * For example, if this time represents {@code 2007-12-03T10:30+02:00} and the offset specified is 663 * {@code +03:00}, then this method will return {@code 2007-12-03T10:30+03:00}. 664 * <p> 665 * To take into account the difference between the offsets, and adjust the time fields, 666 * use {@link #withOffsetSameInstant}. 667 * <p> 668 * This instance is immutable and unaffected by this method call. 669 * 670 * @param offset the zone offset to change to, not null 671 * @return an {@code OffsetDateTime} based on this date-time with the requested offset, not null 672 */ 673 public OffsetDateTime withOffsetSameLocal(ZoneOffset offset) { 674 return with(dateTime, offset); 675 } 676 677 /** 678 * Returns a copy of this {@code OffsetDateTime} with the specified offset ensuring 679 * that the result is at the same instant. 680 * <p> 681 * This method returns an object with the specified {@code ZoneOffset} and a {@code LocalDateTime} 682 * adjusted by the difference between the two offsets. 683 * This will result in the old and new objects representing the same instant. 684 * This is useful for finding the local time in a different offset. 685 * For example, if this time represents {@code 2007-12-03T10:30+02:00} and the offset specified is 686 * {@code +03:00}, then this method will return {@code 2007-12-03T11:30+03:00}. 687 * <p> 688 * To change the offset without adjusting the local time use {@link #withOffsetSameLocal}. 689 * <p> 690 * This instance is immutable and unaffected by this method call. 691 * 692 * @param offset the zone offset to change to, not null 693 * @return an {@code OffsetDateTime} based on this date-time with the requested offset, not null 694 * @throws DateTimeException if the result exceeds the supported date range 695 */ 696 public OffsetDateTime withOffsetSameInstant(ZoneOffset offset) { 697 if (offset.equals(this.offset)) { 698 return this; 699 } 700 int difference = offset.getTotalSeconds() - this.offset.getTotalSeconds(); 701 LocalDateTime adjusted = dateTime.plusSeconds(difference); 702 return new OffsetDateTime(adjusted, offset); 703 } 704 705 //----------------------------------------------------------------------- 706 /** 707 * Gets the {@code LocalDateTime} part of this date-time. 708 * <p> 709 * This returns a {@code LocalDateTime} with the same year, month, day and time 710 * as this date-time. 711 * 712 * @return the local date-time part of this date-time, not null 713 */ 714 public LocalDateTime toLocalDateTime() { 715 return dateTime; 716 } 717 718 //----------------------------------------------------------------------- 719 /** 720 * Gets the {@code LocalDate} part of this date-time. 721 * <p> 722 * This returns a {@code LocalDate} with the same year, month and day 723 * as this date-time. 724 * 725 * @return the date part of this date-time, not null 726 */ 727 public LocalDate toLocalDate() { 728 return dateTime.toLocalDate(); 729 } 730 731 /** 732 * Gets the year field. 733 * <p> 734 * This method returns the primitive {@code int} value for the year. 735 * <p> 736 * The year returned by this method is proleptic as per {@code get(YEAR)}. 737 * To obtain the year-of-era, use {@code get(YEAR_OF_ERA)}. 738 * 739 * @return the year, from MIN_YEAR to MAX_YEAR 740 */ 741 public int getYear() { 742 return dateTime.getYear(); 743 } 744 745 /** 746 * Gets the month-of-year field from 1 to 12. 747 * <p> 748 * This method returns the month as an {@code int} from 1 to 12. 749 * Application code is frequently clearer if the enum {@link Month} 750 * is used by calling {@link #getMonth()}. 751 * 752 * @return the month-of-year, from 1 to 12 753 * @see #getMonth() 754 */ 755 public int getMonthValue() { 756 return dateTime.getMonthValue(); 757 } 758 759 /** 760 * Gets the month-of-year field using the {@code Month} enum. 761 * <p> 762 * This method returns the enum {@link Month} for the month. 763 * This avoids confusion as to what {@code int} values mean. 764 * If you need access to the primitive {@code int} value then the enum 765 * provides the {@link Month#getValue() int value}. 766 * 767 * @return the month-of-year, not null 768 * @see #getMonthValue() 769 */ 770 public Month getMonth() { 771 return dateTime.getMonth(); 772 } 773 774 /** 775 * Gets the day-of-month field. 776 * <p> 777 * This method returns the primitive {@code int} value for the day-of-month. 778 * 779 * @return the day-of-month, from 1 to 31 780 */ 781 public int getDayOfMonth() { 782 return dateTime.getDayOfMonth(); 783 } 784 785 /** 786 * Gets the day-of-year field. 787 * <p> 788 * This method returns the primitive {@code int} value for the day-of-year. 789 * 790 * @return the day-of-year, from 1 to 365, or 366 in a leap year 791 */ 792 public int getDayOfYear() { 793 return dateTime.getDayOfYear(); 794 } 795 796 /** 797 * Gets the day-of-week field, which is an enum {@code DayOfWeek}. 798 * <p> 799 * This method returns the enum {@link DayOfWeek} for the day-of-week. 800 * This avoids confusion as to what {@code int} values mean. 801 * If you need access to the primitive {@code int} value then the enum 802 * provides the {@link DayOfWeek#getValue() int value}. 803 * <p> 804 * Additional information can be obtained from the {@code DayOfWeek}. 805 * This includes textual names of the values. 806 * 807 * @return the day-of-week, not null 808 */ 809 public DayOfWeek getDayOfWeek() { 810 return dateTime.getDayOfWeek(); 811 } 812 813 //----------------------------------------------------------------------- 814 /** 815 * Gets the {@code LocalTime} part of this date-time. 816 * <p> 817 * This returns a {@code LocalTime} with the same hour, minute, second and 818 * nanosecond as this date-time. 819 * 820 * @return the time part of this date-time, not null 821 */ 822 public LocalTime toLocalTime() { 823 return dateTime.toLocalTime(); 824 } 825 826 /** 827 * Gets the hour-of-day field. 828 * 829 * @return the hour-of-day, from 0 to 23 830 */ 831 public int getHour() { 832 return dateTime.getHour(); 833 } 834 835 /** 836 * Gets the minute-of-hour field. 837 * 838 * @return the minute-of-hour, from 0 to 59 839 */ 840 public int getMinute() { 841 return dateTime.getMinute(); 842 } 843 844 /** 845 * Gets the second-of-minute field. 846 * 847 * @return the second-of-minute, from 0 to 59 848 */ 849 public int getSecond() { 850 return dateTime.getSecond(); 851 } 852 853 /** 854 * Gets the nano-of-second field. 855 * 856 * @return the nano-of-second, from 0 to 999,999,999 857 */ 858 public int getNano() { 859 return dateTime.getNano(); 860 } 861 862 //----------------------------------------------------------------------- 863 /** 864 * Returns an adjusted copy of this date-time. 865 * <p> 866 * This returns an {@code OffsetDateTime}, based on this one, with the date-time adjusted. 867 * The adjustment takes place using the specified adjuster strategy object. 868 * Read the documentation of the adjuster to understand what adjustment will be made. 869 * <p> 870 * A simple adjuster might simply set the one of the fields, such as the year field. 871 * A more complex adjuster might set the date to the last day of the month. 872 * A selection of common adjustments is provided in 873 * {@link java.time.temporal.TemporalAdjusters TemporalAdjusters}. 874 * These include finding the "last day of the month" and "next Wednesday". 875 * Key date-time classes also implement the {@code TemporalAdjuster} interface, 876 * such as {@link Month} and {@link java.time.MonthDay MonthDay}. 877 * The adjuster is responsible for handling special cases, such as the varying 878 * lengths of month and leap years. 879 * <p> 880 * For example this code returns a date on the last day of July: 881 * <pre> 882 * import static java.time.Month.*; 883 * import static java.time.temporal.TemporalAdjusters.*; 884 * 885 * result = offsetDateTime.with(JULY).with(lastDayOfMonth()); 886 * </pre> 887 * <p> 888 * The classes {@link LocalDate}, {@link LocalTime} and {@link ZoneOffset} implement 889 * {@code TemporalAdjuster}, thus this method can be used to change the date, time or offset: 890 * <pre> 891 * result = offsetDateTime.with(date); 892 * result = offsetDateTime.with(time); 893 * result = offsetDateTime.with(offset); 894 * </pre> 895 * <p> 896 * The result of this method is obtained by invoking the 897 * {@link TemporalAdjuster#adjustInto(Temporal)} method on the 898 * specified adjuster passing {@code this} as the argument. 899 * <p> 900 * This instance is immutable and unaffected by this method call. 901 * 902 * @param adjuster the adjuster to use, not null 903 * @return an {@code OffsetDateTime} based on {@code this} with the adjustment made, not null 904 * @throws DateTimeException if the adjustment cannot be made 905 * @throws ArithmeticException if numeric overflow occurs 906 */ 907 @Override 908 public OffsetDateTime with(TemporalAdjuster adjuster) { 909 // optimizations 910 if (adjuster instanceof LocalDate || adjuster instanceof LocalTime || adjuster instanceof LocalDateTime) { 911 return with(dateTime.with(adjuster), offset); 912 } else if (adjuster instanceof Instant) { 913 return ofInstant((Instant) adjuster, offset); 914 } else if (adjuster instanceof ZoneOffset) { 915 return with(dateTime, (ZoneOffset) adjuster); 916 } else if (adjuster instanceof OffsetDateTime) { 917 return (OffsetDateTime) adjuster; 918 } 919 return (OffsetDateTime) adjuster.adjustInto(this); 920 } 921 922 /** 923 * Returns a copy of this date-time with the specified field set to a new value. 924 * <p> 925 * This returns an {@code OffsetDateTime}, based on this one, with the value 926 * for the specified field changed. 927 * This can be used to change any supported field, such as the year, month or day-of-month. 928 * If it is not possible to set the value, because the field is not supported or for 929 * some other reason, an exception is thrown. 930 * <p> 931 * In some cases, changing the specified field can cause the resulting date-time to become invalid, 932 * such as changing the month from 31st January to February would make the day-of-month invalid. 933 * In cases like this, the field is responsible for resolving the date. Typically it will choose 934 * the previous valid date, which would be the last valid day of February in this example. 935 * <p> 936 * If the field is a {@link ChronoField} then the adjustment is implemented here. 937 * <p> 938 * The {@code INSTANT_SECONDS} field will return a date-time with the specified instant. 939 * The offset and nano-of-second are unchanged. 940 * If the new instant value is outside the valid range then a {@code DateTimeException} will be thrown. 941 * <p> 942 * The {@code OFFSET_SECONDS} field will return a date-time with the specified offset. 943 * The local date-time is unaltered. If the new offset value is outside the valid range 944 * then a {@code DateTimeException} will be thrown. 945 * <p> 946 * The other {@link #isSupported(TemporalField) supported fields} will behave as per 947 * the matching method on {@link LocalDateTime#with(TemporalField, long) LocalDateTime}. 948 * In this case, the offset is not part of the calculation and will be unchanged. 949 * <p> 950 * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}. 951 * <p> 952 * If the field is not a {@code ChronoField}, then the result of this method 953 * is obtained by invoking {@code TemporalField.adjustInto(Temporal, long)} 954 * passing {@code this} as the argument. In this case, the field determines 955 * whether and how to adjust the instant. 956 * <p> 957 * This instance is immutable and unaffected by this method call. 958 * 959 * @param field the field to set in the result, not null 960 * @param newValue the new value of the field in the result 961 * @return an {@code OffsetDateTime} based on {@code this} with the specified field set, not null 962 * @throws DateTimeException if the field cannot be set 963 * @throws UnsupportedTemporalTypeException if the field is not supported 964 * @throws ArithmeticException if numeric overflow occurs 965 */ 966 @Override 967 public OffsetDateTime with(TemporalField field, long newValue) { 968 if (field instanceof ChronoField) { 969 ChronoField f = (ChronoField) field; 970 switch (f) { 971 case INSTANT_SECONDS: return ofInstant(Instant.ofEpochSecond(newValue, getNano()), offset); 972 case OFFSET_SECONDS: { 973 return with(dateTime, ZoneOffset.ofTotalSeconds(f.checkValidIntValue(newValue))); 974 } 975 } 976 return with(dateTime.with(field, newValue), offset); 977 } 978 return field.adjustInto(this, newValue); 979 } 980 981 //----------------------------------------------------------------------- 982 /** 983 * Returns a copy of this {@code OffsetDateTime} with the year altered. 984 * <p> 985 * The time and offset do not affect the calculation and will be the same in the result. 986 * If the day-of-month is invalid for the year, it will be changed to the last valid day of the month. 987 * <p> 988 * This instance is immutable and unaffected by this method call. 989 * 990 * @param year the year to set in the result, from MIN_YEAR to MAX_YEAR 991 * @return an {@code OffsetDateTime} based on this date-time with the requested year, not null 992 * @throws DateTimeException if the year value is invalid 993 */ 994 public OffsetDateTime withYear(int year) { 995 return with(dateTime.withYear(year), offset); 996 } 997 998 /** 999 * Returns a copy of this {@code OffsetDateTime} with the month-of-year altered. 1000 * <p> 1001 * The time and offset do not affect the calculation and will be the same in the result. 1002 * If the day-of-month is invalid for the year, it will be changed to the last valid day of the month. 1003 * <p> 1004 * This instance is immutable and unaffected by this method call. 1005 * 1006 * @param month the month-of-year to set in the result, from 1 (January) to 12 (December) 1007 * @return an {@code OffsetDateTime} based on this date-time with the requested month, not null 1008 * @throws DateTimeException if the month-of-year value is invalid 1009 */ 1010 public OffsetDateTime withMonth(int month) { 1011 return with(dateTime.withMonth(month), offset); 1012 } 1013 1014 /** 1015 * Returns a copy of this {@code OffsetDateTime} with the day-of-month altered. 1016 * <p> 1017 * If the resulting {@code OffsetDateTime} is invalid, an exception is thrown. 1018 * The time and offset do not affect the calculation and will be the same in the result. 1019 * <p> 1020 * This instance is immutable and unaffected by this method call. 1021 * 1022 * @param dayOfMonth the day-of-month to set in the result, from 1 to 28-31 1023 * @return an {@code OffsetDateTime} based on this date-time with the requested day, not null 1024 * @throws DateTimeException if the day-of-month value is invalid, 1025 * or if the day-of-month is invalid for the month-year 1026 */ 1027 public OffsetDateTime withDayOfMonth(int dayOfMonth) { 1028 return with(dateTime.withDayOfMonth(dayOfMonth), offset); 1029 } 1030 1031 /** 1032 * Returns a copy of this {@code OffsetDateTime} with the day-of-year altered. 1033 * <p> 1034 * The time and offset do not affect the calculation and will be the same in the result. 1035 * If the resulting {@code OffsetDateTime} is invalid, an exception is thrown. 1036 * <p> 1037 * This instance is immutable and unaffected by this method call. 1038 * 1039 * @param dayOfYear the day-of-year to set in the result, from 1 to 365-366 1040 * @return an {@code OffsetDateTime} based on this date with the requested day, not null 1041 * @throws DateTimeException if the day-of-year value is invalid, 1042 * or if the day-of-year is invalid for the year 1043 */ 1044 public OffsetDateTime withDayOfYear(int dayOfYear) { 1045 return with(dateTime.withDayOfYear(dayOfYear), offset); 1046 } 1047 1048 //----------------------------------------------------------------------- 1049 /** 1050 * Returns a copy of this {@code OffsetDateTime} with the hour-of-day altered. 1051 * <p> 1052 * The date and offset do not affect the calculation and will be the same in the result. 1053 * <p> 1054 * This instance is immutable and unaffected by this method call. 1055 * 1056 * @param hour the hour-of-day to set in the result, from 0 to 23 1057 * @return an {@code OffsetDateTime} based on this date-time with the requested hour, not null 1058 * @throws DateTimeException if the hour value is invalid 1059 */ 1060 public OffsetDateTime withHour(int hour) { 1061 return with(dateTime.withHour(hour), offset); 1062 } 1063 1064 /** 1065 * Returns a copy of this {@code OffsetDateTime} with the minute-of-hour altered. 1066 * <p> 1067 * The date and offset do not affect the calculation and will be the same in the result. 1068 * <p> 1069 * This instance is immutable and unaffected by this method call. 1070 * 1071 * @param minute the minute-of-hour to set in the result, from 0 to 59 1072 * @return an {@code OffsetDateTime} based on this date-time with the requested minute, not null 1073 * @throws DateTimeException if the minute value is invalid 1074 */ 1075 public OffsetDateTime withMinute(int minute) { 1076 return with(dateTime.withMinute(minute), offset); 1077 } 1078 1079 /** 1080 * Returns a copy of this {@code OffsetDateTime} with the second-of-minute altered. 1081 * <p> 1082 * The date and offset do not affect the calculation and will be the same in the result. 1083 * <p> 1084 * This instance is immutable and unaffected by this method call. 1085 * 1086 * @param second the second-of-minute to set in the result, from 0 to 59 1087 * @return an {@code OffsetDateTime} based on this date-time with the requested second, not null 1088 * @throws DateTimeException if the second value is invalid 1089 */ 1090 public OffsetDateTime withSecond(int second) { 1091 return with(dateTime.withSecond(second), offset); 1092 } 1093 1094 /** 1095 * Returns a copy of this {@code OffsetDateTime} with the nano-of-second altered. 1096 * <p> 1097 * The date and offset do not affect the calculation and will be the same in the result. 1098 * <p> 1099 * This instance is immutable and unaffected by this method call. 1100 * 1101 * @param nanoOfSecond the nano-of-second to set in the result, from 0 to 999,999,999 1102 * @return an {@code OffsetDateTime} based on this date-time with the requested nanosecond, not null 1103 * @throws DateTimeException if the nano value is invalid 1104 */ 1105 public OffsetDateTime withNano(int nanoOfSecond) { 1106 return with(dateTime.withNano(nanoOfSecond), offset); 1107 } 1108 1109 //----------------------------------------------------------------------- 1110 /** 1111 * Returns a copy of this {@code OffsetDateTime} with the time truncated. 1112 * <p> 1113 * Truncation returns a copy of the original date-time with fields 1114 * smaller than the specified unit set to zero. 1115 * For example, truncating with the {@link ChronoUnit#MINUTES minutes} unit 1116 * will set the second-of-minute and nano-of-second field to zero. 1117 * <p> 1118 * The unit must have a {@linkplain TemporalUnit#getDuration() duration} 1119 * that divides into the length of a standard day without remainder. 1120 * This includes all supplied time units on {@link ChronoUnit} and 1121 * {@link ChronoUnit#DAYS DAYS}. Other units throw an exception. 1122 * <p> 1123 * The offset does not affect the calculation and will be the same in the result. 1124 * <p> 1125 * This instance is immutable and unaffected by this method call. 1126 * 1127 * @param unit the unit to truncate to, not null 1128 * @return an {@code OffsetDateTime} based on this date-time with the time truncated, not null 1129 * @throws DateTimeException if unable to truncate 1130 * @throws UnsupportedTemporalTypeException if the unit is not supported 1131 */ 1132 public OffsetDateTime truncatedTo(TemporalUnit unit) { 1133 return with(dateTime.truncatedTo(unit), offset); 1134 } 1135 1136 //----------------------------------------------------------------------- 1137 /** 1138 * Returns a copy of this date-time with the specified amount added. 1139 * <p> 1140 * This returns an {@code OffsetDateTime}, based on this one, with the specified amount added. 1141 * The amount is typically {@link Period} or {@link Duration} but may be 1142 * any other type implementing the {@link TemporalAmount} interface. 1143 * <p> 1144 * The calculation is delegated to the amount object by calling 1145 * {@link TemporalAmount#addTo(Temporal)}. The amount implementation is free 1146 * to implement the addition in any way it wishes, however it typically 1147 * calls back to {@link #plus(long, TemporalUnit)}. Consult the documentation 1148 * of the amount implementation to determine if it can be successfully added. 1149 * <p> 1150 * This instance is immutable and unaffected by this method call. 1151 * 1152 * @param amountToAdd the amount to add, not null 1153 * @return an {@code OffsetDateTime} based on this date-time with the addition made, not null 1154 * @throws DateTimeException if the addition cannot be made 1155 * @throws ArithmeticException if numeric overflow occurs 1156 */ 1157 @Override 1158 public OffsetDateTime plus(TemporalAmount amountToAdd) { 1159 return (OffsetDateTime) amountToAdd.addTo(this); 1160 } 1161 1162 /** 1163 * Returns a copy of this date-time with the specified amount added. 1164 * <p> 1165 * This returns an {@code OffsetDateTime}, based on this one, with the amount 1166 * in terms of the unit added. If it is not possible to add the amount, because the 1167 * unit is not supported or for some other reason, an exception is thrown. 1168 * <p> 1169 * If the field is a {@link ChronoUnit} then the addition is implemented by 1170 * {@link LocalDateTime#plus(long, TemporalUnit)}. 1171 * The offset is not part of the calculation and will be unchanged in the result. 1172 * <p> 1173 * If the field is not a {@code ChronoUnit}, then the result of this method 1174 * is obtained by invoking {@code TemporalUnit.addTo(Temporal, long)} 1175 * passing {@code this} as the argument. In this case, the unit determines 1176 * whether and how to perform the addition. 1177 * <p> 1178 * This instance is immutable and unaffected by this method call. 1179 * 1180 * @param amountToAdd the amount of the unit to add to the result, may be negative 1181 * @param unit the unit of the amount to add, not null 1182 * @return an {@code OffsetDateTime} based on this date-time with the specified amount added, not null 1183 * @throws DateTimeException if the addition cannot be made 1184 * @throws UnsupportedTemporalTypeException if the unit is not supported 1185 * @throws ArithmeticException if numeric overflow occurs 1186 */ 1187 @Override 1188 public OffsetDateTime plus(long amountToAdd, TemporalUnit unit) { 1189 if (unit instanceof ChronoUnit) { 1190 return with(dateTime.plus(amountToAdd, unit), offset); 1191 } 1192 return unit.addTo(this, amountToAdd); 1193 } 1194 1195 //----------------------------------------------------------------------- 1196 /** 1197 * Returns a copy of this {@code OffsetDateTime} with the specified number of years added. 1198 * <p> 1199 * This method adds the specified amount to the years field in three steps: 1200 * <ol> 1201 * <li>Add the input years to the year field</li> 1202 * <li>Check if the resulting date would be invalid</li> 1203 * <li>Adjust the day-of-month to the last valid day if necessary</li> 1204 * </ol> 1205 * <p> 1206 * For example, 2008-02-29 (leap year) plus one year would result in the 1207 * invalid date 2009-02-29 (standard year). Instead of returning an invalid 1208 * result, the last valid day of the month, 2009-02-28, is selected instead. 1209 * <p> 1210 * This instance is immutable and unaffected by this method call. 1211 * 1212 * @param years the years to add, may be negative 1213 * @return an {@code OffsetDateTime} based on this date-time with the years added, not null 1214 * @throws DateTimeException if the result exceeds the supported date range 1215 */ 1216 public OffsetDateTime plusYears(long years) { 1217 return with(dateTime.plusYears(years), offset); 1218 } 1219 1220 /** 1221 * Returns a copy of this {@code OffsetDateTime} with the specified number of months added. 1222 * <p> 1223 * This method adds the specified amount to the months field in three steps: 1224 * <ol> 1225 * <li>Add the input months to the month-of-year field</li> 1226 * <li>Check if the resulting date would be invalid</li> 1227 * <li>Adjust the day-of-month to the last valid day if necessary</li> 1228 * </ol> 1229 * <p> 1230 * For example, 2007-03-31 plus one month would result in the invalid date 1231 * 2007-04-31. Instead of returning an invalid result, the last valid day 1232 * of the month, 2007-04-30, is selected instead. 1233 * <p> 1234 * This instance is immutable and unaffected by this method call. 1235 * 1236 * @param months the months to add, may be negative 1237 * @return an {@code OffsetDateTime} based on this date-time with the months added, not null 1238 * @throws DateTimeException if the result exceeds the supported date range 1239 */ 1240 public OffsetDateTime plusMonths(long months) { 1241 return with(dateTime.plusMonths(months), offset); 1242 } 1243 1244 /** 1245 * Returns a copy of this OffsetDateTime with the specified number of weeks added. 1246 * <p> 1247 * This method adds the specified amount in weeks to the days field incrementing 1248 * the month and year fields as necessary to ensure the result remains valid. 1249 * The result is only invalid if the maximum/minimum year is exceeded. 1250 * <p> 1251 * For example, 2008-12-31 plus one week would result in 2009-01-07. 1252 * <p> 1253 * This instance is immutable and unaffected by this method call. 1254 * 1255 * @param weeks the weeks to add, may be negative 1256 * @return an {@code OffsetDateTime} based on this date-time with the weeks added, not null 1257 * @throws DateTimeException if the result exceeds the supported date range 1258 */ 1259 public OffsetDateTime plusWeeks(long weeks) { 1260 return with(dateTime.plusWeeks(weeks), offset); 1261 } 1262 1263 /** 1264 * Returns a copy of this OffsetDateTime with the specified number of days added. 1265 * <p> 1266 * This method adds the specified amount to the days field incrementing the 1267 * month and year fields as necessary to ensure the result remains valid. 1268 * The result is only invalid if the maximum/minimum year is exceeded. 1269 * <p> 1270 * For example, 2008-12-31 plus one day would result in 2009-01-01. 1271 * <p> 1272 * This instance is immutable and unaffected by this method call. 1273 * 1274 * @param days the days to add, may be negative 1275 * @return an {@code OffsetDateTime} based on this date-time with the days added, not null 1276 * @throws DateTimeException if the result exceeds the supported date range 1277 */ 1278 public OffsetDateTime plusDays(long days) { 1279 return with(dateTime.plusDays(days), offset); 1280 } 1281 1282 /** 1283 * Returns a copy of this {@code OffsetDateTime} with the specified number of hours added. 1284 * <p> 1285 * This instance is immutable and unaffected by this method call. 1286 * 1287 * @param hours the hours to add, may be negative 1288 * @return an {@code OffsetDateTime} based on this date-time with the hours added, not null 1289 * @throws DateTimeException if the result exceeds the supported date range 1290 */ 1291 public OffsetDateTime plusHours(long hours) { 1292 return with(dateTime.plusHours(hours), offset); 1293 } 1294 1295 /** 1296 * Returns a copy of this {@code OffsetDateTime} with the specified number of minutes added. 1297 * <p> 1298 * This instance is immutable and unaffected by this method call. 1299 * 1300 * @param minutes the minutes to add, may be negative 1301 * @return an {@code OffsetDateTime} based on this date-time with the minutes added, not null 1302 * @throws DateTimeException if the result exceeds the supported date range 1303 */ 1304 public OffsetDateTime plusMinutes(long minutes) { 1305 return with(dateTime.plusMinutes(minutes), offset); 1306 } 1307 1308 /** 1309 * Returns a copy of this {@code OffsetDateTime} with the specified number of seconds added. 1310 * <p> 1311 * This instance is immutable and unaffected by this method call. 1312 * 1313 * @param seconds the seconds to add, may be negative 1314 * @return an {@code OffsetDateTime} based on this date-time with the seconds added, not null 1315 * @throws DateTimeException if the result exceeds the supported date range 1316 */ 1317 public OffsetDateTime plusSeconds(long seconds) { 1318 return with(dateTime.plusSeconds(seconds), offset); 1319 } 1320 1321 /** 1322 * Returns a copy of this {@code OffsetDateTime} with the specified number of nanoseconds added. 1323 * <p> 1324 * This instance is immutable and unaffected by this method call. 1325 * 1326 * @param nanos the nanos to add, may be negative 1327 * @return an {@code OffsetDateTime} based on this date-time with the nanoseconds added, not null 1328 * @throws DateTimeException if the unit cannot be added to this type 1329 */ 1330 public OffsetDateTime plusNanos(long nanos) { 1331 return with(dateTime.plusNanos(nanos), offset); 1332 } 1333 1334 //----------------------------------------------------------------------- 1335 /** 1336 * Returns a copy of this date-time with the specified amount subtracted. 1337 * <p> 1338 * This returns an {@code OffsetDateTime}, based on this one, with the specified amount subtracted. 1339 * The amount is typically {@link Period} or {@link Duration} but may be 1340 * any other type implementing the {@link TemporalAmount} interface. 1341 * <p> 1342 * The calculation is delegated to the amount object by calling 1343 * {@link TemporalAmount#subtractFrom(Temporal)}. The amount implementation is free 1344 * to implement the subtraction in any way it wishes, however it typically 1345 * calls back to {@link #minus(long, TemporalUnit)}. Consult the documentation 1346 * of the amount implementation to determine if it can be successfully subtracted. 1347 * <p> 1348 * This instance is immutable and unaffected by this method call. 1349 * 1350 * @param amountToSubtract the amount to subtract, not null 1351 * @return an {@code OffsetDateTime} based on this date-time with the subtraction made, not null 1352 * @throws DateTimeException if the subtraction cannot be made 1353 * @throws ArithmeticException if numeric overflow occurs 1354 */ 1355 @Override 1356 public OffsetDateTime minus(TemporalAmount amountToSubtract) { 1357 return (OffsetDateTime) amountToSubtract.subtractFrom(this); 1358 } 1359 1360 /** 1361 * Returns a copy of this date-time with the specified amount subtracted. 1362 * <p> 1363 * This returns an {@code OffsetDateTime}, based on this one, with the amount 1364 * in terms of the unit subtracted. If it is not possible to subtract the amount, 1365 * because the unit is not supported or for some other reason, an exception is thrown. 1366 * <p> 1367 * This method is equivalent to {@link #plus(long, TemporalUnit)} with the amount negated. 1368 * See that method for a full description of how addition, and thus subtraction, works. 1369 * <p> 1370 * This instance is immutable and unaffected by this method call. 1371 * 1372 * @param amountToSubtract the amount of the unit to subtract from the result, may be negative 1373 * @param unit the unit of the amount to subtract, not null 1374 * @return an {@code OffsetDateTime} based on this date-time with the specified amount subtracted, not null 1375 * @throws DateTimeException if the subtraction cannot be made 1376 * @throws UnsupportedTemporalTypeException if the unit is not supported 1377 * @throws ArithmeticException if numeric overflow occurs 1378 */ 1379 @Override 1380 public OffsetDateTime minus(long amountToSubtract, TemporalUnit unit) { 1381 return (amountToSubtract == Long.MIN_VALUE ? plus(Long.MAX_VALUE, unit).plus(1, unit) : plus(-amountToSubtract, unit)); 1382 } 1383 1384 //----------------------------------------------------------------------- 1385 /** 1386 * Returns a copy of this {@code OffsetDateTime} with the specified number of years subtracted. 1387 * <p> 1388 * This method subtracts the specified amount from the years field in three steps: 1389 * <ol> 1390 * <li>Subtract the input years from the year field</li> 1391 * <li>Check if the resulting date would be invalid</li> 1392 * <li>Adjust the day-of-month to the last valid day if necessary</li> 1393 * </ol> 1394 * <p> 1395 * For example, 2008-02-29 (leap year) minus one year would result in the 1396 * invalid date 2007-02-29 (standard year). Instead of returning an invalid 1397 * result, the last valid day of the month, 2007-02-28, is selected instead. 1398 * <p> 1399 * This instance is immutable and unaffected by this method call. 1400 * 1401 * @param years the years to subtract, may be negative 1402 * @return an {@code OffsetDateTime} based on this date-time with the years subtracted, not null 1403 * @throws DateTimeException if the result exceeds the supported date range 1404 */ 1405 public OffsetDateTime minusYears(long years) { 1406 return (years == Long.MIN_VALUE ? plusYears(Long.MAX_VALUE).plusYears(1) : plusYears(-years)); 1407 } 1408 1409 /** 1410 * Returns a copy of this {@code OffsetDateTime} with the specified number of months subtracted. 1411 * <p> 1412 * This method subtracts the specified amount from the months field in three steps: 1413 * <ol> 1414 * <li>Subtract the input months from the month-of-year field</li> 1415 * <li>Check if the resulting date would be invalid</li> 1416 * <li>Adjust the day-of-month to the last valid day if necessary</li> 1417 * </ol> 1418 * <p> 1419 * For example, 2007-03-31 minus one month would result in the invalid date 1420 * 2007-02-31. Instead of returning an invalid result, the last valid day 1421 * of the month, 2007-02-28, is selected instead. 1422 * <p> 1423 * This instance is immutable and unaffected by this method call. 1424 * 1425 * @param months the months to subtract, may be negative 1426 * @return an {@code OffsetDateTime} based on this date-time with the months subtracted, not null 1427 * @throws DateTimeException if the result exceeds the supported date range 1428 */ 1429 public OffsetDateTime minusMonths(long months) { 1430 return (months == Long.MIN_VALUE ? plusMonths(Long.MAX_VALUE).plusMonths(1) : plusMonths(-months)); 1431 } 1432 1433 /** 1434 * Returns a copy of this {@code OffsetDateTime} with the specified number of weeks subtracted. 1435 * <p> 1436 * This method subtracts the specified amount in weeks from the days field decrementing 1437 * the month and year fields as necessary to ensure the result remains valid. 1438 * The result is only invalid if the maximum/minimum year is exceeded. 1439 * <p> 1440 * For example, 2009-01-07 minus one week would result in 2008-12-31. 1441 * <p> 1442 * This instance is immutable and unaffected by this method call. 1443 * 1444 * @param weeks the weeks to subtract, may be negative 1445 * @return an {@code OffsetDateTime} based on this date-time with the weeks subtracted, not null 1446 * @throws DateTimeException if the result exceeds the supported date range 1447 */ 1448 public OffsetDateTime minusWeeks(long weeks) { 1449 return (weeks == Long.MIN_VALUE ? plusWeeks(Long.MAX_VALUE).plusWeeks(1) : plusWeeks(-weeks)); 1450 } 1451 1452 /** 1453 * Returns a copy of this {@code OffsetDateTime} with the specified number of days subtracted. 1454 * <p> 1455 * This method subtracts the specified amount from the days field decrementing the 1456 * month and year fields as necessary to ensure the result remains valid. 1457 * The result is only invalid if the maximum/minimum year is exceeded. 1458 * <p> 1459 * For example, 2009-01-01 minus one day would result in 2008-12-31. 1460 * <p> 1461 * This instance is immutable and unaffected by this method call. 1462 * 1463 * @param days the days to subtract, may be negative 1464 * @return an {@code OffsetDateTime} based on this date-time with the days subtracted, not null 1465 * @throws DateTimeException if the result exceeds the supported date range 1466 */ 1467 public OffsetDateTime minusDays(long days) { 1468 return (days == Long.MIN_VALUE ? plusDays(Long.MAX_VALUE).plusDays(1) : plusDays(-days)); 1469 } 1470 1471 /** 1472 * Returns a copy of this {@code OffsetDateTime} with the specified number of hours subtracted. 1473 * <p> 1474 * This instance is immutable and unaffected by this method call. 1475 * 1476 * @param hours the hours to subtract, may be negative 1477 * @return an {@code OffsetDateTime} based on this date-time with the hours subtracted, not null 1478 * @throws DateTimeException if the result exceeds the supported date range 1479 */ 1480 public OffsetDateTime minusHours(long hours) { 1481 return (hours == Long.MIN_VALUE ? plusHours(Long.MAX_VALUE).plusHours(1) : plusHours(-hours)); 1482 } 1483 1484 /** 1485 * Returns a copy of this {@code OffsetDateTime} with the specified number of minutes subtracted. 1486 * <p> 1487 * This instance is immutable and unaffected by this method call. 1488 * 1489 * @param minutes the minutes to subtract, may be negative 1490 * @return an {@code OffsetDateTime} based on this date-time with the minutes subtracted, not null 1491 * @throws DateTimeException if the result exceeds the supported date range 1492 */ 1493 public OffsetDateTime minusMinutes(long minutes) { 1494 return (minutes == Long.MIN_VALUE ? plusMinutes(Long.MAX_VALUE).plusMinutes(1) : plusMinutes(-minutes)); 1495 } 1496 1497 /** 1498 * Returns a copy of this {@code OffsetDateTime} with the specified number of seconds subtracted. 1499 * <p> 1500 * This instance is immutable and unaffected by this method call. 1501 * 1502 * @param seconds the seconds to subtract, may be negative 1503 * @return an {@code OffsetDateTime} based on this date-time with the seconds subtracted, not null 1504 * @throws DateTimeException if the result exceeds the supported date range 1505 */ 1506 public OffsetDateTime minusSeconds(long seconds) { 1507 return (seconds == Long.MIN_VALUE ? plusSeconds(Long.MAX_VALUE).plusSeconds(1) : plusSeconds(-seconds)); 1508 } 1509 1510 /** 1511 * Returns a copy of this {@code OffsetDateTime} with the specified number of nanoseconds subtracted. 1512 * <p> 1513 * This instance is immutable and unaffected by this method call. 1514 * 1515 * @param nanos the nanos to subtract, may be negative 1516 * @return an {@code OffsetDateTime} based on this date-time with the nanoseconds subtracted, not null 1517 * @throws DateTimeException if the result exceeds the supported date range 1518 */ 1519 public OffsetDateTime minusNanos(long nanos) { 1520 return (nanos == Long.MIN_VALUE ? plusNanos(Long.MAX_VALUE).plusNanos(1) : plusNanos(-nanos)); 1521 } 1522 1523 //----------------------------------------------------------------------- 1524 /** 1525 * Queries this date-time using the specified query. 1526 * <p> 1527 * This queries this date-time using the specified query strategy object. 1528 * The {@code TemporalQuery} object defines the logic to be used to 1529 * obtain the result. Read the documentation of the query to understand 1530 * what the result of this method will be. 1531 * <p> 1532 * The result of this method is obtained by invoking the 1533 * {@link TemporalQuery#queryFrom(TemporalAccessor)} method on the 1534 * specified query passing {@code this} as the argument. 1535 * 1536 * @param <R> the type of the result 1537 * @param query the query to invoke, not null 1538 * @return the query result, null may be returned (defined by the query) 1539 * @throws DateTimeException if unable to query (defined by the query) 1540 * @throws ArithmeticException if numeric overflow occurs (defined by the query) 1541 */ 1542 @SuppressWarnings("unchecked") 1543 @Override 1544 public <R> R query(TemporalQuery<R> query) { 1545 if (query == TemporalQueries.offset() || query == TemporalQueries.zone()) { 1546 return (R) getOffset(); 1547 } else if (query == TemporalQueries.zoneId()) { 1548 return null; 1549 } else if (query == TemporalQueries.localDate()) { 1550 return (R) toLocalDate(); 1551 } else if (query == TemporalQueries.localTime()) { 1552 return (R) toLocalTime(); 1553 } else if (query == TemporalQueries.chronology()) { 1554 return (R) IsoChronology.INSTANCE; 1555 } else if (query == TemporalQueries.precision()) { 1556 return (R) NANOS; 1557 } 1558 // inline TemporalAccessor.super.query(query) as an optimization 1559 // non-JDK classes are not permitted to make this optimization 1560 return query.queryFrom(this); 1561 } 1562 1563 /** 1564 * Adjusts the specified temporal object to have the same offset, date 1565 * and time as this object. 1566 * <p> 1567 * This returns a temporal object of the same observable type as the input 1568 * with the offset, date and time changed to be the same as this. 1569 * <p> 1570 * The adjustment is equivalent to using {@link Temporal#with(TemporalField, long)} 1571 * three times, passing {@link ChronoField#EPOCH_DAY}, 1572 * {@link ChronoField#NANO_OF_DAY} and {@link ChronoField#OFFSET_SECONDS} as the fields. 1573 * <p> 1574 * In most cases, it is clearer to reverse the calling pattern by using 1575 * {@link Temporal#with(TemporalAdjuster)}: 1576 * <pre> 1577 * // these two lines are equivalent, but the second approach is recommended 1578 * temporal = thisOffsetDateTime.adjustInto(temporal); 1579 * temporal = temporal.with(thisOffsetDateTime); 1580 * </pre> 1581 * <p> 1582 * This instance is immutable and unaffected by this method call. 1583 * 1584 * @param temporal the target object to be adjusted, not null 1585 * @return the adjusted object, not null 1586 * @throws DateTimeException if unable to make the adjustment 1587 * @throws ArithmeticException if numeric overflow occurs 1588 */ 1589 @Override 1590 public Temporal adjustInto(Temporal temporal) { 1591 // OffsetDateTime is treated as three separate fields, not an instant 1592 // this produces the most consistent set of results overall 1593 // the offset is set after the date and time, as it is typically a small 1594 // tweak to the result, with ZonedDateTime frequently ignoring the offset 1595 return temporal 1596 .with(EPOCH_DAY, toLocalDate().toEpochDay()) 1597 .with(NANO_OF_DAY, toLocalTime().toNanoOfDay()) 1598 .with(OFFSET_SECONDS, getOffset().getTotalSeconds()); 1599 } 1600 1601 /** 1602 * Calculates the amount of time until another date-time in terms of the specified unit. 1603 * <p> 1604 * This calculates the amount of time between two {@code OffsetDateTime} 1605 * objects in terms of a single {@code TemporalUnit}. 1606 * The start and end points are {@code this} and the specified date-time. 1607 * The result will be negative if the end is before the start. 1608 * For example, the amount in days between two date-times can be calculated 1609 * using {@code startDateTime.until(endDateTime, DAYS)}. 1610 * <p> 1611 * The {@code Temporal} passed to this method is converted to a 1612 * {@code OffsetDateTime} using {@link #from(TemporalAccessor)}. 1613 * If the offset differs between the two date-times, the specified 1614 * end date-time is normalized to have the same offset as this date-time. 1615 * <p> 1616 * The calculation returns a whole number, representing the number of 1617 * complete units between the two date-times. 1618 * For example, the amount in months between 2012-06-15T00:00Z and 2012-08-14T23:59Z 1619 * will only be one month as it is one minute short of two months. 1620 * <p> 1621 * There are two equivalent ways of using this method. 1622 * The first is to invoke this method. 1623 * The second is to use {@link TemporalUnit#between(Temporal, Temporal)}: 1624 * <pre> 1625 * // these two lines are equivalent 1626 * amount = start.until(end, MONTHS); 1627 * amount = MONTHS.between(start, end); 1628 * </pre> 1629 * The choice should be made based on which makes the code more readable. 1630 * <p> 1631 * The calculation is implemented in this method for {@link ChronoUnit}. 1632 * The units {@code NANOS}, {@code MICROS}, {@code MILLIS}, {@code SECONDS}, 1633 * {@code MINUTES}, {@code HOURS} and {@code HALF_DAYS}, {@code DAYS}, 1634 * {@code WEEKS}, {@code MONTHS}, {@code YEARS}, {@code DECADES}, 1635 * {@code CENTURIES}, {@code MILLENNIA} and {@code ERAS} are supported. 1636 * Other {@code ChronoUnit} values will throw an exception. 1637 * <p> 1638 * If the unit is not a {@code ChronoUnit}, then the result of this method 1639 * is obtained by invoking {@code TemporalUnit.between(Temporal, Temporal)} 1640 * passing {@code this} as the first argument and the converted input temporal 1641 * as the second argument. 1642 * <p> 1643 * This instance is immutable and unaffected by this method call. 1644 * 1645 * @param endExclusive the end date, exclusive, which is converted to an {@code OffsetDateTime}, not null 1646 * @param unit the unit to measure the amount in, not null 1647 * @return the amount of time between this date-time and the end date-time 1648 * @throws DateTimeException if the amount cannot be calculated, or the end 1649 * temporal cannot be converted to an {@code OffsetDateTime} 1650 * @throws UnsupportedTemporalTypeException if the unit is not supported 1651 * @throws ArithmeticException if numeric overflow occurs 1652 */ 1653 @Override 1654 public long until(Temporal endExclusive, TemporalUnit unit) { 1655 OffsetDateTime end = OffsetDateTime.from(endExclusive); 1656 if (unit instanceof ChronoUnit) { 1657 OffsetDateTime start = this; 1658 try { 1659 end = end.withOffsetSameInstant(offset); 1660 } catch (DateTimeException ex) { 1661 // end may be out of valid range. Adjust to end's offset. 1662 start = withOffsetSameInstant(end.offset); 1663 } 1664 return start.dateTime.until(end.dateTime, unit); 1665 } 1666 return unit.between(this, end); 1667 } 1668 1669 /** 1670 * Formats this date-time using the specified formatter. 1671 * <p> 1672 * This date-time will be passed to the formatter to produce a string. 1673 * 1674 * @param formatter the formatter to use, not null 1675 * @return the formatted date-time string, not null 1676 * @throws DateTimeException if an error occurs during printing 1677 */ 1678 public String format(DateTimeFormatter formatter) { 1679 Objects.requireNonNull(formatter, "formatter"); 1680 return formatter.format(this); 1681 } 1682 1683 //----------------------------------------------------------------------- 1684 /** 1685 * Combines this date-time with a time-zone to create a {@code ZonedDateTime} 1686 * ensuring that the result has the same instant. 1687 * <p> 1688 * This returns a {@code ZonedDateTime} formed from this date-time and the specified time-zone. 1689 * This conversion will ignore the visible local date-time and use the underlying instant instead. 1690 * This avoids any problems with local time-line gaps or overlaps. 1691 * The result might have different values for fields such as hour, minute an even day. 1692 * <p> 1693 * To attempt to retain the values of the fields, use {@link #atZoneSimilarLocal(ZoneId)}. 1694 * To use the offset as the zone ID, use {@link #toZonedDateTime()}. 1695 * 1696 * @param zone the time-zone to use, not null 1697 * @return the zoned date-time formed from this date-time, not null 1698 */ 1699 public ZonedDateTime atZoneSameInstant(ZoneId zone) { 1700 return ZonedDateTime.ofInstant(dateTime, offset, zone); 1701 } 1702 1703 /** 1704 * Combines this date-time with a time-zone to create a {@code ZonedDateTime} 1705 * trying to keep the same local date and time. 1706 * <p> 1707 * This returns a {@code ZonedDateTime} formed from this date-time and the specified time-zone. 1708 * Where possible, the result will have the same local date-time as this object. 1709 * <p> 1710 * Time-zone rules, such as daylight savings, mean that not every time on the 1711 * local time-line exists. If the local date-time is in a gap or overlap according to 1712 * the rules then a resolver is used to determine the resultant local time and offset. 1713 * This method uses {@link ZonedDateTime#ofLocal(LocalDateTime, ZoneId, ZoneOffset)} 1714 * to retain the offset from this instance if possible. 1715 * <p> 1716 * Finer control over gaps and overlaps is available in two ways. 1717 * If you simply want to use the later offset at overlaps then call 1718 * {@link ZonedDateTime#withLaterOffsetAtOverlap()} immediately after this method. 1719 * <p> 1720 * To create a zoned date-time at the same instant irrespective of the local time-line, 1721 * use {@link #atZoneSameInstant(ZoneId)}. 1722 * To use the offset as the zone ID, use {@link #toZonedDateTime()}. 1723 * 1724 * @param zone the time-zone to use, not null 1725 * @return the zoned date-time formed from this date and the earliest valid time for the zone, not null 1726 */ 1727 public ZonedDateTime atZoneSimilarLocal(ZoneId zone) { 1728 return ZonedDateTime.ofLocal(dateTime, zone, offset); 1729 } 1730 1731 //----------------------------------------------------------------------- 1732 /** 1733 * Converts this date-time to an {@code OffsetTime}. 1734 * <p> 1735 * This returns an offset time with the same local time and offset. 1736 * 1737 * @return an OffsetTime representing the time and offset, not null 1738 */ 1739 public OffsetTime toOffsetTime() { 1740 return OffsetTime.of(dateTime.toLocalTime(), offset); 1741 } 1742 1743 /** 1744 * Converts this date-time to a {@code ZonedDateTime} using the offset as the zone ID. 1745 * <p> 1746 * This creates the simplest possible {@code ZonedDateTime} using the offset 1747 * as the zone ID. 1748 * <p> 1749 * To control the time-zone used, see {@link #atZoneSameInstant(ZoneId)} and 1750 * {@link #atZoneSimilarLocal(ZoneId)}. 1751 * 1752 * @return a zoned date-time representing the same local date-time and offset, not null 1753 */ 1754 public ZonedDateTime toZonedDateTime() { 1755 return ZonedDateTime.of(dateTime, offset); 1756 } 1757 1758 /** 1759 * Converts this date-time to an {@code Instant}. 1760 * <p> 1761 * This returns an {@code Instant} representing the same point on the 1762 * time-line as this date-time. 1763 * 1764 * @return an {@code Instant} representing the same instant, not null 1765 */ 1766 public Instant toInstant() { 1767 return dateTime.toInstant(offset); 1768 } 1769 1770 /** 1771 * Converts this date-time to the number of seconds from the epoch of 1970-01-01T00:00:00Z. 1772 * <p> 1773 * This allows this date-time to be converted to a value of the 1774 * {@link ChronoField#INSTANT_SECONDS epoch-seconds} field. This is primarily 1775 * intended for low-level conversions rather than general application usage. 1776 * 1777 * @return the number of seconds from the epoch of 1970-01-01T00:00:00Z 1778 */ 1779 public long toEpochSecond() { 1780 return dateTime.toEpochSecond(offset); 1781 } 1782 1783 //----------------------------------------------------------------------- 1784 /** 1785 * Compares this date-time to another date-time. 1786 * <p> 1787 * The comparison is based on the instant then on the local date-time. 1788 * It is "consistent with equals", as defined by {@link Comparable}. 1789 * <p> 1790 * For example, the following is the comparator order: 1791 * <ol> 1792 * <li>{@code 2008-12-03T10:30+01:00}</li> 1793 * <li>{@code 2008-12-03T11:00+01:00}</li> 1794 * <li>{@code 2008-12-03T12:00+02:00}</li> 1795 * <li>{@code 2008-12-03T11:30+01:00}</li> 1796 * <li>{@code 2008-12-03T12:00+01:00}</li> 1797 * <li>{@code 2008-12-03T12:30+01:00}</li> 1798 * </ol> 1799 * Values #2 and #3 represent the same instant on the time-line. 1800 * When two values represent the same instant, the local date-time is compared 1801 * to distinguish them. This step is needed to make the ordering 1802 * consistent with {@code equals()}. 1803 * 1804 * @param other the other date-time to compare to, not null 1805 * @return the comparator value, negative if less, positive if greater 1806 */ 1807 @Override 1808 public int compareTo(OffsetDateTime other) { 1809 int cmp = compareInstant(this, other); 1810 if (cmp == 0) { 1811 cmp = toLocalDateTime().compareTo(other.toLocalDateTime()); 1812 } 1813 return cmp; 1814 } 1815 1816 //----------------------------------------------------------------------- 1817 /** 1818 * Checks if the instant of this date-time is after that of the specified date-time. 1819 * <p> 1820 * This method differs from the comparison in {@link #compareTo} and {@link #equals} in that it 1821 * only compares the instant of the date-time. This is equivalent to using 1822 * {@code dateTime1.toInstant().isAfter(dateTime2.toInstant());}. 1823 * 1824 * @param other the other date-time to compare to, not null 1825 * @return true if this is after the instant of the specified date-time 1826 */ 1827 public boolean isAfter(OffsetDateTime other) { 1828 long thisEpochSec = toEpochSecond(); 1829 long otherEpochSec = other.toEpochSecond(); 1830 return thisEpochSec > otherEpochSec || 1831 (thisEpochSec == otherEpochSec && toLocalTime().getNano() > other.toLocalTime().getNano()); 1832 } 1833 1834 /** 1835 * Checks if the instant of this date-time is before that of the specified date-time. 1836 * <p> 1837 * This method differs from the comparison in {@link #compareTo} in that it 1838 * only compares the instant of the date-time. This is equivalent to using 1839 * {@code dateTime1.toInstant().isBefore(dateTime2.toInstant());}. 1840 * 1841 * @param other the other date-time to compare to, not null 1842 * @return true if this is before the instant of the specified date-time 1843 */ 1844 public boolean isBefore(OffsetDateTime other) { 1845 long thisEpochSec = toEpochSecond(); 1846 long otherEpochSec = other.toEpochSecond(); 1847 return thisEpochSec < otherEpochSec || 1848 (thisEpochSec == otherEpochSec && toLocalTime().getNano() < other.toLocalTime().getNano()); 1849 } 1850 1851 /** 1852 * Checks if the instant of this date-time is equal to that of the specified date-time. 1853 * <p> 1854 * This method differs from the comparison in {@link #compareTo} and {@link #equals} 1855 * in that it only compares the instant of the date-time. This is equivalent to using 1856 * {@code dateTime1.toInstant().equals(dateTime2.toInstant());}. 1857 * 1858 * @param other the other date-time to compare to, not null 1859 * @return true if the instant equals the instant of the specified date-time 1860 */ 1861 public boolean isEqual(OffsetDateTime other) { 1862 return toEpochSecond() == other.toEpochSecond() && 1863 toLocalTime().getNano() == other.toLocalTime().getNano(); 1864 } 1865 1866 //----------------------------------------------------------------------- 1867 /** 1868 * Checks if this date-time is equal to another date-time. 1869 * <p> 1870 * The comparison is based on the local date-time and the offset. 1871 * To compare for the same instant on the time-line, use {@link #isEqual}. 1872 * Only objects of type {@code OffsetDateTime} are compared, other types return false. 1873 * 1874 * @param obj the object to check, null returns false 1875 * @return true if this is equal to the other date-time 1876 */ 1877 @Override 1878 public boolean equals(Object obj) { 1879 if (this == obj) { 1880 return true; 1881 } 1882 if (obj instanceof OffsetDateTime) { 1883 OffsetDateTime other = (OffsetDateTime) obj; 1884 return dateTime.equals(other.dateTime) && offset.equals(other.offset); 1885 } 1886 return false; 1887 } 1888 1889 /** 1890 * A hash code for this date-time. 1891 * 1892 * @return a suitable hash code 1893 */ 1894 @Override 1895 public int hashCode() { 1896 return dateTime.hashCode() ^ offset.hashCode(); 1897 } 1898 1899 //----------------------------------------------------------------------- 1900 /** 1901 * Outputs this date-time as a {@code String}, such as {@code 2007-12-03T10:15:30+01:00}. 1902 * <p> 1903 * The output will be one of the following ISO-8601 formats: 1904 * <ul> 1905 * <li>{@code uuuu-MM-dd'T'HH:mmXXXXX}</li> 1906 * <li>{@code uuuu-MM-dd'T'HH:mm:ssXXXXX}</li> 1907 * <li>{@code uuuu-MM-dd'T'HH:mm:ss.SSSXXXXX}</li> 1908 * <li>{@code uuuu-MM-dd'T'HH:mm:ss.SSSSSSXXXXX}</li> 1909 * <li>{@code uuuu-MM-dd'T'HH:mm:ss.SSSSSSSSSXXXXX}</li> 1910 * </ul> 1911 * The format used will be the shortest that outputs the full value of 1912 * the time where the omitted parts are implied to be zero. 1913 * 1914 * @return a string representation of this date-time, not null 1915 */ 1916 @Override 1917 public String toString() { 1918 return dateTime.toString() + offset.toString(); 1919 } 1920 1921 //----------------------------------------------------------------------- 1922 /** 1923 * Writes the object using a 1924 * <a href="{@docRoot}/serialized-form.html#java.time.Ser">dedicated serialized form</a>. 1925 * @serialData 1926 * <pre> 1927 * out.writeByte(10); // identifies an OffsetDateTime 1928 * // the <a href="{@docRoot}/serialized-form.html#java.time.LocalDateTime">datetime</a> excluding the one byte header 1929 * // the <a href="{@docRoot}/serialized-form.html#java.time.ZoneOffset">offset</a> excluding the one byte header 1930 * </pre> 1931 * 1932 * @return the instance of {@code Ser}, not null 1933 */ 1934 private Object writeReplace() { 1935 return new Ser(Ser.OFFSET_DATE_TIME_TYPE, this); 1936 } 1937 1938 /** 1939 * Defend against malicious streams. 1940 * 1941 * @param s the stream to read 1942 * @throws InvalidObjectException always 1943 */ 1944 private void readObject(ObjectInputStream s) throws InvalidObjectException { 1945 throw new InvalidObjectException("Deserialization via serialization delegate"); 1946 } 1947 1948 void writeExternal(ObjectOutput out) throws IOException { 1949 dateTime.writeExternal(out); 1950 offset.writeExternal(out); 1951 } 1952 1953 static OffsetDateTime readExternal(ObjectInput in) throws IOException, ClassNotFoundException { 1954 LocalDateTime dateTime = LocalDateTime.readExternal(in); 1955 ZoneOffset offset = ZoneOffset.readExternal(in); 1956 return OffsetDateTime.of(dateTime, offset); 1957 } 1958 1959 }