1 // © 2016 and later: Unicode, Inc. and others. 2 // License & terms of use: http://www.unicode.org/copyright.html 3 /* 4 ******************************************************************************** 5 * Copyright (C) 1997-2016, International Business Machines 6 * Corporation and others. All Rights Reserved. 7 ******************************************************************************** 8 * 9 * File DATEFMT.H 10 * 11 * Modification History: 12 * 13 * Date Name Description 14 * 02/19/97 aliu Converted from java. 15 * 04/01/97 aliu Added support for centuries. 16 * 07/23/98 stephen JDK 1.2 sync 17 * 11/15/99 weiv Added support for week of year/day of week formatting 18 ******************************************************************************** 19 */ 20 21 #ifndef DATEFMT_H 22 #define DATEFMT_H 23 24 #include "unicode/utypes.h" 25 26 #if U_SHOW_CPLUSPLUS_API 27 28 #if !UCONFIG_NO_FORMATTING 29 30 #include "unicode/udat.h" 31 #include "unicode/calendar.h" 32 #include "unicode/numfmt.h" 33 #include "unicode/format.h" 34 #include "unicode/locid.h" 35 #include "unicode/enumset.h" 36 #include "unicode/udisplaycontext.h" 37 38 /** 39 * \file 40 * \brief C++ API: Abstract class for converting dates. 41 */ 42 43 U_NAMESPACE_BEGIN 44 45 class TimeZone; 46 class DateTimePatternGenerator; 47 48 /** 49 * \cond 50 * Export an explicit template instantiation. (See digitlst.h, datefmt.h, and others.) 51 * (When building DLLs for Windows this is required.) 52 */ 53 #if U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN && !defined(U_IN_DOXYGEN) 54 template class U_I18N_API EnumSet<UDateFormatBooleanAttribute, 55 0, 56 UDAT_BOOLEAN_ATTRIBUTE_COUNT>; 57 #endif 58 /** \endcond */ 59 60 /** 61 * DateFormat is an abstract class for a family of classes that convert dates and 62 * times from their internal representations to textual form and back again in a 63 * language-independent manner. Converting from the internal representation (milliseconds 64 * since midnight, January 1, 1970) to text is known as "formatting," and converting 65 * from text to millis is known as "parsing." We currently define only one concrete 66 * subclass of DateFormat: SimpleDateFormat, which can handle pretty much all normal 67 * date formatting and parsing actions. 68 * <P> 69 * DateFormat helps you to format and parse dates for any locale. Your code can 70 * be completely independent of the locale conventions for months, days of the 71 * week, or even the calendar format: lunar vs. solar. 72 * <P> 73 * To format a date for the current Locale, use one of the static factory 74 * methods: 75 * <pre> 76 * \code 77 * DateFormat* dfmt = DateFormat::createDateInstance(); 78 * UDate myDate = Calendar::getNow(); 79 * UnicodeString myString; 80 * myString = dfmt->format( myDate, myString ); 81 * \endcode 82 * </pre> 83 * If you are formatting multiple numbers, it is more efficient to get the 84 * format and use it multiple times so that the system doesn't have to fetch the 85 * information about the local language and country conventions multiple times. 86 * <pre> 87 * \code 88 * DateFormat* df = DateFormat::createDateInstance(); 89 * UnicodeString myString; 90 * UDate myDateArr[] = { 0.0, 100000000.0, 2000000000.0 }; // test values 91 * for (int32_t i = 0; i < 3; ++i) { 92 * myString.remove(); 93 * cout << df->format( myDateArr[i], myString ) << endl; 94 * } 95 * \endcode 96 * </pre> 97 * To get specific fields of a date, you can use UFieldPosition to 98 * get specific fields. 99 * <pre> 100 * \code 101 * DateFormat* dfmt = DateFormat::createDateInstance(); 102 * FieldPosition pos(DateFormat::YEAR_FIELD); 103 * UnicodeString myString; 104 * myString = dfmt->format( myDate, myString ); 105 * cout << myString << endl; 106 * cout << pos.getBeginIndex() << "," << pos. getEndIndex() << endl; 107 * \endcode 108 * </pre> 109 * To format a date for a different Locale, specify it in the call to 110 * createDateInstance(). 111 * <pre> 112 * \code 113 * DateFormat* df = 114 * DateFormat::createDateInstance( DateFormat::SHORT, Locale::getFrance()); 115 * \endcode 116 * </pre> 117 * You can use a DateFormat to parse also. 118 * <pre> 119 * \code 120 * UErrorCode status = U_ZERO_ERROR; 121 * UDate myDate = df->parse(myString, status); 122 * \endcode 123 * </pre> 124 * Use createDateInstance() to produce the normal date format for that country. 125 * There are other static factory methods available. Use createTimeInstance() 126 * to produce the normal time format for that country. Use createDateTimeInstance() 127 * to produce a DateFormat that formats both date and time. You can pass in 128 * different options to these factory methods to control the length of the 129 * result; from SHORT to MEDIUM to LONG to FULL. The exact result depends on the 130 * locale, but generally: 131 * <ul type=round> 132 * <li> SHORT is completely numeric, such as 12/13/52 or 3:30pm 133 * <li> MEDIUM is longer, such as Jan 12, 1952 134 * <li> LONG is longer, such as January 12, 1952 or 3:30:32pm 135 * <li> FULL is pretty completely specified, such as 136 * Tuesday, April 12, 1952 AD or 3:30:42pm PST. 137 * </ul> 138 * You can also set the time zone on the format if you wish. If you want even 139 * more control over the format or parsing, (or want to give your users more 140 * control), you can try casting the DateFormat you get from the factory methods 141 * to a SimpleDateFormat. This will work for the majority of countries; just 142 * remember to check getDynamicClassID() before carrying out the cast. 143 * <P> 144 * You can also use forms of the parse and format methods with ParsePosition and 145 * FieldPosition to allow you to 146 * <ul type=round> 147 * <li> Progressively parse through pieces of a string. 148 * <li> Align any particular field, or find out where it is for selection 149 * on the screen. 150 * </ul> 151 * 152 * <p><em>User subclasses are not supported.</em> While clients may write 153 * subclasses, such code will not necessarily work and will not be 154 * guaranteed to work stably from release to release. 155 */ 156 class U_I18N_API DateFormat : public Format { 157 public: 158 159 /** 160 * Constants for various style patterns. These reflect the order of items in 161 * the DateTimePatterns resource. There are 4 time patterns, 4 date patterns, 162 * the default date-time pattern, and 4 date-time patterns. Each block of 4 values 163 * in the resource occurs in the order full, long, medium, short. 164 * @stable ICU 2.4 165 */ 166 enum EStyle 167 { 168 kNone = -1, 169 170 kFull = 0, 171 kLong = 1, 172 kMedium = 2, 173 kShort = 3, 174 175 kDateOffset = kShort + 1, 176 // kFull + kDateOffset = 4 177 // kLong + kDateOffset = 5 178 // kMedium + kDateOffset = 6 179 // kShort + kDateOffset = 7 180 181 kDateTime = 8, 182 // Default DateTime 183 184 kDateTimeOffset = kDateTime + 1, 185 // kFull + kDateTimeOffset = 9 186 // kLong + kDateTimeOffset = 10 187 // kMedium + kDateTimeOffset = 11 188 // kShort + kDateTimeOffset = 12 189 190 // relative dates 191 kRelative = (1 << 7), 192 193 kFullRelative = (kFull | kRelative), 194 195 kLongRelative = kLong | kRelative, 196 197 kMediumRelative = kMedium | kRelative, 198 199 kShortRelative = kShort | kRelative, 200 201 202 kDefault = kMedium, 203 204 205 206 /** 207 * These constants are provided for backwards compatibility only. 208 * Please use the C++ style constants defined above. 209 */ 210 FULL = kFull, 211 LONG = kLong, 212 MEDIUM = kMedium, 213 SHORT = kShort, 214 DEFAULT = kDefault, 215 DATE_OFFSET = kDateOffset, 216 NONE = kNone, 217 DATE_TIME = kDateTime 218 }; 219 220 /** 221 * Destructor. 222 * @stable ICU 2.0 223 */ 224 virtual ~DateFormat(); 225 226 /** 227 * Clones this object polymorphically. 228 * The caller owns the result and should delete it when done. 229 * @return clone, or nullptr if an error occurred 230 * @stable ICU 2.0 231 */ 232 virtual DateFormat* clone() const = 0; 233 234 /** 235 * Equality operator. Returns true if the two formats have the same behavior. 236 * @stable ICU 2.0 237 */ 238 virtual UBool operator==(const Format&) const; 239 240 241 using Format::format; 242 243 /** 244 * Format an object to produce a string. This method handles Formattable 245 * objects with a UDate type. If a the Formattable object type is not a Date, 246 * then it returns a failing UErrorCode. 247 * 248 * @param obj The object to format. Must be a Date. 249 * @param appendTo Output parameter to receive result. 250 * Result is appended to existing contents. 251 * @param pos On input: an alignment field, if desired. 252 * On output: the offsets of the alignment field. 253 * @param status Output param filled with success/failure status. 254 * @return Reference to 'appendTo' parameter. 255 * @stable ICU 2.0 256 */ 257 virtual UnicodeString& format(const Formattable& obj, 258 UnicodeString& appendTo, 259 FieldPosition& pos, 260 UErrorCode& status) const; 261 262 /** 263 * Format an object to produce a string. This method handles Formattable 264 * objects with a UDate type. If a the Formattable object type is not a Date, 265 * then it returns a failing UErrorCode. 266 * 267 * @param obj The object to format. Must be a Date. 268 * @param appendTo Output parameter to receive result. 269 * Result is appended to existing contents. 270 * @param posIter On return, can be used to iterate over positions 271 * of fields generated by this format call. Field values 272 * are defined in UDateFormatField. Can be NULL. 273 * @param status Output param filled with success/failure status. 274 * @return Reference to 'appendTo' parameter. 275 * @stable ICU 4.4 276 */ 277 virtual UnicodeString& format(const Formattable& obj, 278 UnicodeString& appendTo, 279 FieldPositionIterator* posIter, 280 UErrorCode& status) const; 281 /** 282 * Formats a date into a date/time string. This is an abstract method which 283 * concrete subclasses must implement. 284 * <P> 285 * On input, the FieldPosition parameter may have its "field" member filled with 286 * an enum value specifying a field. On output, the FieldPosition will be filled 287 * in with the text offsets for that field. 288 * <P> For example, given a time text 289 * "1996.07.10 AD at 15:08:56 PDT", if the given fieldPosition.field is 290 * UDAT_YEAR_FIELD, the offsets fieldPosition.beginIndex and 291 * statfieldPositionus.getEndIndex will be set to 0 and 4, respectively. 292 * <P> Notice 293 * that if the same time field appears more than once in a pattern, the status will 294 * be set for the first occurence of that time field. For instance, 295 * formatting a UDate to the time string "1 PM PDT (Pacific Daylight Time)" 296 * using the pattern "h a z (zzzz)" and the alignment field 297 * DateFormat::TIMEZONE_FIELD, the offsets fieldPosition.beginIndex and 298 * fieldPosition.getEndIndex will be set to 5 and 8, respectively, for the first 299 * occurence of the timezone pattern character 'z'. 300 * 301 * @param cal Calendar set to the date and time to be formatted 302 * into a date/time string. When the calendar type is 303 * different from the internal calendar held by this 304 * DateFormat instance, the date and the time zone will 305 * be inherited from the input calendar, but other calendar 306 * field values will be calculated by the internal calendar. 307 * @param appendTo Output parameter to receive result. 308 * Result is appended to existing contents. 309 * @param fieldPosition On input: an alignment field, if desired (see examples above) 310 * On output: the offsets of the alignment field (see examples above) 311 * @return Reference to 'appendTo' parameter. 312 * @stable ICU 2.1 313 */ 314 virtual UnicodeString& format( Calendar& cal, 315 UnicodeString& appendTo, 316 FieldPosition& fieldPosition) const = 0; 317 318 /** 319 * Formats a date into a date/time string. Subclasses should implement this method. 320 * 321 * @param cal Calendar set to the date and time to be formatted 322 * into a date/time string. When the calendar type is 323 * different from the internal calendar held by this 324 * DateFormat instance, the date and the time zone will 325 * be inherited from the input calendar, but other calendar 326 * field values will be calculated by the internal calendar. 327 * @param appendTo Output parameter to receive result. 328 * Result is appended to existing contents. 329 * @param posIter On return, can be used to iterate over positions 330 * of fields generated by this format call. Field values 331 * are defined in UDateFormatField. Can be NULL. 332 * @param status error status. 333 * @return Reference to 'appendTo' parameter. 334 * @stable ICU 4.4 335 */ 336 virtual UnicodeString& format(Calendar& cal, 337 UnicodeString& appendTo, 338 FieldPositionIterator* posIter, 339 UErrorCode& status) const; 340 /** 341 * Formats a UDate into a date/time string. 342 * <P> 343 * On input, the FieldPosition parameter may have its "field" member filled with 344 * an enum value specifying a field. On output, the FieldPosition will be filled 345 * in with the text offsets for that field. 346 * <P> For example, given a time text 347 * "1996.07.10 AD at 15:08:56 PDT", if the given fieldPosition.field is 348 * UDAT_YEAR_FIELD, the offsets fieldPosition.beginIndex and 349 * statfieldPositionus.getEndIndex will be set to 0 and 4, respectively. 350 * <P> Notice 351 * that if the same time field appears more than once in a pattern, the status will 352 * be set for the first occurence of that time field. For instance, 353 * formatting a UDate to the time string "1 PM PDT (Pacific Daylight Time)" 354 * using the pattern "h a z (zzzz)" and the alignment field 355 * DateFormat::TIMEZONE_FIELD, the offsets fieldPosition.beginIndex and 356 * fieldPosition.getEndIndex will be set to 5 and 8, respectively, for the first 357 * occurence of the timezone pattern character 'z'. 358 * 359 * @param date UDate to be formatted into a date/time string. 360 * @param appendTo Output parameter to receive result. 361 * Result is appended to existing contents. 362 * @param fieldPosition On input: an alignment field, if desired (see examples above) 363 * On output: the offsets of the alignment field (see examples above) 364 * @return Reference to 'appendTo' parameter. 365 * @stable ICU 2.0 366 */ 367 UnicodeString& format( UDate date, 368 UnicodeString& appendTo, 369 FieldPosition& fieldPosition) const; 370 371 /** 372 * Formats a UDate into a date/time string. 373 * 374 * @param date UDate to be formatted into a date/time string. 375 * @param appendTo Output parameter to receive result. 376 * Result is appended to existing contents. 377 * @param posIter On return, can be used to iterate over positions 378 * of fields generated by this format call. Field values 379 * are defined in UDateFormatField. Can be NULL. 380 * @param status error status. 381 * @return Reference to 'appendTo' parameter. 382 * @stable ICU 4.4 383 */ 384 UnicodeString& format(UDate date, 385 UnicodeString& appendTo, 386 FieldPositionIterator* posIter, 387 UErrorCode& status) const; 388 /** 389 * Formats a UDate into a date/time string. If there is a problem, you won't 390 * know, using this method. Use the overloaded format() method which takes a 391 * FieldPosition& to detect formatting problems. 392 * 393 * @param date The UDate value to be formatted into a string. 394 * @param appendTo Output parameter to receive result. 395 * Result is appended to existing contents. 396 * @return Reference to 'appendTo' parameter. 397 * @stable ICU 2.0 398 */ 399 UnicodeString& format(UDate date, UnicodeString& appendTo) const; 400 401 /** 402 * Parse a date/time string. For example, a time text "07/10/96 4:5 PM, PDT" 403 * will be parsed into a UDate that is equivalent to Date(837039928046). 404 * Parsing begins at the beginning of the string and proceeds as far as 405 * possible. Assuming no parse errors were encountered, this function 406 * doesn't return any information about how much of the string was consumed 407 * by the parsing. If you need that information, use the version of 408 * parse() that takes a ParsePosition. 409 * <P> 410 * By default, parsing is lenient: If the input is not in the form used by 411 * this object's format method but can still be parsed as a date, then the 412 * parse succeeds. Clients may insist on strict adherence to the format by 413 * calling setLenient(false). 414 * @see DateFormat::setLenient(boolean) 415 * <P> 416 * Note that the normal date formats associated with some calendars - such 417 * as the Chinese lunar calendar - do not specify enough fields to enable 418 * dates to be parsed unambiguously. In the case of the Chinese lunar 419 * calendar, while the year within the current 60-year cycle is specified, 420 * the number of such cycles since the start date of the calendar (in the 421 * ERA field of the Calendar object) is not normally part of the format, 422 * and parsing may assume the wrong era. For cases such as this it is 423 * recommended that clients parse using the method 424 * parse(const UnicodeString&, Calendar& cal, ParsePosition&) 425 * with the Calendar passed in set to the current date, or to a date 426 * within the era/cycle that should be assumed if absent in the format. 427 * 428 * @param text The date/time string to be parsed into a UDate value. 429 * @param status Output param to be set to success/failure code. If 430 * 'text' cannot be parsed, it will be set to a failure 431 * code. 432 * @return The parsed UDate value, if successful. 433 * @stable ICU 2.0 434 */ 435 virtual UDate parse( const UnicodeString& text, 436 UErrorCode& status) const; 437 438 /** 439 * Parse a date/time string beginning at the given parse position. For 440 * example, a time text "07/10/96 4:5 PM, PDT" will be parsed into a Date 441 * that is equivalent to Date(837039928046). 442 * <P> 443 * By default, parsing is lenient: If the input is not in the form used by 444 * this object's format method but can still be parsed as a date, then the 445 * parse succeeds. Clients may insist on strict adherence to the format by 446 * calling setLenient(false). 447 * @see DateFormat::setLenient(boolean) 448 * 449 * @param text The date/time string to be parsed. 450 * @param cal A Calendar set on input to the date and time to be used for 451 * missing values in the date/time string being parsed, and set 452 * on output to the parsed date/time. When the calendar type is 453 * different from the internal calendar held by this DateFormat 454 * instance, the internal calendar will be cloned to a work 455 * calendar set to the same milliseconds and time zone as the 456 * cal parameter, field values will be parsed based on the work 457 * calendar, then the result (milliseconds and time zone) will 458 * be set in this calendar. 459 * @param pos On input, the position at which to start parsing; on 460 * output, the position at which parsing terminated, or the 461 * start position if the parse failed. 462 * @stable ICU 2.1 463 */ 464 virtual void parse( const UnicodeString& text, 465 Calendar& cal, 466 ParsePosition& pos) const = 0; 467 468 /** 469 * Parse a date/time string beginning at the given parse position. For 470 * example, a time text "07/10/96 4:5 PM, PDT" will be parsed into a Date 471 * that is equivalent to Date(837039928046). 472 * <P> 473 * By default, parsing is lenient: If the input is not in the form used by 474 * this object's format method but can still be parsed as a date, then the 475 * parse succeeds. Clients may insist on strict adherence to the format by 476 * calling setLenient(false). 477 * @see DateFormat::setLenient(boolean) 478 * <P> 479 * Note that the normal date formats associated with some calendars - such 480 * as the Chinese lunar calendar - do not specify enough fields to enable 481 * dates to be parsed unambiguously. In the case of the Chinese lunar 482 * calendar, while the year within the current 60-year cycle is specified, 483 * the number of such cycles since the start date of the calendar (in the 484 * ERA field of the Calendar object) is not normally part of the format, 485 * and parsing may assume the wrong era. For cases such as this it is 486 * recommended that clients parse using the method 487 * parse(const UnicodeString&, Calendar& cal, ParsePosition&) 488 * with the Calendar passed in set to the current date, or to a date 489 * within the era/cycle that should be assumed if absent in the format. 490 * 491 * @param text The date/time string to be parsed into a UDate value. 492 * @param pos On input, the position at which to start parsing; on 493 * output, the position at which parsing terminated, or the 494 * start position if the parse failed. 495 * @return A valid UDate if the input could be parsed. 496 * @stable ICU 2.0 497 */ 498 UDate parse( const UnicodeString& text, 499 ParsePosition& pos) const; 500 501 /** 502 * Parse a string to produce an object. This methods handles parsing of 503 * date/time strings into Formattable objects with UDate types. 504 * <P> 505 * Before calling, set parse_pos.index to the offset you want to start 506 * parsing at in the source. After calling, parse_pos.index is the end of 507 * the text you parsed. If error occurs, index is unchanged. 508 * <P> 509 * When parsing, leading whitespace is discarded (with a successful parse), 510 * while trailing whitespace is left as is. 511 * <P> 512 * See Format::parseObject() for more. 513 * 514 * @param source The string to be parsed into an object. 515 * @param result Formattable to be set to the parse result. 516 * If parse fails, return contents are undefined. 517 * @param parse_pos The position to start parsing at. Upon return 518 * this param is set to the position after the 519 * last character successfully parsed. If the 520 * source is not parsed successfully, this param 521 * will remain unchanged. 522 * @stable ICU 2.0 523 */ 524 virtual void parseObject(const UnicodeString& source, 525 Formattable& result, 526 ParsePosition& parse_pos) const; 527 528 /** 529 * Create a default date/time formatter that uses the SHORT style for both 530 * the date and the time. 531 * 532 * @return A date/time formatter which the caller owns. 533 * @stable ICU 2.0 534 */ 535 static DateFormat* U_EXPORT2 createInstance(void); 536 537 /** 538 * Creates a time formatter with the given formatting style for the given 539 * locale. 540 * 541 * @param style The given formatting style. For example, 542 * SHORT for "h:mm a" in the US locale. Relative 543 * time styles are not currently supported. 544 * @param aLocale The given locale. 545 * @return A time formatter which the caller owns. 546 * @stable ICU 2.0 547 */ 548 static DateFormat* U_EXPORT2 createTimeInstance(EStyle style = kDefault, 549 const Locale& aLocale = Locale::getDefault()); 550 551 /** 552 * Creates a date formatter with the given formatting style for the given 553 * const locale. 554 * 555 * @param style The given formatting style. For example, SHORT for "M/d/yy" in the 556 * US locale. As currently implemented, relative date formatting only 557 * affects a limited range of calendar days before or after the 558 * current date, based on the CLDR <field type="day">/<relative> data: 559 * For example, in English, "Yesterday", "Today", and "Tomorrow". 560 * Outside of this range, dates are formatted using the corresponding 561 * non-relative style. 562 * @param aLocale The given locale. 563 * @return A date formatter which the caller owns. 564 * @stable ICU 2.0 565 */ 566 static DateFormat* U_EXPORT2 createDateInstance(EStyle style = kDefault, 567 const Locale& aLocale = Locale::getDefault()); 568 569 /** 570 * Creates a date/time formatter with the given formatting styles for the 571 * given locale. 572 * 573 * @param dateStyle The given formatting style for the date portion of the result. 574 * For example, SHORT for "M/d/yy" in the US locale. As currently 575 * implemented, relative date formatting only affects a limited range 576 * of calendar days before or after the current date, based on the 577 * CLDR <field type="day">/<relative> data: For example, in English, 578 * "Yesterday", "Today", and "Tomorrow". Outside of this range, dates 579 * are formatted using the corresponding non-relative style. 580 * @param timeStyle The given formatting style for the time portion of the result. 581 * For example, SHORT for "h:mm a" in the US locale. Relative 582 * time styles are not currently supported. 583 * @param aLocale The given locale. 584 * @return A date/time formatter which the caller owns. 585 * @stable ICU 2.0 586 */ 587 static DateFormat* U_EXPORT2 createDateTimeInstance(EStyle dateStyle = kDefault, 588 EStyle timeStyle = kDefault, 589 const Locale& aLocale = Locale::getDefault()); 590 591 #ifndef U_HIDE_INTERNAL_API 592 /** 593 * Returns the best pattern given a skeleton and locale. 594 * @param locale the locale 595 * @param skeleton the skeleton 596 * @param status ICU error returned here 597 * @return the best pattern. 598 * @internal For ICU use only. 599 */ 600 static UnicodeString getBestPattern( 601 const Locale &locale, 602 const UnicodeString &skeleton, 603 UErrorCode &status); 604 #endif /* U_HIDE_INTERNAL_API */ 605 606 /** 607 * Creates a date/time formatter for the given skeleton and 608 * default locale. 609 * 610 * @param skeleton The skeleton e.g "yMMMMd." Fields in the skeleton can 611 * be in any order, and this method uses the locale to 612 * map the skeleton to a pattern that includes locale 613 * specific separators with the fields in the appropriate 614 * order for that locale. 615 * @param status Any error returned here. 616 * @return A date/time formatter which the caller owns. 617 * @stable ICU 55 618 */ 619 static DateFormat* U_EXPORT2 createInstanceForSkeleton( 620 const UnicodeString& skeleton, 621 UErrorCode &status); 622 623 /** 624 * Creates a date/time formatter for the given skeleton and locale. 625 * 626 * @param skeleton The skeleton e.g "yMMMMd." Fields in the skeleton can 627 * be in any order, and this method uses the locale to 628 * map the skeleton to a pattern that includes locale 629 * specific separators with the fields in the appropriate 630 * order for that locale. 631 * @param locale The given locale. 632 * @param status Any error returned here. 633 * @return A date/time formatter which the caller owns. 634 * @stable ICU 55 635 */ 636 static DateFormat* U_EXPORT2 createInstanceForSkeleton( 637 const UnicodeString& skeleton, 638 const Locale &locale, 639 UErrorCode &status); 640 641 /** 642 * Creates a date/time formatter for the given skeleton and locale. 643 * 644 * @param calendarToAdopt the calendar returned DateFormat is to use. 645 * @param skeleton The skeleton e.g "yMMMMd." Fields in the skeleton can 646 * be in any order, and this method uses the locale to 647 * map the skeleton to a pattern that includes locale 648 * specific separators with the fields in the appropriate 649 * order for that locale. 650 * @param locale The given locale. 651 * @param status Any error returned here. 652 * @return A date/time formatter which the caller owns. 653 * @stable ICU 55 654 */ 655 static DateFormat* U_EXPORT2 createInstanceForSkeleton( 656 Calendar *calendarToAdopt, 657 const UnicodeString& skeleton, 658 const Locale &locale, 659 UErrorCode &status); 660 661 662 /** 663 * Gets the set of locales for which DateFormats are installed. 664 * @param count Filled in with the number of locales in the list that is returned. 665 * @return the set of locales for which DateFormats are installed. The caller 666 * does NOT own this list and must not delete it. 667 * @stable ICU 2.0 668 */ 669 static const Locale* U_EXPORT2 getAvailableLocales(int32_t& count); 670 671 /** 672 * Returns whether both date/time parsing in the encapsulated Calendar object and DateFormat whitespace & 673 * numeric processing is lenient. 674 * @stable ICU 2.0 675 */ 676 virtual UBool isLenient(void) const; 677 678 /** 679 * Specifies whether date/time parsing is to be lenient. With 680 * lenient parsing, the parser may use heuristics to interpret inputs that 681 * do not precisely match this object's format. Without lenient parsing, 682 * inputs must match this object's format more closely. 683 * 684 * Note: ICU 53 introduced finer grained control of leniency (and added 685 * new control points) making the preferred method a combination of 686 * setCalendarLenient() & setBooleanAttribute() calls. 687 * This method supports prior functionality but may not support all 688 * future leniency control & behavior of DateFormat. For control of pre 53 leniency, 689 * Calendar and DateFormat whitespace & numeric tolerance, this method is safe to 690 * use. However, mixing leniency control via this method and modification of the 691 * newer attributes via setBooleanAttribute() may produce undesirable 692 * results. 693 * 694 * @param lenient True specifies date/time interpretation to be lenient. 695 * @see Calendar::setLenient 696 * @stable ICU 2.0 697 */ 698 virtual void setLenient(UBool lenient); 699 700 701 /** 702 * Returns whether date/time parsing in the encapsulated Calendar object processing is lenient. 703 * @stable ICU 53 704 */ 705 virtual UBool isCalendarLenient(void) const; 706 707 708 /** 709 * Specifies whether encapsulated Calendar date/time parsing is to be lenient. With 710 * lenient parsing, the parser may use heuristics to interpret inputs that 711 * do not precisely match this object's format. Without lenient parsing, 712 * inputs must match this object's format more closely. 713 * @param lenient when true, parsing is lenient 714 * @see com.ibm.icu.util.Calendar#setLenient 715 * @stable ICU 53 716 */ 717 virtual void setCalendarLenient(UBool lenient); 718 719 720 /** 721 * Gets the calendar associated with this date/time formatter. 722 * The calendar is owned by the formatter and must not be modified. 723 * Also, the calendar does not reflect the results of a parse operation. 724 * To parse to a calendar, use {@link #parse(const UnicodeString&, Calendar& cal, ParsePosition&) const parse(const UnicodeString&, Calendar& cal, ParsePosition&)} 725 * @return the calendar associated with this date/time formatter. 726 * @stable ICU 2.0 727 */ 728 virtual const Calendar* getCalendar(void) const; 729 730 /** 731 * Set the calendar to be used by this date format. Initially, the default 732 * calendar for the specified or default locale is used. The caller should 733 * not delete the Calendar object after it is adopted by this call. 734 * Adopting a new calendar will change to the default symbols. 735 * 736 * @param calendarToAdopt Calendar object to be adopted. 737 * @stable ICU 2.0 738 */ 739 virtual void adoptCalendar(Calendar* calendarToAdopt); 740 741 /** 742 * Set the calendar to be used by this date format. Initially, the default 743 * calendar for the specified or default locale is used. 744 * 745 * @param newCalendar Calendar object to be set. 746 * @stable ICU 2.0 747 */ 748 virtual void setCalendar(const Calendar& newCalendar); 749 750 751 /** 752 * Gets the number formatter which this date/time formatter uses to format 753 * and parse the numeric portions of the pattern. 754 * @return the number formatter which this date/time formatter uses. 755 * @stable ICU 2.0 756 */ 757 virtual const NumberFormat* getNumberFormat(void) const; 758 759 /** 760 * Allows you to set the number formatter. The caller should 761 * not delete the NumberFormat object after it is adopted by this call. 762 * @param formatToAdopt NumberFormat object to be adopted. 763 * @stable ICU 2.0 764 */ 765 virtual void adoptNumberFormat(NumberFormat* formatToAdopt); 766 767 /** 768 * Allows you to set the number formatter. 769 * @param newNumberFormat NumberFormat object to be set. 770 * @stable ICU 2.0 771 */ 772 virtual void setNumberFormat(const NumberFormat& newNumberFormat); 773 774 /** 775 * Returns a reference to the TimeZone used by this DateFormat's calendar. 776 * @return the time zone associated with the calendar of DateFormat. 777 * @stable ICU 2.0 778 */ 779 virtual const TimeZone& getTimeZone(void) const; 780 781 /** 782 * Sets the time zone for the calendar of this DateFormat object. The caller 783 * no longer owns the TimeZone object and should not delete it after this call. 784 * @param zoneToAdopt the TimeZone to be adopted. 785 * @stable ICU 2.0 786 */ 787 virtual void adoptTimeZone(TimeZone* zoneToAdopt); 788 789 /** 790 * Sets the time zone for the calendar of this DateFormat object. 791 * @param zone the new time zone. 792 * @stable ICU 2.0 793 */ 794 virtual void setTimeZone(const TimeZone& zone); 795 796 /** 797 * Set a particular UDisplayContext value in the formatter, such as 798 * UDISPCTX_CAPITALIZATION_FOR_STANDALONE. 799 * @param value The UDisplayContext value to set. 800 * @param status Input/output status. If at entry this indicates a failure 801 * status, the function will do nothing; otherwise this will be 802 * updated with any new status from the function. 803 * @stable ICU 53 804 */ 805 virtual void setContext(UDisplayContext value, UErrorCode& status); 806 807 /** 808 * Get the formatter's UDisplayContext value for the specified UDisplayContextType, 809 * such as UDISPCTX_TYPE_CAPITALIZATION. 810 * @param type The UDisplayContextType whose value to return 811 * @param status Input/output status. If at entry this indicates a failure 812 * status, the function will do nothing; otherwise this will be 813 * updated with any new status from the function. 814 * @return The UDisplayContextValue for the specified type. 815 * @stable ICU 53 816 */ 817 virtual UDisplayContext getContext(UDisplayContextType type, UErrorCode& status) const; 818 819 /** 820 * Sets an boolean attribute on this DateFormat. 821 * May return U_UNSUPPORTED_ERROR if this instance does not support 822 * the specified attribute. 823 * @param attr the attribute to set 824 * @param newvalue new value 825 * @param status the error type 826 * @return *this - for chaining (example: format.setAttribute(...).setAttribute(...) ) 827 * @stable ICU 53 828 */ 829 830 virtual DateFormat& U_EXPORT2 setBooleanAttribute(UDateFormatBooleanAttribute attr, 831 UBool newvalue, 832 UErrorCode &status); 833 834 /** 835 * Returns a boolean from this DateFormat 836 * May return U_UNSUPPORTED_ERROR if this instance does not support 837 * the specified attribute. 838 * @param attr the attribute to set 839 * @param status the error type 840 * @return the attribute value. Undefined if there is an error. 841 * @stable ICU 53 842 */ 843 virtual UBool U_EXPORT2 getBooleanAttribute(UDateFormatBooleanAttribute attr, UErrorCode &status) const; 844 845 protected: 846 /** 847 * Default constructor. Creates a DateFormat with no Calendar or NumberFormat 848 * associated with it. This constructor depends on the subclasses to fill in 849 * the calendar and numberFormat fields. 850 * @stable ICU 2.0 851 */ 852 DateFormat(); 853 854 /** 855 * Copy constructor. 856 * @stable ICU 2.0 857 */ 858 DateFormat(const DateFormat&); 859 860 /** 861 * Default assignment operator. 862 * @stable ICU 2.0 863 */ 864 DateFormat& operator=(const DateFormat&); 865 866 /** 867 * The calendar that DateFormat uses to produce the time field values needed 868 * to implement date/time formatting. Subclasses should generally initialize 869 * this to the default calendar for the locale associated with this DateFormat. 870 * @stable ICU 2.4 871 */ 872 Calendar* fCalendar; 873 874 /** 875 * The number formatter that DateFormat uses to format numbers in dates and 876 * times. Subclasses should generally initialize this to the default number 877 * format for the locale associated with this DateFormat. 878 * @stable ICU 2.4 879 */ 880 NumberFormat* fNumberFormat; 881 882 883 private: 884 885 /** 886 * Gets the date/time formatter with the given formatting styles for the 887 * given locale. 888 * @param dateStyle the given date formatting style. 889 * @param timeStyle the given time formatting style. 890 * @param inLocale the given locale. 891 * @return a date/time formatter, or 0 on failure. 892 */ 893 static DateFormat* U_EXPORT2 create(EStyle timeStyle, EStyle dateStyle, const Locale& inLocale); 894 895 896 /** 897 * enum set of active boolean attributes for this instance 898 */ 899 EnumSet<UDateFormatBooleanAttribute, 0, UDAT_BOOLEAN_ATTRIBUTE_COUNT> fBoolFlags; 900 901 902 UDisplayContext fCapitalizationContext; 903 friend class DateFmtKeyByStyle; 904 905 public: 906 #ifndef U_HIDE_OBSOLETE_API 907 /** 908 * Field selector for FieldPosition for DateFormat fields. 909 * @obsolete ICU 3.4 use UDateFormatField instead, since this API will be 910 * removed in that release 911 */ 912 enum EField 913 { 914 // Obsolete; use UDateFormatField instead 915 kEraField = UDAT_ERA_FIELD, 916 kYearField = UDAT_YEAR_FIELD, 917 kMonthField = UDAT_MONTH_FIELD, 918 kDateField = UDAT_DATE_FIELD, 919 kHourOfDay1Field = UDAT_HOUR_OF_DAY1_FIELD, 920 kHourOfDay0Field = UDAT_HOUR_OF_DAY0_FIELD, 921 kMinuteField = UDAT_MINUTE_FIELD, 922 kSecondField = UDAT_SECOND_FIELD, 923 kMillisecondField = UDAT_FRACTIONAL_SECOND_FIELD, 924 kDayOfWeekField = UDAT_DAY_OF_WEEK_FIELD, 925 kDayOfYearField = UDAT_DAY_OF_YEAR_FIELD, 926 kDayOfWeekInMonthField = UDAT_DAY_OF_WEEK_IN_MONTH_FIELD, 927 kWeekOfYearField = UDAT_WEEK_OF_YEAR_FIELD, 928 kWeekOfMonthField = UDAT_WEEK_OF_MONTH_FIELD, 929 kAmPmField = UDAT_AM_PM_FIELD, 930 kHour1Field = UDAT_HOUR1_FIELD, 931 kHour0Field = UDAT_HOUR0_FIELD, 932 kTimezoneField = UDAT_TIMEZONE_FIELD, 933 kYearWOYField = UDAT_YEAR_WOY_FIELD, 934 kDOWLocalField = UDAT_DOW_LOCAL_FIELD, 935 kExtendedYearField = UDAT_EXTENDED_YEAR_FIELD, 936 kJulianDayField = UDAT_JULIAN_DAY_FIELD, 937 kMillisecondsInDayField = UDAT_MILLISECONDS_IN_DAY_FIELD, 938 939 // Obsolete; use UDateFormatField instead 940 ERA_FIELD = UDAT_ERA_FIELD, 941 YEAR_FIELD = UDAT_YEAR_FIELD, 942 MONTH_FIELD = UDAT_MONTH_FIELD, 943 DATE_FIELD = UDAT_DATE_FIELD, 944 HOUR_OF_DAY1_FIELD = UDAT_HOUR_OF_DAY1_FIELD, 945 HOUR_OF_DAY0_FIELD = UDAT_HOUR_OF_DAY0_FIELD, 946 MINUTE_FIELD = UDAT_MINUTE_FIELD, 947 SECOND_FIELD = UDAT_SECOND_FIELD, 948 MILLISECOND_FIELD = UDAT_FRACTIONAL_SECOND_FIELD, 949 DAY_OF_WEEK_FIELD = UDAT_DAY_OF_WEEK_FIELD, 950 DAY_OF_YEAR_FIELD = UDAT_DAY_OF_YEAR_FIELD, 951 DAY_OF_WEEK_IN_MONTH_FIELD = UDAT_DAY_OF_WEEK_IN_MONTH_FIELD, 952 WEEK_OF_YEAR_FIELD = UDAT_WEEK_OF_YEAR_FIELD, 953 WEEK_OF_MONTH_FIELD = UDAT_WEEK_OF_MONTH_FIELD, 954 AM_PM_FIELD = UDAT_AM_PM_FIELD, 955 HOUR1_FIELD = UDAT_HOUR1_FIELD, 956 HOUR0_FIELD = UDAT_HOUR0_FIELD, 957 TIMEZONE_FIELD = UDAT_TIMEZONE_FIELD 958 }; 959 #endif /* U_HIDE_OBSOLETE_API */ 960 }; 961 962 U_NAMESPACE_END 963 964 #endif /* #if !UCONFIG_NO_FORMATTING */ 965 966 #endif /* U_SHOW_CPLUSPLUS_API */ 967 968 #endif // _DATEFMT 969 //eof 970