15658
|
1 |
/*
|
|
2 |
* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
|
|
3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
4 |
*
|
|
5 |
* This code is free software; you can redistribute it and/or modify it
|
|
6 |
* under the terms of the GNU General Public License version 2 only, as
|
|
7 |
* published by the Free Software Foundation. Oracle designates this
|
|
8 |
* particular file as subject to the "Classpath" exception as provided
|
|
9 |
* by Oracle in the LICENSE file that accompanied this code.
|
|
10 |
*
|
|
11 |
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
12 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
13 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
14 |
* version 2 for more details (a copy is included in the LICENSE file that
|
|
15 |
* accompanied this code).
|
|
16 |
*
|
|
17 |
* You should have received a copy of the GNU General Public License version
|
|
18 |
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
19 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
20 |
*
|
|
21 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
22 |
* or visit www.oracle.com if you need additional information or have any
|
|
23 |
* questions.
|
|
24 |
*/
|
|
25 |
|
|
26 |
/*
|
|
27 |
* This file is available under and governed by the GNU General Public
|
|
28 |
* License version 2 only, as published by the Free Software Foundation.
|
|
29 |
* However, the following notice accompanied the original version of this
|
|
30 |
* file:
|
|
31 |
*
|
|
32 |
* Copyright (c) 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 |
import static java.time.temporal.ChronoField.ERA;
|
|
66 |
import static java.time.temporal.ChronoField.YEAR;
|
|
67 |
import static java.time.temporal.ChronoUnit.DAYS;
|
|
68 |
|
|
69 |
import java.time.DateTimeException;
|
|
70 |
import java.time.LocalDate;
|
|
71 |
import java.time.LocalTime;
|
|
72 |
import java.time.Period;
|
|
73 |
import java.time.format.DateTimeFormatter;
|
|
74 |
import java.time.temporal.ChronoField;
|
|
75 |
import java.time.temporal.ChronoUnit;
|
|
76 |
import java.time.temporal.Temporal;
|
|
77 |
import java.time.temporal.TemporalAccessor;
|
|
78 |
import java.time.temporal.TemporalAdjuster;
|
|
79 |
import java.time.temporal.TemporalAmount;
|
|
80 |
import java.time.temporal.TemporalField;
|
|
81 |
import java.time.temporal.TemporalQuery;
|
|
82 |
import java.time.temporal.TemporalUnit;
|
16852
|
83 |
import java.time.temporal.UnsupportedTemporalTypeException;
|
15658
|
84 |
import java.util.Comparator;
|
|
85 |
import java.util.Objects;
|
|
86 |
|
|
87 |
/**
|
|
88 |
* A date without time-of-day or time-zone in an arbitrary chronology, intended
|
|
89 |
* for advanced globalization use cases.
|
|
90 |
* <p>
|
|
91 |
* <b>Most applications should declare method signatures, fields and variables
|
|
92 |
* as {@link LocalDate}, not this interface.</b>
|
|
93 |
* <p>
|
|
94 |
* A {@code ChronoLocalDate} is the abstract representation of a date where the
|
|
95 |
* {@code Chronology chronology}, or calendar system, is pluggable.
|
|
96 |
* The date is defined in terms of fields expressed by {@link TemporalField},
|
|
97 |
* where most common implementations are defined in {@link ChronoField}.
|
|
98 |
* The chronology defines how the calendar system operates and the meaning of
|
|
99 |
* the standard fields.
|
|
100 |
*
|
|
101 |
* <h3>When to use this interface</h3>
|
|
102 |
* The design of the API encourages the use of {@code LocalDate} rather than this
|
|
103 |
* interface, even in the case where the application needs to deal with multiple
|
|
104 |
* calendar systems. The rationale for this is explored in the following documentation.
|
|
105 |
* <p>
|
|
106 |
* The primary use case where this interface should be used is where the generic
|
|
107 |
* type parameter {@code <D>} is fully defined as a specific chronology.
|
|
108 |
* In that case, the assumptions of that chronology are known at development
|
|
109 |
* time and specified in the code.
|
|
110 |
* <p>
|
|
111 |
* When the chronology is defined in the generic type parameter as ? or otherwise
|
|
112 |
* unknown at development time, the rest of the discussion below applies.
|
|
113 |
* <p>
|
|
114 |
* To emphasize the point, declaring a method signature, field or variable as this
|
|
115 |
* interface type can initially seem like the sensible way to globalize an application,
|
|
116 |
* however it is usually the wrong approach.
|
|
117 |
* As such, it should be considered an application-wide architectural decision to choose
|
|
118 |
* to use this interface as opposed to {@code LocalDate}.
|
|
119 |
*
|
|
120 |
* <h3>Architectural issues to consider</h3>
|
|
121 |
* These are some of the points that must be considered before using this interface
|
|
122 |
* throughout an application.
|
|
123 |
* <p>
|
|
124 |
* 1) Applications using this interface, as opposed to using just {@code LocalDate},
|
|
125 |
* face a significantly higher probability of bugs. This is because the calendar system
|
|
126 |
* in use is not known at development time. A key cause of bugs is where the developer
|
|
127 |
* applies assumptions from their day-to-day knowledge of the ISO calendar system
|
|
128 |
* to code that is intended to deal with any arbitrary calendar system.
|
|
129 |
* The section below outlines how those assumptions can cause problems
|
|
130 |
* The primary mechanism for reducing this increased risk of bugs is a strong code review process.
|
|
131 |
* This should also be considered a extra cost in maintenance for the lifetime of the code.
|
|
132 |
* <p>
|
|
133 |
* 2) This interface does not enforce immutability of implementations.
|
|
134 |
* While the implementation notes indicate that all implementations must be immutable
|
|
135 |
* there is nothing in the code or type system to enforce this. Any method declared
|
|
136 |
* to accept a {@code ChronoLocalDate} could therefore be passed a poorly or
|
|
137 |
* maliciously written mutable implementation.
|
|
138 |
* <p>
|
|
139 |
* 3) Applications using this interface must consider the impact of eras.
|
|
140 |
* {@code LocalDate} shields users from the concept of eras, by ensuring that {@code getYear()}
|
|
141 |
* returns the proleptic year. That decision ensures that developers can think of
|
|
142 |
* {@code LocalDate} instances as consisting of three fields - year, month-of-year and day-of-month.
|
|
143 |
* By contrast, users of this interface must think of dates as consisting of four fields -
|
|
144 |
* era, year-of-era, month-of-year and day-of-month. The extra era field is frequently
|
|
145 |
* forgotten, yet it is of vital importance to dates in an arbitrary calendar system.
|
|
146 |
* For example, in the Japanese calendar system, the era represents the reign of an Emperor.
|
|
147 |
* Whenever one reign ends and another starts, the year-of-era is reset to one.
|
|
148 |
* <p>
|
|
149 |
* 4) The only agreed international standard for passing a date between two systems
|
|
150 |
* is the ISO-8601 standard which requires the ISO calendar system. Using this interface
|
|
151 |
* throughout the application will inevitably lead to the requirement to pass the date
|
|
152 |
* across a network or component boundary, requiring an application specific protocol or format.
|
|
153 |
* <p>
|
|
154 |
* 5) Long term persistence, such as a database, will almost always only accept dates in the
|
|
155 |
* ISO-8601 calendar system (or the related Julian-Gregorian). Passing around dates in other
|
|
156 |
* calendar systems increases the complications of interacting with persistence.
|
|
157 |
* <p>
|
|
158 |
* 6) Most of the time, passing a {@code ChronoLocalDate} throughout an application
|
|
159 |
* is unnecessary, as discussed in the last section below.
|
|
160 |
*
|
|
161 |
* <h3>False assumptions causing bugs in multi-calendar system code</h3>
|
|
162 |
* As indicated above, there are many issues to consider when try to use and manipulate a
|
|
163 |
* date in an arbitrary calendar system. These are some of the key issues.
|
|
164 |
* <p>
|
|
165 |
* Code that queries the day-of-month and assumes that the value will never be more than
|
|
166 |
* 31 is invalid. Some calendar systems have more than 31 days in some months.
|
|
167 |
* <p>
|
|
168 |
* Code that adds 12 months to a date and assumes that a year has been added is invalid.
|
|
169 |
* Some calendar systems have a different number of months, such as 13 in the Coptic or Ethiopic.
|
|
170 |
* <p>
|
|
171 |
* Code that adds one month to a date and assumes that the month-of-year value will increase
|
|
172 |
* by one or wrap to the next year is invalid. Some calendar systems have a variable number
|
|
173 |
* of months in a year, such as the Hebrew.
|
|
174 |
* <p>
|
|
175 |
* Code that adds one month, then adds a second one month and assumes that the day-of-month
|
|
176 |
* will remain close to its original value is invalid. Some calendar systems have a large difference
|
|
177 |
* between the length of the longest month and the length of the shortest month.
|
|
178 |
* For example, the Coptic or Ethiopic have 12 months of 30 days and 1 month of 5 days.
|
|
179 |
* <p>
|
|
180 |
* Code that adds seven days and assumes that a week has been added is invalid.
|
|
181 |
* Some calendar systems have weeks of other than seven days, such as the French Revolutionary.
|
|
182 |
* <p>
|
|
183 |
* Code that assumes that because the year of {@code date1} is greater than the year of {@code date2}
|
|
184 |
* then {@code date1} is after {@code date2} is invalid. This is invalid for all calendar systems
|
|
185 |
* when referring to the year-of-era, and especially untrue of the Japanese calendar system
|
|
186 |
* where the year-of-era restarts with the reign of every new Emperor.
|
|
187 |
* <p>
|
|
188 |
* Code that treats month-of-year one and day-of-month one as the start of the year is invalid.
|
|
189 |
* Not all calendar systems start the year when the month value is one.
|
|
190 |
* <p>
|
|
191 |
* In general, manipulating a date, and even querying a date, is wide open to bugs when the
|
|
192 |
* calendar system is unknown at development time. This is why it is essential that code using
|
|
193 |
* this interface is subjected to additional code reviews. It is also why an architectural
|
|
194 |
* decision to avoid this interface type is usually the correct one.
|
|
195 |
*
|
|
196 |
* <h3>Using LocalDate instead</h3>
|
|
197 |
* The primary alternative to using this interface throughout your application is as follows.
|
|
198 |
* <p><ul>
|
|
199 |
* <li>Declare all method signatures referring to dates in terms of {@code LocalDate}.
|
|
200 |
* <li>Either store the chronology (calendar system) in the user profile or lookup
|
|
201 |
* the chronology from the user locale
|
|
202 |
* <li>Convert the ISO {@code LocalDate} to and from the user's preferred calendar system during
|
|
203 |
* printing and parsing
|
|
204 |
* </ul><p>
|
|
205 |
* This approach treats the problem of globalized calendar systems as a localization issue
|
|
206 |
* and confines it to the UI layer. This approach is in keeping with other localization
|
|
207 |
* issues in the java platform.
|
|
208 |
* <p>
|
|
209 |
* As discussed above, performing calculations on a date where the rules of the calendar system
|
|
210 |
* are pluggable requires skill and is not recommended.
|
|
211 |
* Fortunately, the need to perform calculations on a date in an arbitrary calendar system
|
|
212 |
* is extremely rare. For example, it is highly unlikely that the business rules of a library
|
|
213 |
* book rental scheme will allow rentals to be for one month, where meaning of the month
|
|
214 |
* is dependent on the user's preferred calendar system.
|
|
215 |
* <p>
|
|
216 |
* A key use case for calculations on a date in an arbitrary calendar system is producing
|
|
217 |
* a month-by-month calendar for display and user interaction. Again, this is a UI issue,
|
|
218 |
* and use of this interface solely within a few methods of the UI layer may be justified.
|
|
219 |
* <p>
|
|
220 |
* In any other part of the system, where a date must be manipulated in a calendar system
|
|
221 |
* other than ISO, the use case will generally specify the calendar system to use.
|
|
222 |
* For example, an application may need to calculate the next Islamic or Hebrew holiday
|
|
223 |
* which may require manipulating the date.
|
|
224 |
* This kind of use case can be handled as follows:
|
|
225 |
* <p><ul>
|
|
226 |
* <li>start from the ISO {@code LocalDate} being passed to the method
|
|
227 |
* <li>convert the date to the alternate calendar system, which for this use case is known
|
|
228 |
* rather than arbitrary
|
|
229 |
* <li>perform the calculation
|
|
230 |
* <li>convert back to {@code LocalDate}
|
|
231 |
* </ul><p>
|
|
232 |
* Developers writing low-level frameworks or libraries should also avoid this interface.
|
|
233 |
* Instead, one of the two general purpose access interfaces should be used.
|
|
234 |
* Use {@link TemporalAccessor} if read-only access is required, or use {@link Temporal}
|
|
235 |
* if read-write access is required.
|
|
236 |
*
|
17474
|
237 |
* @implSpec
|
15658
|
238 |
* This interface must be implemented with care to ensure other classes operate correctly.
|
|
239 |
* All implementations that can be instantiated must be final, immutable and thread-safe.
|
|
240 |
* Subclasses should be Serializable wherever possible.
|
|
241 |
* <p>
|
|
242 |
* Additional calendar systems may be added to the system.
|
|
243 |
* See {@link Chronology} for more details.
|
|
244 |
*
|
|
245 |
* @param <D> the concrete type for the date
|
|
246 |
* @since 1.8
|
|
247 |
*/
|
|
248 |
public interface ChronoLocalDate<D extends ChronoLocalDate<D>>
|
|
249 |
extends Temporal, TemporalAdjuster, Comparable<ChronoLocalDate<?>> {
|
|
250 |
|
|
251 |
/**
|
16852
|
252 |
* Gets a comparator that compares {@code ChronoLocalDate} in
|
|
253 |
* time-line order ignoring the chronology.
|
15658
|
254 |
* <p>
|
|
255 |
* This comparator differs from the comparison in {@link #compareTo} in that it
|
|
256 |
* only compares the underlying date and not the chronology.
|
|
257 |
* This allows dates in different calendar systems to be compared based
|
16852
|
258 |
* on the position of the date on the local time-line.
|
|
259 |
* The underlying comparison is equivalent to comparing the epoch-day.
|
17474
|
260 |
* @return a comparator that compares in time-line order ignoring the chronology
|
15658
|
261 |
*
|
|
262 |
* @see #isAfter
|
|
263 |
* @see #isBefore
|
|
264 |
* @see #isEqual
|
|
265 |
*/
|
16852
|
266 |
static Comparator<ChronoLocalDate<?>> timeLineOrder() {
|
|
267 |
return Chronology.DATE_ORDER;
|
|
268 |
}
|
|
269 |
|
|
270 |
//-----------------------------------------------------------------------
|
|
271 |
/**
|
|
272 |
* Obtains an instance of {@code ChronoLocalDate} from a temporal object.
|
|
273 |
* <p>
|
|
274 |
* This obtains a local date based on the specified temporal.
|
|
275 |
* A {@code TemporalAccessor} represents an arbitrary set of date and time information,
|
|
276 |
* which this factory converts to an instance of {@code ChronoLocalDate}.
|
|
277 |
* <p>
|
|
278 |
* The conversion extracts and combines the chronology and the date
|
|
279 |
* from the temporal object. The behavior is equivalent to using
|
|
280 |
* {@link Chronology#date(TemporalAccessor)} with the extracted chronology.
|
|
281 |
* Implementations are permitted to perform optimizations such as accessing
|
|
282 |
* those fields that are equivalent to the relevant objects.
|
|
283 |
* <p>
|
|
284 |
* This method matches the signature of the functional interface {@link TemporalQuery}
|
|
285 |
* allowing it to be used as a query via method reference, {@code ChronoLocalDate::from}.
|
|
286 |
*
|
|
287 |
* @param temporal the temporal object to convert, not null
|
|
288 |
* @return the date, not null
|
|
289 |
* @throws DateTimeException if unable to convert to a {@code ChronoLocalDate}
|
|
290 |
* @see Chronology#date(TemporalAccessor)
|
|
291 |
*/
|
|
292 |
static ChronoLocalDate<?> from(TemporalAccessor temporal) {
|
|
293 |
if (temporal instanceof ChronoLocalDate) {
|
|
294 |
return (ChronoLocalDate<?>) temporal;
|
15658
|
295 |
}
|
16852
|
296 |
Chronology chrono = temporal.query(TemporalQuery.chronology());
|
|
297 |
if (chrono == null) {
|
|
298 |
throw new DateTimeException("Unable to obtain ChronoLocalDate from TemporalAccessor: " + temporal.getClass());
|
|
299 |
}
|
|
300 |
return chrono.date(temporal);
|
|
301 |
}
|
15658
|
302 |
|
|
303 |
//-----------------------------------------------------------------------
|
|
304 |
/**
|
|
305 |
* Gets the chronology of this date.
|
|
306 |
* <p>
|
|
307 |
* The {@code Chronology} represents the calendar system in use.
|
|
308 |
* The era and other fields in {@link ChronoField} are defined by the chronology.
|
|
309 |
*
|
|
310 |
* @return the chronology, not null
|
|
311 |
*/
|
|
312 |
Chronology getChronology();
|
|
313 |
|
|
314 |
/**
|
|
315 |
* Gets the era, as defined by the chronology.
|
|
316 |
* <p>
|
|
317 |
* The era is, conceptually, the largest division of the time-line.
|
|
318 |
* Most calendar systems have a single epoch dividing the time-line into two eras.
|
|
319 |
* However, some have multiple eras, such as one for the reign of each leader.
|
|
320 |
* The exact meaning is determined by the {@code Chronology}.
|
|
321 |
* <p>
|
|
322 |
* All correctly implemented {@code Era} classes are singletons, thus it
|
|
323 |
* is valid code to write {@code date.getEra() == SomeChrono.ERA_NAME)}.
|
|
324 |
* <p>
|
|
325 |
* This default implementation uses {@link Chronology#eraOf(int)}.
|
|
326 |
*
|
|
327 |
* @return the chronology specific era constant applicable at this date, not null
|
|
328 |
*/
|
16852
|
329 |
default Era getEra() {
|
15658
|
330 |
return getChronology().eraOf(get(ERA));
|
|
331 |
}
|
|
332 |
|
|
333 |
/**
|
|
334 |
* Checks if the year is a leap year, as defined by the calendar system.
|
|
335 |
* <p>
|
|
336 |
* A leap-year is a year of a longer length than normal.
|
|
337 |
* The exact meaning is determined by the chronology with the constraint that
|
|
338 |
* a leap-year must imply a year-length longer than a non leap-year.
|
|
339 |
* <p>
|
|
340 |
* This default implementation uses {@link Chronology#isLeapYear(long)}.
|
|
341 |
*
|
|
342 |
* @return true if this date is in a leap year, false otherwise
|
|
343 |
*/
|
16852
|
344 |
default boolean isLeapYear() {
|
15658
|
345 |
return getChronology().isLeapYear(getLong(YEAR));
|
|
346 |
}
|
|
347 |
|
|
348 |
/**
|
|
349 |
* Returns the length of the month represented by this date, as defined by the calendar system.
|
|
350 |
* <p>
|
|
351 |
* This returns the length of the month in days.
|
|
352 |
*
|
|
353 |
* @return the length of the month in days
|
|
354 |
*/
|
|
355 |
int lengthOfMonth();
|
|
356 |
|
|
357 |
/**
|
|
358 |
* Returns the length of the year represented by this date, as defined by the calendar system.
|
|
359 |
* <p>
|
|
360 |
* This returns the length of the year in days.
|
|
361 |
* <p>
|
|
362 |
* The default implementation uses {@link #isLeapYear()} and returns 365 or 366.
|
|
363 |
*
|
|
364 |
* @return the length of the year in days
|
|
365 |
*/
|
16852
|
366 |
default int lengthOfYear() {
|
15658
|
367 |
return (isLeapYear() ? 366 : 365);
|
|
368 |
}
|
|
369 |
|
|
370 |
@Override
|
16852
|
371 |
default boolean isSupported(TemporalField field) {
|
15658
|
372 |
if (field instanceof ChronoField) {
|
16852
|
373 |
return field.isDateBased();
|
15658
|
374 |
}
|
|
375 |
return field != null && field.isSupportedBy(this);
|
|
376 |
}
|
|
377 |
|
|
378 |
//-----------------------------------------------------------------------
|
|
379 |
// override for covariant return type
|
|
380 |
/**
|
|
381 |
* {@inheritDoc}
|
|
382 |
* @throws DateTimeException {@inheritDoc}
|
|
383 |
* @throws ArithmeticException {@inheritDoc}
|
|
384 |
*/
|
|
385 |
@Override
|
16852
|
386 |
default D with(TemporalAdjuster adjuster) {
|
15658
|
387 |
return (D) getChronology().ensureChronoLocalDate(Temporal.super.with(adjuster));
|
|
388 |
}
|
|
389 |
|
|
390 |
/**
|
|
391 |
* {@inheritDoc}
|
|
392 |
* @throws DateTimeException {@inheritDoc}
|
16852
|
393 |
* @throws UnsupportedTemporalTypeException {@inheritDoc}
|
15658
|
394 |
* @throws ArithmeticException {@inheritDoc}
|
|
395 |
*/
|
|
396 |
@Override
|
16852
|
397 |
default D with(TemporalField field, long newValue) {
|
15658
|
398 |
if (field instanceof ChronoField) {
|
16852
|
399 |
throw new UnsupportedTemporalTypeException("Unsupported field: " + field.getName());
|
15658
|
400 |
}
|
|
401 |
return (D) getChronology().ensureChronoLocalDate(field.adjustInto(this, newValue));
|
|
402 |
}
|
|
403 |
|
|
404 |
/**
|
|
405 |
* {@inheritDoc}
|
|
406 |
* @throws DateTimeException {@inheritDoc}
|
|
407 |
* @throws ArithmeticException {@inheritDoc}
|
|
408 |
*/
|
|
409 |
@Override
|
16852
|
410 |
default D plus(TemporalAmount amount) {
|
15658
|
411 |
return (D) getChronology().ensureChronoLocalDate(Temporal.super.plus(amount));
|
|
412 |
}
|
|
413 |
|
|
414 |
/**
|
|
415 |
* {@inheritDoc}
|
|
416 |
* @throws DateTimeException {@inheritDoc}
|
|
417 |
* @throws ArithmeticException {@inheritDoc}
|
|
418 |
*/
|
|
419 |
@Override
|
16852
|
420 |
default D plus(long amountToAdd, TemporalUnit unit) {
|
15658
|
421 |
if (unit instanceof ChronoUnit) {
|
16852
|
422 |
throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit.getName());
|
15658
|
423 |
}
|
|
424 |
return (D) getChronology().ensureChronoLocalDate(unit.addTo(this, amountToAdd));
|
|
425 |
}
|
|
426 |
|
|
427 |
/**
|
|
428 |
* {@inheritDoc}
|
|
429 |
* @throws DateTimeException {@inheritDoc}
|
|
430 |
* @throws ArithmeticException {@inheritDoc}
|
|
431 |
*/
|
|
432 |
@Override
|
16852
|
433 |
default D minus(TemporalAmount amount) {
|
15658
|
434 |
return (D) getChronology().ensureChronoLocalDate(Temporal.super.minus(amount));
|
|
435 |
}
|
|
436 |
|
|
437 |
/**
|
|
438 |
* {@inheritDoc}
|
|
439 |
* @throws DateTimeException {@inheritDoc}
|
16852
|
440 |
* @throws UnsupportedTemporalTypeException {@inheritDoc}
|
15658
|
441 |
* @throws ArithmeticException {@inheritDoc}
|
|
442 |
*/
|
|
443 |
@Override
|
16852
|
444 |
default D minus(long amountToSubtract, TemporalUnit unit) {
|
15658
|
445 |
return (D) getChronology().ensureChronoLocalDate(Temporal.super.minus(amountToSubtract, unit));
|
|
446 |
}
|
|
447 |
|
|
448 |
//-----------------------------------------------------------------------
|
|
449 |
/**
|
|
450 |
* Queries this date using the specified query.
|
|
451 |
* <p>
|
|
452 |
* This queries this date using the specified query strategy object.
|
|
453 |
* The {@code TemporalQuery} object defines the logic to be used to
|
|
454 |
* obtain the result. Read the documentation of the query to understand
|
|
455 |
* what the result of this method will be.
|
|
456 |
* <p>
|
|
457 |
* The result of this method is obtained by invoking the
|
|
458 |
* {@link TemporalQuery#queryFrom(TemporalAccessor)} method on the
|
|
459 |
* specified query passing {@code this} as the argument.
|
|
460 |
*
|
|
461 |
* @param <R> the type of the result
|
|
462 |
* @param query the query to invoke, not null
|
|
463 |
* @return the query result, null may be returned (defined by the query)
|
|
464 |
* @throws DateTimeException if unable to query (defined by the query)
|
|
465 |
* @throws ArithmeticException if numeric overflow occurs (defined by the query)
|
|
466 |
*/
|
|
467 |
@SuppressWarnings("unchecked")
|
|
468 |
@Override
|
16852
|
469 |
default <R> R query(TemporalQuery<R> query) {
|
|
470 |
if (query == TemporalQuery.zoneId() || query == TemporalQuery.zone() || query == TemporalQuery.offset()) {
|
15658
|
471 |
return null;
|
16852
|
472 |
} else if (query == TemporalQuery.localTime()) {
|
15658
|
473 |
return null;
|
16852
|
474 |
} else if (query == TemporalQuery.chronology()) {
|
15658
|
475 |
return (R) getChronology();
|
16852
|
476 |
} else if (query == TemporalQuery.precision()) {
|
15658
|
477 |
return (R) DAYS;
|
|
478 |
}
|
|
479 |
// inline TemporalAccessor.super.query(query) as an optimization
|
|
480 |
// non-JDK classes are not permitted to make this optimization
|
|
481 |
return query.queryFrom(this);
|
|
482 |
}
|
|
483 |
|
|
484 |
/**
|
|
485 |
* Adjusts the specified temporal object to have the same date as this object.
|
|
486 |
* <p>
|
|
487 |
* This returns a temporal object of the same observable type as the input
|
|
488 |
* with the date changed to be the same as this.
|
|
489 |
* <p>
|
|
490 |
* The adjustment is equivalent to using {@link Temporal#with(TemporalField, long)}
|
|
491 |
* passing {@link ChronoField#EPOCH_DAY} as the field.
|
|
492 |
* <p>
|
|
493 |
* In most cases, it is clearer to reverse the calling pattern by using
|
|
494 |
* {@link Temporal#with(TemporalAdjuster)}:
|
|
495 |
* <pre>
|
|
496 |
* // these two lines are equivalent, but the second approach is recommended
|
|
497 |
* temporal = thisLocalDate.adjustInto(temporal);
|
|
498 |
* temporal = temporal.with(thisLocalDate);
|
|
499 |
* </pre>
|
|
500 |
* <p>
|
|
501 |
* This instance is immutable and unaffected by this method call.
|
|
502 |
*
|
|
503 |
* @param temporal the target object to be adjusted, not null
|
|
504 |
* @return the adjusted object, not null
|
|
505 |
* @throws DateTimeException if unable to make the adjustment
|
|
506 |
* @throws ArithmeticException if numeric overflow occurs
|
|
507 |
*/
|
|
508 |
@Override
|
16852
|
509 |
default Temporal adjustInto(Temporal temporal) {
|
15658
|
510 |
return temporal.with(EPOCH_DAY, toEpochDay());
|
|
511 |
}
|
|
512 |
|
|
513 |
/**
|
17474
|
514 |
* Calculates the amount of time until another date in terms of the specified unit.
|
15658
|
515 |
* <p>
|
17474
|
516 |
* This calculates the amount of time between two {@code ChronoLocalDate}
|
|
517 |
* objects in terms of a single {@code TemporalUnit}.
|
15658
|
518 |
* The start and end points are {@code this} and the specified date.
|
|
519 |
* The result will be negative if the end is before the start.
|
|
520 |
* The {@code Temporal} passed to this method must be a
|
|
521 |
* {@code ChronoLocalDate} in the same chronology.
|
|
522 |
* The calculation returns a whole number, representing the number of
|
|
523 |
* complete units between the two dates.
|
17474
|
524 |
* For example, the amount in days between two dates can be calculated
|
15658
|
525 |
* using {@code startDate.periodUntil(endDate, DAYS)}.
|
|
526 |
* <p>
|
|
527 |
* There are two equivalent ways of using this method.
|
|
528 |
* The first is to invoke this method.
|
|
529 |
* The second is to use {@link TemporalUnit#between(Temporal, Temporal)}:
|
|
530 |
* <pre>
|
|
531 |
* // these two lines are equivalent
|
|
532 |
* amount = start.periodUntil(end, MONTHS);
|
|
533 |
* amount = MONTHS.between(start, end);
|
|
534 |
* </pre>
|
|
535 |
* The choice should be made based on which makes the code more readable.
|
|
536 |
* <p>
|
|
537 |
* The calculation is implemented in this method for {@link ChronoUnit}.
|
|
538 |
* The units {@code DAYS}, {@code WEEKS}, {@code MONTHS}, {@code YEARS},
|
|
539 |
* {@code DECADES}, {@code CENTURIES}, {@code MILLENNIA} and {@code ERAS}
|
|
540 |
* should be supported by all implementations.
|
|
541 |
* Other {@code ChronoUnit} values will throw an exception.
|
|
542 |
* <p>
|
|
543 |
* If the unit is not a {@code ChronoUnit}, then the result of this method
|
|
544 |
* is obtained by invoking {@code TemporalUnit.between(Temporal, Temporal)}
|
|
545 |
* passing {@code this} as the first argument and the input temporal as
|
|
546 |
* the second argument.
|
|
547 |
* <p>
|
|
548 |
* This instance is immutable and unaffected by this method call.
|
|
549 |
*
|
|
550 |
* @param endDate the end date, which must be a {@code ChronoLocalDate}
|
|
551 |
* in the same chronology, not null
|
17474
|
552 |
* @param unit the unit to measure the amount in, not null
|
|
553 |
* @return the amount of time between this date and the end date
|
|
554 |
* @throws DateTimeException if the amount cannot be calculated
|
15658
|
555 |
* @throws ArithmeticException if numeric overflow occurs
|
|
556 |
*/
|
|
557 |
@Override // override for Javadoc
|
16852
|
558 |
long periodUntil(Temporal endDate, TemporalUnit unit);
|
15658
|
559 |
|
|
560 |
/**
|
|
561 |
* Calculates the period between this date and another date as a {@code Period}.
|
|
562 |
* <p>
|
|
563 |
* This calculates the period between two dates in terms of years, months and days.
|
|
564 |
* The start and end points are {@code this} and the specified date.
|
|
565 |
* The result will be negative if the end is before the start.
|
16852
|
566 |
* The negative sign will be the same in each of year, month and day.
|
15658
|
567 |
* <p>
|
16852
|
568 |
* The calculation is performed using the chronology of this date.
|
15658
|
569 |
* If necessary, the input date will be converted to match.
|
|
570 |
* <p>
|
|
571 |
* This instance is immutable and unaffected by this method call.
|
|
572 |
*
|
|
573 |
* @param endDate the end date, exclusive, which may be in any chronology, not null
|
|
574 |
* @return the period between this date and the end date, not null
|
|
575 |
* @throws DateTimeException if the period cannot be calculated
|
|
576 |
* @throws ArithmeticException if numeric overflow occurs
|
|
577 |
*/
|
16852
|
578 |
Period periodUntil(ChronoLocalDate<?> endDate);
|
|
579 |
|
|
580 |
/**
|
|
581 |
* Formats this date using the specified formatter.
|
|
582 |
* <p>
|
|
583 |
* This date will be passed to the formatter to produce a string.
|
|
584 |
* <p>
|
|
585 |
* The default implementation must behave as follows:
|
|
586 |
* <pre>
|
|
587 |
* return formatter.format(this);
|
|
588 |
* </pre>
|
|
589 |
*
|
|
590 |
* @param formatter the formatter to use, not null
|
|
591 |
* @return the formatted date string, not null
|
|
592 |
* @throws DateTimeException if an error occurs during printing
|
|
593 |
*/
|
|
594 |
default String format(DateTimeFormatter formatter) {
|
|
595 |
Objects.requireNonNull(formatter, "formatter");
|
|
596 |
return formatter.format(this);
|
|
597 |
}
|
15658
|
598 |
|
|
599 |
//-----------------------------------------------------------------------
|
|
600 |
/**
|
|
601 |
* Combines this date with a time to create a {@code ChronoLocalDateTime}.
|
|
602 |
* <p>
|
|
603 |
* This returns a {@code ChronoLocalDateTime} formed from this date at the specified time.
|
|
604 |
* All possible combinations of date and time are valid.
|
|
605 |
*
|
|
606 |
* @param localTime the local time to use, not null
|
|
607 |
* @return the local date-time formed from this date and the specified time, not null
|
|
608 |
*/
|
16852
|
609 |
default ChronoLocalDateTime<D> atTime(LocalTime localTime) {
|
15658
|
610 |
return (ChronoLocalDateTime<D>)ChronoLocalDateTimeImpl.of(this, localTime);
|
|
611 |
}
|
|
612 |
|
|
613 |
//-----------------------------------------------------------------------
|
|
614 |
/**
|
|
615 |
* Converts this date to the Epoch Day.
|
|
616 |
* <p>
|
|
617 |
* The {@link ChronoField#EPOCH_DAY Epoch Day count} is a simple
|
|
618 |
* incrementing count of days where day 0 is 1970-01-01 (ISO).
|
|
619 |
* This definition is the same for all chronologies, enabling conversion.
|
|
620 |
* <p>
|
|
621 |
* This default implementation queries the {@code EPOCH_DAY} field.
|
|
622 |
*
|
|
623 |
* @return the Epoch Day equivalent to this date
|
|
624 |
*/
|
16852
|
625 |
default long toEpochDay() {
|
15658
|
626 |
return getLong(EPOCH_DAY);
|
|
627 |
}
|
|
628 |
|
|
629 |
//-----------------------------------------------------------------------
|
|
630 |
/**
|
|
631 |
* Compares this date to another date, including the chronology.
|
|
632 |
* <p>
|
|
633 |
* The comparison is based first on the underlying time-line date, then
|
|
634 |
* on the chronology.
|
|
635 |
* It is "consistent with equals", as defined by {@link Comparable}.
|
|
636 |
* <p>
|
|
637 |
* For example, the following is the comparator order:
|
|
638 |
* <ol>
|
|
639 |
* <li>{@code 2012-12-03 (ISO)}</li>
|
|
640 |
* <li>{@code 2012-12-04 (ISO)}</li>
|
|
641 |
* <li>{@code 2555-12-04 (ThaiBuddhist)}</li>
|
|
642 |
* <li>{@code 2012-12-05 (ISO)}</li>
|
|
643 |
* </ol>
|
|
644 |
* Values #2 and #3 represent the same date on the time-line.
|
|
645 |
* When two values represent the same date, the chronology ID is compared to distinguish them.
|
|
646 |
* This step is needed to make the ordering "consistent with equals".
|
|
647 |
* <p>
|
|
648 |
* If all the date objects being compared are in the same chronology, then the
|
|
649 |
* additional chronology stage is not required and only the local date is used.
|
|
650 |
* To compare the dates of two {@code TemporalAccessor} instances, including dates
|
|
651 |
* in two different chronologies, use {@link ChronoField#EPOCH_DAY} as a comparator.
|
|
652 |
* <p>
|
|
653 |
* This default implementation performs the comparison defined above.
|
|
654 |
*
|
|
655 |
* @param other the other date to compare to, not null
|
|
656 |
* @return the comparator value, negative if less, positive if greater
|
|
657 |
*/
|
|
658 |
@Override
|
16852
|
659 |
default int compareTo(ChronoLocalDate<?> other) {
|
15658
|
660 |
int cmp = Long.compare(toEpochDay(), other.toEpochDay());
|
|
661 |
if (cmp == 0) {
|
|
662 |
cmp = getChronology().compareTo(other.getChronology());
|
|
663 |
}
|
|
664 |
return cmp;
|
|
665 |
}
|
|
666 |
|
|
667 |
/**
|
|
668 |
* Checks if this date is after the specified date ignoring the chronology.
|
|
669 |
* <p>
|
|
670 |
* This method differs from the comparison in {@link #compareTo} in that it
|
|
671 |
* only compares the underlying date and not the chronology.
|
|
672 |
* This allows dates in different calendar systems to be compared based
|
|
673 |
* on the time-line position.
|
|
674 |
* This is equivalent to using {@code date1.toEpochDay() > date2.toEpochDay()}.
|
|
675 |
* <p>
|
|
676 |
* This default implementation performs the comparison based on the epoch-day.
|
|
677 |
*
|
|
678 |
* @param other the other date to compare to, not null
|
|
679 |
* @return true if this is after the specified date
|
|
680 |
*/
|
16852
|
681 |
default boolean isAfter(ChronoLocalDate<?> other) {
|
15658
|
682 |
return this.toEpochDay() > other.toEpochDay();
|
|
683 |
}
|
|
684 |
|
|
685 |
/**
|
|
686 |
* Checks if this date is before the specified date ignoring the chronology.
|
|
687 |
* <p>
|
|
688 |
* This method differs from the comparison in {@link #compareTo} in that it
|
|
689 |
* only compares the underlying date and not the chronology.
|
|
690 |
* This allows dates in different calendar systems to be compared based
|
|
691 |
* on the time-line position.
|
|
692 |
* This is equivalent to using {@code date1.toEpochDay() < date2.toEpochDay()}.
|
|
693 |
* <p>
|
|
694 |
* This default implementation performs the comparison based on the epoch-day.
|
|
695 |
*
|
|
696 |
* @param other the other date to compare to, not null
|
|
697 |
* @return true if this is before the specified date
|
|
698 |
*/
|
16852
|
699 |
default boolean isBefore(ChronoLocalDate<?> other) {
|
15658
|
700 |
return this.toEpochDay() < other.toEpochDay();
|
|
701 |
}
|
|
702 |
|
|
703 |
/**
|
|
704 |
* Checks if this date is equal to the specified date ignoring the chronology.
|
|
705 |
* <p>
|
|
706 |
* This method differs from the comparison in {@link #compareTo} in that it
|
|
707 |
* only compares the underlying date and not the chronology.
|
|
708 |
* This allows dates in different calendar systems to be compared based
|
|
709 |
* on the time-line position.
|
|
710 |
* This is equivalent to using {@code date1.toEpochDay() == date2.toEpochDay()}.
|
|
711 |
* <p>
|
|
712 |
* This default implementation performs the comparison based on the epoch-day.
|
|
713 |
*
|
|
714 |
* @param other the other date to compare to, not null
|
|
715 |
* @return true if the underlying date is equal to the specified date
|
|
716 |
*/
|
16852
|
717 |
default boolean isEqual(ChronoLocalDate<?> other) {
|
15658
|
718 |
return this.toEpochDay() == other.toEpochDay();
|
|
719 |
}
|
|
720 |
|
|
721 |
//-----------------------------------------------------------------------
|
|
722 |
/**
|
|
723 |
* Checks if this date is equal to another date, including the chronology.
|
|
724 |
* <p>
|
|
725 |
* Compares this date with another ensuring that the date and chronology are the same.
|
|
726 |
* <p>
|
|
727 |
* To compare the dates of two {@code TemporalAccessor} instances, including dates
|
|
728 |
* in two different chronologies, use {@link ChronoField#EPOCH_DAY} as a comparator.
|
|
729 |
*
|
|
730 |
* @param obj the object to check, null returns false
|
|
731 |
* @return true if this is equal to the other date
|
|
732 |
*/
|
|
733 |
@Override
|
|
734 |
boolean equals(Object obj);
|
|
735 |
|
|
736 |
/**
|
|
737 |
* A hash code for this date.
|
|
738 |
*
|
|
739 |
* @return a suitable hash code
|
|
740 |
*/
|
|
741 |
@Override
|
|
742 |
int hashCode();
|
|
743 |
|
|
744 |
//-----------------------------------------------------------------------
|
|
745 |
/**
|
|
746 |
* Outputs this date as a {@code String}.
|
|
747 |
* <p>
|
16852
|
748 |
* The output will include the full local date.
|
15658
|
749 |
*
|
|
750 |
* @return the formatted date, not null
|
|
751 |
*/
|
|
752 |
@Override
|
|
753 |
String toString();
|
|
754 |
|
|
755 |
}
|