icuSources/i18n/unicode/datefmt.h

   1 /*
   2  ********************************************************************************
   3  *   Copyright (C) 1997-2008, International Business Machines
   4  *   Corporation and others.  All Rights Reserved.
   5  ********************************************************************************
   6  *
   7  * File DATEFMT.H
   8  *
   9  * Modification History:
  10  *
  11  *   Date        Name        Description
  12  *   02/19/97    aliu        Converted from java.
  13  *   04/01/97    aliu        Added support for centuries.
  14  *   07/23/98    stephen     JDK 1.2 sync
  15  *   11/15/99    weiv        Added support for week of year/day of week formatting
  16  ********************************************************************************
  17  */
  18
  19 #ifndef DATEFMT_H
  20 #define DATEFMT_H
  21
  22 #include "unicode/utypes.h"
  23
  24 #if !UCONFIG_NO_FORMATTING
  25
  26 #include "unicode/udat.h"
  27 #include "unicode/calendar.h"
  28 #include "unicode/numfmt.h"
  29 #include "unicode/format.h"
  30 #include "unicode/locid.h"
  31
  32 /**
  33  * \file
  34  * \brief C++ API: Abstract class for converting dates.
  35  */
  36
  37 U_NAMESPACE_BEGIN
  38
  39 class TimeZone;
  40
  41 /**
  42  * DateFormat is an abstract class for a family of classes that convert dates and
  43  * times from their internal representations to textual form and back again in a
  44  * language-independent manner. Converting from the internal representation (milliseconds
  45  * since midnight, January 1, 1970) to text is known as "formatting," and converting
  46  * from text to millis is known as "parsing."  We currently define only one concrete
  47  * subclass of DateFormat: SimpleDateFormat, which can handle pretty much all normal
  48  * date formatting and parsing actions.
  49  * <P>
  50  * DateFormat helps you to format and parse dates for any locale. Your code can
  51  * be completely independent of the locale conventions for months, days of the
  52  * week, or even the calendar format: lunar vs. solar.
  53  * <P>
  54  * To format a date for the current Locale, use one of the static factory
  55  * methods:
  56  * <pre>
  57  * \code
  58  *      DateFormat* dfmt = DateFormat::createDateInstance();
  59  *      UDate myDate = Calendar::getNow();
  60  *      UnicodeString myString;
  61  *      myString = dfmt->format( myDate, myString );
  62  * \endcode
  63  * </pre>
  64  * If you are formatting multiple numbers, it is more efficient to get the
  65  * format and use it multiple times so that the system doesn't have to fetch the
  66  * information about the local language and country conventions multiple times.
  67  * <pre>
  68  * \code
  69  *      DateFormat* df = DateFormat::createDateInstance();
  70  *      UnicodeString myString;
  71  *      UDate myDateArr[] = { 0.0, 100000000.0, 2000000000.0 }; // test values
  72  *      for (int32_t i = 0; i < 3; ++i) {
  73  *          myString.remove();
  74  *          cout << df->format( myDateArr[i], myString ) << endl;
  75  *      }
  76  * \endcode
  77  * </pre>
  78  * To get specific fields of a date, you can use UFieldPosition to
  79  * get specific fields.
  80  * <pre>
  81  * \code
  82  *      DateFormat* dfmt = DateFormat::createDateInstance();
  83  *      FieldPosition pos(DateFormat::YEAR_FIELD);
  84  *      UnicodeString myString;
  85  *      myString = dfmt->format( myDate, myString );
  86  *      cout << myString << endl;
  87  *      cout << pos.getBeginIndex() << "," << pos. getEndIndex() << endl;
  88  * \endcode
  89  * </pre>
  90  * To format a date for a different Locale, specify it in the call to
  91  * createDateInstance().
  92  * <pre>
  93  * \code
  94  *       DateFormat* df =
  95  *           DateFormat::createDateInstance( DateFormat::SHORT, Locale::getFrance());
  96  * \endcode
  97  * </pre>
  98  * You can use a DateFormat to parse also.
  99  * <pre>
 100  * \code
 101  *       UErrorCode status = U_ZERO_ERROR;
 102  *       UDate myDate = df->parse(myString, status);
 103  * \endcode
 104  * </pre>
 105  * Use createDateInstance() to produce the normal date format for that country.
 106  * There are other static factory methods available. Use createTimeInstance()
 107  * to produce the normal time format for that country. Use createDateTimeInstance()
 108  * to produce a DateFormat that formats both date and time. You can pass in
 109  * different options to these factory methods to control the length of the
 110  * result; from SHORT to MEDIUM to LONG to FULL. The exact result depends on the
 111  * locale, but generally:
 112  * <ul type=round>
 113  *   <li>   SHORT is completely numeric, such as 12/13/52 or 3:30pm
 114  *   <li>   MEDIUM is longer, such as Jan 12, 1952
 115  *   <li>   LONG is longer, such as January 12, 1952 or 3:30:32pm
 116  *   <li>   FULL is pretty completely specified, such as
 117  *          Tuesday, April 12, 1952 AD or 3:30:42pm PST.
 118  * </ul>
 119  * You can also set the time zone on the format if you wish. If you want even
 120  * more control over the format or parsing, (or want to give your users more
 121  * control), you can try casting the DateFormat you get from the factory methods
 122  * to a SimpleDateFormat. This will work for the majority of countries; just
 123  * remember to chck getDynamicClassID() before carrying out the cast.
 124  * <P>
 125  * You can also use forms of the parse and format methods with ParsePosition and
 126  * FieldPosition to allow you to
 127  * <ul type=round>
 128  *   <li>   Progressively parse through pieces of a string.
 129  *   <li>   Align any particular field, or find out where it is for selection
 130  *          on the screen.
 131  * </ul>
 132  *
 133  * <p><em>User subclasses are not supported.</em> While clients may write
 134  * subclasses, such code will not necessarily work and will not be
 135  * guaranteed to work stably from release to release.
 136  */
 137 class U_I18N_API DateFormat : public Format {
 138 public:
 139
 140     /**
 141      * Constants for various style patterns. These reflect the order of items in
 142      * the DateTimePatterns resource. There are 4 time patterns, 4 date patterns,
 143      * and then the date-time pattern. Each block of 4 values in the resource occurs
 144      * in the order full, long, medium, short.
 145      * @stable ICU 2.4
 146      */
 147     enum EStyle
 148     {
 149         kNone   = -1,
 150
 151         kFull   = 0,
 152         kLong   = 1,
 153         kMedium = 2,
 154         kShort  = 3,
 155
 156         kDateOffset   = kShort + 1,
 157      // kFull   + kDateOffset = 4
 158      // kLong   + kDateOffset = 5
 159      // kMedium + kDateOffset = 6
 160      // kShort  + kDateOffset = 7
 161
 162         kDateTime             = 8,
 163
 164
 165         // relative dates
 166         kRelative = (1 << 7),
 167
 168         kFullRelative = (kFull | kRelative),
 169
 170         kLongRelative = kLong | kRelative,
 171
 172         kMediumRelative = kMedium | kRelative,
 173
 174         kShortRelative = kShort | kRelative,
 175
 176
 177         kDefault      = kMedium,
 178
 179
 180
 181     /**
 182      * These constants are provided for backwards compatibility only.
 183      * Please use the C++ style constants defined above.
 184      */
 185         FULL        = kFull,
 186         LONG        = kLong,
 187         MEDIUM        = kMedium,
 188         SHORT        = kShort,
 189         DEFAULT        = kDefault,
 190         DATE_OFFSET    = kDateOffset,
 191         NONE        = kNone,
 192         DATE_TIME    = kDateTime
 193     };
 194
 195     /**
 196      * Destructor.
 197      * @stable ICU 2.0
 198      */
 199     virtual ~DateFormat();
 200
 201     /**
 202      * Equality operator.  Returns true if the two formats have the same behavior.
 203      * @stable ICU 2.0
 204      */
 205     virtual UBool operator==(const Format&) const;
 206
 207     /**
 208      * Format an object to produce a string. This method handles Formattable
 209      * objects with a UDate type. If a the Formattable object type is not a Date,
 210      * then it returns a failing UErrorCode.
 211      *
 212      * @param obj       The object to format. Must be a Date.
 213      * @param appendTo  Output parameter to receive result.
 214      *                  Result is appended to existing contents.
 215      * @param pos       On input: an alignment field, if desired.
 216      *                  On output: the offsets of the alignment field.
 217      * @param status    Output param filled with success/failure status.
 218      * @return          Reference to 'appendTo' parameter.
 219      * @stable ICU 2.0
 220      */
 221     virtual UnicodeString& format(const Formattable& obj,
 222                                   UnicodeString& appendTo,
 223                                   FieldPosition& pos,
 224                                   UErrorCode& status) const;
 225
 226     /**
 227      * Formats a date into a date/time string. This is an abstract method which
 228      * concrete subclasses must implement.
 229      * <P>
 230      * On input, the FieldPosition parameter may have its "field" member filled with
 231      * an enum value specifying a field.  On output, the FieldPosition will be filled
 232      * in with the text offsets for that field.
 233      * <P> For example, given a time text
 234      * "1996.07.10 AD at 15:08:56 PDT", if the given fieldPosition.field is
 235      * UDAT_YEAR_FIELD, the offsets fieldPosition.beginIndex and
 236      * statfieldPositionus.getEndIndex will be set to 0 and 4, respectively.
 237      * <P> Notice
 238      * that if the same time field appears more than once in a pattern, the status will
 239      * be set for the first occurence of that time field. For instance,
 240      * formatting a UDate to the time string "1 PM PDT (Pacific Daylight Time)"
 241      * using the pattern "h a z (zzzz)" and the alignment field
 242      * DateFormat::TIMEZONE_FIELD, the offsets fieldPosition.beginIndex and
 243      * fieldPosition.getEndIndex will be set to 5 and 8, respectively, for the first
 244      * occurence of the timezone pattern character 'z'.
 245      *
 246      * @param cal           Calendar set to the date and time to be formatted
 247      *                      into a date/time string.
 248      * @param appendTo      Output parameter to receive result.
 249      *                      Result is appended to existing contents.
 250      * @param fieldPosition On input: an alignment field, if desired (see examples above)
 251      *                      On output: the offsets of the alignment field (see examples above)
 252      * @return              Reference to 'appendTo' parameter.
 253      * @stable ICU 2.1
 254      */
 255     virtual UnicodeString& format(  Calendar& cal,
 256                                     UnicodeString& appendTo,
 257                                     FieldPosition& fieldPosition) const = 0;
 258
 259     /**
 260      * Formats a UDate into a date/time string.
 261      * <P>
 262      * On input, the FieldPosition parameter may have its "field" member filled with
 263      * an enum value specifying a field.  On output, the FieldPosition will be filled
 264      * in with the text offsets for that field.
 265      * <P> For example, given a time text
 266      * "1996.07.10 AD at 15:08:56 PDT", if the given fieldPosition.field is
 267      * UDAT_YEAR_FIELD, the offsets fieldPosition.beginIndex and
 268      * statfieldPositionus.getEndIndex will be set to 0 and 4, respectively.
 269      * <P> Notice
 270      * that if the same time field appears more than once in a pattern, the status will
 271      * be set for the first occurence of that time field. For instance,
 272      * formatting a UDate to the time string "1 PM PDT (Pacific Daylight Time)"
 273      * using the pattern "h a z (zzzz)" and the alignment field
 274      * DateFormat::TIMEZONE_FIELD, the offsets fieldPosition.beginIndex and
 275      * fieldPosition.getEndIndex will be set to 5 and 8, respectively, for the first
 276      * occurence of the timezone pattern character 'z'.
 277      *
 278      * @param date          UDate to be formatted into a date/time string.
 279      * @param appendTo      Output parameter to receive result.
 280      *                      Result is appended to existing contents.
 281      * @param fieldPosition On input: an alignment field, if desired (see examples above)
 282      *                      On output: the offsets of the alignment field (see examples above)
 283      * @return              Reference to 'appendTo' parameter.
 284      * @stable ICU 2.0
 285      */
 286     UnicodeString& format(  UDate date,
 287                             UnicodeString& appendTo,
 288                             FieldPosition& fieldPosition) const;
 289
 290     /**
 291      * Formats a UDate into a date/time string. If there is a problem, you won't
 292      * know, using this method. Use the overloaded format() method which takes a
 293      * FieldPosition& to detect formatting problems.
 294      *
 295      * @param date      The UDate value to be formatted into a string.
 296      * @param appendTo  Output parameter to receive result.
 297      *                  Result is appended to existing contents.
 298      * @return          Reference to 'appendTo' parameter.
 299      * @stable ICU 2.0
 300      */
 301     UnicodeString& format(UDate date, UnicodeString& appendTo) const;
 302
 303     /**
 304      * Redeclared Format method.
 305      *
 306      * @param obj       The object to be formatted into a string.
 307      * @param appendTo  Output parameter to receive result.
 308      *                  Result is appended to existing contents.
 309      * @param status    Output param filled with success/failure status.
 310      * @return          Reference to 'appendTo' parameter.
 311      * @stable ICU 2.0
 312      */
 313     UnicodeString& format(const Formattable& obj,
 314                           UnicodeString& appendTo,
 315                           UErrorCode& status) const;
 316
 317     /**
 318      * Parse a date/time string.
 319      *
 320      * @param text      The string to be parsed into a UDate value.
 321      * @param status    Output param to be set to success/failure code. If
 322      *                  'text' cannot be parsed, it will be set to a failure
 323      *                  code.
 324      * @result          The parsed UDate value, if successful.
 325      * @stable ICU 2.0
 326      */
 327     virtual UDate parse( const UnicodeString& text,
 328                         UErrorCode& status) const;
 329
 330     /**
 331      * Parse a date/time string beginning at the given parse position. For
 332      * example, a time text "07/10/96 4:5 PM, PDT" will be parsed into a Date
 333      * that is equivalent to Date(837039928046).
 334      * <P>
 335      * By default, parsing is lenient: If the input is not in the form used by
 336      * this object's format method but can still be parsed as a date, then the
 337      * parse succeeds. Clients may insist on strict adherence to the format by
 338      * calling setLenient(false).
 339      *
 340      * @see DateFormat::setLenient(boolean)
 341      *
 342      * @param text  The date/time string to be parsed
 343      * @param cal   a Calendar set to the date and time to be formatted
 344      *              into a date/time string.
 345      * @param pos   On input, the position at which to start parsing; on
 346      *              output, the position at which parsing terminated, or the
 347      *              start position if the parse failed.
 348      * @return      A valid UDate if the input could be parsed.
 349      * @stable ICU 2.1
 350      */
 351     virtual void parse( const UnicodeString& text,
 352                         Calendar& cal,
 353                         ParsePosition& pos) const = 0;
 354
 355     /**
 356      * Parse a date/time string beginning at the given parse position. For
 357      * example, a time text "07/10/96 4:5 PM, PDT" will be parsed into a Date
 358      * that is equivalent to Date(837039928046).
 359      * <P>
 360      * By default, parsing is lenient: If the input is not in the form used by
 361      * this object's format method but can still be parsed as a date, then the
 362      * parse succeeds. Clients may insist on strict adherence to the format by
 363      * calling setLenient(false).
 364      *
 365      * @see DateFormat::setLenient(boolean)
 366      *
 367      * @param text  The date/time string to be parsed
 368      * @param pos   On input, the position at which to start parsing; on
 369      *              output, the position at which parsing terminated, or the
 370      *              start position if the parse failed.
 371      * @return      A valid UDate if the input could be parsed.
 372      * @stable ICU 2.0
 373      */
 374     UDate parse( const UnicodeString& text,
 375                  ParsePosition& pos) const;
 376
 377     /**
 378      * Parse a string to produce an object. This methods handles parsing of
 379      * date/time strings into Formattable objects with UDate types.
 380      * <P>
 381      * Before calling, set parse_pos.index to the offset you want to start
 382      * parsing at in the source. After calling, parse_pos.index is the end of
 383      * the text you parsed. If error occurs, index is unchanged.
 384      * <P>
 385      * When parsing, leading whitespace is discarded (with a successful parse),
 386      * while trailing whitespace is left as is.
 387      * <P>
 388      * See Format::parseObject() for more.
 389      *
 390      * @param source    The string to be parsed into an object.
 391      * @param result    Formattable to be set to the parse result.
 392      *                  If parse fails, return contents are undefined.
 393      * @param parse_pos The position to start parsing at. Upon return
 394      *                  this param is set to the position after the
 395      *                  last character successfully parsed. If the
 396      *                  source is not parsed successfully, this param
 397      *                  will remain unchanged.
 398      * @return          A newly created Formattable* object, or NULL
 399      *                  on failure.  The caller owns this and should
 400      *                  delete it when done.
 401      * @stable ICU 2.0
 402      */
 403     virtual void parseObject(const UnicodeString& source,
 404                              Formattable& result,
 405                              ParsePosition& parse_pos) const;
 406
 407     /**
 408      * Create a default date/time formatter that uses the SHORT style for both
 409      * the date and the time.
 410      *
 411      * @return A date/time formatter which the caller owns.
 412      * @stable ICU 2.0
 413      */
 414     static DateFormat* U_EXPORT2 createInstance(void);
 415
 416     /**
 417      * This is for ICU internal use only. Please do not use.
 418      * Create a date/time formatter from skeleton and a given locale.
 419      *
 420      * Users are encouraged to use the skeleton macros defined in udat.h.
 421      * For example, MONTH_WEEKDAY_DAY, which is "MMMMEEEEd",
 422      * and which means the pattern should have day, month, and day-of-week
 423      * fields, and follow the long date format defined in date time pattern.
 424      * For example, for English, the full pattern should be
 425      * "EEEE, MMMM d".
 426      *
 427      * Temporarily, this is an internal API, used by DateIntevalFormat only.
 428      * There will be a new set of APIs for the same purpose coming soon.
 429      * After which, this API will be replaced.
 430      *
 431      * @param skeleton  the skeleton on which date format based.
 432      * @param locale    the given locale.
 433      * @param status    Output param to be set to success/failure code.
 434      *                  If it is failure, the returned date formatter will
 435      *                  be NULL.
 436      * @return          a simple date formatter which the caller owns.
 437      * @internal ICU 4.0
 438      */
 439     static DateFormat* U_EXPORT2 createPatternInstance(
 440                                                 const UnicodeString& skeleton,
 441                                                 const Locale& locale,
 442                                                 UErrorCode& status);
 443
 444     /**
 445      * Creates a time formatter with the given formatting style for the given
 446      * locale.
 447      *
 448      * @param style     The given formatting style. For example,
 449      *                  SHORT for "h:mm a" in the US locale.
 450      * @param aLocale   The given locale.
 451      * @return          A time formatter which the caller owns.
 452      * @stable ICU 2.0
 453      */
 454     static DateFormat* U_EXPORT2 createTimeInstance(EStyle style = kDefault,
 455                                           const Locale& aLocale = Locale::getDefault());
 456
 457     /**
 458      * Creates a date formatter with the given formatting style for the given
 459      * const locale.
 460      *
 461      * @param style     The given formatting style. For example,
 462      *                  SHORT for "M/d/yy" in the US locale.
 463      * @param aLocale   The given locale.
 464      * @return          A date formatter which the caller owns.
 465      * @stable ICU 2.0
 466      */
 467     static DateFormat* U_EXPORT2 createDateInstance(EStyle style = kDefault,
 468                                           const Locale& aLocale = Locale::getDefault());
 469
 470     /**
 471      * Creates a date/time formatter with the given formatting styles for the
 472      * given locale.
 473      *
 474      * @param dateStyle The given formatting style for the date portion of the result.
 475      *                  For example, SHORT for "M/d/yy" in the US locale.
 476      * @param timeStyle The given formatting style for the time portion of the result.
 477      *                  For example, SHORT for "h:mm a" in the US locale.
 478      * @param aLocale   The given locale.
 479      * @return          A date/time formatter which the caller owns.
 480      * @stable ICU 2.0
 481      */
 482     static DateFormat* U_EXPORT2 createDateTimeInstance(EStyle dateStyle = kDefault,
 483                                               EStyle timeStyle = kDefault,
 484                                               const Locale& aLocale = Locale::getDefault());
 485
 486     /**
 487      * Gets the set of locales for which DateFormats are installed.
 488      * @param count Filled in with the number of locales in the list that is returned.
 489      * @return the set of locales for which DateFormats are installed.  The caller
 490      *  does NOT own this list and must not delete it.
 491      * @stable ICU 2.0
 492      */
 493     static const Locale* U_EXPORT2 getAvailableLocales(int32_t& count);
 494
 495     /**
 496      * Returns true if the formatter is set for lenient parsing.
 497      * @stable ICU 2.0
 498      */
 499     virtual UBool isLenient(void) const;
 500
 501     /**
 502      * Specify whether or not date/time parsing is to be lenient. With lenient
 503      * parsing, the parser may use heuristics to interpret inputs that do not
 504      * precisely match this object's format. With strict parsing, inputs must
 505      * match this object's format.
 506      *
 507      * @param lenient  True specifies date/time interpretation to be lenient.
 508      * @see Calendar::setLenient
 509      * @stable ICU 2.0
 510      */
 511     virtual void setLenient(UBool lenient);
 512
 513     /**
 514      * Gets the calendar associated with this date/time formatter.
 515      * @return the calendar associated with this date/time formatter.
 516      * @stable ICU 2.0
 517      */
 518     virtual const Calendar* getCalendar(void) const;
 519
 520     /**
 521      * Set the calendar to be used by this date format. Initially, the default
 522      * calendar for the specified or default locale is used.  The caller should
 523      * not delete the Calendar object after it is adopted by this call.
 524      * Adopting a new calendar will change to the default symbols.
 525      *
 526      * @param calendarToAdopt    Calendar object to be adopted.
 527      * @stable ICU 2.0
 528      */
 529     virtual void adoptCalendar(Calendar* calendarToAdopt);
 530
 531     /**
 532      * Set the calendar to be used by this date format. Initially, the default
 533      * calendar for the specified or default locale is used.
 534      *
 535      * @param newCalendar Calendar object to be set.
 536      * @stable ICU 2.0
 537      */
 538     virtual void setCalendar(const Calendar& newCalendar);
 539
 540
 541     /**
 542      * Gets the number formatter which this date/time formatter uses to format
 543      * and parse the numeric portions of the pattern.
 544      * @return the number formatter which this date/time formatter uses.
 545      * @stable ICU 2.0
 546      */
 547     virtual const NumberFormat* getNumberFormat(void) const;
 548
 549     /**
 550      * Allows you to set the number formatter.  The caller should
 551      * not delete the NumberFormat object after it is adopted by this call.
 552      * @param formatToAdopt     NumberFormat object to be adopted.
 553      * @stable ICU 2.0
 554      */
 555     virtual void adoptNumberFormat(NumberFormat* formatToAdopt);
 556
 557     /**
 558      * Allows you to set the number formatter.
 559      * @param newNumberFormat  NumberFormat object to be set.
 560      * @stable ICU 2.0
 561      */
 562     virtual void setNumberFormat(const NumberFormat& newNumberFormat);
 563
 564     /**
 565      * Returns a reference to the TimeZone used by this DateFormat's calendar.
 566      * @return the time zone associated with the calendar of DateFormat.
 567      * @stable ICU 2.0
 568      */
 569     virtual const TimeZone& getTimeZone(void) const;
 570
 571     /**
 572      * Sets the time zone for the calendar of this DateFormat object. The caller
 573      * no longer owns the TimeZone object and should not delete it after this call.
 574      * @param zoneToAdopt the TimeZone to be adopted.
 575      * @stable ICU 2.0
 576      */
 577     virtual void adoptTimeZone(TimeZone* zoneToAdopt);
 578
 579     /**
 580      * Sets the time zone for the calendar of this DateFormat object.
 581      * @param zone the new time zone.
 582      * @stable ICU 2.0
 583      */
 584     virtual void setTimeZone(const TimeZone& zone);
 585
 586 protected:
 587     /**
 588      * Default constructor.  Creates a DateFormat with no Calendar or NumberFormat
 589      * associated with it.  This constructor depends on the subclasses to fill in
 590      * the calendar and numberFormat fields.
 591      * @stable ICU 2.0
 592      */
 593     DateFormat();
 594
 595     /**
 596      * Copy constructor.
 597      * @stable ICU 2.0
 598      */
 599     DateFormat(const DateFormat&);
 600
 601     /**
 602      * Default assignment operator.
 603      * @stable ICU 2.0
 604      */
 605     DateFormat& operator=(const DateFormat&);
 606
 607     /**
 608      * The calendar that DateFormat uses to produce the time field values needed
 609      * to implement date/time formatting. Subclasses should generally initialize
 610      * this to the default calendar for the locale associated with this DateFormat.
 611      * @stable ICU 2.4
 612      */
 613     Calendar* fCalendar;
 614
 615     /**
 616      * The number formatter that DateFormat uses to format numbers in dates and
 617      * times. Subclasses should generally initialize this to the default number
 618      * format for the locale associated with this DateFormat.
 619      * @stable ICU 2.4
 620      */
 621     NumberFormat* fNumberFormat;
 622
 623 private:
 624     /**
 625      * Gets the date/time formatter with the given formatting styles for the
 626      * given locale.
 627      * @param dateStyle the given date formatting style.
 628      * @param timeStyle the given time formatting style.
 629      * @param inLocale the given locale.
 630      * @return a date/time formatter, or 0 on failure.
 631      */
 632     static DateFormat* U_EXPORT2 create(EStyle timeStyle, EStyle dateStyle, const Locale&);
 633
 634 public:
 635     /**
 636      * Field selector for FieldPosition for DateFormat fields.
 637      * @obsolete ICU 3.4 use UDateFormatField instead, since this API will be
 638      * removed in that release
 639      */
 640     enum EField
 641     {
 642         // Obsolete; use UDateFormatField instead
 643         kEraField = UDAT_ERA_FIELD,
 644         kYearField = UDAT_YEAR_FIELD,
 645         kMonthField = UDAT_MONTH_FIELD,
 646         kDateField = UDAT_DATE_FIELD,
 647         kHourOfDay1Field = UDAT_HOUR_OF_DAY1_FIELD,
 648         kHourOfDay0Field = UDAT_HOUR_OF_DAY0_FIELD,
 649         kMinuteField = UDAT_MINUTE_FIELD,
 650         kSecondField = UDAT_SECOND_FIELD,
 651         kMillisecondField = UDAT_FRACTIONAL_SECOND_FIELD,
 652         kDayOfWeekField = UDAT_DAY_OF_WEEK_FIELD,
 653         kDayOfYearField = UDAT_DAY_OF_YEAR_FIELD,
 654         kDayOfWeekInMonthField = UDAT_DAY_OF_WEEK_IN_MONTH_FIELD,
 655         kWeekOfYearField = UDAT_WEEK_OF_YEAR_FIELD,
 656         kWeekOfMonthField = UDAT_WEEK_OF_MONTH_FIELD,
 657         kAmPmField = UDAT_AM_PM_FIELD,
 658         kHour1Field = UDAT_HOUR1_FIELD,
 659         kHour0Field = UDAT_HOUR0_FIELD,
 660         kTimezoneField = UDAT_TIMEZONE_FIELD,
 661         kYearWOYField = UDAT_YEAR_WOY_FIELD,
 662         kDOWLocalField = UDAT_DOW_LOCAL_FIELD,
 663         kExtendedYearField = UDAT_EXTENDED_YEAR_FIELD,
 664         kJulianDayField = UDAT_JULIAN_DAY_FIELD,
 665         kMillisecondsInDayField = UDAT_MILLISECONDS_IN_DAY_FIELD,
 666
 667         // Obsolete; use UDateFormatField instead
 668         ERA_FIELD = UDAT_ERA_FIELD,
 669         YEAR_FIELD = UDAT_YEAR_FIELD,
 670         MONTH_FIELD = UDAT_MONTH_FIELD,
 671         DATE_FIELD = UDAT_DATE_FIELD,
 672         HOUR_OF_DAY1_FIELD = UDAT_HOUR_OF_DAY1_FIELD,
 673         HOUR_OF_DAY0_FIELD = UDAT_HOUR_OF_DAY0_FIELD,
 674         MINUTE_FIELD = UDAT_MINUTE_FIELD,
 675         SECOND_FIELD = UDAT_SECOND_FIELD,
 676         MILLISECOND_FIELD = UDAT_FRACTIONAL_SECOND_FIELD,
 677         DAY_OF_WEEK_FIELD = UDAT_DAY_OF_WEEK_FIELD,
 678         DAY_OF_YEAR_FIELD = UDAT_DAY_OF_YEAR_FIELD,
 679         DAY_OF_WEEK_IN_MONTH_FIELD = UDAT_DAY_OF_WEEK_IN_MONTH_FIELD,
 680         WEEK_OF_YEAR_FIELD = UDAT_WEEK_OF_YEAR_FIELD,
 681         WEEK_OF_MONTH_FIELD = UDAT_WEEK_OF_MONTH_FIELD,
 682         AM_PM_FIELD = UDAT_AM_PM_FIELD,
 683         HOUR1_FIELD = UDAT_HOUR1_FIELD,
 684         HOUR0_FIELD = UDAT_HOUR0_FIELD,
 685         TIMEZONE_FIELD = UDAT_TIMEZONE_FIELD
 686     };
 687 };
 688
 689 inline UnicodeString&
 690 DateFormat::format(const Formattable& obj,
 691                    UnicodeString& appendTo,
 692                    UErrorCode& status) const {
 693     return Format::format(obj, appendTo, status);
 694 }
 695 U_NAMESPACE_END
 696
 697 #endif /* #if !UCONFIG_NO_FORMATTING */
 698
 699 #endif // _DATEFMT
 700 //eof