1 /*
2 * Copyright (c) 2012, 2016, 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) 2008-2012, 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.format;
63
64 import static java.time.temporal.ChronoField.DAY_OF_MONTH;
65 import static java.time.temporal.ChronoField.HOUR_OF_DAY;
66 import static java.time.temporal.ChronoField.INSTANT_SECONDS;
67 import static java.time.temporal.ChronoField.MINUTE_OF_HOUR;
68 import static java.time.temporal.ChronoField.MONTH_OF_YEAR;
69 import static java.time.temporal.ChronoField.NANO_OF_SECOND;
70 import static java.time.temporal.ChronoField.OFFSET_SECONDS;
71 import static java.time.temporal.ChronoField.SECOND_OF_MINUTE;
72 import static java.time.temporal.ChronoField.YEAR;
73 import static java.time.temporal.ChronoField.ERA;
74
75 import java.lang.ref.SoftReference;
76 import java.math.BigDecimal;
77 import java.math.BigInteger;
78 import java.math.RoundingMode;
79 import java.text.ParsePosition;
80 import java.time.DateTimeException;
81 import java.time.Instant;
82 import java.time.LocalDate;
83 import java.time.LocalDateTime;
84 import java.time.ZoneId;
85 import java.time.ZoneOffset;
86 import java.time.chrono.ChronoLocalDate;
87 import java.time.chrono.Chronology;
88 import java.time.chrono.Era;
89 import java.time.chrono.IsoChronology;
90 import java.time.format.DateTimeTextProvider.LocaleStore;
91 import java.time.temporal.ChronoField;
92 import java.time.temporal.IsoFields;
93 import java.time.temporal.JulianFields;
94 import java.time.temporal.TemporalAccessor;
95 import java.time.temporal.TemporalField;
96 import java.time.temporal.TemporalQueries;
97 import java.time.temporal.TemporalQuery;
98 import java.time.temporal.ValueRange;
99 import java.time.temporal.WeekFields;
100 import java.time.zone.ZoneRulesProvider;
101 import java.util.AbstractMap.SimpleImmutableEntry;
102 import java.util.ArrayList;
103 import java.util.Arrays;
104 import java.util.Collections;
105 import java.util.Comparator;
106 import java.util.HashMap;
107 import java.util.HashSet;
108 import java.util.Iterator;
109 import java.util.LinkedHashMap;
110 import java.util.List;
111 import java.util.Locale;
112 import java.util.Map;
113 import java.util.Map.Entry;
114 import java.util.Objects;
115 import java.util.Set;
116 import java.util.TimeZone;
117 import java.util.concurrent.ConcurrentHashMap;
118 import java.util.concurrent.ConcurrentMap;
119
120 import sun.util.locale.provider.LocaleProviderAdapter;
121 import sun.util.locale.provider.LocaleResources;
122 import sun.util.locale.provider.TimeZoneNameUtility;
123
124 /**
125 * Builder to create date-time formatters.
126 * <p>
127 * This allows a {@code DateTimeFormatter} to be created.
128 * All date-time formatters are created ultimately using this builder.
129 * <p>
130 * The basic elements of date-time can all be added:
131 * <ul>
132 * <li>Value - a numeric value</li>
133 * <li>Fraction - a fractional value including the decimal place. Always use this when
134 * outputting fractions to ensure that the fraction is parsed correctly</li>
135 * <li>Text - the textual equivalent for the value</li>
136 * <li>OffsetId/Offset - the {@linkplain ZoneOffset zone offset}</li>
137 * <li>ZoneId - the {@linkplain ZoneId time-zone} id</li>
138 * <li>ZoneText - the name of the time-zone</li>
139 * <li>ChronologyId - the {@linkplain Chronology chronology} id</li>
140 * <li>ChronologyText - the name of the chronology</li>
141 * <li>Literal - a text literal</li>
142 * <li>Nested and Optional - formats can be nested or made optional</li>
143 * </ul>
144 * In addition, any of the elements may be decorated by padding, either with spaces or any other character.
145 * <p>
146 * Finally, a shorthand pattern, mostly compatible with {@code java.text.SimpleDateFormat SimpleDateFormat}
147 * can be used, see {@link #appendPattern(String)}.
148 * In practice, this simply parses the pattern and calls other methods on the builder.
149 *
150 * @implSpec
151 * This class is a mutable builder intended for use from a single thread.
152 *
153 * @since 1.8
154 */
155 public final class DateTimeFormatterBuilder {
156
157 /**
158 * Query for a time-zone that is region-only.
159 */
160 private static final TemporalQuery<ZoneId> QUERY_REGION_ONLY = (temporal) -> {
161 ZoneId zone = temporal.query(TemporalQueries.zoneId());
162 return (zone != null && zone instanceof ZoneOffset == false ? zone : null);
163 };
164
165 /**
166 * The currently active builder, used by the outermost builder.
167 */
168 private DateTimeFormatterBuilder active = this;
169 /**
170 * The parent builder, null for the outermost builder.
171 */
172 private final DateTimeFormatterBuilder parent;
173 /**
174 * The list of printers that will be used.
175 */
176 private final List<DateTimePrinterParser> printerParsers = new ArrayList<>();
177 /**
178 * Whether this builder produces an optional formatter.
179 */
180 private final boolean optional;
181 /**
182 * The width to pad the next field to.
183 */
184 private int padNextWidth;
185 /**
186 * The character to pad the next field with.
187 */
188 private char padNextChar;
189 /**
190 * The index of the last variable width value parser.
191 */
192 private int valueParserIndex = -1;
193
194 /**
195 * Gets the formatting pattern for date and time styles for a locale and chronology.
196 * The locale and chronology are used to lookup the locale specific format
197 * for the requested dateStyle and/or timeStyle.
198 *
199 * @param dateStyle the FormatStyle for the date, null for time-only pattern
200 * @param timeStyle the FormatStyle for the time, null for date-only pattern
201 * @param chrono the Chronology, non-null
202 * @param locale the locale, non-null
203 * @return the locale and Chronology specific formatting pattern
204 * @throws IllegalArgumentException if both dateStyle and timeStyle are null
205 */
206 public static String getLocalizedDateTimePattern(FormatStyle dateStyle, FormatStyle timeStyle,
207 Chronology chrono, Locale locale) {
208 Objects.requireNonNull(locale, "locale");
209 Objects.requireNonNull(chrono, "chrono");
210 if (dateStyle == null && timeStyle == null) {
211 throw new IllegalArgumentException("Either dateStyle or timeStyle must be non-null");
212 }
213 LocaleResources lr = LocaleProviderAdapter.getResourceBundleBased().getLocaleResources(locale);
214 String pattern = lr.getJavaTimeDateTimePattern(
215 convertStyle(timeStyle), convertStyle(dateStyle), chrono.getCalendarType());
216 return pattern;
217 }
218
219 /**
220 * Converts the given FormatStyle to the java.text.DateFormat style.
221 *
222 * @param style the FormatStyle style
223 * @return the int style, or -1 if style is null, indicating un-required
224 */
225 private static int convertStyle(FormatStyle style) {
226 if (style == null) {
227 return -1;
228 }
229 return style.ordinal(); // indices happen to align
230 }
231
232 /**
233 * Constructs a new instance of the builder.
234 */
235 public DateTimeFormatterBuilder() {
236 super();
237 parent = null;
238 optional = false;
239 }
240
241 /**
242 * Constructs a new instance of the builder.
243 *
244 * @param parent the parent builder, not null
245 * @param optional whether the formatter is optional, not null
246 */
247 private DateTimeFormatterBuilder(DateTimeFormatterBuilder parent, boolean optional) {
248 super();
249 this.parent = parent;
250 this.optional = optional;
251 }
252
253 //-----------------------------------------------------------------------
254 /**
255 * Changes the parse style to be case sensitive for the remainder of the formatter.
256 * <p>
257 * Parsing can be case sensitive or insensitive - by default it is case sensitive.
258 * This method allows the case sensitivity setting of parsing to be changed.
259 * <p>
260 * Calling this method changes the state of the builder such that all
261 * subsequent builder method calls will parse text in case sensitive mode.
262 * See {@link #parseCaseInsensitive} for the opposite setting.
263 * The parse case sensitive/insensitive methods may be called at any point
264 * in the builder, thus the parser can swap between case parsing modes
265 * multiple times during the parse.
266 * <p>
267 * Since the default is case sensitive, this method should only be used after
268 * a previous call to {@code #parseCaseInsensitive}.
269 *
270 * @return this, for chaining, not null
271 */
272 public DateTimeFormatterBuilder parseCaseSensitive() {
273 appendInternal(SettingsParser.SENSITIVE);
274 return this;
275 }
276
277 /**
278 * Changes the parse style to be case insensitive for the remainder of the formatter.
279 * <p>
280 * Parsing can be case sensitive or insensitive - by default it is case sensitive.
281 * This method allows the case sensitivity setting of parsing to be changed.
282 * <p>
283 * Calling this method changes the state of the builder such that all
284 * subsequent builder method calls will parse text in case insensitive mode.
285 * See {@link #parseCaseSensitive()} for the opposite setting.
286 * The parse case sensitive/insensitive methods may be called at any point
287 * in the builder, thus the parser can swap between case parsing modes
288 * multiple times during the parse.
289 *
290 * @return this, for chaining, not null
291 */
292 public DateTimeFormatterBuilder parseCaseInsensitive() {
293 appendInternal(SettingsParser.INSENSITIVE);
294 return this;
295 }
296
297 //-----------------------------------------------------------------------
298 /**
299 * Changes the parse style to be strict for the remainder of the formatter.
300 * <p>
301 * Parsing can be strict or lenient - by default its strict.
302 * This controls the degree of flexibility in matching the text and sign styles.
303 * <p>
304 * When used, this method changes the parsing to be strict from this point onwards.
305 * As strict is the default, this is normally only needed after calling {@link #parseLenient()}.
306 * The change will remain in force until the end of the formatter that is eventually
307 * constructed or until {@code parseLenient} is called.
308 *
309 * @return this, for chaining, not null
310 */
311 public DateTimeFormatterBuilder parseStrict() {
312 appendInternal(SettingsParser.STRICT);
313 return this;
314 }
315
316 /**
317 * Changes the parse style to be lenient for the remainder of the formatter.
318 * Note that case sensitivity is set separately to this method.
319 * <p>
320 * Parsing can be strict or lenient - by default its strict.
321 * This controls the degree of flexibility in matching the text and sign styles.
322 * Applications calling this method should typically also call {@link #parseCaseInsensitive()}.
323 * <p>
324 * When used, this method changes the parsing to be lenient from this point onwards.
325 * The change will remain in force until the end of the formatter that is eventually
326 * constructed or until {@code parseStrict} is called.
327 *
328 * @return this, for chaining, not null
329 */
330 public DateTimeFormatterBuilder parseLenient() {
331 appendInternal(SettingsParser.LENIENT);
332 return this;
333 }
334
335 //-----------------------------------------------------------------------
336 /**
337 * Appends a default value for a field to the formatter for use in parsing.
338 * <p>
339 * This appends an instruction to the builder to inject a default value
340 * into the parsed result. This is especially useful in conjunction with
341 * optional parts of the formatter.
342 * <p>
343 * For example, consider a formatter that parses the year, followed by
344 * an optional month, with a further optional day-of-month. Using such a
345 * formatter would require the calling code to check whether a full date,
346 * year-month or just a year had been parsed. This method can be used to
347 * default the month and day-of-month to a sensible value, such as the
348 * first of the month, allowing the calling code to always get a date.
349 * <p>
350 * During formatting, this method has no effect.
351 * <p>
352 * During parsing, the current state of the parse is inspected.
353 * If the specified field has no associated value, because it has not been
354 * parsed successfully at that point, then the specified value is injected
355 * into the parse result. Injection is immediate, thus the field-value pair
356 * will be visible to any subsequent elements in the formatter.
357 * As such, this method is normally called at the end of the builder.
358 *
359 * @param field the field to default the value of, not null
360 * @param value the value to default the field to
361 * @return this, for chaining, not null
362 */
363 public DateTimeFormatterBuilder parseDefaulting(TemporalField field, long value) {
364 Objects.requireNonNull(field, "field");
365 appendInternal(new DefaultValueParser(field, value));
366 return this;
367 }
368
369 //-----------------------------------------------------------------------
370 /**
371 * Appends the value of a date-time field to the formatter using a normal
372 * output style.
373 * <p>
374 * The value of the field will be output during a format.
375 * If the value cannot be obtained then an exception will be thrown.
376 * <p>
377 * The value will be printed as per the normal format of an integer value.
378 * Only negative numbers will be signed. No padding will be added.
379 * <p>
380 * The parser for a variable width value such as this normally behaves greedily,
381 * requiring one digit, but accepting as many digits as possible.
382 * This behavior can be affected by 'adjacent value parsing'.
383 * See {@link #appendValue(java.time.temporal.TemporalField, int)} for full details.
384 *
385 * @param field the field to append, not null
386 * @return this, for chaining, not null
387 */
388 public DateTimeFormatterBuilder appendValue(TemporalField field) {
389 Objects.requireNonNull(field, "field");
390 appendValue(new NumberPrinterParser(field, 1, 19, SignStyle.NORMAL));
391 return this;
392 }
393
394 /**
395 * Appends the value of a date-time field to the formatter using a fixed
396 * width, zero-padded approach.
397 * <p>
398 * The value of the field will be output during a format.
399 * If the value cannot be obtained then an exception will be thrown.
400 * <p>
401 * The value will be zero-padded on the left. If the size of the value
402 * means that it cannot be printed within the width then an exception is thrown.
403 * If the value of the field is negative then an exception is thrown during formatting.
404 * <p>
405 * This method supports a special technique of parsing known as 'adjacent value parsing'.
406 * This technique solves the problem where a value, variable or fixed width, is followed by one or more
407 * fixed length values. The standard parser is greedy, and thus it would normally
408 * steal the digits that are needed by the fixed width value parsers that follow the
409 * variable width one.
410 * <p>
411 * No action is required to initiate 'adjacent value parsing'.
412 * When a call to {@code appendValue} is made, the builder
413 * enters adjacent value parsing setup mode. If the immediately subsequent method
414 * call or calls on the same builder are for a fixed width value, then the parser will reserve
415 * space so that the fixed width values can be parsed.
416 * <p>
417 * For example, consider {@code builder.appendValue(YEAR).appendValue(MONTH_OF_YEAR, 2);}
418 * The year is a variable width parse of between 1 and 19 digits.
419 * The month is a fixed width parse of 2 digits.
420 * Because these were appended to the same builder immediately after one another,
421 * the year parser will reserve two digits for the month to parse.
422 * Thus, the text '201106' will correctly parse to a year of 2011 and a month of 6.
423 * Without adjacent value parsing, the year would greedily parse all six digits and leave
424 * nothing for the month.
425 * <p>
426 * Adjacent value parsing applies to each set of fixed width not-negative values in the parser
427 * that immediately follow any kind of value, variable or fixed width.
428 * Calling any other append method will end the setup of adjacent value parsing.
429 * Thus, in the unlikely event that you need to avoid adjacent value parsing behavior,
430 * simply add the {@code appendValue} to another {@code DateTimeFormatterBuilder}
431 * and add that to this builder.
432 * <p>
433 * If adjacent parsing is active, then parsing must match exactly the specified
434 * number of digits in both strict and lenient modes.
435 * In addition, no positive or negative sign is permitted.
436 *
437 * @param field the field to append, not null
438 * @param width the width of the printed field, from 1 to 19
439 * @return this, for chaining, not null
440 * @throws IllegalArgumentException if the width is invalid
441 */
442 public DateTimeFormatterBuilder appendValue(TemporalField field, int width) {
443 Objects.requireNonNull(field, "field");
444 if (width < 1 || width > 19) {
445 throw new IllegalArgumentException("The width must be from 1 to 19 inclusive but was " + width);
446 }
447 NumberPrinterParser pp = new NumberPrinterParser(field, width, width, SignStyle.NOT_NEGATIVE);
448 appendValue(pp);
449 return this;
450 }
451
452 /**
453 * Appends the value of a date-time field to the formatter providing full
454 * control over formatting.
455 * <p>
456 * The value of the field will be output during a format.
457 * If the value cannot be obtained then an exception will be thrown.
458 * <p>
459 * This method provides full control of the numeric formatting, including
460 * zero-padding and the positive/negative sign.
461 * <p>
462 * The parser for a variable width value such as this normally behaves greedily,
463 * accepting as many digits as possible.
464 * This behavior can be affected by 'adjacent value parsing'.
465 * See {@link #appendValue(java.time.temporal.TemporalField, int)} for full details.
466 * <p>
467 * In strict parsing mode, the minimum number of parsed digits is {@code minWidth}
468 * and the maximum is {@code maxWidth}.
469 * In lenient parsing mode, the minimum number of parsed digits is one
470 * and the maximum is 19 (except as limited by adjacent value parsing).
471 * <p>
472 * If this method is invoked with equal minimum and maximum widths and a sign style of
473 * {@code NOT_NEGATIVE} then it delegates to {@code appendValue(TemporalField,int)}.
474 * In this scenario, the formatting and parsing behavior described there occur.
475 *
476 * @param field the field to append, not null
477 * @param minWidth the minimum field width of the printed field, from 1 to 19
478 * @param maxWidth the maximum field width of the printed field, from 1 to 19
479 * @param signStyle the positive/negative output style, not null
480 * @return this, for chaining, not null
481 * @throws IllegalArgumentException if the widths are invalid
482 */
483 public DateTimeFormatterBuilder appendValue(
484 TemporalField field, int minWidth, int maxWidth, SignStyle signStyle) {
485 if (minWidth == maxWidth && signStyle == SignStyle.NOT_NEGATIVE) {
486 return appendValue(field, maxWidth);
487 }
488 Objects.requireNonNull(field, "field");
489 Objects.requireNonNull(signStyle, "signStyle");
490 if (minWidth < 1 || minWidth > 19) {
491 throw new IllegalArgumentException("The minimum width must be from 1 to 19 inclusive but was " + minWidth);
492 }
493 if (maxWidth < 1 || maxWidth > 19) {
494 throw new IllegalArgumentException("The maximum width must be from 1 to 19 inclusive but was " + maxWidth);
495 }
496 if (maxWidth < minWidth) {
497 throw new IllegalArgumentException("The maximum width must exceed or equal the minimum width but " +
498 maxWidth + " < " + minWidth);
499 }
500 NumberPrinterParser pp = new NumberPrinterParser(field, minWidth, maxWidth, signStyle);
501 appendValue(pp);
502 return this;
503 }
504
505 //-----------------------------------------------------------------------
506 /**
507 * Appends the reduced value of a date-time field to the formatter.
508 * <p>
509 * Since fields such as year vary by chronology, it is recommended to use the
510 * {@link #appendValueReduced(TemporalField, int, int, ChronoLocalDate)} date}
511 * variant of this method in most cases. This variant is suitable for
512 * simple fields or working with only the ISO chronology.
513 * <p>
514 * For formatting, the {@code width} and {@code maxWidth} are used to
515 * determine the number of characters to format.
516 * If they are equal then the format is fixed width.
517 * If the value of the field is within the range of the {@code baseValue} using
518 * {@code width} characters then the reduced value is formatted otherwise the value is
519 * truncated to fit {@code maxWidth}.
520 * The rightmost characters are output to match the width, left padding with zero.
521 * <p>
522 * For strict parsing, the number of characters allowed by {@code width} to {@code maxWidth} are parsed.
523 * For lenient parsing, the number of characters must be at least 1 and less than 10.
524 * If the number of digits parsed is equal to {@code width} and the value is positive,
525 * the value of the field is computed to be the first number greater than
526 * or equal to the {@code baseValue} with the same least significant characters,
527 * otherwise the value parsed is the field value.
528 * This allows a reduced value to be entered for values in range of the baseValue
529 * and width and absolute values can be entered for values outside the range.
530 * <p>
531 * For example, a base value of {@code 1980} and a width of {@code 2} will have
532 * valid values from {@code 1980} to {@code 2079}.
533 * During parsing, the text {@code "12"} will result in the value {@code 2012} as that
534 * is the value within the range where the last two characters are "12".
535 * By contrast, parsing the text {@code "1915"} will result in the value {@code 1915}.
536 *
537 * @param field the field to append, not null
538 * @param width the field width of the printed and parsed field, from 1 to 10
539 * @param maxWidth the maximum field width of the printed field, from 1 to 10
540 * @param baseValue the base value of the range of valid values
541 * @return this, for chaining, not null
542 * @throws IllegalArgumentException if the width or base value is invalid
543 */
544 public DateTimeFormatterBuilder appendValueReduced(TemporalField field,
545 int width, int maxWidth, int baseValue) {
546 Objects.requireNonNull(field, "field");
547 ReducedPrinterParser pp = new ReducedPrinterParser(field, width, maxWidth, baseValue, null);
548 appendValue(pp);
549 return this;
550 }
551
552 /**
553 * Appends the reduced value of a date-time field to the formatter.
554 * <p>
555 * This is typically used for formatting and parsing a two digit year.
556 * <p>
557 * The base date is used to calculate the full value during parsing.
558 * For example, if the base date is 1950-01-01 then parsed values for
559 * a two digit year parse will be in the range 1950-01-01 to 2049-12-31.
560 * Only the year would be extracted from the date, thus a base date of
561 * 1950-08-25 would also parse to the range 1950-01-01 to 2049-12-31.
562 * This behavior is necessary to support fields such as week-based-year
563 * or other calendar systems where the parsed value does not align with
564 * standard ISO years.
565 * <p>
566 * The exact behavior is as follows. Parse the full set of fields and
567 * determine the effective chronology using the last chronology if
568 * it appears more than once. Then convert the base date to the
569 * effective chronology. Then extract the specified field from the
570 * chronology-specific base date and use it to determine the
571 * {@code baseValue} used below.
572 * <p>
573 * For formatting, the {@code width} and {@code maxWidth} are used to
574 * determine the number of characters to format.
575 * If they are equal then the format is fixed width.
576 * If the value of the field is within the range of the {@code baseValue} using
577 * {@code width} characters then the reduced value is formatted otherwise the value is
578 * truncated to fit {@code maxWidth}.
579 * The rightmost characters are output to match the width, left padding with zero.
580 * <p>
581 * For strict parsing, the number of characters allowed by {@code width} to {@code maxWidth} are parsed.
582 * For lenient parsing, the number of characters must be at least 1 and less than 10.
583 * If the number of digits parsed is equal to {@code width} and the value is positive,
584 * the value of the field is computed to be the first number greater than
585 * or equal to the {@code baseValue} with the same least significant characters,
586 * otherwise the value parsed is the field value.
587 * This allows a reduced value to be entered for values in range of the baseValue
588 * and width and absolute values can be entered for values outside the range.
589 * <p>
590 * For example, a base value of {@code 1980} and a width of {@code 2} will have
591 * valid values from {@code 1980} to {@code 2079}.
592 * During parsing, the text {@code "12"} will result in the value {@code 2012} as that
593 * is the value within the range where the last two characters are "12".
594 * By contrast, parsing the text {@code "1915"} will result in the value {@code 1915}.
595 *
596 * @param field the field to append, not null
597 * @param width the field width of the printed and parsed field, from 1 to 10
598 * @param maxWidth the maximum field width of the printed field, from 1 to 10
599 * @param baseDate the base date used to calculate the base value for the range
600 * of valid values in the parsed chronology, not null
601 * @return this, for chaining, not null
602 * @throws IllegalArgumentException if the width or base value is invalid
603 */
604 public DateTimeFormatterBuilder appendValueReduced(
605 TemporalField field, int width, int maxWidth, ChronoLocalDate baseDate) {
606 Objects.requireNonNull(field, "field");
607 Objects.requireNonNull(baseDate, "baseDate");
608 ReducedPrinterParser pp = new ReducedPrinterParser(field, width, maxWidth, 0, baseDate);
609 appendValue(pp);
610 return this;
611 }
612
613 /**
614 * Appends a fixed or variable width printer-parser handling adjacent value mode.
615 * If a PrinterParser is not active then the new PrinterParser becomes
616 * the active PrinterParser.
617 * Otherwise, the active PrinterParser is modified depending on the new PrinterParser.
618 * If the new PrinterParser is fixed width and has sign style {@code NOT_NEGATIVE}
619 * then its width is added to the active PP and
620 * the new PrinterParser is forced to be fixed width.
621 * If the new PrinterParser is variable width, the active PrinterParser is changed
622 * to be fixed width and the new PrinterParser becomes the active PP.
623 *
624 * @param pp the printer-parser, not null
625 * @return this, for chaining, not null
626 */
627 private DateTimeFormatterBuilder appendValue(NumberPrinterParser pp) {
628 if (active.valueParserIndex >= 0) {
629 final int activeValueParser = active.valueParserIndex;
630
631 // adjacent parsing mode, update setting in previous parsers
632 NumberPrinterParser basePP = (NumberPrinterParser) active.printerParsers.get(activeValueParser);
633 if (pp.minWidth == pp.maxWidth && pp.signStyle == SignStyle.NOT_NEGATIVE) {
634 // Append the width to the subsequentWidth of the active parser
635 basePP = basePP.withSubsequentWidth(pp.maxWidth);
636 // Append the new parser as a fixed width
637 appendInternal(pp.withFixedWidth());
638 // Retain the previous active parser
639 active.valueParserIndex = activeValueParser;
640 } else {
641 // Modify the active parser to be fixed width
642 basePP = basePP.withFixedWidth();
643 // The new parser becomes the mew active parser
644 active.valueParserIndex = appendInternal(pp);
645 }
646 // Replace the modified parser with the updated one
647 active.printerParsers.set(activeValueParser, basePP);
648 } else {
649 // The new Parser becomes the active parser
650 active.valueParserIndex = appendInternal(pp);
651 }
652 return this;
653 }
654
655 //-----------------------------------------------------------------------
656 /**
657 * Appends the fractional value of a date-time field to the formatter.
658 * <p>
659 * The fractional value of the field will be output including the
660 * preceding decimal point. The preceding value is not output.
661 * For example, the second-of-minute value of 15 would be output as {@code .25}.
662 * <p>
663 * The width of the printed fraction can be controlled. Setting the
664 * minimum width to zero will cause no output to be generated.
665 * The printed fraction will have the minimum width necessary between
666 * the minimum and maximum widths - trailing zeroes are omitted.
667 * No rounding occurs due to the maximum width - digits are simply dropped.
668 * <p>
669 * When parsing in strict mode, the number of parsed digits must be between
670 * the minimum and maximum width. When parsing in lenient mode, the minimum
671 * width is considered to be zero and the maximum is nine.
672 * <p>
673 * If the value cannot be obtained then an exception will be thrown.
674 * If the value is negative an exception will be thrown.
675 * If the field does not have a fixed set of valid values then an
676 * exception will be thrown.
677 * If the field value in the date-time to be printed is invalid it
678 * cannot be printed and an exception will be thrown.
679 *
680 * @param field the field to append, not null
681 * @param minWidth the minimum width of the field excluding the decimal point, from 0 to 9
682 * @param maxWidth the maximum width of the field excluding the decimal point, from 1 to 9
683 * @param decimalPoint whether to output the localized decimal point symbol
684 * @return this, for chaining, not null
685 * @throws IllegalArgumentException if the field has a variable set of valid values or
686 * either width is invalid
687 */
688 public DateTimeFormatterBuilder appendFraction(
689 TemporalField field, int minWidth, int maxWidth, boolean decimalPoint) {
690 appendInternal(new FractionPrinterParser(field, minWidth, maxWidth, decimalPoint));
691 return this;
692 }
693
694 //-----------------------------------------------------------------------
695 /**
696 * Appends the text of a date-time field to the formatter using the full
697 * text style.
698 * <p>
699 * The text of the field will be output during a format.
700 * The value must be within the valid range of the field.
701 * If the value cannot be obtained then an exception will be thrown.
702 * If the field has no textual representation, then the numeric value will be used.
703 * <p>
704 * The value will be printed as per the normal format of an integer value.
705 * Only negative numbers will be signed. No padding will be added.
706 *
707 * @param field the field to append, not null
708 * @return this, for chaining, not null
709 */
710 public DateTimeFormatterBuilder appendText(TemporalField field) {
711 return appendText(field, TextStyle.FULL);
712 }
713
714 /**
715 * Appends the text of a date-time field to the formatter.
716 * <p>
717 * The text of the field will be output during a format.
718 * The value must be within the valid range of the field.
719 * If the value cannot be obtained then an exception will be thrown.
720 * If the field has no textual representation, then the numeric value will be used.
721 * <p>
722 * The value will be printed as per the normal format of an integer value.
723 * Only negative numbers will be signed. No padding will be added.
724 *
725 * @param field the field to append, not null
726 * @param textStyle the text style to use, not null
727 * @return this, for chaining, not null
728 */
729 public DateTimeFormatterBuilder appendText(TemporalField field, TextStyle textStyle) {
730 Objects.requireNonNull(field, "field");
731 Objects.requireNonNull(textStyle, "textStyle");
732 appendInternal(new TextPrinterParser(field, textStyle, DateTimeTextProvider.getInstance()));
733 return this;
734 }
735
736 /**
737 * Appends the text of a date-time field to the formatter using the specified
738 * map to supply the text.
739 * <p>
740 * The standard text outputting methods use the localized text in the JDK.
741 * This method allows that text to be specified directly.
742 * The supplied map is not validated by the builder to ensure that formatting or
743 * parsing is possible, thus an invalid map may throw an error during later use.
744 * <p>
745 * Supplying the map of text provides considerable flexibility in formatting and parsing.
746 * For example, a legacy application might require or supply the months of the
747 * year as "JNY", "FBY", "MCH" etc. These do not match the standard set of text
748 * for localized month names. Using this method, a map can be created which
749 * defines the connection between each value and the text:
750 * <pre>
751 * Map<Long, String> map = new HashMap<>();
752 * map.put(1L, "JNY");
753 * map.put(2L, "FBY");
754 * map.put(3L, "MCH");
755 * ...
756 * builder.appendText(MONTH_OF_YEAR, map);
757 * </pre>
758 * <p>
759 * Other uses might be to output the value with a suffix, such as "1st", "2nd", "3rd",
760 * or as Roman numerals "I", "II", "III", "IV".
761 * <p>
762 * During formatting, the value is obtained and checked that it is in the valid range.
763 * If text is not available for the value then it is output as a number.
764 * During parsing, the parser will match against the map of text and numeric values.
765 *
766 * @param field the field to append, not null
767 * @param textLookup the map from the value to the text
768 * @return this, for chaining, not null
769 */
770 public DateTimeFormatterBuilder appendText(TemporalField field, Map<Long, String> textLookup) {
771 Objects.requireNonNull(field, "field");
772 Objects.requireNonNull(textLookup, "textLookup");
773 Map<Long, String> copy = new LinkedHashMap<>(textLookup);
774 Map<TextStyle, Map<Long, String>> map = Collections.singletonMap(TextStyle.FULL, copy);
775 final LocaleStore store = new LocaleStore(map);
776 DateTimeTextProvider provider = new DateTimeTextProvider() {
777 @Override
778 public String getText(TemporalField field, long value, TextStyle style, Locale locale) {
779 return store.getText(value, style);
780 }
781 @Override
782 public Iterator<Entry<String, Long>> getTextIterator(TemporalField field, TextStyle style, Locale locale) {
783 return store.getTextIterator(style);
784 }
785 };
786 appendInternal(new TextPrinterParser(field, TextStyle.FULL, provider));
787 return this;
788 }
789
790 //-----------------------------------------------------------------------
791 /**
792 * Appends an instant using ISO-8601 to the formatter, formatting fractional
793 * digits in groups of three.
794 * <p>
795 * Instants have a fixed output format.
796 * They are converted to a date-time with a zone-offset of UTC and formatted
797 * using the standard ISO-8601 format.
798 * With this method, formatting nano-of-second outputs zero, three, six
799 * or nine digits as necessary.
800 * The localized decimal style is not used.
801 * <p>
802 * The instant is obtained using {@link ChronoField#INSTANT_SECONDS INSTANT_SECONDS}
803 * and optionally (@code NANO_OF_SECOND). The value of {@code INSTANT_SECONDS}
804 * may be outside the maximum range of {@code LocalDateTime}.
805 * <p>
806 * The {@linkplain ResolverStyle resolver style} has no effect on instant parsing.
807 * The end-of-day time of '24:00' is handled as midnight at the start of the following day.
808 * The leap-second time of '23:59:59' is handled to some degree, see
809 * {@link DateTimeFormatter#parsedLeapSecond()} for full details.
810 * <p>
811 * An alternative to this method is to format/parse the instant as a single
812 * epoch-seconds value. That is achieved using {@code appendValue(INSTANT_SECONDS)}.
813 *
814 * @return this, for chaining, not null
815 */
816 public DateTimeFormatterBuilder appendInstant() {
817 appendInternal(new InstantPrinterParser(-2));
818 return this;
819 }
820
821 /**
822 * Appends an instant using ISO-8601 to the formatter with control over
823 * the number of fractional digits.
824 * <p>
825 * Instants have a fixed output format, although this method provides some
826 * control over the fractional digits. They are converted to a date-time
827 * with a zone-offset of UTC and printed using the standard ISO-8601 format.
828 * The localized decimal style is not used.
829 * <p>
830 * The {@code fractionalDigits} parameter allows the output of the fractional
831 * second to be controlled. Specifying zero will cause no fractional digits
832 * to be output. From 1 to 9 will output an increasing number of digits, using
833 * zero right-padding if necessary. The special value -1 is used to output as
834 * many digits as necessary to avoid any trailing zeroes.
835 * <p>
836 * When parsing in strict mode, the number of parsed digits must match the
837 * fractional digits. When parsing in lenient mode, any number of fractional
838 * digits from zero to nine are accepted.
839 * <p>
840 * The instant is obtained using {@link ChronoField#INSTANT_SECONDS INSTANT_SECONDS}
841 * and optionally (@code NANO_OF_SECOND). The value of {@code INSTANT_SECONDS}
842 * may be outside the maximum range of {@code LocalDateTime}.
843 * <p>
844 * The {@linkplain ResolverStyle resolver style} has no effect on instant parsing.
845 * The end-of-day time of '24:00' is handled as midnight at the start of the following day.
846 * The leap-second time of '23:59:60' is handled to some degree, see
847 * {@link DateTimeFormatter#parsedLeapSecond()} for full details.
848 * <p>
849 * An alternative to this method is to format/parse the instant as a single
850 * epoch-seconds value. That is achieved using {@code appendValue(INSTANT_SECONDS)}.
851 *
852 * @param fractionalDigits the number of fractional second digits to format with,
853 * from 0 to 9, or -1 to use as many digits as necessary
854 * @return this, for chaining, not null
855 * @throws IllegalArgumentException if the number of fractional digits is invalid
856 */
857 public DateTimeFormatterBuilder appendInstant(int fractionalDigits) {
858 if (fractionalDigits < -1 || fractionalDigits > 9) {
859 throw new IllegalArgumentException("The fractional digits must be from -1 to 9 inclusive but was " + fractionalDigits);
860 }
861 appendInternal(new InstantPrinterParser(fractionalDigits));
862 return this;
863 }
864
865 //-----------------------------------------------------------------------
866 /**
867 * Appends the zone offset, such as '+01:00', to the formatter.
868 * <p>
869 * This appends an instruction to format/parse the offset ID to the builder.
870 * This is equivalent to calling {@code appendOffset("+HH:mm:ss", "Z")}.
871 * See {@link #appendOffset(String, String)} for details on formatting
872 * and parsing.
873 *
874 * @return this, for chaining, not null
875 */
876 public DateTimeFormatterBuilder appendOffsetId() {
877 appendInternal(OffsetIdPrinterParser.INSTANCE_ID_Z);
878 return this;
879 }
880
881 /**
882 * Appends the zone offset, such as '+01:00', to the formatter.
883 * <p>
884 * This appends an instruction to format/parse the offset ID to the builder.
885 * <p>
886 * During formatting, the offset is obtained using a mechanism equivalent
887 * to querying the temporal with {@link TemporalQueries#offset()}.
888 * It will be printed using the format defined below.
889 * If the offset cannot be obtained then an exception is thrown unless the
890 * section of the formatter is optional.
891 * <p>
892 * When parsing in strict mode, the input must contain the mandatory
893 * and optional elements are defined by the specified pattern.
894 * If the offset cannot be parsed then an exception is thrown unless
895 * the section of the formatter is optional.
896 * <p>
897 * When parsing in lenient mode, only the hours are mandatory - minutes
898 * and seconds are optional. The colons are required if the specified
899 * pattern contains a colon. If the specified pattern is "+HH", the
900 * presence of colons is determined by whether the character after the
901 * hour digits is a colon or not.
902 * If the offset cannot be parsed then an exception is thrown unless
903 * the section of the formatter is optional.
904 * <p>
905 * The format of the offset is controlled by a pattern which must be one
906 * of the following:
907 * <ul>
908 * <li>{@code +HH} - hour only, ignoring minute and second
909 * <li>{@code +HHmm} - hour, with minute if non-zero, ignoring second, no colon
910 * <li>{@code +HH:mm} - hour, with minute if non-zero, ignoring second, with colon
911 * <li>{@code +HHMM} - hour and minute, ignoring second, no colon
912 * <li>{@code +HH:MM} - hour and minute, ignoring second, with colon
913 * <li>{@code +HHMMss} - hour and minute, with second if non-zero, no colon
914 * <li>{@code +HH:MM:ss} - hour and minute, with second if non-zero, with colon
915 * <li>{@code +HHMMSS} - hour, minute and second, no colon
916 * <li>{@code +HH:MM:SS} - hour, minute and second, with colon
917 * <li>{@code +HHmmss} - hour, with minute if non-zero or with minute and
918 * second if non-zero, no colon
919 * <li>{@code +HH:mm:ss} - hour, with minute if non-zero or with minute and
920 * second if non-zero, with colon
921 * </ul>
922 * The "no offset" text controls what text is printed when the total amount of
923 * the offset fields to be output is zero.
924 * Example values would be 'Z', '+00:00', 'UTC' or 'GMT'.
925 * Three formats are accepted for parsing UTC - the "no offset" text, and the
926 * plus and minus versions of zero defined by the pattern.
927 *
928 * @param pattern the pattern to use, not null
929 * @param noOffsetText the text to use when the offset is zero, not null
930 * @return this, for chaining, not null
931 * @throws IllegalArgumentException if the pattern is invalid
932 */
933 public DateTimeFormatterBuilder appendOffset(String pattern, String noOffsetText) {
934 appendInternal(new OffsetIdPrinterParser(pattern, noOffsetText));
935 return this;
936 }
937
938 /**
939 * Appends the localized zone offset, such as 'GMT+01:00', to the formatter.
940 * <p>
941 * This appends a localized zone offset to the builder, the format of the
942 * localized offset is controlled by the specified {@link FormatStyle style}
943 * to this method:
944 * <ul>
945 * <li>{@link TextStyle#FULL full} - formats with localized offset text, such
946 * as 'GMT, 2-digit hour and minute field, optional second field if non-zero,
947 * and colon.
948 * <li>{@link TextStyle#SHORT short} - formats with localized offset text,
949 * such as 'GMT, hour without leading zero, optional 2-digit minute and
950 * second if non-zero, and colon.
951 * </ul>
952 * <p>
953 * During formatting, the offset is obtained using a mechanism equivalent
954 * to querying the temporal with {@link TemporalQueries#offset()}.
955 * If the offset cannot be obtained then an exception is thrown unless the
956 * section of the formatter is optional.
957 * <p>
958 * During parsing, the offset is parsed using the format defined above.
959 * If the offset cannot be parsed then an exception is thrown unless the
960 * section of the formatter is optional.
961 *
962 * @param style the format style to use, not null
963 * @return this, for chaining, not null
964 * @throws IllegalArgumentException if style is neither {@link TextStyle#FULL
965 * full} nor {@link TextStyle#SHORT short}
966 */
967 public DateTimeFormatterBuilder appendLocalizedOffset(TextStyle style) {
968 Objects.requireNonNull(style, "style");
969 if (style != TextStyle.FULL && style != TextStyle.SHORT) {
970 throw new IllegalArgumentException("Style must be either full or short");
971 }
972 appendInternal(new LocalizedOffsetIdPrinterParser(style));
973 return this;
974 }
975
976 //-----------------------------------------------------------------------
977 /**
978 * Appends the time-zone ID, such as 'Europe/Paris' or '+02:00', to the formatter.
979 * <p>
980 * This appends an instruction to format/parse the zone ID to the builder.
981 * The zone ID is obtained in a strict manner suitable for {@code ZonedDateTime}.
982 * By contrast, {@code OffsetDateTime} does not have a zone ID suitable
983 * for use with this method, see {@link #appendZoneOrOffsetId()}.
984 * <p>
985 * During formatting, the zone is obtained using a mechanism equivalent
986 * to querying the temporal with {@link TemporalQueries#zoneId()}.
987 * It will be printed using the result of {@link ZoneId#getId()}.
988 * If the zone cannot be obtained then an exception is thrown unless the
989 * section of the formatter is optional.
990 * <p>
991 * During parsing, the text must match a known zone or offset.
992 * There are two types of zone ID, offset-based, such as '+01:30' and
993 * region-based, such as 'Europe/London'. These are parsed differently.
994 * If the parse starts with '+', '-', 'UT', 'UTC' or 'GMT', then the parser
995 * expects an offset-based zone and will not match region-based zones.
996 * The offset ID, such as '+02:30', may be at the start of the parse,
997 * or prefixed by 'UT', 'UTC' or 'GMT'. The offset ID parsing is
998 * equivalent to using {@link #appendOffset(String, String)} using the
999 * arguments 'HH:MM:ss' and the no offset string '0'.
1000 * If the parse starts with 'UT', 'UTC' or 'GMT', and the parser cannot
1001 * match a following offset ID, then {@link ZoneOffset#UTC} is selected.
1002 * In all other cases, the list of known region-based zones is used to
1003 * find the longest available match. If no match is found, and the parse
1004 * starts with 'Z', then {@code ZoneOffset.UTC} is selected.
1005 * The parser uses the {@linkplain #parseCaseInsensitive() case sensitive} setting.
1006 * <p>
1007 * For example, the following will parse:
1008 * <pre>
1009 * "Europe/London" -- ZoneId.of("Europe/London")
1010 * "Z" -- ZoneOffset.UTC
1011 * "UT" -- ZoneId.of("UT")
1012 * "UTC" -- ZoneId.of("UTC")
1013 * "GMT" -- ZoneId.of("GMT")
1014 * "+01:30" -- ZoneOffset.of("+01:30")
1015 * "UT+01:30" -- ZoneOffset.of("+01:30")
1016 * "UTC+01:30" -- ZoneOffset.of("+01:30")
1017 * "GMT+01:30" -- ZoneOffset.of("+01:30")
1018 * </pre>
1019 *
1020 * @return this, for chaining, not null
1021 * @see #appendZoneRegionId()
1022 */
1023 public DateTimeFormatterBuilder appendZoneId() {
1024 appendInternal(new ZoneIdPrinterParser(TemporalQueries.zoneId(), "ZoneId()"));
1025 return this;
1026 }
1027
1028 /**
1029 * Appends the time-zone region ID, such as 'Europe/Paris', to the formatter,
1030 * rejecting the zone ID if it is a {@code ZoneOffset}.
1031 * <p>
1032 * This appends an instruction to format/parse the zone ID to the builder
1033 * only if it is a region-based ID.
1034 * <p>
1035 * During formatting, the zone is obtained using a mechanism equivalent
1036 * to querying the temporal with {@link TemporalQueries#zoneId()}.
1037 * If the zone is a {@code ZoneOffset} or it cannot be obtained then
1038 * an exception is thrown unless the section of the formatter is optional.
1039 * If the zone is not an offset, then the zone will be printed using
1040 * the zone ID from {@link ZoneId#getId()}.
1041 * <p>
1042 * During parsing, the text must match a known zone or offset.
1043 * There are two types of zone ID, offset-based, such as '+01:30' and
1044 * region-based, such as 'Europe/London'. These are parsed differently.
1045 * If the parse starts with '+', '-', 'UT', 'UTC' or 'GMT', then the parser
1046 * expects an offset-based zone and will not match region-based zones.
1047 * The offset ID, such as '+02:30', may be at the start of the parse,
1048 * or prefixed by 'UT', 'UTC' or 'GMT'. The offset ID parsing is
1049 * equivalent to using {@link #appendOffset(String, String)} using the
1050 * arguments 'HH:MM:ss' and the no offset string '0'.
1051 * If the parse starts with 'UT', 'UTC' or 'GMT', and the parser cannot
1052 * match a following offset ID, then {@link ZoneOffset#UTC} is selected.
1053 * In all other cases, the list of known region-based zones is used to
1054 * find the longest available match. If no match is found, and the parse
1055 * starts with 'Z', then {@code ZoneOffset.UTC} is selected.
1056 * The parser uses the {@linkplain #parseCaseInsensitive() case sensitive} setting.
1057 * <p>
1058 * For example, the following will parse:
1059 * <pre>
1060 * "Europe/London" -- ZoneId.of("Europe/London")
1061 * "Z" -- ZoneOffset.UTC
1062 * "UT" -- ZoneId.of("UT")
1063 * "UTC" -- ZoneId.of("UTC")
1064 * "GMT" -- ZoneId.of("GMT")
1065 * "+01:30" -- ZoneOffset.of("+01:30")
1066 * "UT+01:30" -- ZoneOffset.of("+01:30")
1067 * "UTC+01:30" -- ZoneOffset.of("+01:30")
1068 * "GMT+01:30" -- ZoneOffset.of("+01:30")
1069 * </pre>
1070 * <p>
1071 * Note that this method is identical to {@code appendZoneId()} except
1072 * in the mechanism used to obtain the zone.
1073 * Note also that parsing accepts offsets, whereas formatting will never
1074 * produce one.
1075 *
1076 * @return this, for chaining, not null
1077 * @see #appendZoneId()
1078 */
1079 public DateTimeFormatterBuilder appendZoneRegionId() {
1080 appendInternal(new ZoneIdPrinterParser(QUERY_REGION_ONLY, "ZoneRegionId()"));
1081 return this;
1082 }
1083
1084 /**
1085 * Appends the time-zone ID, such as 'Europe/Paris' or '+02:00', to
1086 * the formatter, using the best available zone ID.
1087 * <p>
1088 * This appends an instruction to format/parse the best available
1089 * zone or offset ID to the builder.
1090 * The zone ID is obtained in a lenient manner that first attempts to
1091 * find a true zone ID, such as that on {@code ZonedDateTime}, and
1092 * then attempts to find an offset, such as that on {@code OffsetDateTime}.
1093 * <p>
1094 * During formatting, the zone is obtained using a mechanism equivalent
1095 * to querying the temporal with {@link TemporalQueries#zone()}.
1096 * It will be printed using the result of {@link ZoneId#getId()}.
1097 * If the zone cannot be obtained then an exception is thrown unless the
1098 * section of the formatter is optional.
1099 * <p>
1100 * During parsing, the text must match a known zone or offset.
1101 * There are two types of zone ID, offset-based, such as '+01:30' and
1102 * region-based, such as 'Europe/London'. These are parsed differently.
1103 * If the parse starts with '+', '-', 'UT', 'UTC' or 'GMT', then the parser
1104 * expects an offset-based zone and will not match region-based zones.
1105 * The offset ID, such as '+02:30', may be at the start of the parse,
1106 * or prefixed by 'UT', 'UTC' or 'GMT'. The offset ID parsing is
1107 * equivalent to using {@link #appendOffset(String, String)} using the
1108 * arguments 'HH:MM:ss' and the no offset string '0'.
1109 * If the parse starts with 'UT', 'UTC' or 'GMT', and the parser cannot
1110 * match a following offset ID, then {@link ZoneOffset#UTC} is selected.
1111 * In all other cases, the list of known region-based zones is used to
1112 * find the longest available match. If no match is found, and the parse
1113 * starts with 'Z', then {@code ZoneOffset.UTC} is selected.
1114 * The parser uses the {@linkplain #parseCaseInsensitive() case sensitive} setting.
1115 * <p>
1116 * For example, the following will parse:
1117 * <pre>
1118 * "Europe/London" -- ZoneId.of("Europe/London")
1119 * "Z" -- ZoneOffset.UTC
1120 * "UT" -- ZoneId.of("UT")
1121 * "UTC" -- ZoneId.of("UTC")
1122 * "GMT" -- ZoneId.of("GMT")
1123 * "+01:30" -- ZoneOffset.of("+01:30")
1124 * "UT+01:30" -- ZoneOffset.of("UT+01:30")
1125 * "UTC+01:30" -- ZoneOffset.of("UTC+01:30")
1126 * "GMT+01:30" -- ZoneOffset.of("GMT+01:30")
1127 * </pre>
1128 * <p>
1129 * Note that this method is identical to {@code appendZoneId()} except
1130 * in the mechanism used to obtain the zone.
1131 *
1132 * @return this, for chaining, not null
1133 * @see #appendZoneId()
1134 */
1135 public DateTimeFormatterBuilder appendZoneOrOffsetId() {
1136 appendInternal(new ZoneIdPrinterParser(TemporalQueries.zone(), "ZoneOrOffsetId()"));
1137 return this;
1138 }
1139
1140 /**
1141 * Appends the time-zone name, such as 'British Summer Time', to the formatter.
1142 * <p>
1143 * This appends an instruction to format/parse the textual name of the zone to
1144 * the builder.
1145 * <p>
1146 * During formatting, the zone is obtained using a mechanism equivalent
1147 * to querying the temporal with {@link TemporalQueries#zoneId()}.
1148 * If the zone is a {@code ZoneOffset} it will be printed using the
1149 * result of {@link ZoneOffset#getId()}.
1150 * If the zone is not an offset, the textual name will be looked up
1151 * for the locale set in the {@link DateTimeFormatter}.
1152 * If the temporal object being printed represents an instant, then the text
1153 * will be the summer or winter time text as appropriate.
1154 * If the lookup for text does not find any suitable result, then the
1155 * {@link ZoneId#getId() ID} will be printed instead.
1156 * If the zone cannot be obtained then an exception is thrown unless the
1157 * section of the formatter is optional.
1158 * <p>
1159 * During parsing, either the textual zone name, the zone ID or the offset
1160 * is accepted. Many textual zone names are not unique, such as CST can be
1161 * for both "Central Standard Time" and "China Standard Time". In this
1162 * situation, the zone id will be determined by the region information from
1163 * formatter's {@link DateTimeFormatter#getLocale() locale} and the standard
1164 * zone id for that area, for example, America/New_York for the America Eastern
1165 * zone. The {@link #appendZoneText(TextStyle, Set)} may be used
1166 * to specify a set of preferred {@link ZoneId} in this situation.
1167 *
1168 * @param textStyle the text style to use, not null
1169 * @return this, for chaining, not null
1170 */
1171 public DateTimeFormatterBuilder appendZoneText(TextStyle textStyle) {
1172 appendInternal(new ZoneTextPrinterParser(textStyle, null));
1173 return this;
1174 }
1175
1176 /**
1177 * Appends the time-zone name, such as 'British Summer Time', to the formatter.
1178 * <p>
1179 * This appends an instruction to format/parse the textual name of the zone to
1180 * the builder.
1181 * <p>
1182 * During formatting, the zone is obtained using a mechanism equivalent
1183 * to querying the temporal with {@link TemporalQueries#zoneId()}.
1184 * If the zone is a {@code ZoneOffset} it will be printed using the
1185 * result of {@link ZoneOffset#getId()}.
1186 * If the zone is not an offset, the textual name will be looked up
1187 * for the locale set in the {@link DateTimeFormatter}.
1188 * If the temporal object being printed represents an instant, then the text
1189 * will be the summer or winter time text as appropriate.
1190 * If the lookup for text does not find any suitable result, then the
1191 * {@link ZoneId#getId() ID} will be printed instead.
1192 * If the zone cannot be obtained then an exception is thrown unless the
1193 * section of the formatter is optional.
1194 * <p>
1195 * During parsing, either the textual zone name, the zone ID or the offset
1196 * is accepted. Many textual zone names are not unique, such as CST can be
1197 * for both "Central Standard Time" and "China Standard Time". In this
1198 * situation, the zone id will be determined by the region information from
1199 * formatter's {@link DateTimeFormatter#getLocale() locale} and the standard
1200 * zone id for that area, for example, America/New_York for the America Eastern
1201 * zone. This method also allows a set of preferred {@link ZoneId} to be
1202 * specified for parsing. The matched preferred zone id will be used if the
1203 * textural zone name being parsed is not unique.
1204 * <p>
1205 * If the zone cannot be parsed then an exception is thrown unless the
1206 * section of the formatter is optional.
1207 *
1208 * @param textStyle the text style to use, not null
1209 * @param preferredZones the set of preferred zone ids, not null
1210 * @return this, for chaining, not null
1211 */
1212 public DateTimeFormatterBuilder appendZoneText(TextStyle textStyle,
1213 Set<ZoneId> preferredZones) {
1214 Objects.requireNonNull(preferredZones, "preferredZones");
1215 appendInternal(new ZoneTextPrinterParser(textStyle, preferredZones));
1216 return this;
1217 }
1218
1219 //-----------------------------------------------------------------------
1220 /**
1221 * Appends the chronology ID, such as 'ISO' or 'ThaiBuddhist', to the formatter.
1222 * <p>
1223 * This appends an instruction to format/parse the chronology ID to the builder.
1224 * <p>
1225 * During formatting, the chronology is obtained using a mechanism equivalent
1226 * to querying the temporal with {@link TemporalQueries#chronology()}.
1227 * It will be printed using the result of {@link Chronology#getId()}.
1228 * If the chronology cannot be obtained then an exception is thrown unless the
1229 * section of the formatter is optional.
1230 * <p>
1231 * During parsing, the chronology is parsed and must match one of the chronologies
1232 * in {@link Chronology#getAvailableChronologies()}.
1233 * If the chronology cannot be parsed then an exception is thrown unless the
1234 * section of the formatter is optional.
1235 * The parser uses the {@linkplain #parseCaseInsensitive() case sensitive} setting.
1236 *
1237 * @return this, for chaining, not null
1238 */
1239 public DateTimeFormatterBuilder appendChronologyId() {
1240 appendInternal(new ChronoPrinterParser(null));
1241 return this;
1242 }
1243
1244 /**
1245 * Appends the chronology name to the formatter.
1246 * <p>
1247 * The calendar system name will be output during a format.
1248 * If the chronology cannot be obtained then an exception will be thrown.
1249 *
1250 * @param textStyle the text style to use, not null
1251 * @return this, for chaining, not null
1252 */
1253 public DateTimeFormatterBuilder appendChronologyText(TextStyle textStyle) {
1254 Objects.requireNonNull(textStyle, "textStyle");
1255 appendInternal(new ChronoPrinterParser(textStyle));
1256 return this;
1257 }
1258
1259 //-----------------------------------------------------------------------
1260 /**
1261 * Appends a localized date-time pattern to the formatter.
1262 * <p>
1263 * This appends a localized section to the builder, suitable for outputting
1264 * a date, time or date-time combination. The format of the localized
1265 * section is lazily looked up based on four items:
1266 * <ul>
1267 * <li>the {@code dateStyle} specified to this method
1268 * <li>the {@code timeStyle} specified to this method
1269 * <li>the {@code Locale} of the {@code DateTimeFormatter}
1270 * <li>the {@code Chronology}, selecting the best available
1271 * </ul>
1272 * During formatting, the chronology is obtained from the temporal object
1273 * being formatted, which may have been overridden by
1274 * {@link DateTimeFormatter#withChronology(Chronology)}.
1275 * The {@code FULL} and {@code LONG} styles typically require a time-zone.
1276 * When formatting using these styles, a {@code ZoneId} must be available,
1277 * either by using {@code ZonedDateTime} or {@link DateTimeFormatter#withZone}.
1278 * <p>
1279 * During parsing, if a chronology has already been parsed, then it is used.
1280 * Otherwise the default from {@code DateTimeFormatter.withChronology(Chronology)}
1281 * is used, with {@code IsoChronology} as the fallback.
1282 * <p>
1283 * Note that this method provides similar functionality to methods on
1284 * {@code DateFormat} such as {@link java.text.DateFormat#getDateTimeInstance(int, int)}.
1285 *
1286 * @param dateStyle the date style to use, null means no date required
1287 * @param timeStyle the time style to use, null means no time required
1288 * @return this, for chaining, not null
1289 * @throws IllegalArgumentException if both the date and time styles are null
1290 */
1291 public DateTimeFormatterBuilder appendLocalized(FormatStyle dateStyle, FormatStyle timeStyle) {
1292 if (dateStyle == null && timeStyle == null) {
1293 throw new IllegalArgumentException("Either the date or time style must be non-null");
1294 }
1295 appendInternal(new LocalizedPrinterParser(dateStyle, timeStyle));
1296 return this;
1297 }
1298
1299 //-----------------------------------------------------------------------
1300 /**
1301 * Appends a character literal to the formatter.
1302 * <p>
1303 * This character will be output during a format.
1304 *
1305 * @param literal the literal to append, not null
1306 * @return this, for chaining, not null
1307 */
1308 public DateTimeFormatterBuilder appendLiteral(char literal) {
1309 appendInternal(new CharLiteralPrinterParser(literal));
1310 return this;
1311 }
1312
1313 /**
1314 * Appends a string literal to the formatter.
1315 * <p>
1316 * This string will be output during a format.
1317 * <p>
1318 * If the literal is empty, nothing is added to the formatter.
1319 *
1320 * @param literal the literal to append, not null
1321 * @return this, for chaining, not null
1322 */
1323 public DateTimeFormatterBuilder appendLiteral(String literal) {
1324 Objects.requireNonNull(literal, "literal");
1325 if (literal.length() > 0) {
1326 if (literal.length() == 1) {
1327 appendInternal(new CharLiteralPrinterParser(literal.charAt(0)));
1328 } else {
1329 appendInternal(new StringLiteralPrinterParser(literal));
1330 }
1331 }
1332 return this;
1333 }
1334
1335 //-----------------------------------------------------------------------
1336 /**
1337 * Appends all the elements of a formatter to the builder.
1338 * <p>
1339 * This method has the same effect as appending each of the constituent
1340 * parts of the formatter directly to this builder.
1341 *
1342 * @param formatter the formatter to add, not null
1343 * @return this, for chaining, not null
1344 */
1345 public DateTimeFormatterBuilder append(DateTimeFormatter formatter) {
1346 Objects.requireNonNull(formatter, "formatter");
1347 appendInternal(formatter.toPrinterParser(false));
1348 return this;
1349 }
1350
1351 /**
1352 * Appends a formatter to the builder which will optionally format/parse.
1353 * <p>
1354 * This method has the same effect as appending each of the constituent
1355 * parts directly to this builder surrounded by an {@link #optionalStart()} and
1356 * {@link #optionalEnd()}.
1357 * <p>
1358 * The formatter will format if data is available for all the fields contained within it.
1359 * The formatter will parse if the string matches, otherwise no error is returned.
1360 *
1361 * @param formatter the formatter to add, not null
1362 * @return this, for chaining, not null
1363 */
1364 public DateTimeFormatterBuilder appendOptional(DateTimeFormatter formatter) {
1365 Objects.requireNonNull(formatter, "formatter");
1366 appendInternal(formatter.toPrinterParser(true));
1367 return this;
1368 }
1369
1370 //-----------------------------------------------------------------------
1371 /**
1372 * Appends the elements defined by the specified pattern to the builder.
1373 * <p>
1374 * All letters 'A' to 'Z' and 'a' to 'z' are reserved as pattern letters.
1375 * The characters '#', '{' and '}' are reserved for future use.
1376 * The characters '[' and ']' indicate optional patterns.
1377 * The following pattern letters are defined:
1378 * <pre>
1379 * Symbol Meaning Presentation Examples
1380 * ------ ------- ------------ -------
1381 * G era text AD; Anno Domini; A
1382 * u year year 2004; 04
1383 * y year-of-era year 2004; 04
1384 * D day-of-year number 189
1385 * M/L month-of-year number/text 7; 07; Jul; July; J
1386 * d day-of-month number 10
1387 * g modified-julian-day number 2451334
1388 *
1389 * Q/q quarter-of-year number/text 3; 03; Q3; 3rd quarter
1390 * Y week-based-year year 1996; 96
1391 * w week-of-week-based-year number 27
1392 * W week-of-month number 4
1393 * E day-of-week text Tue; Tuesday; T
1394 * e/c localized day-of-week number/text 2; 02; Tue; Tuesday; T
1395 * F week-of-month number 3
1396 *
1397 * a am-pm-of-day text PM
1398 * h clock-hour-of-am-pm (1-12) number 12
1399 * K hour-of-am-pm (0-11) number 0
1400 * k clock-hour-of-am-pm (1-24) number 0
1401 *
1402 * H hour-of-day (0-23) number 0
1403 * m minute-of-hour number 30
1404 * s second-of-minute number 55
1405 * S fraction-of-second fraction 978
1406 * A milli-of-day number 1234
1407 * n nano-of-second number 987654321
1408 * N nano-of-day number 1234000000
1409 *
1410 * V time-zone ID zone-id America/Los_Angeles; Z; -08:30
1411 * z time-zone name zone-name Pacific Standard Time; PST
1412 * O localized zone-offset offset-O GMT+8; GMT+08:00; UTC-08:00;
1413 * X zone-offset 'Z' for zero offset-X Z; -08; -0830; -08:30; -083015; -08:30:15
1414 * x zone-offset offset-x +0000; -08; -0830; -08:30; -083015; -08:30:15
1415 * Z zone-offset offset-Z +0000; -0800; -08:00
1416 *
1417 * p pad next pad modifier 1
1418 *
1419 * ' escape for text delimiter
1420 * '' single quote literal '
1421 * [ optional section start
1422 * ] optional section end
1423 * # reserved for future use
1424 * { reserved for future use
1425 * } reserved for future use
1426 * </pre>
1427 * <p>
1428 * The count of pattern letters determine the format.
1429 * See <a href="DateTimeFormatter.html#patterns">DateTimeFormatter</a> for a user-focused description of the patterns.
1430 * The following tables define how the pattern letters map to the builder.
1431 * <p>
1432 * <b>Date fields</b>: Pattern letters to output a date.
1433 * <pre>
1434 * Pattern Count Equivalent builder methods
1435 * ------- ----- --------------------------
1436 * G 1 appendText(ChronoField.ERA, TextStyle.SHORT)
1437 * GG 2 appendText(ChronoField.ERA, TextStyle.SHORT)
1438 * GGG 3 appendText(ChronoField.ERA, TextStyle.SHORT)
1439 * GGGG 4 appendText(ChronoField.ERA, TextStyle.FULL)
1440 * GGGGG 5 appendText(ChronoField.ERA, TextStyle.NARROW)
1441 *
1442 * u 1 appendValue(ChronoField.YEAR, 1, 19, SignStyle.NORMAL)
1443 * uu 2 appendValueReduced(ChronoField.YEAR, 2, 2000)
1444 * uuu 3 appendValue(ChronoField.YEAR, 3, 19, SignStyle.NORMAL)
1445 * u..u 4..n appendValue(ChronoField.YEAR, n, 19, SignStyle.EXCEEDS_PAD)
1446 * y 1 appendValue(ChronoField.YEAR_OF_ERA, 1, 19, SignStyle.NORMAL)
1447 * yy 2 appendValueReduced(ChronoField.YEAR_OF_ERA, 2, 2000)
1448 * yyy 3 appendValue(ChronoField.YEAR_OF_ERA, 3, 19, SignStyle.NORMAL)
1449 * y..y 4..n appendValue(ChronoField.YEAR_OF_ERA, n, 19, SignStyle.EXCEEDS_PAD)
1450 * Y 1 append special localized WeekFields element for numeric week-based-year
1451 * YY 2 append special localized WeekFields element for reduced numeric week-based-year 2 digits
1452 * YYY 3 append special localized WeekFields element for numeric week-based-year (3, 19, SignStyle.NORMAL)
1453 * Y..Y 4..n append special localized WeekFields element for numeric week-based-year (n, 19, SignStyle.EXCEEDS_PAD)
1454 *
1455 * Q 1 appendValue(IsoFields.QUARTER_OF_YEAR)
1456 * QQ 2 appendValue(IsoFields.QUARTER_OF_YEAR, 2)
1457 * QQQ 3 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.SHORT)
1458 * QQQQ 4 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.FULL)
1459 * QQQQQ 5 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.NARROW)
1460 * q 1 appendValue(IsoFields.QUARTER_OF_YEAR)
1461 * qq 2 appendValue(IsoFields.QUARTER_OF_YEAR, 2)
1462 * qqq 3 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.SHORT_STANDALONE)
1463 * qqqq 4 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.FULL_STANDALONE)
1464 * qqqqq 5 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.NARROW_STANDALONE)
1465 *
1466 * M 1 appendValue(ChronoField.MONTH_OF_YEAR)
1467 * MM 2 appendValue(ChronoField.MONTH_OF_YEAR, 2)
1468 * MMM 3 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.SHORT)
1469 * MMMM 4 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.FULL)
1470 * MMMMM 5 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.NARROW)
1471 * L 1 appendValue(ChronoField.MONTH_OF_YEAR)
1472 * LL 2 appendValue(ChronoField.MONTH_OF_YEAR, 2)
1473 * LLL 3 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.SHORT_STANDALONE)
1474 * LLLL 4 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.FULL_STANDALONE)
1475 * LLLLL 5 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.NARROW_STANDALONE)
1476 *
1477 * w 1 append special localized WeekFields element for numeric week-of-year
1478 * ww 2 append special localized WeekFields element for numeric week-of-year, zero-padded
1479 * W 1 append special localized WeekFields element for numeric week-of-month
1480 * d 1 appendValue(ChronoField.DAY_OF_MONTH)
1481 * dd 2 appendValue(ChronoField.DAY_OF_MONTH, 2)
1482 * D..D 1..3 appendValue(ChronoField.DAY_OF_YEAR, n, 19, SignStyle.NORMAL)
1483 * F 1 appendValue(ChronoField.ALIGNED_DAY_OF_WEEK_IN_MONTH)
1484 * g..g 1..n appendValue(JulianFields.MODIFIED_JULIAN_DAY, n, 19, SignStyle.NORMAL)
1485 * E 1 appendText(ChronoField.DAY_OF_WEEK, TextStyle.SHORT)
1486 * EE 2 appendText(ChronoField.DAY_OF_WEEK, TextStyle.SHORT)
1487 * EEE 3 appendText(ChronoField.DAY_OF_WEEK, TextStyle.SHORT)
1488 * EEEE 4 appendText(ChronoField.DAY_OF_WEEK, TextStyle.FULL)
1489 * EEEEE 5 appendText(ChronoField.DAY_OF_WEEK, TextStyle.NARROW)
1490 * e 1 append special localized WeekFields element for numeric day-of-week
1491 * ee 2 append special localized WeekFields element for numeric day-of-week, zero-padded
1492 * eee 3 appendText(ChronoField.DAY_OF_WEEK, TextStyle.SHORT)
1493 * eeee 4 appendText(ChronoField.DAY_OF_WEEK, TextStyle.FULL)
1494 * eeeee 5 appendText(ChronoField.DAY_OF_WEEK, TextStyle.NARROW)
1495 * c 1 append special localized WeekFields element for numeric day-of-week
1496 * ccc 3 appendText(ChronoField.DAY_OF_WEEK, TextStyle.SHORT_STANDALONE)
1497 * cccc 4 appendText(ChronoField.DAY_OF_WEEK, TextStyle.FULL_STANDALONE)
1498 * ccccc 5 appendText(ChronoField.DAY_OF_WEEK, TextStyle.NARROW_STANDALONE)
1499 * </pre>
1500 * <p>
1501 * <b>Time fields</b>: Pattern letters to output a time.
1502 * <pre>
1503 * Pattern Count Equivalent builder methods
1504 * ------- ----- --------------------------
1505 * a 1 appendText(ChronoField.AMPM_OF_DAY, TextStyle.SHORT)
1506 * h 1 appendValue(ChronoField.CLOCK_HOUR_OF_AMPM)
1507 * hh 2 appendValue(ChronoField.CLOCK_HOUR_OF_AMPM, 2)
1508 * H 1 appendValue(ChronoField.HOUR_OF_DAY)
1509 * HH 2 appendValue(ChronoField.HOUR_OF_DAY, 2)
1510 * k 1 appendValue(ChronoField.CLOCK_HOUR_OF_DAY)
1511 * kk 2 appendValue(ChronoField.CLOCK_HOUR_OF_DAY, 2)
1512 * K 1 appendValue(ChronoField.HOUR_OF_AMPM)
1513 * KK 2 appendValue(ChronoField.HOUR_OF_AMPM, 2)
1514 * m 1 appendValue(ChronoField.MINUTE_OF_HOUR)
1515 * mm 2 appendValue(ChronoField.MINUTE_OF_HOUR, 2)
1516 * s 1 appendValue(ChronoField.SECOND_OF_MINUTE)
1517 * ss 2 appendValue(ChronoField.SECOND_OF_MINUTE, 2)
1518 *
1519 * S..S 1..n appendFraction(ChronoField.NANO_OF_SECOND, n, n, false)
1520 * A 1 appendValue(ChronoField.MILLI_OF_DAY)
1521 * A..A 2..n appendValue(ChronoField.MILLI_OF_DAY, n)
1522 * n 1 appendValue(ChronoField.NANO_OF_SECOND)
1523 * n..n 2..n appendValue(ChronoField.NANO_OF_SECOND, n)
1524 * N 1 appendValue(ChronoField.NANO_OF_DAY)
1525 * N..N 2..n appendValue(ChronoField.NANO_OF_DAY, n)
1526 * </pre>
1527 * <p>
1528 * <b>Zone ID</b>: Pattern letters to output {@code ZoneId}.
1529 * <pre>
1530 * Pattern Count Equivalent builder methods
1531 * ------- ----- --------------------------
1532 * VV 2 appendZoneId()
1533 * z 1 appendZoneText(TextStyle.SHORT)
1534 * zz 2 appendZoneText(TextStyle.SHORT)
1535 * zzz 3 appendZoneText(TextStyle.SHORT)
1536 * zzzz 4 appendZoneText(TextStyle.FULL)
1537 * </pre>
1538 * <p>
1539 * <b>Zone offset</b>: Pattern letters to output {@code ZoneOffset}.
1540 * <pre>
1541 * Pattern Count Equivalent builder methods
1542 * ------- ----- --------------------------
1543 * O 1 appendLocalizedOffset(TextStyle.SHORT)
1544 * OOOO 4 appendLocalizedOffset(TextStyle.FULL)
1545 * X 1 appendOffset("+HHmm","Z")
1546 * XX 2 appendOffset("+HHMM","Z")
1547 * XXX 3 appendOffset("+HH:MM","Z")
1548 * XXXX 4 appendOffset("+HHMMss","Z")
1549 * XXXXX 5 appendOffset("+HH:MM:ss","Z")
1550 * x 1 appendOffset("+HHmm","+00")
1551 * xx 2 appendOffset("+HHMM","+0000")
1552 * xxx 3 appendOffset("+HH:MM","+00:00")
1553 * xxxx 4 appendOffset("+HHMMss","+0000")
1554 * xxxxx 5 appendOffset("+HH:MM:ss","+00:00")
1555 * Z 1 appendOffset("+HHMM","+0000")
1556 * ZZ 2 appendOffset("+HHMM","+0000")
1557 * ZZZ 3 appendOffset("+HHMM","+0000")
1558 * ZZZZ 4 appendLocalizedOffset(TextStyle.FULL)
1559 * ZZZZZ 5 appendOffset("+HH:MM:ss","Z")
1560 * </pre>
1561 * <p>
1562 * <b>Modifiers</b>: Pattern letters that modify the rest of the pattern:
1563 * <pre>
1564 * Pattern Count Equivalent builder methods
1565 * ------- ----- --------------------------
1566 * [ 1 optionalStart()
1567 * ] 1 optionalEnd()
1568 * p..p 1..n padNext(n)
1569 * </pre>
1570 * <p>
1571 * Any sequence of letters not specified above, unrecognized letter or
1572 * reserved character will throw an exception.
1573 * Future versions may add to the set of patterns.
1574 * It is recommended to use single quotes around all characters that you want
1575 * to output directly to ensure that future changes do not break your application.
1576 * <p>
1577 * Note that the pattern string is similar, but not identical, to
1578 * {@link java.text.SimpleDateFormat SimpleDateFormat}.
1579 * The pattern string is also similar, but not identical, to that defined by the
1580 * Unicode Common Locale Data Repository (CLDR/LDML).
1581 * Pattern letters 'X' and 'u' are aligned with Unicode CLDR/LDML.
1582 * By contrast, {@code SimpleDateFormat} uses 'u' for the numeric day of week.
1583 * Pattern letters 'y' and 'Y' parse years of two digits and more than 4 digits differently.
1584 * Pattern letters 'n', 'A', 'N', and 'p' are added.
1585 * Number types will reject large numbers.
1586 *
1587 * @param pattern the pattern to add, not null
1588 * @return this, for chaining, not null
1589 * @throws IllegalArgumentException if the pattern is invalid
1590 */
1591 public DateTimeFormatterBuilder appendPattern(String pattern) {
1592 Objects.requireNonNull(pattern, "pattern");
1593 parsePattern(pattern);
1594 return this;
1595 }
1596
1597 private void parsePattern(String pattern) {
1598 for (int pos = 0; pos < pattern.length(); pos++) {
1599 char cur = pattern.charAt(pos);
1600 if ((cur >= 'A' && cur <= 'Z') || (cur >= 'a' && cur <= 'z')) {
1601 int start = pos++;
1602 for ( ; pos < pattern.length() && pattern.charAt(pos) == cur; pos++); // short loop
1603 int count = pos - start;
1604 // padding
1605 if (cur == 'p') {
1606 int pad = 0;
1607 if (pos < pattern.length()) {
1608 cur = pattern.charAt(pos);
1609 if ((cur >= 'A' && cur <= 'Z') || (cur >= 'a' && cur <= 'z')) {
1610 pad = count;
1611 start = pos++;
1612 for ( ; pos < pattern.length() && pattern.charAt(pos) == cur; pos++); // short loop
1613 count = pos - start;
1614 }
1615 }
1616 if (pad == 0) {
1617 throw new IllegalArgumentException(
1618 "Pad letter 'p' must be followed by valid pad pattern: " + pattern);
1619 }
1620 padNext(pad); // pad and continue parsing
1621 }
1622 // main rules
1623 TemporalField field = FIELD_MAP.get(cur);
1624 if (field != null) {
1625 parseField(cur, count, field);
1626 } else if (cur == 'z') {
1627 if (count > 4) {
1628 throw new IllegalArgumentException("Too many pattern letters: " + cur);
1629 } else if (count == 4) {
1630 appendZoneText(TextStyle.FULL);
1631 } else {
1632 appendZoneText(TextStyle.SHORT);
1633 }
1634 } else if (cur == 'V') {
1635 if (count != 2) {
1636 throw new IllegalArgumentException("Pattern letter count must be 2: " + cur);
1637 }
1638 appendZoneId();
1639 } else if (cur == 'Z') {
1640 if (count < 4) {
1641 appendOffset("+HHMM", "+0000");
1642 } else if (count == 4) {
1643 appendLocalizedOffset(TextStyle.FULL);
1644 } else if (count == 5) {
1645 appendOffset("+HH:MM:ss","Z");
1646 } else {
1647 throw new IllegalArgumentException("Too many pattern letters: " + cur);
1648 }
1649 } else if (cur == 'O') {
1650 if (count == 1) {
1651 appendLocalizedOffset(TextStyle.SHORT);
1652 } else if (count == 4) {
1653 appendLocalizedOffset(TextStyle.FULL);
1654 } else {
1655 throw new IllegalArgumentException("Pattern letter count must be 1 or 4: " + cur);
1656 }
1657 } else if (cur == 'X') {
1658 if (count > 5) {
1659 throw new IllegalArgumentException("Too many pattern letters: " + cur);
1660 }
1661 appendOffset(OffsetIdPrinterParser.PATTERNS[count + (count == 1 ? 0 : 1)], "Z");
1662 } else if (cur == 'x') {
1663 if (count > 5) {
1664 throw new IllegalArgumentException("Too many pattern letters: " + cur);
1665 }
1666 String zero = (count == 1 ? "+00" : (count % 2 == 0 ? "+0000" : "+00:00"));
1667 appendOffset(OffsetIdPrinterParser.PATTERNS[count + (count == 1 ? 0 : 1)], zero);
1668 } else if (cur == 'W') {
1669 // Fields defined by Locale
1670 if (count > 1) {
1671 throw new IllegalArgumentException("Too many pattern letters: " + cur);
1672 }
1673 appendInternal(new WeekBasedFieldPrinterParser(cur, count));
1674 } else if (cur == 'w') {
1675 // Fields defined by Locale
1676 if (count > 2) {
1677 throw new IllegalArgumentException("Too many pattern letters: " + cur);
1678 }
1679 appendInternal(new WeekBasedFieldPrinterParser(cur, count));
1680 } else if (cur == 'Y') {
1681 // Fields defined by Locale
1682 appendInternal(new WeekBasedFieldPrinterParser(cur, count));
1683 } else {
1684 throw new IllegalArgumentException("Unknown pattern letter: " + cur);
1685 }
1686 pos--;
1687
1688 } else if (cur == '\'') {
1689 // parse literals
1690 int start = pos++;
1691 for ( ; pos < pattern.length(); pos++) {
1692 if (pattern.charAt(pos) == '\'') {
1693 if (pos + 1 < pattern.length() && pattern.charAt(pos + 1) == '\'') {
1694 pos++;
1695 } else {
1696 break; // end of literal
1697 }
1698 }
1699 }
1700 if (pos >= pattern.length()) {
1701 throw new IllegalArgumentException("Pattern ends with an incomplete string literal: " + pattern);
1702 }
1703 String str = pattern.substring(start + 1, pos);
1704 if (str.length() == 0) {
1705 appendLiteral('\'');
1706 } else {
1707 appendLiteral(str.replace("''", "'"));
1708 }
1709
1710 } else if (cur == '[') {
1711 optionalStart();
1712
1713 } else if (cur == ']') {
1714 if (active.parent == null) {
1715 throw new IllegalArgumentException("Pattern invalid as it contains ] without previous [");
1716 }
1717 optionalEnd();
1718
1719 } else if (cur == '{' || cur == '}' || cur == '#') {
1720 throw new IllegalArgumentException("Pattern includes reserved character: '" + cur + "'");
1721 } else {
1722 appendLiteral(cur);
1723 }
1724 }
1725 }
1726
1727 @SuppressWarnings("fallthrough")
1728 private void parseField(char cur, int count, TemporalField field) {
1729 boolean standalone = false;
1730 switch (cur) {
1731 case 'u':
1732 case 'y':
1733 if (count == 2) {
1734 appendValueReduced(field, 2, 2, ReducedPrinterParser.BASE_DATE);
1735 } else if (count < 4) {
1736 appendValue(field, count, 19, SignStyle.NORMAL);
1737 } else {
1738 appendValue(field, count, 19, SignStyle.EXCEEDS_PAD);
1739 }
1740 break;
1741 case 'c':
1742 if (count == 2) {
1743 throw new IllegalArgumentException("Invalid pattern \"cc\"");
1744 }
1745 /*fallthrough*/
1746 case 'L':
1747 case 'q':
1748 standalone = true;
1749 /*fallthrough*/
1750 case 'M':
1751 case 'Q':
1752 case 'E':
1753 case 'e':
1754 switch (count) {
1755 case 1:
1756 case 2:
1757 if (cur == 'c' || cur == 'e') {
1758 appendInternal(new WeekBasedFieldPrinterParser(cur, count));
1759 } else if (cur == 'E') {
1760 appendText(field, TextStyle.SHORT);
1761 } else {
1762 if (count == 1) {
1763 appendValue(field);
1764 } else {
1765 appendValue(field, 2);
1766 }
1767 }
1768 break;
1769 case 3:
1770 appendText(field, standalone ? TextStyle.SHORT_STANDALONE : TextStyle.SHORT);
1771 break;
1772 case 4:
1773 appendText(field, standalone ? TextStyle.FULL_STANDALONE : TextStyle.FULL);
1774 break;
1775 case 5:
1776 appendText(field, standalone ? TextStyle.NARROW_STANDALONE : TextStyle.NARROW);
1777 break;
1778 default:
1779 throw new IllegalArgumentException("Too many pattern letters: " + cur);
1780 }
1781 break;
1782 case 'a':
1783 if (count == 1) {
1784 appendText(field, TextStyle.SHORT);
1785 } else {
1786 throw new IllegalArgumentException("Too many pattern letters: " + cur);
1787 }
1788 break;
1789 case 'G':
1790 switch (count) {
1791 case 1:
1792 case 2:
1793 case 3:
1794 appendText(field, TextStyle.SHORT);
1795 break;
1796 case 4:
1797 appendText(field, TextStyle.FULL);
1798 break;
1799 case 5:
1800 appendText(field, TextStyle.NARROW);
1801 break;
1802 default:
1803 throw new IllegalArgumentException("Too many pattern letters: " + cur);
1804 }
1805 break;
1806 case 'S':
1807 appendFraction(NANO_OF_SECOND, count, count, false);
1808 break;
1809 case 'F':
1810 if (count == 1) {
1811 appendValue(field);
1812 } else {
1813 throw new IllegalArgumentException("Too many pattern letters: " + cur);
1814 }
1815 break;
1816 case 'd':
1817 case 'h':
1818 case 'H':
1819 case 'k':
1820 case 'K':
1821 case 'm':
1822 case 's':
1823 if (count == 1) {
1824 appendValue(field);
1825 } else if (count == 2) {
1826 appendValue(field, count);
1827 } else {
1828 throw new IllegalArgumentException("Too many pattern letters: " + cur);
1829 }
1830 break;
1831 case 'D':
1832 if (count > 3) {
1833 throw new IllegalArgumentException("Too many pattern letters: " + cur);
1834 } else {
1835 appendValue(field, count, 19, SignStyle.NORMAL);
1836 }
1837 break;
1838 case 'g':
1839 appendValue(field, count, 19, SignStyle.NORMAL);
1840 break;
1841 default:
1842 if (count == 1) {
1843 appendValue(field);
1844 } else {
1845 appendValue(field, count);
1846 }
1847 break;
1848 }
1849 }
1850
1851 /** Map of letters to fields. */
1852 private static final Map<Character, TemporalField> FIELD_MAP = new HashMap<>();
1853 static {
1854 // SDF = SimpleDateFormat
1855 FIELD_MAP.put('G', ChronoField.ERA); // SDF, LDML (different to both for 1/2 chars)
1856 FIELD_MAP.put('y', ChronoField.YEAR_OF_ERA); // SDF, LDML
1857 FIELD_MAP.put('u', ChronoField.YEAR); // LDML (different in SDF)
1858 FIELD_MAP.put('Q', IsoFields.QUARTER_OF_YEAR); // LDML (removed quarter from 310)
1859 FIELD_MAP.put('q', IsoFields.QUARTER_OF_YEAR); // LDML (stand-alone)
1860 FIELD_MAP.put('M', ChronoField.MONTH_OF_YEAR); // SDF, LDML
1861 FIELD_MAP.put('L', ChronoField.MONTH_OF_YEAR); // SDF, LDML (stand-alone)
1862 FIELD_MAP.put('D', ChronoField.DAY_OF_YEAR); // SDF, LDML
1863 FIELD_MAP.put('d', ChronoField.DAY_OF_MONTH); // SDF, LDML
1864 FIELD_MAP.put('F', ChronoField.ALIGNED_DAY_OF_WEEK_IN_MONTH); // SDF, LDML
1865 FIELD_MAP.put('E', ChronoField.DAY_OF_WEEK); // SDF, LDML (different to both for 1/2 chars)
1866 FIELD_MAP.put('c', ChronoField.DAY_OF_WEEK); // LDML (stand-alone)
1867 FIELD_MAP.put('e', ChronoField.DAY_OF_WEEK); // LDML (needs localized week number)
1868 FIELD_MAP.put('a', ChronoField.AMPM_OF_DAY); // SDF, LDML
1869 FIELD_MAP.put('H', ChronoField.HOUR_OF_DAY); // SDF, LDML
1870 FIELD_MAP.put('k', ChronoField.CLOCK_HOUR_OF_DAY); // SDF, LDML
1871 FIELD_MAP.put('K', ChronoField.HOUR_OF_AMPM); // SDF, LDML
1872 FIELD_MAP.put('h', ChronoField.CLOCK_HOUR_OF_AMPM); // SDF, LDML
1873 FIELD_MAP.put('m', ChronoField.MINUTE_OF_HOUR); // SDF, LDML
1874 FIELD_MAP.put('s', ChronoField.SECOND_OF_MINUTE); // SDF, LDML
1875 FIELD_MAP.put('S', ChronoField.NANO_OF_SECOND); // LDML (SDF uses milli-of-second number)
1876 FIELD_MAP.put('A', ChronoField.MILLI_OF_DAY); // LDML
1877 FIELD_MAP.put('n', ChronoField.NANO_OF_SECOND); // 310 (proposed for LDML)
1878 FIELD_MAP.put('N', ChronoField.NANO_OF_DAY); // 310 (proposed for LDML)
1879 FIELD_MAP.put('g', JulianFields.MODIFIED_JULIAN_DAY);
1880 // 310 - z - time-zone names, matches LDML and SimpleDateFormat 1 to 4
1881 // 310 - Z - matches SimpleDateFormat and LDML
1882 // 310 - V - time-zone id, matches LDML
1883 // 310 - p - prefix for padding
1884 // 310 - X - matches LDML, almost matches SDF for 1, exact match 2&3, extended 4&5
1885 // 310 - x - matches LDML
1886 // 310 - w, W, and Y are localized forms matching LDML
1887 // LDML - U - cycle year name, not supported by 310 yet
1888 // LDML - l - deprecated
1889 // LDML - j - not relevant
1890 // LDML - v,V - extended time-zone names
1891 }
1892
1893 //-----------------------------------------------------------------------
1894 /**
1895 * Causes the next added printer/parser to pad to a fixed width using a space.
1896 * <p>
1897 * This padding will pad to a fixed width using spaces.
1898 * <p>
1899 * During formatting, the decorated element will be output and then padded
1900 * to the specified width. An exception will be thrown during formatting if
1901 * the pad width is exceeded.
1902 * <p>
1903 * During parsing, the padding and decorated element are parsed.
1904 * If parsing is lenient, then the pad width is treated as a maximum.
1905 * The padding is parsed greedily. Thus, if the decorated element starts with
1906 * the pad character, it will not be parsed.
1907 *
1908 * @param padWidth the pad width, 1 or greater
1909 * @return this, for chaining, not null
1910 * @throws IllegalArgumentException if pad width is too small
1911 */
1912 public DateTimeFormatterBuilder padNext(int padWidth) {
1913 return padNext(padWidth, ' ');
1914 }
1915
1916 /**
1917 * Causes the next added printer/parser to pad to a fixed width.
1918 * <p>
1919 * This padding is intended for padding other than zero-padding.
1920 * Zero-padding should be achieved using the appendValue methods.
1921 * <p>
1922 * During formatting, the decorated element will be output and then padded
1923 * to the specified width. An exception will be thrown during formatting if
1924 * the pad width is exceeded.
1925 * <p>
1926 * During parsing, the padding and decorated element are parsed.
1927 * If parsing is lenient, then the pad width is treated as a maximum.
1928 * If parsing is case insensitive, then the pad character is matched ignoring case.
1929 * The padding is parsed greedily. Thus, if the decorated element starts with
1930 * the pad character, it will not be parsed.
1931 *
1932 * @param padWidth the pad width, 1 or greater
1933 * @param padChar the pad character
1934 * @return this, for chaining, not null
1935 * @throws IllegalArgumentException if pad width is too small
1936 */
1937 public DateTimeFormatterBuilder padNext(int padWidth, char padChar) {
1938 if (padWidth < 1) {
1939 throw new IllegalArgumentException("The pad width must be at least one but was " + padWidth);
1940 }
1941 active.padNextWidth = padWidth;
1942 active.padNextChar = padChar;
1943 active.valueParserIndex = -1;
1944 return this;
1945 }
1946
1947 //-----------------------------------------------------------------------
1948 /**
1949 * Mark the start of an optional section.
1950 * <p>
1951 * The output of formatting can include optional sections, which may be nested.
1952 * An optional section is started by calling this method and ended by calling
1953 * {@link #optionalEnd()} or by ending the build process.
1954 * <p>
1955 * All elements in the optional section are treated as optional.
1956 * During formatting, the section is only output if data is available in the
1957 * {@code TemporalAccessor} for all the elements in the section.
1958 * During parsing, the whole section may be missing from the parsed string.
1959 * <p>
1960 * For example, consider a builder setup as
1961 * {@code builder.appendValue(HOUR_OF_DAY,2).optionalStart().appendValue(MINUTE_OF_HOUR,2)}.
1962 * The optional section ends automatically at the end of the builder.
1963 * During formatting, the minute will only be output if its value can be obtained from the date-time.
1964 * During parsing, the input will be successfully parsed whether the minute is present or not.
1965 *
1966 * @return this, for chaining, not null
1967 */
1968 public DateTimeFormatterBuilder optionalStart() {
1969 active.valueParserIndex = -1;
1970 active = new DateTimeFormatterBuilder(active, true);
1971 return this;
1972 }
1973
1974 /**
1975 * Ends an optional section.
1976 * <p>
1977 * The output of formatting can include optional sections, which may be nested.
1978 * An optional section is started by calling {@link #optionalStart()} and ended
1979 * using this method (or at the end of the builder).
1980 * <p>
1981 * Calling this method without having previously called {@code optionalStart}
1982 * will throw an exception.
1983 * Calling this method immediately after calling {@code optionalStart} has no effect
1984 * on the formatter other than ending the (empty) optional section.
1985 * <p>
1986 * All elements in the optional section are treated as optional.
1987 * During formatting, the section is only output if data is available in the
1988 * {@code TemporalAccessor} for all the elements in the section.
1989 * During parsing, the whole section may be missing from the parsed string.
1990 * <p>
1991 * For example, consider a builder setup as
1992 * {@code builder.appendValue(HOUR_OF_DAY,2).optionalStart().appendValue(MINUTE_OF_HOUR,2).optionalEnd()}.
1993 * During formatting, the minute will only be output if its value can be obtained from the date-time.
1994 * During parsing, the input will be successfully parsed whether the minute is present or not.
1995 *
1996 * @return this, for chaining, not null
1997 * @throws IllegalStateException if there was no previous call to {@code optionalStart}
1998 */
1999 public DateTimeFormatterBuilder optionalEnd() {
2000 if (active.parent == null) {
2001 throw new IllegalStateException("Cannot call optionalEnd() as there was no previous call to optionalStart()");
2002 }
2003 if (active.printerParsers.size() > 0) {
2004 CompositePrinterParser cpp = new CompositePrinterParser(active.printerParsers, active.optional);
2005 active = active.parent;
2006 appendInternal(cpp);
2007 } else {
2008 active = active.parent;
2009 }
2010 return this;
2011 }
2012
2013 //-----------------------------------------------------------------------
2014 /**
2015 * Appends a printer and/or parser to the internal list handling padding.
2016 *
2017 * @param pp the printer-parser to add, not null
2018 * @return the index into the active parsers list
2019 */
2020 private int appendInternal(DateTimePrinterParser pp) {
2021 Objects.requireNonNull(pp, "pp");
2022 if (active.padNextWidth > 0) {
2023 if (pp != null) {
2024 pp = new PadPrinterParserDecorator(pp, active.padNextWidth, active.padNextChar);
2025 }
2026 active.padNextWidth = 0;
2027 active.padNextChar = 0;
2028 }
2029 active.printerParsers.add(pp);
2030 active.valueParserIndex = -1;
2031 return active.printerParsers.size() - 1;
2032 }
2033
2034 //-----------------------------------------------------------------------
2035 /**
2036 * Completes this builder by creating the {@code DateTimeFormatter}
2037 * using the default locale.
2038 * <p>
2039 * This will create a formatter with the {@linkplain Locale#getDefault(Locale.Category) default FORMAT locale}.
2040 * Numbers will be printed and parsed using the standard DecimalStyle.
2041 * The resolver style will be {@link ResolverStyle#SMART SMART}.
2042 * <p>
2043 * Calling this method will end any open optional sections by repeatedly
2044 * calling {@link #optionalEnd()} before creating the formatter.
2045 * <p>
2046 * This builder can still be used after creating the formatter if desired,
2047 * although the state may have been changed by calls to {@code optionalEnd}.
2048 *
2049 * @return the created formatter, not null
2050 */
2051 public DateTimeFormatter toFormatter() {
2052 return toFormatter(Locale.getDefault(Locale.Category.FORMAT));
2053 }
2054
2055 /**
2056 * Completes this builder by creating the {@code DateTimeFormatter}
2057 * using the specified locale.
2058 * <p>
2059 * This will create a formatter with the specified locale.
2060 * Numbers will be printed and parsed using the standard DecimalStyle.
2061 * The resolver style will be {@link ResolverStyle#SMART SMART}.
2062 * <p>
2063 * Calling this method will end any open optional sections by repeatedly
2064 * calling {@link #optionalEnd()} before creating the formatter.
2065 * <p>
2066 * This builder can still be used after creating the formatter if desired,
2067 * although the state may have been changed by calls to {@code optionalEnd}.
2068 *
2069 * @param locale the locale to use for formatting, not null
2070 * @return the created formatter, not null
2071 */
2072 public DateTimeFormatter toFormatter(Locale locale) {
2073 return toFormatter(locale, ResolverStyle.SMART, null);
2074 }
2075
2076 /**
2077 * Completes this builder by creating the formatter.
2078 * This uses the default locale.
2079 *
2080 * @param resolverStyle the resolver style to use, not null
2081 * @return the created formatter, not null
2082 */
2083 DateTimeFormatter toFormatter(ResolverStyle resolverStyle, Chronology chrono) {
2084 return toFormatter(Locale.getDefault(Locale.Category.FORMAT), resolverStyle, chrono);
2085 }
2086
2087 /**
2088 * Completes this builder by creating the formatter.
2089 *
2090 * @param locale the locale to use for formatting, not null
2091 * @param chrono the chronology to use, may be null
2092 * @return the created formatter, not null
2093 */
2094 private DateTimeFormatter toFormatter(Locale locale, ResolverStyle resolverStyle, Chronology chrono) {
2095 Objects.requireNonNull(locale, "locale");
2096 while (active.parent != null) {
2097 optionalEnd();
2098 }
2099 CompositePrinterParser pp = new CompositePrinterParser(printerParsers, false);
2100 return new DateTimeFormatter(pp, locale, DecimalStyle.STANDARD,
2101 resolverStyle, null, chrono, null);
2102 }
2103
2104 //-----------------------------------------------------------------------
2105 /**
2106 * Strategy for formatting/parsing date-time information.
2107 * <p>
2108 * The printer may format any part, or the whole, of the input date-time object.
2109 * Typically, a complete format is constructed from a number of smaller
2110 * units, each outputting a single field.
2111 * <p>
2112 * The parser may parse any piece of text from the input, storing the result
2113 * in the context. Typically, each individual parser will just parse one
2114 * field, such as the day-of-month, storing the value in the context.
2115 * Once the parse is complete, the caller will then resolve the parsed values
2116 * to create the desired object, such as a {@code LocalDate}.
2117 * <p>
2118 * The parse position will be updated during the parse. Parsing will start at
2119 * the specified index and the return value specifies the new parse position
2120 * for the next parser. If an error occurs, the returned index will be negative
2121 * and will have the error position encoded using the complement operator.
2122 *
2123 * @implSpec
2124 * This interface must be implemented with care to ensure other classes operate correctly.
2125 * All implementations that can be instantiated must be final, immutable and thread-safe.
2126 * <p>
2127 * The context is not a thread-safe object and a new instance will be created
2128 * for each format that occurs. The context must not be stored in an instance
2129 * variable or shared with any other threads.
2130 */
2131 interface DateTimePrinterParser {
2132
2133 /**
2134 * Prints the date-time object to the buffer.
2135 * <p>
2136 * The context holds information to use during the format.
2137 * It also contains the date-time information to be printed.
2138 * <p>
2139 * The buffer must not be mutated beyond the content controlled by the implementation.
2140 *
2141 * @param context the context to format using, not null
2142 * @param buf the buffer to append to, not null
2143 * @return false if unable to query the value from the date-time, true otherwise
2144 * @throws DateTimeException if the date-time cannot be printed successfully
2145 */
2146 boolean format(DateTimePrintContext context, StringBuilder buf);
2147
2148 /**
2149 * Parses text into date-time information.
2150 * <p>
2151 * The context holds information to use during the parse.
2152 * It is also used to store the parsed date-time information.
2153 *
2154 * @param context the context to use and parse into, not null
2155 * @param text the input text to parse, not null
2156 * @param position the position to start parsing at, from 0 to the text length
2157 * @return the new parse position, where negative means an error with the
2158 * error position encoded using the complement ~ operator
2159 * @throws NullPointerException if the context or text is null
2160 * @throws IndexOutOfBoundsException if the position is invalid
2161 */
2162 int parse(DateTimeParseContext context, CharSequence text, int position);
2163 }
2164
2165 //-----------------------------------------------------------------------
2166 /**
2167 * Composite printer and parser.
2168 */
2169 static final class CompositePrinterParser implements DateTimePrinterParser {
2170 private final DateTimePrinterParser[] printerParsers;
2171 private final boolean optional;
2172
2173 CompositePrinterParser(List<DateTimePrinterParser> printerParsers, boolean optional) {
2174 this(printerParsers.toArray(new DateTimePrinterParser[printerParsers.size()]), optional);
2175 }
2176
2177 CompositePrinterParser(DateTimePrinterParser[] printerParsers, boolean optional) {
2178 this.printerParsers = printerParsers;
2179 this.optional = optional;
2180 }
2181
2182 /**
2183 * Returns a copy of this printer-parser with the optional flag changed.
2184 *
2185 * @param optional the optional flag to set in the copy
2186 * @return the new printer-parser, not null
2187 */
2188 public CompositePrinterParser withOptional(boolean optional) {
2189 if (optional == this.optional) {
2190 return this;
2191 }
2192 return new CompositePrinterParser(printerParsers, optional);
2193 }
2194
2195 @Override
2196 public boolean format(DateTimePrintContext context, StringBuilder buf) {
2197 int length = buf.length();
2198 if (optional) {
2199 context.startOptional();
2200 }
2201 try {
2202 for (DateTimePrinterParser pp : printerParsers) {
2203 if (pp.format(context, buf) == false) {
2204 buf.setLength(length); // reset buffer
2205 return true;
2206 }
2207 }
2208 } finally {
2209 if (optional) {
2210 context.endOptional();
2211 }
2212 }
2213 return true;
2214 }
2215
2216 @Override
2217 public int parse(DateTimeParseContext context, CharSequence text, int position) {
2218 if (optional) {
2219 context.startOptional();
2220 int pos = position;
2221 for (DateTimePrinterParser pp : printerParsers) {
2222 pos = pp.parse(context, text, pos);
2223 if (pos < 0) {
2224 context.endOptional(false);
2225 return position; // return original position
2226 }
2227 }
2228 context.endOptional(true);
2229 return pos;
2230 } else {
2231 for (DateTimePrinterParser pp : printerParsers) {
2232 position = pp.parse(context, text, position);
2233 if (position < 0) {
2234 break;
2235 }
2236 }
2237 return position;
2238 }
2239 }
2240
2241 @Override
2242 public String toString() {
2243 StringBuilder buf = new StringBuilder();
2244 if (printerParsers != null) {
2245 buf.append(optional ? "[" : "(");
2246 for (DateTimePrinterParser pp : printerParsers) {
2247 buf.append(pp);
2248 }
2249 buf.append(optional ? "]" : ")");
2250 }
2251 return buf.toString();
2252 }
2253 }
2254
2255 //-----------------------------------------------------------------------
2256 /**
2257 * Pads the output to a fixed width.
2258 */
2259 static final class PadPrinterParserDecorator implements DateTimePrinterParser {
2260 private final DateTimePrinterParser printerParser;
2261 private final int padWidth;
2262 private final char padChar;
2263
2264 /**
2265 * Constructor.
2266 *
2267 * @param printerParser the printer, not null
2268 * @param padWidth the width to pad to, 1 or greater
2269 * @param padChar the pad character
2270 */
2271 PadPrinterParserDecorator(DateTimePrinterParser printerParser, int padWidth, char padChar) {
2272 // input checked by DateTimeFormatterBuilder
2273 this.printerParser = printerParser;
2274 this.padWidth = padWidth;
2275 this.padChar = padChar;
2276 }
2277
2278 @Override
2279 public boolean format(DateTimePrintContext context, StringBuilder buf) {
2280 int preLen = buf.length();
2281 if (printerParser.format(context, buf) == false) {
2282 return false;
2283 }
2284 int len = buf.length() - preLen;
2285 if (len > padWidth) {
2286 throw new DateTimeException(
2287 "Cannot print as output of " + len + " characters exceeds pad width of " + padWidth);
2288 }
2289 for (int i = 0; i < padWidth - len; i++) {
2290 buf.insert(preLen, padChar);
2291 }
2292 return true;
2293 }
2294
2295 @Override
2296 public int parse(DateTimeParseContext context, CharSequence text, int position) {
2297 // cache context before changed by decorated parser
2298 final boolean strict = context.isStrict();
2299 // parse
2300 if (position > text.length()) {
2301 throw new IndexOutOfBoundsException();
2302 }
2303 if (position == text.length()) {
2304 return ~position; // no more characters in the string
2305 }
2306 int endPos = position + padWidth;
2307 if (endPos > text.length()) {
2308 if (strict) {
2309 return ~position; // not enough characters in the string to meet the parse width
2310 }
2311 endPos = text.length();
2312 }
2313 int pos = position;
2314 while (pos < endPos && context.charEquals(text.charAt(pos), padChar)) {
2315 pos++;
2316 }
2317 text = text.subSequence(0, endPos);
2318 int resultPos = printerParser.parse(context, text, pos);
2319 if (resultPos != endPos && strict) {
2320 return ~(position + pos); // parse of decorated field didn't parse to the end
2321 }
2322 return resultPos;
2323 }
2324
2325 @Override
2326 public String toString() {
2327 return "Pad(" + printerParser + "," + padWidth + (padChar == ' ' ? ")" : ",'" + padChar + "')");
2328 }
2329 }
2330
2331 //-----------------------------------------------------------------------
2332 /**
2333 * Enumeration to apply simple parse settings.
2334 */
2335 static enum SettingsParser implements DateTimePrinterParser {
2336 SENSITIVE,
2337 INSENSITIVE,
2338 STRICT,
2339 LENIENT;
2340
2341 @Override
2342 public boolean format(DateTimePrintContext context, StringBuilder buf) {
2343 return true; // nothing to do here
2344 }
2345
2346 @Override
2347 public int parse(DateTimeParseContext context, CharSequence text, int position) {
2348 // using ordinals to avoid javac synthetic inner class
2349 switch (ordinal()) {
2350 case 0: context.setCaseSensitive(true); break;
2351 case 1: context.setCaseSensitive(false); break;
2352 case 2: context.setStrict(true); break;
2353 case 3: context.setStrict(false); break;
2354 }
2355 return position;
2356 }
2357
2358 @Override
2359 public String toString() {
2360 // using ordinals to avoid javac synthetic inner class
2361 switch (ordinal()) {
2362 case 0: return "ParseCaseSensitive(true)";
2363 case 1: return "ParseCaseSensitive(false)";
2364 case 2: return "ParseStrict(true)";
2365 case 3: return "ParseStrict(false)";
2366 }
2367 throw new IllegalStateException("Unreachable");
2368 }
2369 }
2370
2371 //-----------------------------------------------------------------------
2372 /**
2373 * Defaults a value into the parse if not currently present.
2374 */
2375 static class DefaultValueParser implements DateTimePrinterParser {
2376 private final TemporalField field;
2377 private final long value;
2378
2379 DefaultValueParser(TemporalField field, long value) {
2380 this.field = field;
2381 this.value = value;
2382 }
2383
2384 public boolean format(DateTimePrintContext context, StringBuilder buf) {
2385 return true;
2386 }
2387
2388 public int parse(DateTimeParseContext context, CharSequence text, int position) {
2389 if (context.getParsed(field) == null) {
2390 context.setParsedField(field, value, position, position);
2391 }
2392 return position;
2393 }
2394 }
2395
2396 //-----------------------------------------------------------------------
2397 /**
2398 * Prints or parses a character literal.
2399 */
2400 static final class CharLiteralPrinterParser implements DateTimePrinterParser {
2401 private final char literal;
2402
2403 CharLiteralPrinterParser(char literal) {
2404 this.literal = literal;
2405 }
2406
2407 @Override
2408 public boolean format(DateTimePrintContext context, StringBuilder buf) {
2409 buf.append(literal);
2410 return true;
2411 }
2412
2413 @Override
2414 public int parse(DateTimeParseContext context, CharSequence text, int position) {
2415 int length = text.length();
2416 if (position == length) {
2417 return ~position;
2418 }
2419 char ch = text.charAt(position);
2420 if (ch != literal) {
2421 if (context.isCaseSensitive() ||
2422 (Character.toUpperCase(ch) != Character.toUpperCase(literal) &&
2423 Character.toLowerCase(ch) != Character.toLowerCase(literal))) {
2424 return ~position;
2425 }
2426 }
2427 return position + 1;
2428 }
2429
2430 @Override
2431 public String toString() {
2432 if (literal == '\'') {
2433 return "''";
2434 }
2435 return "'" + literal + "'";
2436 }
2437 }
2438
2439 //-----------------------------------------------------------------------
2440 /**
2441 * Prints or parses a string literal.
2442 */
2443 static final class StringLiteralPrinterParser implements DateTimePrinterParser {
2444 private final String literal;
2445
2446 StringLiteralPrinterParser(String literal) {
2447 this.literal = literal; // validated by caller
2448 }
2449
2450 @Override
2451 public boolean format(DateTimePrintContext context, StringBuilder buf) {
2452 buf.append(literal);
2453 return true;
2454 }
2455
2456 @Override
2457 public int parse(DateTimeParseContext context, CharSequence text, int position) {
2458 int length = text.length();
2459 if (position > length || position < 0) {
2460 throw new IndexOutOfBoundsException();
2461 }
2462 if (context.subSequenceEquals(text, position, literal, 0, literal.length()) == false) {
2463 return ~position;
2464 }
2465 return position + literal.length();
2466 }
2467
2468 @Override
2469 public String toString() {
2470 String converted = literal.replace("'", "''");
2471 return "'" + converted + "'";
2472 }
2473 }
2474
2475 //-----------------------------------------------------------------------
2476 /**
2477 * Prints and parses a numeric date-time field with optional padding.
2478 */
2479 static class NumberPrinterParser implements DateTimePrinterParser {
2480
2481 /**
2482 * Array of 10 to the power of n.
2483 */
2484 static final long[] EXCEED_POINTS = new long[] {
2485 0L,
2486 10L,
2487 100L,
2488 1000L,
2489 10000L,
2490 100000L,
2491 1000000L,
2492 10000000L,
2493 100000000L,
2494 1000000000L,
2495 10000000000L,
2496 };
2497
2498 final TemporalField field;
2499 final int minWidth;
2500 final int maxWidth;
2501 private final SignStyle signStyle;
2502 final int subsequentWidth;
2503
2504 /**
2505 * Constructor.
2506 *
2507 * @param field the field to format, not null
2508 * @param minWidth the minimum field width, from 1 to 19
2509 * @param maxWidth the maximum field width, from minWidth to 19
2510 * @param signStyle the positive/negative sign style, not null
2511 */
2512 NumberPrinterParser(TemporalField field, int minWidth, int maxWidth, SignStyle signStyle) {
2513 // validated by caller
2514 this.field = field;
2515 this.minWidth = minWidth;
2516 this.maxWidth = maxWidth;
2517 this.signStyle = signStyle;
2518 this.subsequentWidth = 0;
2519 }
2520
2521 /**
2522 * Constructor.
2523 *
2524 * @param field the field to format, not null
2525 * @param minWidth the minimum field width, from 1 to 19
2526 * @param maxWidth the maximum field width, from minWidth to 19
2527 * @param signStyle the positive/negative sign style, not null
2528 * @param subsequentWidth the width of subsequent non-negative numbers, 0 or greater,
2529 * -1 if fixed width due to active adjacent parsing
2530 */
2531 protected NumberPrinterParser(TemporalField field, int minWidth, int maxWidth, SignStyle signStyle, int subsequentWidth) {
2532 // validated by caller
2533 this.field = field;
2534 this.minWidth = minWidth;
2535 this.maxWidth = maxWidth;
2536 this.signStyle = signStyle;
2537 this.subsequentWidth = subsequentWidth;
2538 }
2539
2540 /**
2541 * Returns a new instance with fixed width flag set.
2542 *
2543 * @return a new updated printer-parser, not null
2544 */
2545 NumberPrinterParser withFixedWidth() {
2546 if (subsequentWidth == -1) {
2547 return this;
2548 }
2549 return new NumberPrinterParser(field, minWidth, maxWidth, signStyle, -1);
2550 }
2551
2552 /**
2553 * Returns a new instance with an updated subsequent width.
2554 *
2555 * @param subsequentWidth the width of subsequent non-negative numbers, 0 or greater
2556 * @return a new updated printer-parser, not null
2557 */
2558 NumberPrinterParser withSubsequentWidth(int subsequentWidth) {
2559 return new NumberPrinterParser(field, minWidth, maxWidth, signStyle, this.subsequentWidth + subsequentWidth);
2560 }
2561
2562 @Override
2563 public boolean format(DateTimePrintContext context, StringBuilder buf) {
2564 Long valueLong = context.getValue(field);
2565 if (valueLong == null) {
2566 return false;
2567 }
2568 long value = getValue(context, valueLong);
2569 DecimalStyle decimalStyle = context.getDecimalStyle();
2570 String str = (value == Long.MIN_VALUE ? "9223372036854775808" : Long.toString(Math.abs(value)));
2571 if (str.length() > maxWidth) {
2572 throw new DateTimeException("Field " + field +
2573 " cannot be printed as the value " + value +
2574 " exceeds the maximum print width of " + maxWidth);
2575 }
2576 str = decimalStyle.convertNumberToI18N(str);
2577
2578 if (value >= 0) {
2579 switch (signStyle) {
2580 case EXCEEDS_PAD:
2581 if (minWidth < 19 && value >= EXCEED_POINTS[minWidth]) {
2582 buf.append(decimalStyle.getPositiveSign());
2583 }
2584 break;
2585 case ALWAYS:
2586 buf.append(decimalStyle.getPositiveSign());
2587 break;
2588 }
2589 } else {
2590 switch (signStyle) {
2591 case NORMAL:
2592 case EXCEEDS_PAD:
2593 case ALWAYS:
2594 buf.append(decimalStyle.getNegativeSign());
2595 break;
2596 case NOT_NEGATIVE:
2597 throw new DateTimeException("Field " + field +
2598 " cannot be printed as the value " + value +
2599 " cannot be negative according to the SignStyle");
2600 }
2601 }
2602 for (int i = 0; i < minWidth - str.length(); i++) {
2603 buf.append(decimalStyle.getZeroDigit());
2604 }
2605 buf.append(str);
2606 return true;
2607 }
2608
2609 /**
2610 * Gets the value to output.
2611 *
2612 * @param context the context
2613 * @param value the value of the field, not null
2614 * @return the value
2615 */
2616 long getValue(DateTimePrintContext context, long value) {
2617 return value;
2618 }
2619
2620 /**
2621 * For NumberPrinterParser, the width is fixed depending on the
2622 * minWidth, maxWidth, signStyle and whether subsequent fields are fixed.
2623 * @param context the context
2624 * @return true if the field is fixed width
2625 * @see DateTimeFormatterBuilder#appendValue(java.time.temporal.TemporalField, int)
2626 */
2627 boolean isFixedWidth(DateTimeParseContext context) {
2628 return subsequentWidth == -1 ||
2629 (subsequentWidth > 0 && minWidth == maxWidth && signStyle == SignStyle.NOT_NEGATIVE);
2630 }
2631
2632 @Override
2633 public int parse(DateTimeParseContext context, CharSequence text, int position) {
2634 int length = text.length();
2635 if (position == length) {
2636 return ~position;
2637 }
2638 char sign = text.charAt(position); // IOOBE if invalid position
2639 boolean negative = false;
2640 boolean positive = false;
2641 if (sign == context.getDecimalStyle().getPositiveSign()) {
2642 if (signStyle.parse(true, context.isStrict(), minWidth == maxWidth) == false) {
2643 return ~position;
2644 }
2645 positive = true;
2646 position++;
2647 } else if (sign == context.getDecimalStyle().getNegativeSign()) {
2648 if (signStyle.parse(false, context.isStrict(), minWidth == maxWidth) == false) {
2649 return ~position;
2650 }
2651 negative = true;
2652 position++;
2653 } else {
2654 if (signStyle == SignStyle.ALWAYS && context.isStrict()) {
2655 return ~position;
2656 }
2657 }
2658 int effMinWidth = (context.isStrict() || isFixedWidth(context) ? minWidth : 1);
2659 int minEndPos = position + effMinWidth;
2660 if (minEndPos > length) {
2661 return ~position;
2662 }
2663 int effMaxWidth = (context.isStrict() || isFixedWidth(context) ? maxWidth : 9) + Math.max(subsequentWidth, 0);
2664 long total = 0;
2665 BigInteger totalBig = null;
2666 int pos = position;
2667 for (int pass = 0; pass < 2; pass++) {
2668 int maxEndPos = Math.min(pos + effMaxWidth, length);
2669 while (pos < maxEndPos) {
2670 char ch = text.charAt(pos++);
2671 int digit = context.getDecimalStyle().convertToDigit(ch);
2672 if (digit < 0) {
2673 pos--;
2674 if (pos < minEndPos) {
2675 return ~position; // need at least min width digits
2676 }
2677 break;
2678 }
2679 if ((pos - position) > 18) {
2680 if (totalBig == null) {
2681 totalBig = BigInteger.valueOf(total);
2682 }
2683 totalBig = totalBig.multiply(BigInteger.TEN).add(BigInteger.valueOf(digit));
2684 } else {
2685 total = total * 10 + digit;
2686 }
2687 }
2688 if (subsequentWidth > 0 && pass == 0) {
2689 // re-parse now we know the correct width
2690 int parseLen = pos - position;
2691 effMaxWidth = Math.max(effMinWidth, parseLen - subsequentWidth);
2692 pos = position;
2693 total = 0;
2694 totalBig = null;
2695 } else {
2696 break;
2697 }
2698 }
2699 if (negative) {
2700 if (totalBig != null) {
2701 if (totalBig.equals(BigInteger.ZERO) && context.isStrict()) {
2702 return ~(position - 1); // minus zero not allowed
2703 }
2704 totalBig = totalBig.negate();
2705 } else {
2706 if (total == 0 && context.isStrict()) {
2707 return ~(position - 1); // minus zero not allowed
2708 }
2709 total = -total;
2710 }
2711 } else if (signStyle == SignStyle.EXCEEDS_PAD && context.isStrict()) {
2712 int parseLen = pos - position;
2713 if (positive) {
2714 if (parseLen <= minWidth) {
2715 return ~(position - 1); // '+' only parsed if minWidth exceeded
2716 }
2717 } else {
2718 if (parseLen > minWidth) {
2719 return ~position; // '+' must be parsed if minWidth exceeded
2720 }
2721 }
2722 }
2723 if (totalBig != null) {
2724 if (totalBig.bitLength() > 63) {
2725 // overflow, parse 1 less digit
2726 totalBig = totalBig.divide(BigInteger.TEN);
2727 pos--;
2728 }
2729 return setValue(context, totalBig.longValue(), position, pos);
2730 }
2731 return setValue(context, total, position, pos);
2732 }
2733
2734 /**
2735 * Stores the value.
2736 *
2737 * @param context the context to store into, not null
2738 * @param value the value
2739 * @param errorPos the position of the field being parsed
2740 * @param successPos the position after the field being parsed
2741 * @return the new position
2742 */
2743 int setValue(DateTimeParseContext context, long value, int errorPos, int successPos) {
2744 return context.setParsedField(field, value, errorPos, successPos);
2745 }
2746
2747 @Override
2748 public String toString() {
2749 if (minWidth == 1 && maxWidth == 19 && signStyle == SignStyle.NORMAL) {
2750 return "Value(" + field + ")";
2751 }
2752 if (minWidth == maxWidth && signStyle == SignStyle.NOT_NEGATIVE) {
2753 return "Value(" + field + "," + minWidth + ")";
2754 }
2755 return "Value(" + field + "," + minWidth + "," + maxWidth + "," + signStyle + ")";
2756 }
2757 }
2758
2759 //-----------------------------------------------------------------------
2760 /**
2761 * Prints and parses a reduced numeric date-time field.
2762 */
2763 static final class ReducedPrinterParser extends NumberPrinterParser {
2764 /**
2765 * The base date for reduced value parsing.
2766 */
2767 static final LocalDate BASE_DATE = LocalDate.of(2000, 1, 1);
2768
2769 private final int baseValue;
2770 private final ChronoLocalDate baseDate;
2771
2772 /**
2773 * Constructor.
2774 *
2775 * @param field the field to format, validated not null
2776 * @param minWidth the minimum field width, from 1 to 10
2777 * @param maxWidth the maximum field width, from 1 to 10
2778 * @param baseValue the base value
2779 * @param baseDate the base date
2780 */
2781 ReducedPrinterParser(TemporalField field, int minWidth, int maxWidth,
2782 int baseValue, ChronoLocalDate baseDate) {
2783 this(field, minWidth, maxWidth, baseValue, baseDate, 0);
2784 if (minWidth < 1 || minWidth > 10) {
2785 throw new IllegalArgumentException("The minWidth must be from 1 to 10 inclusive but was " + minWidth);
2786 }
2787 if (maxWidth < 1 || maxWidth > 10) {
2788 throw new IllegalArgumentException("The maxWidth must be from 1 to 10 inclusive but was " + minWidth);
2789 }
2790 if (maxWidth < minWidth) {
2791 throw new IllegalArgumentException("Maximum width must exceed or equal the minimum width but " +
2792 maxWidth + " < " + minWidth);
2793 }
2794 if (baseDate == null) {
2795 if (field.range().isValidValue(baseValue) == false) {
2796 throw new IllegalArgumentException("The base value must be within the range of the field");
2797 }
2798 if ((((long) baseValue) + EXCEED_POINTS[maxWidth]) > Integer.MAX_VALUE) {
2799 throw new DateTimeException("Unable to add printer-parser as the range exceeds the capacity of an int");
2800 }
2801 }
2802 }
2803
2804 /**
2805 * Constructor.
2806 * The arguments have already been checked.
2807 *
2808 * @param field the field to format, validated not null
2809 * @param minWidth the minimum field width, from 1 to 10
2810 * @param maxWidth the maximum field width, from 1 to 10
2811 * @param baseValue the base value
2812 * @param baseDate the base date
2813 * @param subsequentWidth the subsequentWidth for this instance
2814 */
2815 private ReducedPrinterParser(TemporalField field, int minWidth, int maxWidth,
2816 int baseValue, ChronoLocalDate baseDate, int subsequentWidth) {
2817 super(field, minWidth, maxWidth, SignStyle.NOT_NEGATIVE, subsequentWidth);
2818 this.baseValue = baseValue;
2819 this.baseDate = baseDate;
2820 }
2821
2822 @Override
2823 long getValue(DateTimePrintContext context, long value) {
2824 long absValue = Math.abs(value);
2825 int baseValue = this.baseValue;
2826 if (baseDate != null) {
2827 Chronology chrono = Chronology.from(context.getTemporal());
2828 baseValue = chrono.date(baseDate).get(field);
2829 }
2830 if (value >= baseValue && value < baseValue + EXCEED_POINTS[minWidth]) {
2831 // Use the reduced value if it fits in minWidth
2832 return absValue % EXCEED_POINTS[minWidth];
2833 }
2834 // Otherwise truncate to fit in maxWidth
2835 return absValue % EXCEED_POINTS[maxWidth];
2836 }
2837
2838 @Override
2839 int setValue(DateTimeParseContext context, long value, int errorPos, int successPos) {
2840 int baseValue = this.baseValue;
2841 if (baseDate != null) {
2842 Chronology chrono = context.getEffectiveChronology();
2843 baseValue = chrono.date(baseDate).get(field);
2844
2845 // In case the Chronology is changed later, add a callback when/if it changes
2846 final long initialValue = value;
2847 context.addChronoChangedListener(
2848 (_unused) -> {
2849 /* Repeat the set of the field using the current Chronology
2850 * The success/error position is ignored because the value is
2851 * intentionally being overwritten.
2852 */
2853 setValue(context, initialValue, errorPos, successPos);
2854 });
2855 }
2856 int parseLen = successPos - errorPos;
2857 if (parseLen == minWidth && value >= 0) {
2858 long range = EXCEED_POINTS[minWidth];
2859 long lastPart = baseValue % range;
2860 long basePart = baseValue - lastPart;
2861 if (baseValue > 0) {
2862 value = basePart + value;
2863 } else {
2864 value = basePart - value;
2865 }
2866 if (value < baseValue) {
2867 value += range;
2868 }
2869 }
2870 return context.setParsedField(field, value, errorPos, successPos);
2871 }
2872
2873 /**
2874 * Returns a new instance with fixed width flag set.
2875 *
2876 * @return a new updated printer-parser, not null
2877 */
2878 @Override
2879 ReducedPrinterParser withFixedWidth() {
2880 if (subsequentWidth == -1) {
2881 return this;
2882 }
2883 return new ReducedPrinterParser(field, minWidth, maxWidth, baseValue, baseDate, -1);
2884 }
2885
2886 /**
2887 * Returns a new instance with an updated subsequent width.
2888 *
2889 * @param subsequentWidth the width of subsequent non-negative numbers, 0 or greater
2890 * @return a new updated printer-parser, not null
2891 */
2892 @Override
2893 ReducedPrinterParser withSubsequentWidth(int subsequentWidth) {
2894 return new ReducedPrinterParser(field, minWidth, maxWidth, baseValue, baseDate,
2895 this.subsequentWidth + subsequentWidth);
2896 }
2897
2898 /**
2899 * For a ReducedPrinterParser, fixed width is false if the mode is strict,
2900 * otherwise it is set as for NumberPrinterParser.
2901 * @param context the context
2902 * @return if the field is fixed width
2903 * @see DateTimeFormatterBuilder#appendValueReduced(java.time.temporal.TemporalField, int, int, int)
2904 */
2905 @Override
2906 boolean isFixedWidth(DateTimeParseContext context) {
2907 if (context.isStrict() == false) {
2908 return false;
2909 }
2910 return super.isFixedWidth(context);
2911 }
2912
2913 @Override
2914 public String toString() {
2915 return "ReducedValue(" + field + "," + minWidth + "," + maxWidth +
2916 "," + Objects.requireNonNullElse(baseDate, baseValue) + ")";
2917 }
2918 }
2919
2920 //-----------------------------------------------------------------------
2921 /**
2922 * Prints and parses a numeric date-time field with optional padding.
2923 */
2924 static final class FractionPrinterParser implements DateTimePrinterParser {
2925 private final TemporalField field;
2926 private final int minWidth;
2927 private final int maxWidth;
2928 private final boolean decimalPoint;
2929
2930 /**
2931 * Constructor.
2932 *
2933 * @param field the field to output, not null
2934 * @param minWidth the minimum width to output, from 0 to 9
2935 * @param maxWidth the maximum width to output, from 0 to 9
2936 * @param decimalPoint whether to output the localized decimal point symbol
2937 */
2938 FractionPrinterParser(TemporalField field, int minWidth, int maxWidth, boolean decimalPoint) {
2939 Objects.requireNonNull(field, "field");
2940 if (field.range().isFixed() == false) {
2941 throw new IllegalArgumentException("Field must have a fixed set of values: " + field);
2942 }
2943 if (minWidth < 0 || minWidth > 9) {
2944 throw new IllegalArgumentException("Minimum width must be from 0 to 9 inclusive but was " + minWidth);
2945 }
2946 if (maxWidth < 1 || maxWidth > 9) {
2947 throw new IllegalArgumentException("Maximum width must be from 1 to 9 inclusive but was " + maxWidth);
2948 }
2949 if (maxWidth < minWidth) {
2950 throw new IllegalArgumentException("Maximum width must exceed or equal the minimum width but " +
2951 maxWidth + " < " + minWidth);
2952 }
2953 this.field = field;
2954 this.minWidth = minWidth;
2955 this.maxWidth = maxWidth;
2956 this.decimalPoint = decimalPoint;
2957 }
2958
2959 @Override
2960 public boolean format(DateTimePrintContext context, StringBuilder buf) {
2961 Long value = context.getValue(field);
2962 if (value == null) {
2963 return false;
2964 }
2965 DecimalStyle decimalStyle = context.getDecimalStyle();
2966 BigDecimal fraction = convertToFraction(value);
2967 if (fraction.scale() == 0) { // scale is zero if value is zero
2968 if (minWidth > 0) {
2969 if (decimalPoint) {
2970 buf.append(decimalStyle.getDecimalSeparator());
2971 }
2972 for (int i = 0; i < minWidth; i++) {
2973 buf.append(decimalStyle.getZeroDigit());
2974 }
2975 }
2976 } else {
2977 int outputScale = Math.min(Math.max(fraction.scale(), minWidth), maxWidth);
2978 fraction = fraction.setScale(outputScale, RoundingMode.FLOOR);
2979 String str = fraction.toPlainString().substring(2);
2980 str = decimalStyle.convertNumberToI18N(str);
2981 if (decimalPoint) {
2982 buf.append(decimalStyle.getDecimalSeparator());
2983 }
2984 buf.append(str);
2985 }
2986 return true;
2987 }
2988
2989 @Override
2990 public int parse(DateTimeParseContext context, CharSequence text, int position) {
2991 int effectiveMin = (context.isStrict() ? minWidth : 0);
2992 int effectiveMax = (context.isStrict() ? maxWidth : 9);
2993 int length = text.length();
2994 if (position == length) {
2995 // valid if whole field is optional, invalid if minimum width
2996 return (effectiveMin > 0 ? ~position : position);
2997 }
2998 if (decimalPoint) {
2999 if (text.charAt(position) != context.getDecimalStyle().getDecimalSeparator()) {
3000 // valid if whole field is optional, invalid if minimum width
3001 return (effectiveMin > 0 ? ~position : position);
3002 }
3003 position++;
3004 }
3005 int minEndPos = position + effectiveMin;
3006 if (minEndPos > length) {
3007 return ~position; // need at least min width digits
3008 }
3009 int maxEndPos = Math.min(position + effectiveMax, length);
3010 int total = 0; // can use int because we are only parsing up to 9 digits
3011 int pos = position;
3012 while (pos < maxEndPos) {
3013 char ch = text.charAt(pos++);
3014 int digit = context.getDecimalStyle().convertToDigit(ch);
3015 if (digit < 0) {
3016 if (pos < minEndPos) {
3017 return ~position; // need at least min width digits
3018 }
3019 pos--;
3020 break;
3021 }
3022 total = total * 10 + digit;
3023 }
3024 BigDecimal fraction = new BigDecimal(total).movePointLeft(pos - position);
3025 long value = convertFromFraction(fraction);
3026 return context.setParsedField(field, value, position, pos);
3027 }
3028
3029 /**
3030 * Converts a value for this field to a fraction between 0 and 1.
3031 * <p>
3032 * The fractional value is between 0 (inclusive) and 1 (exclusive).
3033 * It can only be returned if the {@link java.time.temporal.TemporalField#range() value range} is fixed.
3034 * The fraction is obtained by calculation from the field range using 9 decimal
3035 * places and a rounding mode of {@link RoundingMode#FLOOR FLOOR}.
3036 * The calculation is inaccurate if the values do not run continuously from smallest to largest.
3037 * <p>
3038 * For example, the second-of-minute value of 15 would be returned as 0.25,
3039 * assuming the standard definition of 60 seconds in a minute.
3040 *
3041 * @param value the value to convert, must be valid for this rule
3042 * @return the value as a fraction within the range, from 0 to 1, not null
3043 * @throws DateTimeException if the value cannot be converted to a fraction
3044 */
3045 private BigDecimal convertToFraction(long value) {
3046 ValueRange range = field.range();
3047 range.checkValidValue(value, field);
3048 BigDecimal minBD = BigDecimal.valueOf(range.getMinimum());
3049 BigDecimal rangeBD = BigDecimal.valueOf(range.getMaximum()).subtract(minBD).add(BigDecimal.ONE);
3050 BigDecimal valueBD = BigDecimal.valueOf(value).subtract(minBD);
3051 BigDecimal fraction = valueBD.divide(rangeBD, 9, RoundingMode.FLOOR);
3052 // stripTrailingZeros bug
3053 return fraction.compareTo(BigDecimal.ZERO) == 0 ? BigDecimal.ZERO : fraction.stripTrailingZeros();
3054 }
3055
3056 /**
3057 * Converts a fraction from 0 to 1 for this field to a value.
3058 * <p>
3059 * The fractional value must be between 0 (inclusive) and 1 (exclusive).
3060 * It can only be returned if the {@link java.time.temporal.TemporalField#range() value range} is fixed.
3061 * The value is obtained by calculation from the field range and a rounding
3062 * mode of {@link RoundingMode#FLOOR FLOOR}.
3063 * The calculation is inaccurate if the values do not run continuously from smallest to largest.
3064 * <p>
3065 * For example, the fractional second-of-minute of 0.25 would be converted to 15,
3066 * assuming the standard definition of 60 seconds in a minute.
3067 *
3068 * @param fraction the fraction to convert, not null
3069 * @return the value of the field, valid for this rule
3070 * @throws DateTimeException if the value cannot be converted
3071 */
3072 private long convertFromFraction(BigDecimal fraction) {
3073 ValueRange range = field.range();
3074 BigDecimal minBD = BigDecimal.valueOf(range.getMinimum());
3075 BigDecimal rangeBD = BigDecimal.valueOf(range.getMaximum()).subtract(minBD).add(BigDecimal.ONE);
3076 BigDecimal valueBD = fraction.multiply(rangeBD).setScale(0, RoundingMode.FLOOR).add(minBD);
3077 return valueBD.longValueExact();
3078 }
3079
3080 @Override
3081 public String toString() {
3082 String decimal = (decimalPoint ? ",DecimalPoint" : "");
3083 return "Fraction(" + field + "," + minWidth + "," + maxWidth + decimal + ")";
3084 }
3085 }
3086
3087 //-----------------------------------------------------------------------
3088 /**
3089 * Prints or parses field text.
3090 */
3091 static final class TextPrinterParser implements DateTimePrinterParser {
3092 private final TemporalField field;
3093 private final TextStyle textStyle;
3094 private final DateTimeTextProvider provider;
3095 /**
3096 * The cached number printer parser.
3097 * Immutable and volatile, so no synchronization needed.
3098 */
3099 private volatile NumberPrinterParser numberPrinterParser;
3100
3101 /**
3102 * Constructor.
3103 *
3104 * @param field the field to output, not null
3105 * @param textStyle the text style, not null
3106 * @param provider the text provider, not null
3107 */
3108 TextPrinterParser(TemporalField field, TextStyle textStyle, DateTimeTextProvider provider) {
3109 // validated by caller
3110 this.field = field;
3111 this.textStyle = textStyle;
3112 this.provider = provider;
3113 }
3114
3115 @Override
3116 public boolean format(DateTimePrintContext context, StringBuilder buf) {
3117 Long value = context.getValue(field);
3118 if (value == null) {
3119 return false;
3120 }
3121 String text;
3122 Chronology chrono = context.getTemporal().query(TemporalQueries.chronology());
3123 if (chrono == null || chrono == IsoChronology.INSTANCE) {
3124 text = provider.getText(field, value, textStyle, context.getLocale());
3125 } else {
3126 text = provider.getText(chrono, field, value, textStyle, context.getLocale());
3127 }
3128 if (text == null) {
3129 return numberPrinterParser().format(context, buf);
3130 }
3131 buf.append(text);
3132 return true;
3133 }
3134
3135 @Override
3136 public int parse(DateTimeParseContext context, CharSequence parseText, int position) {
3137 int length = parseText.length();
3138 if (position < 0 || position > length) {
3139 throw new IndexOutOfBoundsException();
3140 }
3141 TextStyle style = (context.isStrict() ? textStyle : null);
3142 Chronology chrono = context.getEffectiveChronology();
3143 Iterator<Entry<String, Long>> it;
3144 if (chrono == null || chrono == IsoChronology.INSTANCE) {
3145 it = provider.getTextIterator(field, style, context.getLocale());
3146 } else {
3147 it = provider.getTextIterator(chrono, field, style, context.getLocale());
3148 }
3149 if (it != null) {
3150 while (it.hasNext()) {
3151 Entry<String, Long> entry = it.next();
3152 String itText = entry.getKey();
3153 if (context.subSequenceEquals(itText, 0, parseText, position, itText.length())) {
3154 return context.setParsedField(field, entry.getValue(), position, position + itText.length());
3155 }
3156 }
3157 if (field == ERA && !context.isStrict()) {
3158 // parse the possible era name from era.toString()
3159 List<Era> eras = chrono.eras();
3160 for (Era era : eras) {
3161 String name = era.toString();
3162 if (context.subSequenceEquals(name, 0, parseText, position, name.length())) {
3163 return context.setParsedField(field, era.getValue(), position, position + name.length());
3164 }
3165 }
3166 }
3167 if (context.isStrict()) {
3168 return ~position;
3169 }
3170 }
3171 return numberPrinterParser().parse(context, parseText, position);
3172 }
3173
3174 /**
3175 * Create and cache a number printer parser.
3176 * @return the number printer parser for this field, not null
3177 */
3178 private NumberPrinterParser numberPrinterParser() {
3179 if (numberPrinterParser == null) {
3180 numberPrinterParser = new NumberPrinterParser(field, 1, 19, SignStyle.NORMAL);
3181 }
3182 return numberPrinterParser;
3183 }
3184
3185 @Override
3186 public String toString() {
3187 if (textStyle == TextStyle.FULL) {
3188 return "Text(" + field + ")";
3189 }
3190 return "Text(" + field + "," + textStyle + ")";
3191 }
3192 }
3193
3194 //-----------------------------------------------------------------------
3195 /**
3196 * Prints or parses an ISO-8601 instant.
3197 */
3198 static final class InstantPrinterParser implements DateTimePrinterParser {
3199 // days in a 400 year cycle = 146097
3200 // days in a 10,000 year cycle = 146097 * 25
3201 // seconds per day = 86400
3202 private static final long SECONDS_PER_10000_YEARS = 146097L * 25L * 86400L;
3203 private static final long SECONDS_0000_TO_1970 = ((146097L * 5L) - (30L * 365L + 7L)) * 86400L;
3204 private final int fractionalDigits;
3205
3206 InstantPrinterParser(int fractionalDigits) {
3207 this.fractionalDigits = fractionalDigits;
3208 }
3209
3210 @Override
3211 public boolean format(DateTimePrintContext context, StringBuilder buf) {
3212 // use INSTANT_SECONDS, thus this code is not bound by Instant.MAX
3213 Long inSecs = context.getValue(INSTANT_SECONDS);
3214 Long inNanos = null;
3215 if (context.getTemporal().isSupported(NANO_OF_SECOND)) {
3216 inNanos = context.getTemporal().getLong(NANO_OF_SECOND);
3217 }
3218 if (inSecs == null) {
3219 return false;
3220 }
3221 long inSec = inSecs;
3222 int inNano = NANO_OF_SECOND.checkValidIntValue(inNanos != null ? inNanos : 0);
3223 // format mostly using LocalDateTime.toString
3224 if (inSec >= -SECONDS_0000_TO_1970) {
3225 // current era
3226 long zeroSecs = inSec - SECONDS_PER_10000_YEARS + SECONDS_0000_TO_1970;
3227 long hi = Math.floorDiv(zeroSecs, SECONDS_PER_10000_YEARS) + 1;
3228 long lo = Math.floorMod(zeroSecs, SECONDS_PER_10000_YEARS);
3229 LocalDateTime ldt = LocalDateTime.ofEpochSecond(lo - SECONDS_0000_TO_1970, 0, ZoneOffset.UTC);
3230 if (hi > 0) {
3231 buf.append('+').append(hi);
3232 }
3233 buf.append(ldt);
3234 if (ldt.getSecond() == 0) {
3235 buf.append(":00");
3236 }
3237 } else {
3238 // before current era
3239 long zeroSecs = inSec + SECONDS_0000_TO_1970;
3240 long hi = zeroSecs / SECONDS_PER_10000_YEARS;
3241 long lo = zeroSecs % SECONDS_PER_10000_YEARS;
3242 LocalDateTime ldt = LocalDateTime.ofEpochSecond(lo - SECONDS_0000_TO_1970, 0, ZoneOffset.UTC);
3243 int pos = buf.length();
3244 buf.append(ldt);
3245 if (ldt.getSecond() == 0) {
3246 buf.append(":00");
3247 }
3248 if (hi < 0) {
3249 if (ldt.getYear() == -10_000) {
3250 buf.replace(pos, pos + 2, Long.toString(hi - 1));
3251 } else if (lo == 0) {
3252 buf.insert(pos, hi);
3253 } else {
3254 buf.insert(pos + 1, Math.abs(hi));
3255 }
3256 }
3257 }
3258 // add fraction
3259 if ((fractionalDigits < 0 && inNano > 0) || fractionalDigits > 0) {
3260 buf.append('.');
3261 int div = 100_000_000;
3262 for (int i = 0; ((fractionalDigits == -1 && inNano > 0) ||
3263 (fractionalDigits == -2 && (inNano > 0 || (i % 3) != 0)) ||
3264 i < fractionalDigits); i++) {
3265 int digit = inNano / div;
3266 buf.append((char) (digit + '0'));
3267 inNano = inNano - (digit * div);
3268 div = div / 10;
3269 }
3270 }
3271 buf.append('Z');
3272 return true;
3273 }
3274
3275 @Override
3276 public int parse(DateTimeParseContext context, CharSequence text, int position) {
3277 // new context to avoid overwriting fields like year/month/day
3278 int minDigits = (fractionalDigits < 0 ? 0 : fractionalDigits);
3279 int maxDigits = (fractionalDigits < 0 ? 9 : fractionalDigits);
3280 CompositePrinterParser parser = new DateTimeFormatterBuilder()
3281 .append(DateTimeFormatter.ISO_LOCAL_DATE).appendLiteral('T')
3282 .appendValue(HOUR_OF_DAY, 2).appendLiteral(':')
3283 .appendValue(MINUTE_OF_HOUR, 2).appendLiteral(':')
3284 .appendValue(SECOND_OF_MINUTE, 2)
3285 .appendFraction(NANO_OF_SECOND, minDigits, maxDigits, true)
3286 .appendLiteral('Z')
3287 .toFormatter().toPrinterParser(false);
3288 DateTimeParseContext newContext = context.copy();
3289 int pos = parser.parse(newContext, text, position);
3290 if (pos < 0) {
3291 return pos;
3292 }
3293 // parser restricts most fields to 2 digits, so definitely int
3294 // correctly parsed nano is also guaranteed to be valid
3295 long yearParsed = newContext.getParsed(YEAR);
3296 int month = newContext.getParsed(MONTH_OF_YEAR).intValue();
3297 int day = newContext.getParsed(DAY_OF_MONTH).intValue();
3298 int hour = newContext.getParsed(HOUR_OF_DAY).intValue();
3299 int min = newContext.getParsed(MINUTE_OF_HOUR).intValue();
3300 Long secVal = newContext.getParsed(SECOND_OF_MINUTE);
3301 Long nanoVal = newContext.getParsed(NANO_OF_SECOND);
3302 int sec = (secVal != null ? secVal.intValue() : 0);
3303 int nano = (nanoVal != null ? nanoVal.intValue() : 0);
3304 int days = 0;
3305 if (hour == 24 && min == 0 && sec == 0 && nano == 0) {
3306 hour = 0;
3307 days = 1;
3308 } else if (hour == 23 && min == 59 && sec == 60) {
3309 context.setParsedLeapSecond();
3310 sec = 59;
3311 }
3312 int year = (int) yearParsed % 10_000;
3313 long instantSecs;
3314 try {
3315 LocalDateTime ldt = LocalDateTime.of(year, month, day, hour, min, sec, 0).plusDays(days);
3316 instantSecs = ldt.toEpochSecond(ZoneOffset.UTC);
3317 instantSecs += Math.multiplyExact(yearParsed / 10_000L, SECONDS_PER_10000_YEARS);
3318 } catch (RuntimeException ex) {
3319 return ~position;
3320 }
3321 int successPos = pos;
3322 successPos = context.setParsedField(INSTANT_SECONDS, instantSecs, position, successPos);
3323 return context.setParsedField(NANO_OF_SECOND, nano, position, successPos);
3324 }
3325
3326 @Override
3327 public String toString() {
3328 return "Instant()";
3329 }
3330 }
3331
3332 //-----------------------------------------------------------------------
3333 /**
3334 * Prints or parses an offset ID.
3335 */
3336 static final class OffsetIdPrinterParser implements DateTimePrinterParser {
3337 static final String[] PATTERNS = new String[] {
3338 "+HH", "+HHmm", "+HH:mm", "+HHMM", "+HH:MM", "+HHMMss", "+HH:MM:ss", "+HHMMSS", "+HH:MM:SS", "+HHmmss", "+HH:mm:ss",
3339 }; // order used in pattern builder
3340 static final OffsetIdPrinterParser INSTANCE_ID_Z = new OffsetIdPrinterParser("+HH:MM:ss", "Z");
3341 static final OffsetIdPrinterParser INSTANCE_ID_ZERO = new OffsetIdPrinterParser("+HH:MM:ss", "0");
3342
3343 private final String noOffsetText;
3344 private final int type;
3345
3346 /**
3347 * Constructor.
3348 *
3349 * @param pattern the pattern
3350 * @param noOffsetText the text to use for UTC, not null
3351 */
3352 OffsetIdPrinterParser(String pattern, String noOffsetText) {
3353 Objects.requireNonNull(pattern, "pattern");
3354 Objects.requireNonNull(noOffsetText, "noOffsetText");
3355 this.type = checkPattern(pattern);
3356 this.noOffsetText = noOffsetText;
3357 }
3358
3359 private int checkPattern(String pattern) {
3360 for (int i = 0; i < PATTERNS.length; i++) {
3361 if (PATTERNS[i].equals(pattern)) {
3362 return i;
3363 }
3364 }
3365 throw new IllegalArgumentException("Invalid zone offset pattern: " + pattern);
3366 }
3367
3368 @Override
3369 public boolean format(DateTimePrintContext context, StringBuilder buf) {
3370 Long offsetSecs = context.getValue(OFFSET_SECONDS);
3371 if (offsetSecs == null) {
3372 return false;
3373 }
3374 int totalSecs = Math.toIntExact(offsetSecs);
3375 if (totalSecs == 0) {
3376 buf.append(noOffsetText);
3377 } else {
3378 int absHours = Math.abs((totalSecs / 3600) % 100); // anything larger than 99 silently dropped
3379 int absMinutes = Math.abs((totalSecs / 60) % 60);
3380 int absSeconds = Math.abs(totalSecs % 60);
3381 int bufPos = buf.length();
3382 int output = absHours;
3383 buf.append(totalSecs < 0 ? "-" : "+")
3384 .append((char) (absHours / 10 + '0')).append((char) (absHours % 10 + '0'));
3385 if ((type >= 3 && type < 9) || (type >= 9 && absSeconds > 0) || (type >= 1 && absMinutes > 0)) {
3386 buf.append((type % 2) == 0 ? ":" : "")
3387 .append((char) (absMinutes / 10 + '0')).append((char) (absMinutes % 10 + '0'));
3388 output += absMinutes;
3389 if (type == 7 || type == 8 || (type >= 5 && absSeconds > 0)) {
3390 buf.append((type % 2) == 0 ? ":" : "")
3391 .append((char) (absSeconds / 10 + '0')).append((char) (absSeconds % 10 + '0'));
3392 output += absSeconds;
3393 }
3394 }
3395 if (output == 0) {
3396 buf.setLength(bufPos);
3397 buf.append(noOffsetText);
3398 }
3399 }
3400 return true;
3401 }
3402
3403 @Override
3404 public int parse(DateTimeParseContext context, CharSequence text, int position) {
3405 int length = text.length();
3406 int noOffsetLen = noOffsetText.length();
3407 int parseType = type;
3408 if (context.isStrict() == false) {
3409 if ((parseType > 0 && (parseType % 2) == 0) ||
3410 (parseType == 0 && length > position + 3 && text.charAt(position + 3) == ':')) {
3411 parseType = 10;
3412 } else {
3413 parseType = 9;
3414 }
3415 }
3416 if (noOffsetLen == 0) {
3417 if (position == length) {
3418 return context.setParsedField(OFFSET_SECONDS, 0, position, position);
3419 }
3420 } else {
3421 if (position == length) {
3422 return ~position;
3423 }
3424 if (context.subSequenceEquals(text, position, noOffsetText, 0, noOffsetLen)) {
3425 return context.setParsedField(OFFSET_SECONDS, 0, position, position + noOffsetLen);
3426 }
3427 }
3428
3429 // parse normal plus/minus offset
3430 char sign = text.charAt(position); // IOOBE if invalid position
3431 if (sign == '+' || sign == '-') {
3432 // starts
3433 int negative = (sign == '-' ? -1 : 1);
3434 int[] array = new int[4];
3435 array[0] = position + 1;
3436 if ((parseNumber(array, 1, text, true, parseType) ||
3437 parseNumber(array, 2, text, parseType >= 3 && parseType < 9, parseType) ||
3438 parseNumber(array, 3, text, parseType == 7 || parseType == 8, parseType)) == false) {
3439 // success
3440 long offsetSecs = negative * (array[1] * 3600L + array[2] * 60L + array[3]);
3441 return context.setParsedField(OFFSET_SECONDS, offsetSecs, position, array[0]);
3442 }
3443 }
3444 // handle special case of empty no offset text
3445 if (noOffsetLen == 0) {
3446 return context.setParsedField(OFFSET_SECONDS, 0, position, position);
3447 }
3448 return ~position;
3449 }
3450
3451 /**
3452 * Parse a two digit zero-prefixed number.
3453 *
3454 * @param array the array of parsed data, 0=pos,1=hours,2=mins,3=secs, not null
3455 * @param arrayIndex the index to parse the value into
3456 * @param parseText the offset ID, not null
3457 * @param required whether this number is required
3458 * @param parseType the offset pattern type
3459 * @return true if an error occurred
3460 */
3461 private boolean parseNumber(int[] array, int arrayIndex, CharSequence parseText, boolean required, int parseType) {
3462 if ((parseType + 3) / 2 < arrayIndex) {
3463 return false; // ignore seconds/minutes
3464 }
3465 int pos = array[0];
3466 if ((parseType % 2) == 0 && arrayIndex > 1) {
3467 if (pos + 1 > parseText.length() || parseText.charAt(pos) != ':') {
3468 return required;
3469 }
3470 pos++;
3471 }
3472 if (pos + 2 > parseText.length()) {
3473 return required;
3474 }
3475 char ch1 = parseText.charAt(pos++);
3476 char ch2 = parseText.charAt(pos++);
3477 if (ch1 < '0' || ch1 > '9' || ch2 < '0' || ch2 > '9') {
3478 return required;
3479 }
3480 int value = (ch1 - 48) * 10 + (ch2 - 48);
3481 if (value < 0 || value > 59) {
3482 return required;
3483 }
3484 array[arrayIndex] = value;
3485 array[0] = pos;
3486 return false;
3487 }
3488
3489 @Override
3490 public String toString() {
3491 String converted = noOffsetText.replace("'", "''");
3492 return "Offset(" + PATTERNS[type] + ",'" + converted + "')";
3493 }
3494 }
3495
3496 //-----------------------------------------------------------------------
3497 /**
3498 * Prints or parses an offset ID.
3499 */
3500 static final class LocalizedOffsetIdPrinterParser implements DateTimePrinterParser {
3501 private final TextStyle style;
3502
3503 /**
3504 * Constructor.
3505 *
3506 * @param style the style, not null
3507 */
3508 LocalizedOffsetIdPrinterParser(TextStyle style) {
3509 this.style = style;
3510 }
3511
3512 private static StringBuilder appendHMS(StringBuilder buf, int t) {
3513 return buf.append((char)(t / 10 + '0'))
3514 .append((char)(t % 10 + '0'));
3515 }
3516
3517 @Override
3518 public boolean format(DateTimePrintContext context, StringBuilder buf) {
3519 Long offsetSecs = context.getValue(OFFSET_SECONDS);
3520 if (offsetSecs == null) {
3521 return false;
3522 }
3523 String gmtText = "GMT"; // TODO: get localized version of 'GMT'
3524 buf.append(gmtText);
3525 int totalSecs = Math.toIntExact(offsetSecs);
3526 if (totalSecs != 0) {
3527 int absHours = Math.abs((totalSecs / 3600) % 100); // anything larger than 99 silently dropped
3528 int absMinutes = Math.abs((totalSecs / 60) % 60);
3529 int absSeconds = Math.abs(totalSecs % 60);
3530 buf.append(totalSecs < 0 ? "-" : "+");
3531 if (style == TextStyle.FULL) {
3532 appendHMS(buf, absHours);
3533 buf.append(':');
3534 appendHMS(buf, absMinutes);
3535 if (absSeconds != 0) {
3536 buf.append(':');
3537 appendHMS(buf, absSeconds);
3538 }
3539 } else {
3540 if (absHours >= 10) {
3541 buf.append((char)(absHours / 10 + '0'));
3542 }
3543 buf.append((char)(absHours % 10 + '0'));
3544 if (absMinutes != 0 || absSeconds != 0) {
3545 buf.append(':');
3546 appendHMS(buf, absMinutes);
3547 if (absSeconds != 0) {
3548 buf.append(':');
3549 appendHMS(buf, absSeconds);
3550 }
3551 }
3552 }
3553 }
3554 return true;
3555 }
3556
3557 int getDigit(CharSequence text, int position) {
3558 char c = text.charAt(position);
3559 if (c < '0' || c > '9') {
3560 return -1;
3561 }
3562 return c - '0';
3563 }
3564
3565 @Override
3566 public int parse(DateTimeParseContext context, CharSequence text, int position) {
3567 int pos = position;
3568 int end = text.length();
3569 String gmtText = "GMT"; // TODO: get localized version of 'GMT'
3570 if (!context.subSequenceEquals(text, pos, gmtText, 0, gmtText.length())) {
3571 return ~position;
3572 }
3573 pos += gmtText.length();
3574 // parse normal plus/minus offset
3575 int negative = 0;
3576 if (pos == end) {
3577 return context.setParsedField(OFFSET_SECONDS, 0, position, pos);
3578 }
3579 char sign = text.charAt(pos); // IOOBE if invalid position
3580 if (sign == '+') {
3581 negative = 1;
3582 } else if (sign == '-') {
3583 negative = -1;
3584 } else {
3585 return context.setParsedField(OFFSET_SECONDS, 0, position, pos);
3586 }
3587 pos++;
3588 int h = 0;
3589 int m = 0;
3590 int s = 0;
3591 if (style == TextStyle.FULL) {
3592 int h1 = getDigit(text, pos++);
3593 int h2 = getDigit(text, pos++);
3594 if (h1 < 0 || h2 < 0 || text.charAt(pos++) != ':') {
3595 return ~position;
3596 }
3597 h = h1 * 10 + h2;
3598 int m1 = getDigit(text, pos++);
3599 int m2 = getDigit(text, pos++);
3600 if (m1 < 0 || m2 < 0) {
3601 return ~position;
3602 }
3603 m = m1 * 10 + m2;
3604 if (pos + 2 < end && text.charAt(pos) == ':') {
3605 int s1 = getDigit(text, pos + 1);
3606 int s2 = getDigit(text, pos + 2);
3607 if (s1 >= 0 && s2 >= 0) {
3608 s = s1 * 10 + s2;
3609 pos += 3;
3610 }
3611 }
3612 } else {
3613 h = getDigit(text, pos++);
3614 if (h < 0) {
3615 return ~position;
3616 }
3617 if (pos < end) {
3618 int h2 = getDigit(text, pos);
3619 if (h2 >=0) {
3620 h = h * 10 + h2;
3621 pos++;
3622 }
3623 if (pos + 2 < end && text.charAt(pos) == ':') {
3624 if (pos + 2 < end && text.charAt(pos) == ':') {
3625 int m1 = getDigit(text, pos + 1);
3626 int m2 = getDigit(text, pos + 2);
3627 if (m1 >= 0 && m2 >= 0) {
3628 m = m1 * 10 + m2;
3629 pos += 3;
3630 if (pos + 2 < end && text.charAt(pos) == ':') {
3631 int s1 = getDigit(text, pos + 1);
3632 int s2 = getDigit(text, pos + 2);
3633 if (s1 >= 0 && s2 >= 0) {
3634 s = s1 * 10 + s2;
3635 pos += 3;
3636 }
3637 }
3638 }
3639 }
3640 }
3641 }
3642 }
3643 long offsetSecs = negative * (h * 3600L + m * 60L + s);
3644 return context.setParsedField(OFFSET_SECONDS, offsetSecs, position, pos);
3645 }
3646
3647 @Override
3648 public String toString() {
3649 return "LocalizedOffset(" + style + ")";
3650 }
3651 }
3652
3653 //-----------------------------------------------------------------------
3654 /**
3655 * Prints or parses a zone ID.
3656 */
3657 static final class ZoneTextPrinterParser extends ZoneIdPrinterParser {
3658
3659 /** The text style to output. */
3660 private final TextStyle textStyle;
3661
3662 /** The preferred zoneid map */
3663 private Set<String> preferredZones;
3664
3665 ZoneTextPrinterParser(TextStyle textStyle, Set<ZoneId> preferredZones) {
3666 super(TemporalQueries.zone(), "ZoneText(" + textStyle + ")");
3667 this.textStyle = Objects.requireNonNull(textStyle, "textStyle");
3668 if (preferredZones != null && preferredZones.size() != 0) {
3669 this.preferredZones = new HashSet<>();
3670 for (ZoneId id : preferredZones) {
3671 this.preferredZones.add(id.getId());
3672 }
3673 }
3674 }
3675
3676 private static final int STD = 0;
3677 private static final int DST = 1;
3678 private static final int GENERIC = 2;
3679 private static final Map<String, SoftReference<Map<Locale, String[]>>> cache =
3680 new ConcurrentHashMap<>();
3681
3682 private String getDisplayName(String id, int type, Locale locale) {
3683 if (textStyle == TextStyle.NARROW) {
3684 return null;
3685 }
3686 String[] names;
3687 SoftReference<Map<Locale, String[]>> ref = cache.get(id);
3688 Map<Locale, String[]> perLocale = null;
3689 if (ref == null || (perLocale = ref.get()) == null ||
3690 (names = perLocale.get(locale)) == null) {
3691 names = TimeZoneNameUtility.retrieveDisplayNames(id, locale);
3692 if (names == null) {
3693 return null;
3694 }
3695 names = Arrays.copyOfRange(names, 0, 7);
3696 names[5] =
3697 TimeZoneNameUtility.retrieveGenericDisplayName(id, TimeZone.LONG, locale);
3698 if (names[5] == null) {
3699 names[5] = names[0]; // use the id
3700 }
3701 names[6] =
3702 TimeZoneNameUtility.retrieveGenericDisplayName(id, TimeZone.SHORT, locale);
3703 if (names[6] == null) {
3704 names[6] = names[0];
3705 }
3706 if (perLocale == null) {
3707 perLocale = new ConcurrentHashMap<>();
3708 }
3709 perLocale.put(locale, names);
3710 cache.put(id, new SoftReference<>(perLocale));
3711 }
3712 switch (type) {
3713 case STD:
3714 return names[textStyle.zoneNameStyleIndex() + 1];
3715 case DST:
3716 return names[textStyle.zoneNameStyleIndex() + 3];
3717 }
3718 return names[textStyle.zoneNameStyleIndex() + 5];
3719 }
3720
3721 @Override
3722 public boolean format(DateTimePrintContext context, StringBuilder buf) {
3723 ZoneId zone = context.getValue(TemporalQueries.zoneId());
3724 if (zone == null) {
3725 return false;
3726 }
3727 String zname = zone.getId();
3728 if (!(zone instanceof ZoneOffset)) {
3729 TemporalAccessor dt = context.getTemporal();
3730 String name = getDisplayName(zname,
3731 dt.isSupported(ChronoField.INSTANT_SECONDS)
3732 ? (zone.getRules().isDaylightSavings(Instant.from(dt)) ? DST : STD)
3733 : GENERIC,
3734 context.getLocale());
3735 if (name != null) {
3736 zname = name;
3737 }
3738 }
3739 buf.append(zname);
3740 return true;
3741 }
3742
3743 // cache per instance for now
3744 private final Map<Locale, Entry<Integer, SoftReference<PrefixTree>>>
3745 cachedTree = new HashMap<>();
3746 private final Map<Locale, Entry<Integer, SoftReference<PrefixTree>>>
3747 cachedTreeCI = new HashMap<>();
3748
3749 @Override
3750 protected PrefixTree getTree(DateTimeParseContext context) {
3751 if (textStyle == TextStyle.NARROW) {
3752 return super.getTree(context);
3753 }
3754 Locale locale = context.getLocale();
3755 boolean isCaseSensitive = context.isCaseSensitive();
3756 Set<String> regionIds = ZoneRulesProvider.getAvailableZoneIds();
3757 int regionIdsSize = regionIds.size();
3758
3759 Map<Locale, Entry<Integer, SoftReference<PrefixTree>>> cached =
3760 isCaseSensitive ? cachedTree : cachedTreeCI;
3761
3762 Entry<Integer, SoftReference<PrefixTree>> entry = null;
3763 PrefixTree tree = null;
3764 String[][] zoneStrings = null;
3765 if ((entry = cached.get(locale)) == null ||
3766 (entry.getKey() != regionIdsSize ||
3767 (tree = entry.getValue().get()) == null)) {
3768 tree = PrefixTree.newTree(context);
3769 zoneStrings = TimeZoneNameUtility.getZoneStrings(locale);
3770 for (String[] names : zoneStrings) {
3771 String zid = names[0];
3772 if (!regionIds.contains(zid)) {
3773 continue;
3774 }
3775 tree.add(zid, zid); // don't convert zid -> metazone
3776 zid = ZoneName.toZid(zid, locale);
3777 int i = textStyle == TextStyle.FULL ? 1 : 2;
3778 for (; i < names.length; i += 2) {
3779 tree.add(names[i], zid);
3780 }
3781 }
3782 // if we have a set of preferred zones, need a copy and
3783 // add the preferred zones again to overwrite
3784 if (preferredZones != null) {
3785 for (String[] names : zoneStrings) {
3786 String zid = names[0];
3787 if (!preferredZones.contains(zid) || !regionIds.contains(zid)) {
3788 continue;
3789 }
3790 int i = textStyle == TextStyle.FULL ? 1 : 2;
3791 for (; i < names.length; i += 2) {
3792 tree.add(names[i], zid);
3793 }
3794 }
3795 }
3796 cached.put(locale, new SimpleImmutableEntry<>(regionIdsSize, new SoftReference<>(tree)));
3797 }
3798 return tree;
3799 }
3800 }
3801
3802 //-----------------------------------------------------------------------
3803 /**
3804 * Prints or parses a zone ID.
3805 */
3806 static class ZoneIdPrinterParser implements DateTimePrinterParser {
3807 private final TemporalQuery<ZoneId> query;
3808 private final String description;
3809
3810 ZoneIdPrinterParser(TemporalQuery<ZoneId> query, String description) {
3811 this.query = query;
3812 this.description = description;
3813 }
3814
3815 @Override
3816 public boolean format(DateTimePrintContext context, StringBuilder buf) {
3817 ZoneId zone = context.getValue(query);
3818 if (zone == null) {
3819 return false;
3820 }
3821 buf.append(zone.getId());
3822 return true;
3823 }
3824
3825 /**
3826 * The cached tree to speed up parsing.
3827 */
3828 private static volatile Entry<Integer, PrefixTree> cachedPrefixTree;
3829 private static volatile Entry<Integer, PrefixTree> cachedPrefixTreeCI;
3830
3831 protected PrefixTree getTree(DateTimeParseContext context) {
3832 // prepare parse tree
3833 Set<String> regionIds = ZoneRulesProvider.getAvailableZoneIds();
3834 final int regionIdsSize = regionIds.size();
3835 Entry<Integer, PrefixTree> cached = context.isCaseSensitive()
3836 ? cachedPrefixTree : cachedPrefixTreeCI;
3837 if (cached == null || cached.getKey() != regionIdsSize) {
3838 synchronized (this) {
3839 cached = context.isCaseSensitive() ? cachedPrefixTree : cachedPrefixTreeCI;
3840 if (cached == null || cached.getKey() != regionIdsSize) {
3841 cached = new SimpleImmutableEntry<>(regionIdsSize, PrefixTree.newTree(regionIds, context));
3842 if (context.isCaseSensitive()) {
3843 cachedPrefixTree = cached;
3844 } else {
3845 cachedPrefixTreeCI = cached;
3846 }
3847 }
3848 }
3849 }
3850 return cached.getValue();
3851 }
3852
3853 /**
3854 * This implementation looks for the longest matching string.
3855 * For example, parsing Etc/GMT-2 will return Etc/GMC-2 rather than just
3856 * Etc/GMC although both are valid.
3857 */
3858 @Override
3859 public int parse(DateTimeParseContext context, CharSequence text, int position) {
3860 int length = text.length();
3861 if (position > length) {
3862 throw new IndexOutOfBoundsException();
3863 }
3864 if (position == length) {
3865 return ~position;
3866 }
3867
3868 // handle fixed time-zone IDs
3869 char nextChar = text.charAt(position);
3870 if (nextChar == '+' || nextChar == '-') {
3871 return parseOffsetBased(context, text, position, position, OffsetIdPrinterParser.INSTANCE_ID_Z);
3872 } else if (length >= position + 2) {
3873 char nextNextChar = text.charAt(position + 1);
3874 if (context.charEquals(nextChar, 'U') && context.charEquals(nextNextChar, 'T')) {
3875 if (length >= position + 3 && context.charEquals(text.charAt(position + 2), 'C')) {
3876 return parseOffsetBased(context, text, position, position + 3, OffsetIdPrinterParser.INSTANCE_ID_ZERO);
3877 }
3878 return parseOffsetBased(context, text, position, position + 2, OffsetIdPrinterParser.INSTANCE_ID_ZERO);
3879 } else if (context.charEquals(nextChar, 'G') && length >= position + 3 &&
3880 context.charEquals(nextNextChar, 'M') && context.charEquals(text.charAt(position + 2), 'T')) {
3881 if (length >= position + 4 && context.charEquals(text.charAt(position + 3), '0')) {
3882 context.setParsed(ZoneId.of("GMT0"));
3883 return position + 4;
3884 }
3885 return parseOffsetBased(context, text, position, position + 3, OffsetIdPrinterParser.INSTANCE_ID_ZERO);
3886 }
3887 }
3888
3889 // parse
3890 PrefixTree tree = getTree(context);
3891 ParsePosition ppos = new ParsePosition(position);
3892 String parsedZoneId = tree.match(text, ppos);
3893 if (parsedZoneId == null) {
3894 if (context.charEquals(nextChar, 'Z')) {
3895 context.setParsed(ZoneOffset.UTC);
3896 return position + 1;
3897 }
3898 return ~position;
3899 }
3900 context.setParsed(ZoneId.of(parsedZoneId));
3901 return ppos.getIndex();
3902 }
3903
3904 /**
3905 * Parse an offset following a prefix and set the ZoneId if it is valid.
3906 * To matching the parsing of ZoneId.of the values are not normalized
3907 * to ZoneOffsets.
3908 *
3909 * @param context the parse context
3910 * @param text the input text
3911 * @param prefixPos start of the prefix
3912 * @param position start of text after the prefix
3913 * @param parser parser for the value after the prefix
3914 * @return the position after the parse
3915 */
3916 private int parseOffsetBased(DateTimeParseContext context, CharSequence text, int prefixPos, int position, OffsetIdPrinterParser parser) {
3917 String prefix = text.toString().substring(prefixPos, position).toUpperCase();
3918 if (position >= text.length()) {
3919 context.setParsed(ZoneId.of(prefix));
3920 return position;
3921 }
3922
3923 // '0' or 'Z' after prefix is not part of a valid ZoneId; use bare prefix
3924 if (text.charAt(position) == '0' ||
3925 context.charEquals(text.charAt(position), 'Z')) {
3926 context.setParsed(ZoneId.of(prefix));
3927 return position;
3928 }
3929
3930 DateTimeParseContext newContext = context.copy();
3931 int endPos = parser.parse(newContext, text, position);
3932 try {
3933 if (endPos < 0) {
3934 if (parser == OffsetIdPrinterParser.INSTANCE_ID_Z) {
3935 return ~prefixPos;
3936 }
3937 context.setParsed(ZoneId.of(prefix));
3938 return position;
3939 }
3940 int offset = (int) newContext.getParsed(OFFSET_SECONDS).longValue();
3941 ZoneOffset zoneOffset = ZoneOffset.ofTotalSeconds(offset);
3942 context.setParsed(ZoneId.ofOffset(prefix, zoneOffset));
3943 return endPos;
3944 } catch (DateTimeException dte) {
3945 return ~prefixPos;
3946 }
3947 }
3948
3949 @Override
3950 public String toString() {
3951 return description;
3952 }
3953 }
3954
3955 //-----------------------------------------------------------------------
3956 /**
3957 * A String based prefix tree for parsing time-zone names.
3958 */
3959 static class PrefixTree {
3960 protected String key;
3961 protected String value;
3962 protected char c0; // performance optimization to avoid the
3963 // boundary check cost of key.charat(0)
3964 protected PrefixTree child;
3965 protected PrefixTree sibling;
3966
3967 private PrefixTree(String k, String v, PrefixTree child) {
3968 this.key = k;
3969 this.value = v;
3970 this.child = child;
3971 if (k.length() == 0){
3972 c0 = 0xffff;
3973 } else {
3974 c0 = key.charAt(0);
3975 }
3976 }
3977
3978 /**
3979 * Creates a new prefix parsing tree based on parse context.
3980 *
3981 * @param context the parse context
3982 * @return the tree, not null
3983 */
3984 public static PrefixTree newTree(DateTimeParseContext context) {
3985 //if (!context.isStrict()) {
3986 // return new LENIENT("", null, null);
3987 //}
3988 if (context.isCaseSensitive()) {
3989 return new PrefixTree("", null, null);
3990 }
3991 return new CI("", null, null);
3992 }
3993
3994 /**
3995 * Creates a new prefix parsing tree.
3996 *
3997 * @param keys a set of strings to build the prefix parsing tree, not null
3998 * @param context the parse context
3999 * @return the tree, not null
4000 */
4001 public static PrefixTree newTree(Set<String> keys, DateTimeParseContext context) {
4002 PrefixTree tree = newTree(context);
4003 for (String k : keys) {
4004 tree.add0(k, k);
4005 }
4006 return tree;
4007 }
4008
4009 /**
4010 * Clone a copy of this tree
4011 */
4012 public PrefixTree copyTree() {
4013 PrefixTree copy = new PrefixTree(key, value, null);
4014 if (child != null) {
4015 copy.child = child.copyTree();
4016 }
4017 if (sibling != null) {
4018 copy.sibling = sibling.copyTree();
4019 }
4020 return copy;
4021 }
4022
4023
4024 /**
4025 * Adds a pair of {key, value} into the prefix tree.
4026 *
4027 * @param k the key, not null
4028 * @param v the value, not null
4029 * @return true if the pair is added successfully
4030 */
4031 public boolean add(String k, String v) {
4032 return add0(k, v);
4033 }
4034
4035 private boolean add0(String k, String v) {
4036 k = toKey(k);
4037 int prefixLen = prefixLength(k);
4038 if (prefixLen == key.length()) {
4039 if (prefixLen < k.length()) { // down the tree
4040 String subKey = k.substring(prefixLen);
4041 PrefixTree c = child;
4042 while (c != null) {
4043 if (isEqual(c.c0, subKey.charAt(0))) {
4044 return c.add0(subKey, v);
4045 }
4046 c = c.sibling;
4047 }
4048 // add the node as the child of the current node
4049 c = newNode(subKey, v, null);
4050 c.sibling = child;
4051 child = c;
4052 return true;
4053 }
4054 // have an existing <key, value> already, overwrite it
4055 // if (value != null) {
4056 // return false;
4057 //}
4058 value = v;
4059 return true;
4060 }
4061 // split the existing node
4062 PrefixTree n1 = newNode(key.substring(prefixLen), value, child);
4063 key = k.substring(0, prefixLen);
4064 child = n1;
4065 if (prefixLen < k.length()) {
4066 PrefixTree n2 = newNode(k.substring(prefixLen), v, null);
4067 child.sibling = n2;
4068 value = null;
4069 } else {
4070 value = v;
4071 }
4072 return true;
4073 }
4074
4075 /**
4076 * Match text with the prefix tree.
4077 *
4078 * @param text the input text to parse, not null
4079 * @param off the offset position to start parsing at
4080 * @param end the end position to stop parsing
4081 * @return the resulting string, or null if no match found.
4082 */
4083 public String match(CharSequence text, int off, int end) {
4084 if (!prefixOf(text, off, end)){
4085 return null;
4086 }
4087 if (child != null && (off += key.length()) != end) {
4088 PrefixTree c = child;
4089 do {
4090 if (isEqual(c.c0, text.charAt(off))) {
4091 String found = c.match(text, off, end);
4092 if (found != null) {
4093 return found;
4094 }
4095 return value;
4096 }
4097 c = c.sibling;
4098 } while (c != null);
4099 }
4100 return value;
4101 }
4102
4103 /**
4104 * Match text with the prefix tree.
4105 *
4106 * @param text the input text to parse, not null
4107 * @param pos the position to start parsing at, from 0 to the text
4108 * length. Upon return, position will be updated to the new parse
4109 * position, or unchanged, if no match found.
4110 * @return the resulting string, or null if no match found.
4111 */
4112 public String match(CharSequence text, ParsePosition pos) {
4113 int off = pos.getIndex();
4114 int end = text.length();
4115 if (!prefixOf(text, off, end)){
4116 return null;
4117 }
4118 off += key.length();
4119 if (child != null && off != end) {
4120 PrefixTree c = child;
4121 do {
4122 if (isEqual(c.c0, text.charAt(off))) {
4123 pos.setIndex(off);
4124 String found = c.match(text, pos);
4125 if (found != null) {
4126 return found;
4127 }
4128 break;
4129 }
4130 c = c.sibling;
4131 } while (c != null);
4132 }
4133 pos.setIndex(off);
4134 return value;
4135 }
4136
4137 protected String toKey(String k) {
4138 return k;
4139 }
4140
4141 protected PrefixTree newNode(String k, String v, PrefixTree child) {
4142 return new PrefixTree(k, v, child);
4143 }
4144
4145 protected boolean isEqual(char c1, char c2) {
4146 return c1 == c2;
4147 }
4148
4149 protected boolean prefixOf(CharSequence text, int off, int end) {
4150 if (text instanceof String) {
4151 return ((String)text).startsWith(key, off);
4152 }
4153 int len = key.length();
4154 if (len > end - off) {
4155 return false;
4156 }
4157 int off0 = 0;
4158 while (len-- > 0) {
4159 if (!isEqual(key.charAt(off0++), text.charAt(off++))) {
4160 return false;
4161 }
4162 }
4163 return true;
4164 }
4165
4166 private int prefixLength(String k) {
4167 int off = 0;
4168 while (off < k.length() && off < key.length()) {
4169 if (!isEqual(k.charAt(off), key.charAt(off))) {
4170 return off;
4171 }
4172 off++;
4173 }
4174 return off;
4175 }
4176
4177 /**
4178 * Case Insensitive prefix tree.
4179 */
4180 private static class CI extends PrefixTree {
4181
4182 private CI(String k, String v, PrefixTree child) {
4183 super(k, v, child);
4184 }
4185
4186 @Override
4187 protected CI newNode(String k, String v, PrefixTree child) {
4188 return new CI(k, v, child);
4189 }
4190
4191 @Override
4192 protected boolean isEqual(char c1, char c2) {
4193 return DateTimeParseContext.charEqualsIgnoreCase(c1, c2);
4194 }
4195
4196 @Override
4197 protected boolean prefixOf(CharSequence text, int off, int end) {
4198 int len = key.length();
4199 if (len > end - off) {
4200 return false;
4201 }
4202 int off0 = 0;
4203 while (len-- > 0) {
4204 if (!isEqual(key.charAt(off0++), text.charAt(off++))) {
4205 return false;
4206 }
4207 }
4208 return true;
4209 }
4210 }
4211
4212 /**
4213 * Lenient prefix tree. Case insensitive and ignores characters
4214 * like space, underscore and slash.
4215 */
4216 private static class LENIENT extends CI {
4217
4218 private LENIENT(String k, String v, PrefixTree child) {
4219 super(k, v, child);
4220 }
4221
4222 @Override
4223 protected CI newNode(String k, String v, PrefixTree child) {
4224 return new LENIENT(k, v, child);
4225 }
4226
4227 private boolean isLenientChar(char c) {
4228 return c == ' ' || c == '_' || c == '/';
4229 }
4230
4231 protected String toKey(String k) {
4232 for (int i = 0; i < k.length(); i++) {
4233 if (isLenientChar(k.charAt(i))) {
4234 StringBuilder sb = new StringBuilder(k.length());
4235 sb.append(k, 0, i);
4236 i++;
4237 while (i < k.length()) {
4238 if (!isLenientChar(k.charAt(i))) {
4239 sb.append(k.charAt(i));
4240 }
4241 i++;
4242 }
4243 return sb.toString();
4244 }
4245 }
4246 return k;
4247 }
4248
4249 @Override
4250 public String match(CharSequence text, ParsePosition pos) {
4251 int off = pos.getIndex();
4252 int end = text.length();
4253 int len = key.length();
4254 int koff = 0;
4255 while (koff < len && off < end) {
4256 if (isLenientChar(text.charAt(off))) {
4257 off++;
4258 continue;
4259 }
4260 if (!isEqual(key.charAt(koff++), text.charAt(off++))) {
4261 return null;
4262 }
4263 }
4264 if (koff != len) {
4265 return null;
4266 }
4267 if (child != null && off != end) {
4268 int off0 = off;
4269 while (off0 < end && isLenientChar(text.charAt(off0))) {
4270 off0++;
4271 }
4272 if (off0 < end) {
4273 PrefixTree c = child;
4274 do {
4275 if (isEqual(c.c0, text.charAt(off0))) {
4276 pos.setIndex(off0);
4277 String found = c.match(text, pos);
4278 if (found != null) {
4279 return found;
4280 }
4281 break;
4282 }
4283 c = c.sibling;
4284 } while (c != null);
4285 }
4286 }
4287 pos.setIndex(off);
4288 return value;
4289 }
4290 }
4291 }
4292
4293 //-----------------------------------------------------------------------
4294 /**
4295 * Prints or parses a chronology.
4296 */
4297 static final class ChronoPrinterParser implements DateTimePrinterParser {
4298 /** The text style to output, null means the ID. */
4299 private final TextStyle textStyle;
4300
4301 ChronoPrinterParser(TextStyle textStyle) {
4302 // validated by caller
4303 this.textStyle = textStyle;
4304 }
4305
4306 @Override
4307 public boolean format(DateTimePrintContext context, StringBuilder buf) {
4308 Chronology chrono = context.getValue(TemporalQueries.chronology());
4309 if (chrono == null) {
4310 return false;
4311 }
4312 if (textStyle == null) {
4313 buf.append(chrono.getId());
4314 } else {
4315 buf.append(getChronologyName(chrono, context.getLocale()));
4316 }
4317 return true;
4318 }
4319
4320 @Override
4321 public int parse(DateTimeParseContext context, CharSequence text, int position) {
4322 // simple looping parser to find the chronology
4323 if (position < 0 || position > text.length()) {
4324 throw new IndexOutOfBoundsException();
4325 }
4326 Set<Chronology> chronos = Chronology.getAvailableChronologies();
4327 Chronology bestMatch = null;
4328 int matchLen = -1;
4329 for (Chronology chrono : chronos) {
4330 String name;
4331 if (textStyle == null) {
4332 name = chrono.getId();
4333 } else {
4334 name = getChronologyName(chrono, context.getLocale());
4335 }
4336 int nameLen = name.length();
4337 if (nameLen > matchLen && context.subSequenceEquals(text, position, name, 0, nameLen)) {
4338 bestMatch = chrono;
4339 matchLen = nameLen;
4340 }
4341 }
4342 if (bestMatch == null) {
4343 return ~position;
4344 }
4345 context.setParsed(bestMatch);
4346 return position + matchLen;
4347 }
4348
4349 /**
4350 * Returns the chronology name of the given chrono in the given locale
4351 * if available, or the chronology Id otherwise. The regular ResourceBundle
4352 * search path is used for looking up the chronology name.
4353 *
4354 * @param chrono the chronology, not null
4355 * @param locale the locale, not null
4356 * @return the chronology name of chrono in locale, or the id if no name is available
4357 * @throws NullPointerException if chrono or locale is null
4358 */
4359 private String getChronologyName(Chronology chrono, Locale locale) {
4360 String key = "calendarname." + chrono.getCalendarType();
4361 String name = DateTimeTextProvider.getLocalizedResource(key, locale);
4362 return Objects.requireNonNullElseGet(name, () -> chrono.getId());
4363 }
4364 }
4365
4366 //-----------------------------------------------------------------------
4367 /**
4368 * Prints or parses a localized pattern.
4369 */
4370 static final class LocalizedPrinterParser implements DateTimePrinterParser {
4371 /** Cache of formatters. */
4372 private static final ConcurrentMap<String, DateTimeFormatter> FORMATTER_CACHE = new ConcurrentHashMap<>(16, 0.75f, 2);
4373
4374 private final FormatStyle dateStyle;
4375 private final FormatStyle timeStyle;
4376
4377 /**
4378 * Constructor.
4379 *
4380 * @param dateStyle the date style to use, may be null
4381 * @param timeStyle the time style to use, may be null
4382 */
4383 LocalizedPrinterParser(FormatStyle dateStyle, FormatStyle timeStyle) {
4384 // validated by caller
4385 this.dateStyle = dateStyle;
4386 this.timeStyle = timeStyle;
4387 }
4388
4389 @Override
4390 public boolean format(DateTimePrintContext context, StringBuilder buf) {
4391 Chronology chrono = Chronology.from(context.getTemporal());
4392 return formatter(context.getLocale(), chrono).toPrinterParser(false).format(context, buf);
4393 }
4394
4395 @Override
4396 public int parse(DateTimeParseContext context, CharSequence text, int position) {
4397 Chronology chrono = context.getEffectiveChronology();
4398 return formatter(context.getLocale(), chrono).toPrinterParser(false).parse(context, text, position);
4399 }
4400
4401 /**
4402 * Gets the formatter to use.
4403 * <p>
4404 * The formatter will be the most appropriate to use for the date and time style in the locale.
4405 * For example, some locales will use the month name while others will use the number.
4406 *
4407 * @param locale the locale to use, not null
4408 * @param chrono the chronology to use, not null
4409 * @return the formatter, not null
4410 * @throws IllegalArgumentException if the formatter cannot be found
4411 */
4412 private DateTimeFormatter formatter(Locale locale, Chronology chrono) {
4413 String key = chrono.getId() + '|' + locale.toString() + '|' + dateStyle + timeStyle;
4414 DateTimeFormatter formatter = FORMATTER_CACHE.get(key);
4415 if (formatter == null) {
4416 String pattern = getLocalizedDateTimePattern(dateStyle, timeStyle, chrono, locale);
4417 formatter = new DateTimeFormatterBuilder().appendPattern(pattern).toFormatter(locale);
4418 DateTimeFormatter old = FORMATTER_CACHE.putIfAbsent(key, formatter);
4419 if (old != null) {
4420 formatter = old;
4421 }
4422 }
4423 return formatter;
4424 }
4425
4426 @Override
4427 public String toString() {
4428 return "Localized(" + (dateStyle != null ? dateStyle : "") + "," +
4429 (timeStyle != null ? timeStyle : "") + ")";
4430 }
4431 }
4432
4433 //-----------------------------------------------------------------------
4434 /**
4435 * Prints or parses a localized pattern from a localized field.
4436 * The specific formatter and parameters is not selected until the
4437 * the field is to be printed or parsed.
4438 * The locale is needed to select the proper WeekFields from which
4439 * the field for day-of-week, week-of-month, or week-of-year is selected.
4440 */
4441 static final class WeekBasedFieldPrinterParser implements DateTimePrinterParser {
4442 private char chr;
4443 private int count;
4444
4445 /**
4446 * Constructor.
4447 *
4448 * @param chr the pattern format letter that added this PrinterParser.
4449 * @param count the repeat count of the format letter
4450 */
4451 WeekBasedFieldPrinterParser(char chr, int count) {
4452 this.chr = chr;
4453 this.count = count;
4454 }
4455
4456 @Override
4457 public boolean format(DateTimePrintContext context, StringBuilder buf) {
4458 return printerParser(context.getLocale()).format(context, buf);
4459 }
4460
4461 @Override
4462 public int parse(DateTimeParseContext context, CharSequence text, int position) {
4463 return printerParser(context.getLocale()).parse(context, text, position);
4464 }
4465
4466 /**
4467 * Gets the printerParser to use based on the field and the locale.
4468 *
4469 * @param locale the locale to use, not null
4470 * @return the formatter, not null
4471 * @throws IllegalArgumentException if the formatter cannot be found
4472 */
4473 private DateTimePrinterParser printerParser(Locale locale) {
4474 WeekFields weekDef = WeekFields.of(locale);
4475 TemporalField field = null;
4476 switch (chr) {
4477 case 'Y':
4478 field = weekDef.weekBasedYear();
4479 if (count == 2) {
4480 return new ReducedPrinterParser(field, 2, 2, 0, ReducedPrinterParser.BASE_DATE, 0);
4481 } else {
4482 return new NumberPrinterParser(field, count, 19,
4483 (count < 4) ? SignStyle.NORMAL : SignStyle.EXCEEDS_PAD, -1);
4484 }
4485 case 'e':
4486 case 'c':
4487 field = weekDef.dayOfWeek();
4488 break;
4489 case 'w':
4490 field = weekDef.weekOfWeekBasedYear();
4491 break;
4492 case 'W':
4493 field = weekDef.weekOfMonth();
4494 break;
4495 default:
4496 throw new IllegalStateException("unreachable");
4497 }
4498 return new NumberPrinterParser(field, (count == 2 ? 2 : 1), 2, SignStyle.NOT_NEGATIVE);
4499 }
4500
4501 @Override
4502 public String toString() {
4503 StringBuilder sb = new StringBuilder(30);
4504 sb.append("Localized(");
4505 if (chr == 'Y') {
4506 if (count == 1) {
4507 sb.append("WeekBasedYear");
4508 } else if (count == 2) {
4509 sb.append("ReducedValue(WeekBasedYear,2,2,2000-01-01)");
4510 } else {
4511 sb.append("WeekBasedYear,").append(count).append(",")
4512 .append(19).append(",")
4513 .append((count < 4) ? SignStyle.NORMAL : SignStyle.EXCEEDS_PAD);
4514 }
4515 } else {
4516 switch (chr) {
4517 case 'c':
4518 case 'e':
4519 sb.append("DayOfWeek");
4520 break;
4521 case 'w':
4522 sb.append("WeekOfWeekBasedYear");
4523 break;
4524 case 'W':
4525 sb.append("WeekOfMonth");
4526 break;
4527 default:
4528 break;
4529 }
4530 sb.append(",");
4531 sb.append(count);
4532 }
4533 sb.append(")");
4534 return sb.toString();
4535 }
4536 }
4537
4538 //-------------------------------------------------------------------------
4539 /**
4540 * Length comparator.
4541 */
4542 static final Comparator<String> LENGTH_SORT = new Comparator<String>() {
4543 @Override
4544 public int compare(String str1, String str2) {
4545 return str1.length() == str2.length() ? str1.compareTo(str2) : str1.length() - str2.length();
4546 }
4547 };
4548 }