J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1996-2005 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | /* |
| 27 | * (C) Copyright Taligent, Inc. 1996 - All Rights Reserved |
| 28 | * (C) Copyright IBM Corp. 1996-1998 - All Rights Reserved |
| 29 | * |
| 30 | * The original version of this source code and documentation is copyrighted |
| 31 | * and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These |
| 32 | * materials are provided under terms of a License Agreement between Taligent |
| 33 | * and Sun. This technology is protected by multiple US and International |
| 34 | * patents. This notice and attribution to Taligent may not be removed. |
| 35 | * Taligent is a registered trademark of Taligent, Inc. |
| 36 | * |
| 37 | */ |
| 38 | |
| 39 | package java.text; |
| 40 | |
| 41 | import java.io.IOException; |
| 42 | import java.io.InvalidObjectException; |
| 43 | import java.io.ObjectInputStream; |
| 44 | import java.util.Calendar; |
| 45 | import java.util.Date; |
| 46 | import java.util.GregorianCalendar; |
| 47 | import java.util.Hashtable; |
| 48 | import java.util.Locale; |
| 49 | import java.util.Map; |
| 50 | import java.util.MissingResourceException; |
| 51 | import java.util.ResourceBundle; |
| 52 | import java.util.SimpleTimeZone; |
| 53 | import java.util.TimeZone; |
| 54 | import sun.util.calendar.CalendarUtils; |
| 55 | import sun.util.calendar.ZoneInfoFile; |
| 56 | import sun.util.resources.LocaleData; |
| 57 | |
| 58 | /** |
| 59 | * <code>SimpleDateFormat</code> is a concrete class for formatting and |
| 60 | * parsing dates in a locale-sensitive manner. It allows for formatting |
| 61 | * (date -> text), parsing (text -> date), and normalization. |
| 62 | * |
| 63 | * <p> |
| 64 | * <code>SimpleDateFormat</code> allows you to start by choosing |
| 65 | * any user-defined patterns for date-time formatting. However, you |
| 66 | * are encouraged to create a date-time formatter with either |
| 67 | * <code>getTimeInstance</code>, <code>getDateInstance</code>, or |
| 68 | * <code>getDateTimeInstance</code> in <code>DateFormat</code>. Each |
| 69 | * of these class methods can return a date/time formatter initialized |
| 70 | * with a default format pattern. You may modify the format pattern |
| 71 | * using the <code>applyPattern</code> methods as desired. |
| 72 | * For more information on using these methods, see |
| 73 | * {@link DateFormat}. |
| 74 | * |
| 75 | * <h4>Date and Time Patterns</h4> |
| 76 | * <p> |
| 77 | * Date and time formats are specified by <em>date and time pattern</em> |
| 78 | * strings. |
| 79 | * Within date and time pattern strings, unquoted letters from |
| 80 | * <code>'A'</code> to <code>'Z'</code> and from <code>'a'</code> to |
| 81 | * <code>'z'</code> are interpreted as pattern letters representing the |
| 82 | * components of a date or time string. |
| 83 | * Text can be quoted using single quotes (<code>'</code>) to avoid |
| 84 | * interpretation. |
| 85 | * <code>"''"</code> represents a single quote. |
| 86 | * All other characters are not interpreted; they're simply copied into the |
| 87 | * output string during formatting or matched against the input string |
| 88 | * during parsing. |
| 89 | * <p> |
| 90 | * The following pattern letters are defined (all other characters from |
| 91 | * <code>'A'</code> to <code>'Z'</code> and from <code>'a'</code> to |
| 92 | * <code>'z'</code> are reserved): |
| 93 | * <blockquote> |
| 94 | * <table border=0 cellspacing=3 cellpadding=0 summary="Chart shows pattern letters, date/time component, presentation, and examples."> |
| 95 | * <tr bgcolor="#ccccff"> |
| 96 | * <th align=left>Letter |
| 97 | * <th align=left>Date or Time Component |
| 98 | * <th align=left>Presentation |
| 99 | * <th align=left>Examples |
| 100 | * <tr> |
| 101 | * <td><code>G</code> |
| 102 | * <td>Era designator |
| 103 | * <td><a href="#text">Text</a> |
| 104 | * <td><code>AD</code> |
| 105 | * <tr bgcolor="#eeeeff"> |
| 106 | * <td><code>y</code> |
| 107 | * <td>Year |
| 108 | * <td><a href="#year">Year</a> |
| 109 | * <td><code>1996</code>; <code>96</code> |
| 110 | * <tr> |
| 111 | * <td><code>M</code> |
| 112 | * <td>Month in year |
| 113 | * <td><a href="#month">Month</a> |
| 114 | * <td><code>July</code>; <code>Jul</code>; <code>07</code> |
| 115 | * <tr bgcolor="#eeeeff"> |
| 116 | * <td><code>w</code> |
| 117 | * <td>Week in year |
| 118 | * <td><a href="#number">Number</a> |
| 119 | * <td><code>27</code> |
| 120 | * <tr> |
| 121 | * <td><code>W</code> |
| 122 | * <td>Week in month |
| 123 | * <td><a href="#number">Number</a> |
| 124 | * <td><code>2</code> |
| 125 | * <tr bgcolor="#eeeeff"> |
| 126 | * <td><code>D</code> |
| 127 | * <td>Day in year |
| 128 | * <td><a href="#number">Number</a> |
| 129 | * <td><code>189</code> |
| 130 | * <tr> |
| 131 | * <td><code>d</code> |
| 132 | * <td>Day in month |
| 133 | * <td><a href="#number">Number</a> |
| 134 | * <td><code>10</code> |
| 135 | * <tr bgcolor="#eeeeff"> |
| 136 | * <td><code>F</code> |
| 137 | * <td>Day of week in month |
| 138 | * <td><a href="#number">Number</a> |
| 139 | * <td><code>2</code> |
| 140 | * <tr> |
| 141 | * <td><code>E</code> |
| 142 | * <td>Day in week |
| 143 | * <td><a href="#text">Text</a> |
| 144 | * <td><code>Tuesday</code>; <code>Tue</code> |
| 145 | * <tr bgcolor="#eeeeff"> |
| 146 | * <td><code>a</code> |
| 147 | * <td>Am/pm marker |
| 148 | * <td><a href="#text">Text</a> |
| 149 | * <td><code>PM</code> |
| 150 | * <tr> |
| 151 | * <td><code>H</code> |
| 152 | * <td>Hour in day (0-23) |
| 153 | * <td><a href="#number">Number</a> |
| 154 | * <td><code>0</code> |
| 155 | * <tr bgcolor="#eeeeff"> |
| 156 | * <td><code>k</code> |
| 157 | * <td>Hour in day (1-24) |
| 158 | * <td><a href="#number">Number</a> |
| 159 | * <td><code>24</code> |
| 160 | * <tr> |
| 161 | * <td><code>K</code> |
| 162 | * <td>Hour in am/pm (0-11) |
| 163 | * <td><a href="#number">Number</a> |
| 164 | * <td><code>0</code> |
| 165 | * <tr bgcolor="#eeeeff"> |
| 166 | * <td><code>h</code> |
| 167 | * <td>Hour in am/pm (1-12) |
| 168 | * <td><a href="#number">Number</a> |
| 169 | * <td><code>12</code> |
| 170 | * <tr> |
| 171 | * <td><code>m</code> |
| 172 | * <td>Minute in hour |
| 173 | * <td><a href="#number">Number</a> |
| 174 | * <td><code>30</code> |
| 175 | * <tr bgcolor="#eeeeff"> |
| 176 | * <td><code>s</code> |
| 177 | * <td>Second in minute |
| 178 | * <td><a href="#number">Number</a> |
| 179 | * <td><code>55</code> |
| 180 | * <tr> |
| 181 | * <td><code>S</code> |
| 182 | * <td>Millisecond |
| 183 | * <td><a href="#number">Number</a> |
| 184 | * <td><code>978</code> |
| 185 | * <tr bgcolor="#eeeeff"> |
| 186 | * <td><code>z</code> |
| 187 | * <td>Time zone |
| 188 | * <td><a href="#timezone">General time zone</a> |
| 189 | * <td><code>Pacific Standard Time</code>; <code>PST</code>; <code>GMT-08:00</code> |
| 190 | * <tr> |
| 191 | * <td><code>Z</code> |
| 192 | * <td>Time zone |
| 193 | * <td><a href="#rfc822timezone">RFC 822 time zone</a> |
| 194 | * <td><code>-0800</code> |
| 195 | * </table> |
| 196 | * </blockquote> |
| 197 | * Pattern letters are usually repeated, as their number determines the |
| 198 | * exact presentation: |
| 199 | * <ul> |
| 200 | * <li><strong><a name="text">Text:</a></strong> |
| 201 | * For formatting, if the number of pattern letters is 4 or more, |
| 202 | * the full form is used; otherwise a short or abbreviated form |
| 203 | * is used if available. |
| 204 | * For parsing, both forms are accepted, independent of the number |
| 205 | * of pattern letters. |
| 206 | * <li><strong><a name="number">Number:</a></strong> |
| 207 | * For formatting, the number of pattern letters is the minimum |
| 208 | * number of digits, and shorter numbers are zero-padded to this amount. |
| 209 | * For parsing, the number of pattern letters is ignored unless |
| 210 | * it's needed to separate two adjacent fields. |
| 211 | * <li><strong><a name="year">Year:</a></strong> |
| 212 | * If the formatter's {@link #getCalendar() Calendar} is the Gregorian |
| 213 | * calendar, the following rules are applied.<br> |
| 214 | * <ul> |
| 215 | * <li>For formatting, if the number of pattern letters is 2, the year |
| 216 | * is truncated to 2 digits; otherwise it is interpreted as a |
| 217 | * <a href="#number">number</a>. |
| 218 | * <li>For parsing, if the number of pattern letters is more than 2, |
| 219 | * the year is interpreted literally, regardless of the number of |
| 220 | * digits. So using the pattern "MM/dd/yyyy", "01/11/12" parses to |
| 221 | * Jan 11, 12 A.D. |
| 222 | * <li>For parsing with the abbreviated year pattern ("y" or "yy"), |
| 223 | * <code>SimpleDateFormat</code> must interpret the abbreviated year |
| 224 | * relative to some century. It does this by adjusting dates to be |
| 225 | * within 80 years before and 20 years after the time the <code>SimpleDateFormat</code> |
| 226 | * instance is created. For example, using a pattern of "MM/dd/yy" and a |
| 227 | * <code>SimpleDateFormat</code> instance created on Jan 1, 1997, the string |
| 228 | * "01/11/12" would be interpreted as Jan 11, 2012 while the string "05/04/64" |
| 229 | * would be interpreted as May 4, 1964. |
| 230 | * During parsing, only strings consisting of exactly two digits, as defined by |
| 231 | * {@link Character#isDigit(char)}, will be parsed into the default century. |
| 232 | * Any other numeric string, such as a one digit string, a three or more digit |
| 233 | * string, or a two digit string that isn't all digits (for example, "-1"), is |
| 234 | * interpreted literally. So "01/02/3" or "01/02/003" are parsed, using the |
| 235 | * same pattern, as Jan 2, 3 AD. Likewise, "01/02/-3" is parsed as Jan 2, 4 BC. |
| 236 | * </ul> |
| 237 | * Otherwise, calendar system specific forms are applied. |
| 238 | * For both formatting and parsing, if the number of pattern |
| 239 | * letters is 4 or more, a calendar specific {@linkplain |
| 240 | * Calendar#LONG long form} is used. Otherwise, a calendar |
| 241 | * specific {@linkplain Calendar#SHORT short or abbreviated form} |
| 242 | * is used. |
| 243 | * <li><strong><a name="month">Month:</a></strong> |
| 244 | * If the number of pattern letters is 3 or more, the month is |
| 245 | * interpreted as <a href="#text">text</a>; otherwise, |
| 246 | * it is interpreted as a <a href="#number">number</a>. |
| 247 | * <li><strong><a name="timezone">General time zone:</a></strong> |
| 248 | * Time zones are interpreted as <a href="#text">text</a> if they have |
| 249 | * names. For time zones representing a GMT offset value, the |
| 250 | * following syntax is used: |
| 251 | * <pre> |
| 252 | * <a name="GMTOffsetTimeZone"><i>GMTOffsetTimeZone:</i></a> |
| 253 | * <code>GMT</code> <i>Sign</i> <i>Hours</i> <code>:</code> <i>Minutes</i> |
| 254 | * <i>Sign:</i> one of |
| 255 | * <code>+ -</code> |
| 256 | * <i>Hours:</i> |
| 257 | * <i>Digit</i> |
| 258 | * <i>Digit</i> <i>Digit</i> |
| 259 | * <i>Minutes:</i> |
| 260 | * <i>Digit</i> <i>Digit</i> |
| 261 | * <i>Digit:</i> one of |
| 262 | * <code>0 1 2 3 4 5 6 7 8 9</code></pre> |
| 263 | * <i>Hours</i> must be between 0 and 23, and <i>Minutes</i> must be between |
| 264 | * 00 and 59. The format is locale independent and digits must be taken |
| 265 | * from the Basic Latin block of the Unicode standard. |
| 266 | * <p>For parsing, <a href="#rfc822timezone">RFC 822 time zones</a> are also |
| 267 | * accepted. |
| 268 | * <li><strong><a name="rfc822timezone">RFC 822 time zone:</a></strong> |
| 269 | * For formatting, the RFC 822 4-digit time zone format is used: |
| 270 | * <pre> |
| 271 | * <i>RFC822TimeZone:</i> |
| 272 | * <i>Sign</i> <i>TwoDigitHours</i> <i>Minutes</i> |
| 273 | * <i>TwoDigitHours:</i> |
| 274 | * <i>Digit Digit</i></pre> |
| 275 | * <i>TwoDigitHours</i> must be between 00 and 23. Other definitions |
| 276 | * are as for <a href="#timezone">general time zones</a>. |
| 277 | * <p>For parsing, <a href="#timezone">general time zones</a> are also |
| 278 | * accepted. |
| 279 | * </ul> |
| 280 | * <code>SimpleDateFormat</code> also supports <em>localized date and time |
| 281 | * pattern</em> strings. In these strings, the pattern letters described above |
| 282 | * may be replaced with other, locale dependent, pattern letters. |
| 283 | * <code>SimpleDateFormat</code> does not deal with the localization of text |
| 284 | * other than the pattern letters; that's up to the client of the class. |
| 285 | * <p> |
| 286 | * |
| 287 | * <h4>Examples</h4> |
| 288 | * |
| 289 | * The following examples show how date and time patterns are interpreted in |
| 290 | * the U.S. locale. The given date and time are 2001-07-04 12:08:56 local time |
| 291 | * in the U.S. Pacific Time time zone. |
| 292 | * <blockquote> |
| 293 | * <table border=0 cellspacing=3 cellpadding=0 summary="Examples of date and time patterns interpreted in the U.S. locale"> |
| 294 | * <tr bgcolor="#ccccff"> |
| 295 | * <th align=left>Date and Time Pattern |
| 296 | * <th align=left>Result |
| 297 | * <tr> |
| 298 | * <td><code>"yyyy.MM.dd G 'at' HH:mm:ss z"</code> |
| 299 | * <td><code>2001.07.04 AD at 12:08:56 PDT</code> |
| 300 | * <tr bgcolor="#eeeeff"> |
| 301 | * <td><code>"EEE, MMM d, ''yy"</code> |
| 302 | * <td><code>Wed, Jul 4, '01</code> |
| 303 | * <tr> |
| 304 | * <td><code>"h:mm a"</code> |
| 305 | * <td><code>12:08 PM</code> |
| 306 | * <tr bgcolor="#eeeeff"> |
| 307 | * <td><code>"hh 'o''clock' a, zzzz"</code> |
| 308 | * <td><code>12 o'clock PM, Pacific Daylight Time</code> |
| 309 | * <tr> |
| 310 | * <td><code>"K:mm a, z"</code> |
| 311 | * <td><code>0:08 PM, PDT</code> |
| 312 | * <tr bgcolor="#eeeeff"> |
| 313 | * <td><code>"yyyyy.MMMMM.dd GGG hh:mm aaa"</code> |
| 314 | * <td><code>02001.July.04 AD 12:08 PM</code> |
| 315 | * <tr> |
| 316 | * <td><code>"EEE, d MMM yyyy HH:mm:ss Z"</code> |
| 317 | * <td><code>Wed, 4 Jul 2001 12:08:56 -0700</code> |
| 318 | * <tr bgcolor="#eeeeff"> |
| 319 | * <td><code>"yyMMddHHmmssZ"</code> |
| 320 | * <td><code>010704120856-0700</code> |
| 321 | * <tr> |
| 322 | * <td><code>"yyyy-MM-dd'T'HH:mm:ss.SSSZ"</code> |
| 323 | * <td><code>2001-07-04T12:08:56.235-0700</code> |
| 324 | * </table> |
| 325 | * </blockquote> |
| 326 | * |
| 327 | * <h4><a name="synchronization">Synchronization</a></h4> |
| 328 | * |
| 329 | * <p> |
| 330 | * Date formats are not synchronized. |
| 331 | * It is recommended to create separate format instances for each thread. |
| 332 | * If multiple threads access a format concurrently, it must be synchronized |
| 333 | * externally. |
| 334 | * |
| 335 | * @see <a href="http://java.sun.com/docs/books/tutorial/i18n/format/simpleDateFormat.html">Java Tutorial</a> |
| 336 | * @see java.util.Calendar |
| 337 | * @see java.util.TimeZone |
| 338 | * @see DateFormat |
| 339 | * @see DateFormatSymbols |
| 340 | * @author Mark Davis, Chen-Lieh Huang, Alan Liu |
| 341 | */ |
| 342 | public class SimpleDateFormat extends DateFormat { |
| 343 | |
| 344 | // the official serial version ID which says cryptically |
| 345 | // which version we're compatible with |
| 346 | static final long serialVersionUID = 4774881970558875024L; |
| 347 | |
| 348 | // the internal serial version which says which version was written |
| 349 | // - 0 (default) for version up to JDK 1.1.3 |
| 350 | // - 1 for version from JDK 1.1.4, which includes a new field |
| 351 | static final int currentSerialVersion = 1; |
| 352 | |
| 353 | /** |
| 354 | * The version of the serialized data on the stream. Possible values: |
| 355 | * <ul> |
| 356 | * <li><b>0</b> or not present on stream: JDK 1.1.3. This version |
| 357 | * has no <code>defaultCenturyStart</code> on stream. |
| 358 | * <li><b>1</b> JDK 1.1.4 or later. This version adds |
| 359 | * <code>defaultCenturyStart</code>. |
| 360 | * </ul> |
| 361 | * When streaming out this class, the most recent format |
| 362 | * and the highest allowable <code>serialVersionOnStream</code> |
| 363 | * is written. |
| 364 | * @serial |
| 365 | * @since JDK1.1.4 |
| 366 | */ |
| 367 | private int serialVersionOnStream = currentSerialVersion; |
| 368 | |
| 369 | /** |
| 370 | * The pattern string of this formatter. This is always a non-localized |
| 371 | * pattern. May not be null. See class documentation for details. |
| 372 | * @serial |
| 373 | */ |
| 374 | private String pattern; |
| 375 | |
| 376 | /** |
| 377 | * The compiled pattern. |
| 378 | */ |
| 379 | transient private char[] compiledPattern; |
| 380 | |
| 381 | /** |
| 382 | * Tags for the compiled pattern. |
| 383 | */ |
| 384 | private final static int TAG_QUOTE_ASCII_CHAR = 100; |
| 385 | private final static int TAG_QUOTE_CHARS = 101; |
| 386 | |
| 387 | /** |
| 388 | * Locale dependent digit zero. |
| 389 | * @see #zeroPaddingNumber |
| 390 | * @see java.text.DecimalFormatSymbols#getZeroDigit |
| 391 | */ |
| 392 | transient private char zeroDigit; |
| 393 | |
| 394 | /** |
| 395 | * The symbols used by this formatter for week names, month names, |
| 396 | * etc. May not be null. |
| 397 | * @serial |
| 398 | * @see java.text.DateFormatSymbols |
| 399 | */ |
| 400 | private DateFormatSymbols formatData; |
| 401 | |
| 402 | /** |
| 403 | * We map dates with two-digit years into the century starting at |
| 404 | * <code>defaultCenturyStart</code>, which may be any date. May |
| 405 | * not be null. |
| 406 | * @serial |
| 407 | * @since JDK1.1.4 |
| 408 | */ |
| 409 | private Date defaultCenturyStart; |
| 410 | |
| 411 | transient private int defaultCenturyStartYear; |
| 412 | |
| 413 | private static final int MILLIS_PER_MINUTE = 60 * 1000; |
| 414 | |
| 415 | // For time zones that have no names, use strings GMT+minutes and |
| 416 | // GMT-minutes. For instance, in France the time zone is GMT+60. |
| 417 | private static final String GMT = "GMT"; |
| 418 | |
| 419 | /** |
| 420 | * Cache to hold the DateTimePatterns of a Locale. |
| 421 | */ |
| 422 | private static Hashtable<String,String[]> cachedLocaleData |
| 423 | = new Hashtable<String,String[]>(3); |
| 424 | |
| 425 | /** |
| 426 | * Cache NumberFormat instances with Locale key. |
| 427 | */ |
| 428 | private static Hashtable<Locale,NumberFormat> cachedNumberFormatData |
| 429 | = new Hashtable<Locale,NumberFormat>(3); |
| 430 | |
| 431 | /** |
| 432 | * The Locale used to instantiate this |
| 433 | * <code>SimpleDateFormat</code>. The value may be null if this object |
| 434 | * has been created by an older <code>SimpleDateFormat</code> and |
| 435 | * deserialized. |
| 436 | * |
| 437 | * @serial |
| 438 | * @since 1.6 |
| 439 | */ |
| 440 | private Locale locale; |
| 441 | |
| 442 | /** |
| 443 | * Indicates whether this <code>SimpleDateFormat</code> should use |
| 444 | * the DateFormatSymbols. If true, the format and parse methods |
| 445 | * use the DateFormatSymbols values. If false, the format and |
| 446 | * parse methods call Calendar.getDisplayName or |
| 447 | * Calendar.getDisplayNames. |
| 448 | */ |
| 449 | transient boolean useDateFormatSymbols; |
| 450 | |
| 451 | /** |
| 452 | * Constructs a <code>SimpleDateFormat</code> using the default pattern and |
| 453 | * date format symbols for the default locale. |
| 454 | * <b>Note:</b> This constructor may not support all locales. |
| 455 | * For full coverage, use the factory methods in the {@link DateFormat} |
| 456 | * class. |
| 457 | */ |
| 458 | public SimpleDateFormat() { |
| 459 | this(SHORT, SHORT, Locale.getDefault()); |
| 460 | } |
| 461 | |
| 462 | /** |
| 463 | * Constructs a <code>SimpleDateFormat</code> using the given pattern and |
| 464 | * the default date format symbols for the default locale. |
| 465 | * <b>Note:</b> This constructor may not support all locales. |
| 466 | * For full coverage, use the factory methods in the {@link DateFormat} |
| 467 | * class. |
| 468 | * |
| 469 | * @param pattern the pattern describing the date and time format |
| 470 | * @exception NullPointerException if the given pattern is null |
| 471 | * @exception IllegalArgumentException if the given pattern is invalid |
| 472 | */ |
| 473 | public SimpleDateFormat(String pattern) |
| 474 | { |
| 475 | this(pattern, Locale.getDefault()); |
| 476 | } |
| 477 | |
| 478 | /** |
| 479 | * Constructs a <code>SimpleDateFormat</code> using the given pattern and |
| 480 | * the default date format symbols for the given locale. |
| 481 | * <b>Note:</b> This constructor may not support all locales. |
| 482 | * For full coverage, use the factory methods in the {@link DateFormat} |
| 483 | * class. |
| 484 | * |
| 485 | * @param pattern the pattern describing the date and time format |
| 486 | * @param locale the locale whose date format symbols should be used |
| 487 | * @exception NullPointerException if the given pattern or locale is null |
| 488 | * @exception IllegalArgumentException if the given pattern is invalid |
| 489 | */ |
| 490 | public SimpleDateFormat(String pattern, Locale locale) |
| 491 | { |
| 492 | if (pattern == null || locale == null) { |
| 493 | throw new NullPointerException(); |
| 494 | } |
| 495 | |
| 496 | initializeCalendar(locale); |
| 497 | this.pattern = pattern; |
| 498 | this.formatData = DateFormatSymbols.getInstance(locale); |
| 499 | this.locale = locale; |
| 500 | initialize(locale); |
| 501 | } |
| 502 | |
| 503 | /** |
| 504 | * Constructs a <code>SimpleDateFormat</code> using the given pattern and |
| 505 | * date format symbols. |
| 506 | * |
| 507 | * @param pattern the pattern describing the date and time format |
| 508 | * @param formatSymbols the date format symbols to be used for formatting |
| 509 | * @exception NullPointerException if the given pattern or formatSymbols is null |
| 510 | * @exception IllegalArgumentException if the given pattern is invalid |
| 511 | */ |
| 512 | public SimpleDateFormat(String pattern, DateFormatSymbols formatSymbols) |
| 513 | { |
| 514 | if (pattern == null || formatSymbols == null) { |
| 515 | throw new NullPointerException(); |
| 516 | } |
| 517 | |
| 518 | this.pattern = pattern; |
| 519 | this.formatData = (DateFormatSymbols) formatSymbols.clone(); |
| 520 | this.locale = Locale.getDefault(); |
| 521 | initializeCalendar(this.locale); |
| 522 | initialize(this.locale); |
| 523 | useDateFormatSymbols = true; |
| 524 | } |
| 525 | |
| 526 | /* Package-private, called by DateFormat factory methods */ |
| 527 | SimpleDateFormat(int timeStyle, int dateStyle, Locale loc) { |
| 528 | if (loc == null) { |
| 529 | throw new NullPointerException(); |
| 530 | } |
| 531 | |
| 532 | this.locale = loc; |
| 533 | // initialize calendar and related fields |
| 534 | initializeCalendar(loc); |
| 535 | |
| 536 | /* try the cache first */ |
| 537 | String key = getKey(); |
| 538 | String[] dateTimePatterns = cachedLocaleData.get(key); |
| 539 | if (dateTimePatterns == null) { /* cache miss */ |
| 540 | ResourceBundle r = LocaleData.getDateFormatData(loc); |
| 541 | if (!isGregorianCalendar()) { |
| 542 | try { |
| 543 | dateTimePatterns = r.getStringArray(getCalendarName() + ".DateTimePatterns"); |
| 544 | } catch (MissingResourceException e) { |
| 545 | } |
| 546 | } |
| 547 | if (dateTimePatterns == null) { |
| 548 | dateTimePatterns = r.getStringArray("DateTimePatterns"); |
| 549 | } |
| 550 | /* update cache */ |
| 551 | cachedLocaleData.put(key, dateTimePatterns); |
| 552 | } |
| 553 | formatData = DateFormatSymbols.getInstance(loc); |
| 554 | if ((timeStyle >= 0) && (dateStyle >= 0)) { |
| 555 | Object[] dateTimeArgs = {dateTimePatterns[timeStyle], |
| 556 | dateTimePatterns[dateStyle + 4]}; |
| 557 | pattern = MessageFormat.format(dateTimePatterns[8], dateTimeArgs); |
| 558 | } |
| 559 | else if (timeStyle >= 0) { |
| 560 | pattern = dateTimePatterns[timeStyle]; |
| 561 | } |
| 562 | else if (dateStyle >= 0) { |
| 563 | pattern = dateTimePatterns[dateStyle + 4]; |
| 564 | } |
| 565 | else { |
| 566 | throw new IllegalArgumentException("No date or time style specified"); |
| 567 | } |
| 568 | |
| 569 | initialize(loc); |
| 570 | } |
| 571 | |
| 572 | /* Initialize compiledPattern and numberFormat fields */ |
| 573 | private void initialize(Locale loc) { |
| 574 | // Verify and compile the given pattern. |
| 575 | compiledPattern = compile(pattern); |
| 576 | |
| 577 | /* try the cache first */ |
| 578 | numberFormat = cachedNumberFormatData.get(loc); |
| 579 | if (numberFormat == null) { /* cache miss */ |
| 580 | numberFormat = NumberFormat.getIntegerInstance(loc); |
| 581 | numberFormat.setGroupingUsed(false); |
| 582 | |
| 583 | /* update cache */ |
| 584 | cachedNumberFormatData.put(loc, numberFormat); |
| 585 | } |
| 586 | numberFormat = (NumberFormat) numberFormat.clone(); |
| 587 | |
| 588 | initializeDefaultCentury(); |
| 589 | } |
| 590 | |
| 591 | private void initializeCalendar(Locale loc) { |
| 592 | if (calendar == null) { |
| 593 | assert loc != null; |
| 594 | // The format object must be constructed using the symbols for this zone. |
| 595 | // However, the calendar should use the current default TimeZone. |
| 596 | // If this is not contained in the locale zone strings, then the zone |
| 597 | // will be formatted using generic GMT+/-H:MM nomenclature. |
| 598 | calendar = Calendar.getInstance(TimeZone.getDefault(), loc); |
| 599 | } |
| 600 | } |
| 601 | |
| 602 | private String getKey() { |
| 603 | StringBuilder sb = new StringBuilder(); |
| 604 | sb.append(getCalendarName()).append('.'); |
| 605 | sb.append(locale.getLanguage()).append('_').append(locale.getCountry()).append('_').append(locale.getVariant()); |
| 606 | return sb.toString(); |
| 607 | } |
| 608 | |
| 609 | /** |
| 610 | * Returns the compiled form of the given pattern. The syntax of |
| 611 | * the compiled pattern is: |
| 612 | * <blockquote> |
| 613 | * CompiledPattern: |
| 614 | * EntryList |
| 615 | * EntryList: |
| 616 | * Entry |
| 617 | * EntryList Entry |
| 618 | * Entry: |
| 619 | * TagField |
| 620 | * TagField data |
| 621 | * TagField: |
| 622 | * Tag Length |
| 623 | * TaggedData |
| 624 | * Tag: |
| 625 | * pattern_char_index |
| 626 | * TAG_QUOTE_CHARS |
| 627 | * Length: |
| 628 | * short_length |
| 629 | * long_length |
| 630 | * TaggedData: |
| 631 | * TAG_QUOTE_ASCII_CHAR ascii_char |
| 632 | * |
| 633 | * </blockquote> |
| 634 | * |
| 635 | * where `short_length' is an 8-bit unsigned integer between 0 and |
| 636 | * 254. `long_length' is a sequence of an 8-bit integer 255 and a |
| 637 | * 32-bit signed integer value which is split into upper and lower |
| 638 | * 16-bit fields in two char's. `pattern_char_index' is an 8-bit |
| 639 | * integer between 0 and 18. `ascii_char' is an 7-bit ASCII |
| 640 | * character value. `data' depends on its Tag value. |
| 641 | * <p> |
| 642 | * If Length is short_length, Tag and short_length are packed in a |
| 643 | * single char, as illustrated below. |
| 644 | * <blockquote> |
| 645 | * char[0] = (Tag << 8) | short_length; |
| 646 | * </blockquote> |
| 647 | * |
| 648 | * If Length is long_length, Tag and 255 are packed in the first |
| 649 | * char and a 32-bit integer, as illustrated below. |
| 650 | * <blockquote> |
| 651 | * char[0] = (Tag << 8) | 255; |
| 652 | * char[1] = (char) (long_length >>> 16); |
| 653 | * char[2] = (char) (long_length & 0xffff); |
| 654 | * </blockquote> |
| 655 | * <p> |
| 656 | * If Tag is a pattern_char_index, its Length is the number of |
| 657 | * pattern characters. For example, if the given pattern is |
| 658 | * "yyyy", Tag is 1 and Length is 4, followed by no data. |
| 659 | * <p> |
| 660 | * If Tag is TAG_QUOTE_CHARS, its Length is the number of char's |
| 661 | * following the TagField. For example, if the given pattern is |
| 662 | * "'o''clock'", Length is 7 followed by a char sequence of |
| 663 | * <code>o&nbs;'&nbs;c&nbs;l&nbs;o&nbs;c&nbs;k</code>. |
| 664 | * <p> |
| 665 | * TAG_QUOTE_ASCII_CHAR is a special tag and has an ASCII |
| 666 | * character in place of Length. For example, if the given pattern |
| 667 | * is "'o'", the TaggedData entry is |
| 668 | * <code>((TAG_QUOTE_ASCII_CHAR&nbs;<<&nbs;8)&nbs;|&nbs;'o')</code>. |
| 669 | * |
| 670 | * @exception NullPointerException if the given pattern is null |
| 671 | * @exception IllegalArgumentException if the given pattern is invalid |
| 672 | */ |
| 673 | private char[] compile(String pattern) { |
| 674 | int length = pattern.length(); |
| 675 | boolean inQuote = false; |
| 676 | StringBuilder compiledPattern = new StringBuilder(length * 2); |
| 677 | StringBuilder tmpBuffer = null; |
| 678 | int count = 0; |
| 679 | int lastTag = -1; |
| 680 | |
| 681 | for (int i = 0; i < length; i++) { |
| 682 | char c = pattern.charAt(i); |
| 683 | |
| 684 | if (c == '\'') { |
| 685 | // '' is treated as a single quote regardless of being |
| 686 | // in a quoted section. |
| 687 | if ((i + 1) < length) { |
| 688 | c = pattern.charAt(i + 1); |
| 689 | if (c == '\'') { |
| 690 | i++; |
| 691 | if (count != 0) { |
| 692 | encode(lastTag, count, compiledPattern); |
| 693 | lastTag = -1; |
| 694 | count = 0; |
| 695 | } |
| 696 | if (inQuote) { |
| 697 | tmpBuffer.append(c); |
| 698 | } else { |
| 699 | compiledPattern.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | c)); |
| 700 | } |
| 701 | continue; |
| 702 | } |
| 703 | } |
| 704 | if (!inQuote) { |
| 705 | if (count != 0) { |
| 706 | encode(lastTag, count, compiledPattern); |
| 707 | lastTag = -1; |
| 708 | count = 0; |
| 709 | } |
| 710 | if (tmpBuffer == null) { |
| 711 | tmpBuffer = new StringBuilder(length); |
| 712 | } else { |
| 713 | tmpBuffer.setLength(0); |
| 714 | } |
| 715 | inQuote = true; |
| 716 | } else { |
| 717 | int len = tmpBuffer.length(); |
| 718 | if (len == 1) { |
| 719 | char ch = tmpBuffer.charAt(0); |
| 720 | if (ch < 128) { |
| 721 | compiledPattern.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | ch)); |
| 722 | } else { |
| 723 | compiledPattern.append((char)(TAG_QUOTE_CHARS << 8 | 1)); |
| 724 | compiledPattern.append(ch); |
| 725 | } |
| 726 | } else { |
| 727 | encode(TAG_QUOTE_CHARS, len, compiledPattern); |
| 728 | compiledPattern.append(tmpBuffer); |
| 729 | } |
| 730 | inQuote = false; |
| 731 | } |
| 732 | continue; |
| 733 | } |
| 734 | if (inQuote) { |
| 735 | tmpBuffer.append(c); |
| 736 | continue; |
| 737 | } |
| 738 | if (!(c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z')) { |
| 739 | if (count != 0) { |
| 740 | encode(lastTag, count, compiledPattern); |
| 741 | lastTag = -1; |
| 742 | count = 0; |
| 743 | } |
| 744 | if (c < 128) { |
| 745 | // In most cases, c would be a delimiter, such as ':'. |
| 746 | compiledPattern.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | c)); |
| 747 | } else { |
| 748 | // Take any contiguous non-ASCII alphabet characters and |
| 749 | // put them in a single TAG_QUOTE_CHARS. |
| 750 | int j; |
| 751 | for (j = i + 1; j < length; j++) { |
| 752 | char d = pattern.charAt(j); |
| 753 | if (d == '\'' || (d >= 'a' && d <= 'z' || d >= 'A' && d <= 'Z')) { |
| 754 | break; |
| 755 | } |
| 756 | } |
| 757 | compiledPattern.append((char)(TAG_QUOTE_CHARS << 8 | (j - i))); |
| 758 | for (; i < j; i++) { |
| 759 | compiledPattern.append(pattern.charAt(i)); |
| 760 | } |
| 761 | i--; |
| 762 | } |
| 763 | continue; |
| 764 | } |
| 765 | |
| 766 | int tag; |
| 767 | if ((tag = DateFormatSymbols.patternChars.indexOf(c)) == -1) { |
| 768 | throw new IllegalArgumentException("Illegal pattern character " + |
| 769 | "'" + c + "'"); |
| 770 | } |
| 771 | if (lastTag == -1 || lastTag == tag) { |
| 772 | lastTag = tag; |
| 773 | count++; |
| 774 | continue; |
| 775 | } |
| 776 | encode(lastTag, count, compiledPattern); |
| 777 | lastTag = tag; |
| 778 | count = 1; |
| 779 | } |
| 780 | |
| 781 | if (inQuote) { |
| 782 | throw new IllegalArgumentException("Unterminated quote"); |
| 783 | } |
| 784 | |
| 785 | if (count != 0) { |
| 786 | encode(lastTag, count, compiledPattern); |
| 787 | } |
| 788 | |
| 789 | // Copy the compiled pattern to a char array |
| 790 | int len = compiledPattern.length(); |
| 791 | char[] r = new char[len]; |
| 792 | compiledPattern.getChars(0, len, r, 0); |
| 793 | return r; |
| 794 | } |
| 795 | |
| 796 | /** |
| 797 | * Encodes the given tag and length and puts encoded char(s) into buffer. |
| 798 | */ |
| 799 | private static final void encode(int tag, int length, StringBuilder buffer) { |
| 800 | if (length < 255) { |
| 801 | buffer.append((char)(tag << 8 | length)); |
| 802 | } else { |
| 803 | buffer.append((char)((tag << 8) | 0xff)); |
| 804 | buffer.append((char)(length >>> 16)); |
| 805 | buffer.append((char)(length & 0xffff)); |
| 806 | } |
| 807 | } |
| 808 | |
| 809 | /* Initialize the fields we use to disambiguate ambiguous years. Separate |
| 810 | * so we can call it from readObject(). |
| 811 | */ |
| 812 | private void initializeDefaultCentury() { |
| 813 | calendar.setTime( new Date() ); |
| 814 | calendar.add( Calendar.YEAR, -80 ); |
| 815 | parseAmbiguousDatesAsAfter(calendar.getTime()); |
| 816 | } |
| 817 | |
| 818 | /* Define one-century window into which to disambiguate dates using |
| 819 | * two-digit years. |
| 820 | */ |
| 821 | private void parseAmbiguousDatesAsAfter(Date startDate) { |
| 822 | defaultCenturyStart = startDate; |
| 823 | calendar.setTime(startDate); |
| 824 | defaultCenturyStartYear = calendar.get(Calendar.YEAR); |
| 825 | } |
| 826 | |
| 827 | /** |
| 828 | * Sets the 100-year period 2-digit years will be interpreted as being in |
| 829 | * to begin on the date the user specifies. |
| 830 | * |
| 831 | * @param startDate During parsing, two digit years will be placed in the range |
| 832 | * <code>startDate</code> to <code>startDate + 100 years</code>. |
| 833 | * @see #get2DigitYearStart |
| 834 | * @since 1.2 |
| 835 | */ |
| 836 | public void set2DigitYearStart(Date startDate) { |
| 837 | parseAmbiguousDatesAsAfter(startDate); |
| 838 | } |
| 839 | |
| 840 | /** |
| 841 | * Returns the beginning date of the 100-year period 2-digit years are interpreted |
| 842 | * as being within. |
| 843 | * |
| 844 | * @return the start of the 100-year period into which two digit years are |
| 845 | * parsed |
| 846 | * @see #set2DigitYearStart |
| 847 | * @since 1.2 |
| 848 | */ |
| 849 | public Date get2DigitYearStart() { |
| 850 | return defaultCenturyStart; |
| 851 | } |
| 852 | |
| 853 | /** |
| 854 | * Formats the given <code>Date</code> into a date/time string and appends |
| 855 | * the result to the given <code>StringBuffer</code>. |
| 856 | * |
| 857 | * @param date the date-time value to be formatted into a date-time string. |
| 858 | * @param toAppendTo where the new date-time text is to be appended. |
| 859 | * @param pos the formatting position. On input: an alignment field, |
| 860 | * if desired. On output: the offsets of the alignment field. |
| 861 | * @return the formatted date-time string. |
| 862 | * @exception NullPointerException if the given date is null |
| 863 | */ |
| 864 | public StringBuffer format(Date date, StringBuffer toAppendTo, |
| 865 | FieldPosition pos) |
| 866 | { |
| 867 | pos.beginIndex = pos.endIndex = 0; |
| 868 | return format(date, toAppendTo, pos.getFieldDelegate()); |
| 869 | } |
| 870 | |
| 871 | // Called from Format after creating a FieldDelegate |
| 872 | private StringBuffer format(Date date, StringBuffer toAppendTo, |
| 873 | FieldDelegate delegate) { |
| 874 | // Convert input date to time field list |
| 875 | calendar.setTime(date); |
| 876 | |
| 877 | boolean useDateFormatSymbols = useDateFormatSymbols(); |
| 878 | |
| 879 | for (int i = 0; i < compiledPattern.length; ) { |
| 880 | int tag = compiledPattern[i] >>> 8; |
| 881 | int count = compiledPattern[i++] & 0xff; |
| 882 | if (count == 255) { |
| 883 | count = compiledPattern[i++] << 16; |
| 884 | count |= compiledPattern[i++]; |
| 885 | } |
| 886 | |
| 887 | switch (tag) { |
| 888 | case TAG_QUOTE_ASCII_CHAR: |
| 889 | toAppendTo.append((char)count); |
| 890 | break; |
| 891 | |
| 892 | case TAG_QUOTE_CHARS: |
| 893 | toAppendTo.append(compiledPattern, i, count); |
| 894 | i += count; |
| 895 | break; |
| 896 | |
| 897 | default: |
| 898 | subFormat(tag, count, delegate, toAppendTo, useDateFormatSymbols); |
| 899 | break; |
| 900 | } |
| 901 | } |
| 902 | return toAppendTo; |
| 903 | } |
| 904 | |
| 905 | /** |
| 906 | * Formats an Object producing an <code>AttributedCharacterIterator</code>. |
| 907 | * You can use the returned <code>AttributedCharacterIterator</code> |
| 908 | * to build the resulting String, as well as to determine information |
| 909 | * about the resulting String. |
| 910 | * <p> |
| 911 | * Each attribute key of the AttributedCharacterIterator will be of type |
| 912 | * <code>DateFormat.Field</code>, with the corresponding attribute value |
| 913 | * being the same as the attribute key. |
| 914 | * |
| 915 | * @exception NullPointerException if obj is null. |
| 916 | * @exception IllegalArgumentException if the Format cannot format the |
| 917 | * given object, or if the Format's pattern string is invalid. |
| 918 | * @param obj The object to format |
| 919 | * @return AttributedCharacterIterator describing the formatted value. |
| 920 | * @since 1.4 |
| 921 | */ |
| 922 | public AttributedCharacterIterator formatToCharacterIterator(Object obj) { |
| 923 | StringBuffer sb = new StringBuffer(); |
| 924 | CharacterIteratorFieldDelegate delegate = new |
| 925 | CharacterIteratorFieldDelegate(); |
| 926 | |
| 927 | if (obj instanceof Date) { |
| 928 | format((Date)obj, sb, delegate); |
| 929 | } |
| 930 | else if (obj instanceof Number) { |
| 931 | format(new Date(((Number)obj).longValue()), sb, delegate); |
| 932 | } |
| 933 | else if (obj == null) { |
| 934 | throw new NullPointerException( |
| 935 | "formatToCharacterIterator must be passed non-null object"); |
| 936 | } |
| 937 | else { |
| 938 | throw new IllegalArgumentException( |
| 939 | "Cannot format given Object as a Date"); |
| 940 | } |
| 941 | return delegate.getIterator(sb.toString()); |
| 942 | } |
| 943 | |
| 944 | // Map index into pattern character string to Calendar field number |
| 945 | private static final int[] PATTERN_INDEX_TO_CALENDAR_FIELD = |
| 946 | { |
| 947 | Calendar.ERA, Calendar.YEAR, Calendar.MONTH, Calendar.DATE, |
| 948 | Calendar.HOUR_OF_DAY, Calendar.HOUR_OF_DAY, Calendar.MINUTE, |
| 949 | Calendar.SECOND, Calendar.MILLISECOND, Calendar.DAY_OF_WEEK, |
| 950 | Calendar.DAY_OF_YEAR, Calendar.DAY_OF_WEEK_IN_MONTH, |
| 951 | Calendar.WEEK_OF_YEAR, Calendar.WEEK_OF_MONTH, |
| 952 | Calendar.AM_PM, Calendar.HOUR, Calendar.HOUR, Calendar.ZONE_OFFSET, |
| 953 | Calendar.ZONE_OFFSET |
| 954 | }; |
| 955 | |
| 956 | // Map index into pattern character string to DateFormat field number |
| 957 | private static final int[] PATTERN_INDEX_TO_DATE_FORMAT_FIELD = { |
| 958 | DateFormat.ERA_FIELD, DateFormat.YEAR_FIELD, DateFormat.MONTH_FIELD, |
| 959 | DateFormat.DATE_FIELD, DateFormat.HOUR_OF_DAY1_FIELD, |
| 960 | DateFormat.HOUR_OF_DAY0_FIELD, DateFormat.MINUTE_FIELD, |
| 961 | DateFormat.SECOND_FIELD, DateFormat.MILLISECOND_FIELD, |
| 962 | DateFormat.DAY_OF_WEEK_FIELD, DateFormat.DAY_OF_YEAR_FIELD, |
| 963 | DateFormat.DAY_OF_WEEK_IN_MONTH_FIELD, DateFormat.WEEK_OF_YEAR_FIELD, |
| 964 | DateFormat.WEEK_OF_MONTH_FIELD, DateFormat.AM_PM_FIELD, |
| 965 | DateFormat.HOUR1_FIELD, DateFormat.HOUR0_FIELD, |
| 966 | DateFormat.TIMEZONE_FIELD, DateFormat.TIMEZONE_FIELD, |
| 967 | }; |
| 968 | |
| 969 | // Maps from DecimalFormatSymbols index to Field constant |
| 970 | private static final Field[] PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID = { |
| 971 | Field.ERA, Field.YEAR, Field.MONTH, Field.DAY_OF_MONTH, |
| 972 | Field.HOUR_OF_DAY1, Field.HOUR_OF_DAY0, Field.MINUTE, |
| 973 | Field.SECOND, Field.MILLISECOND, Field.DAY_OF_WEEK, |
| 974 | Field.DAY_OF_YEAR, Field.DAY_OF_WEEK_IN_MONTH, |
| 975 | Field.WEEK_OF_YEAR, Field.WEEK_OF_MONTH, |
| 976 | Field.AM_PM, Field.HOUR1, Field.HOUR0, Field.TIME_ZONE, |
| 977 | Field.TIME_ZONE, |
| 978 | }; |
| 979 | |
| 980 | /** |
| 981 | * Private member function that does the real date/time formatting. |
| 982 | */ |
| 983 | private void subFormat(int patternCharIndex, int count, |
| 984 | FieldDelegate delegate, StringBuffer buffer, |
| 985 | boolean useDateFormatSymbols) |
| 986 | { |
| 987 | int maxIntCount = Integer.MAX_VALUE; |
| 988 | String current = null; |
| 989 | int beginOffset = buffer.length(); |
| 990 | |
| 991 | int field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex]; |
| 992 | int value = calendar.get(field); |
| 993 | int style = (count >= 4) ? Calendar.LONG : Calendar.SHORT; |
| 994 | if (!useDateFormatSymbols) { |
| 995 | current = calendar.getDisplayName(field, style, locale); |
| 996 | } |
| 997 | |
| 998 | // Note: zeroPaddingNumber() assumes that maxDigits is either |
| 999 | // 2 or maxIntCount. If we make any changes to this, |
| 1000 | // zeroPaddingNumber() must be fixed. |
| 1001 | |
| 1002 | switch (patternCharIndex) { |
| 1003 | case 0: // 'G' - ERA |
| 1004 | if (useDateFormatSymbols) { |
| 1005 | String[] eras = formatData.getEras(); |
| 1006 | if (value < eras.length) |
| 1007 | current = eras[value]; |
| 1008 | } |
| 1009 | if (current == null) |
| 1010 | current = ""; |
| 1011 | break; |
| 1012 | |
| 1013 | case 1: // 'y' - YEAR |
| 1014 | if (calendar instanceof GregorianCalendar) { |
| 1015 | if (count >= 4) |
| 1016 | zeroPaddingNumber(value, count, maxIntCount, buffer); |
| 1017 | else // count < 4 |
| 1018 | zeroPaddingNumber(value, 2, 2, buffer); // clip 1996 to 96 |
| 1019 | } else { |
| 1020 | if (current == null) { |
| 1021 | zeroPaddingNumber(value, style == Calendar.LONG ? 1 : count, |
| 1022 | maxIntCount, buffer); |
| 1023 | } |
| 1024 | } |
| 1025 | break; |
| 1026 | |
| 1027 | case 2: // 'M' - MONTH |
| 1028 | if (useDateFormatSymbols) { |
| 1029 | String[] months; |
| 1030 | if (count >= 4) { |
| 1031 | months = formatData.getMonths(); |
| 1032 | current = months[value]; |
| 1033 | } else if (count == 3) { |
| 1034 | months = formatData.getShortMonths(); |
| 1035 | current = months[value]; |
| 1036 | } |
| 1037 | } else { |
| 1038 | if (count < 3) { |
| 1039 | current = null; |
| 1040 | } |
| 1041 | } |
| 1042 | if (current == null) { |
| 1043 | zeroPaddingNumber(value+1, count, maxIntCount, buffer); |
| 1044 | } |
| 1045 | break; |
| 1046 | |
| 1047 | case 4: // 'k' - HOUR_OF_DAY: 1-based. eg, 23:59 + 1 hour =>> 24:59 |
| 1048 | if (current == null) { |
| 1049 | if (value == 0) |
| 1050 | zeroPaddingNumber(calendar.getMaximum(Calendar.HOUR_OF_DAY)+1, |
| 1051 | count, maxIntCount, buffer); |
| 1052 | else |
| 1053 | zeroPaddingNumber(value, count, maxIntCount, buffer); |
| 1054 | } |
| 1055 | break; |
| 1056 | |
| 1057 | case 9: // 'E' - DAY_OF_WEEK |
| 1058 | if (useDateFormatSymbols) { |
| 1059 | String[] weekdays; |
| 1060 | if (count >= 4) { |
| 1061 | weekdays = formatData.getWeekdays(); |
| 1062 | current = weekdays[value]; |
| 1063 | } else { // count < 4, use abbreviated form if exists |
| 1064 | weekdays = formatData.getShortWeekdays(); |
| 1065 | current = weekdays[value]; |
| 1066 | } |
| 1067 | } |
| 1068 | break; |
| 1069 | |
| 1070 | case 14: // 'a' - AM_PM |
| 1071 | if (useDateFormatSymbols) { |
| 1072 | String[] ampm = formatData.getAmPmStrings(); |
| 1073 | current = ampm[value]; |
| 1074 | } |
| 1075 | break; |
| 1076 | |
| 1077 | case 15: // 'h' - HOUR:1-based. eg, 11PM + 1 hour =>> 12 AM |
| 1078 | if (current == null) { |
| 1079 | if (value == 0) |
| 1080 | zeroPaddingNumber(calendar.getLeastMaximum(Calendar.HOUR)+1, |
| 1081 | count, maxIntCount, buffer); |
| 1082 | else |
| 1083 | zeroPaddingNumber(value, count, maxIntCount, buffer); |
| 1084 | } |
| 1085 | break; |
| 1086 | |
| 1087 | case 17: // 'z' - ZONE_OFFSET |
| 1088 | if (current == null) { |
| 1089 | if (formatData.locale == null || formatData.isZoneStringsSet) { |
| 1090 | int zoneIndex = |
| 1091 | formatData.getZoneIndex(calendar.getTimeZone().getID()); |
| 1092 | if (zoneIndex == -1) { |
| 1093 | value = calendar.get(Calendar.ZONE_OFFSET) + |
| 1094 | calendar.get(Calendar.DST_OFFSET); |
| 1095 | buffer.append(ZoneInfoFile.toCustomID(value)); |
| 1096 | } else { |
| 1097 | int index = (calendar.get(Calendar.DST_OFFSET) == 0) ? 1: 3; |
| 1098 | if (count < 4) { |
| 1099 | // Use the short name |
| 1100 | index++; |
| 1101 | } |
| 1102 | String[][] zoneStrings = formatData.getZoneStringsWrapper(); |
| 1103 | buffer.append(zoneStrings[zoneIndex][index]); |
| 1104 | } |
| 1105 | } else { |
| 1106 | TimeZone tz = calendar.getTimeZone(); |
| 1107 | boolean daylight = (calendar.get(Calendar.DST_OFFSET) != 0); |
| 1108 | int tzstyle = (count < 4 ? TimeZone.SHORT : TimeZone.LONG); |
| 1109 | buffer.append(tz.getDisplayName(daylight, tzstyle, formatData.locale)); |
| 1110 | } |
| 1111 | } |
| 1112 | break; |
| 1113 | |
| 1114 | case 18: // 'Z' - ZONE_OFFSET ("-/+hhmm" form) |
| 1115 | value = (calendar.get(Calendar.ZONE_OFFSET) + |
| 1116 | calendar.get(Calendar.DST_OFFSET)) / 60000; |
| 1117 | |
| 1118 | int width = 4; |
| 1119 | if (value >= 0) { |
| 1120 | buffer.append('+'); |
| 1121 | } else { |
| 1122 | width++; |
| 1123 | } |
| 1124 | |
| 1125 | int num = (value / 60) * 100 + (value % 60); |
| 1126 | CalendarUtils.sprintf0d(buffer, num, width); |
| 1127 | break; |
| 1128 | |
| 1129 | default: |
| 1130 | // case 3: // 'd' - DATE |
| 1131 | // case 5: // 'H' - HOUR_OF_DAY:0-based. eg, 23:59 + 1 hour =>> 00:59 |
| 1132 | // case 6: // 'm' - MINUTE |
| 1133 | // case 7: // 's' - SECOND |
| 1134 | // case 8: // 'S' - MILLISECOND |
| 1135 | // case 10: // 'D' - DAY_OF_YEAR |
| 1136 | // case 11: // 'F' - DAY_OF_WEEK_IN_MONTH |
| 1137 | // case 12: // 'w' - WEEK_OF_YEAR |
| 1138 | // case 13: // 'W' - WEEK_OF_MONTH |
| 1139 | // case 16: // 'K' - HOUR: 0-based. eg, 11PM + 1 hour =>> 0 AM |
| 1140 | if (current == null) { |
| 1141 | zeroPaddingNumber(value, count, maxIntCount, buffer); |
| 1142 | } |
| 1143 | break; |
| 1144 | } // switch (patternCharIndex) |
| 1145 | |
| 1146 | if (current != null) { |
| 1147 | buffer.append(current); |
| 1148 | } |
| 1149 | |
| 1150 | int fieldID = PATTERN_INDEX_TO_DATE_FORMAT_FIELD[patternCharIndex]; |
| 1151 | Field f = PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID[patternCharIndex]; |
| 1152 | |
| 1153 | delegate.formatted(fieldID, f, f, beginOffset, buffer.length(), buffer); |
| 1154 | } |
| 1155 | |
| 1156 | /** |
| 1157 | * Formats a number with the specified minimum and maximum number of digits. |
| 1158 | */ |
| 1159 | private final void zeroPaddingNumber(int value, int minDigits, int maxDigits, StringBuffer buffer) |
| 1160 | { |
| 1161 | // Optimization for 1, 2 and 4 digit numbers. This should |
| 1162 | // cover most cases of formatting date/time related items. |
| 1163 | // Note: This optimization code assumes that maxDigits is |
| 1164 | // either 2 or Integer.MAX_VALUE (maxIntCount in format()). |
| 1165 | try { |
| 1166 | if (zeroDigit == 0) { |
| 1167 | zeroDigit = ((DecimalFormat)numberFormat).getDecimalFormatSymbols().getZeroDigit(); |
| 1168 | } |
| 1169 | if (value >= 0) { |
| 1170 | if (value < 100 && minDigits >= 1 && minDigits <= 2) { |
| 1171 | if (value < 10) { |
| 1172 | if (minDigits == 2) { |
| 1173 | buffer.append(zeroDigit); |
| 1174 | } |
| 1175 | buffer.append((char)(zeroDigit + value)); |
| 1176 | } else { |
| 1177 | buffer.append((char)(zeroDigit + value / 10)); |
| 1178 | buffer.append((char)(zeroDigit + value % 10)); |
| 1179 | } |
| 1180 | return; |
| 1181 | } else if (value >= 1000 && value < 10000) { |
| 1182 | if (minDigits == 4) { |
| 1183 | buffer.append((char)(zeroDigit + value / 1000)); |
| 1184 | value %= 1000; |
| 1185 | buffer.append((char)(zeroDigit + value / 100)); |
| 1186 | value %= 100; |
| 1187 | buffer.append((char)(zeroDigit + value / 10)); |
| 1188 | buffer.append((char)(zeroDigit + value % 10)); |
| 1189 | return; |
| 1190 | } |
| 1191 | if (minDigits == 2 && maxDigits == 2) { |
| 1192 | zeroPaddingNumber(value % 100, 2, 2, buffer); |
| 1193 | return; |
| 1194 | } |
| 1195 | } |
| 1196 | } |
| 1197 | } catch (Exception e) { |
| 1198 | } |
| 1199 | |
| 1200 | numberFormat.setMinimumIntegerDigits(minDigits); |
| 1201 | numberFormat.setMaximumIntegerDigits(maxDigits); |
| 1202 | numberFormat.format((long)value, buffer, DontCareFieldPosition.INSTANCE); |
| 1203 | } |
| 1204 | |
| 1205 | |
| 1206 | /** |
| 1207 | * Parses text from a string to produce a <code>Date</code>. |
| 1208 | * <p> |
| 1209 | * The method attempts to parse text starting at the index given by |
| 1210 | * <code>pos</code>. |
| 1211 | * If parsing succeeds, then the index of <code>pos</code> is updated |
| 1212 | * to the index after the last character used (parsing does not necessarily |
| 1213 | * use all characters up to the end of the string), and the parsed |
| 1214 | * date is returned. The updated <code>pos</code> can be used to |
| 1215 | * indicate the starting point for the next call to this method. |
| 1216 | * If an error occurs, then the index of <code>pos</code> is not |
| 1217 | * changed, the error index of <code>pos</code> is set to the index of |
| 1218 | * the character where the error occurred, and null is returned. |
| 1219 | * |
| 1220 | * @param text A <code>String</code>, part of which should be parsed. |
| 1221 | * @param pos A <code>ParsePosition</code> object with index and error |
| 1222 | * index information as described above. |
| 1223 | * @return A <code>Date</code> parsed from the string. In case of |
| 1224 | * error, returns null. |
| 1225 | * @exception NullPointerException if <code>text</code> or <code>pos</code> is null. |
| 1226 | */ |
| 1227 | public Date parse(String text, ParsePosition pos) |
| 1228 | { |
| 1229 | int start = pos.index; |
| 1230 | int oldStart = start; |
| 1231 | int textLength = text.length(); |
| 1232 | |
| 1233 | calendar.clear(); // Clears all the time fields |
| 1234 | |
| 1235 | boolean[] ambiguousYear = {false}; |
| 1236 | |
| 1237 | |
| 1238 | for (int i = 0; i < compiledPattern.length; ) { |
| 1239 | int tag = compiledPattern[i] >>> 8; |
| 1240 | int count = compiledPattern[i++] & 0xff; |
| 1241 | if (count == 255) { |
| 1242 | count = compiledPattern[i++] << 16; |
| 1243 | count |= compiledPattern[i++]; |
| 1244 | } |
| 1245 | |
| 1246 | switch (tag) { |
| 1247 | case TAG_QUOTE_ASCII_CHAR: |
| 1248 | if (start >= textLength || text.charAt(start) != (char)count) { |
| 1249 | pos.index = oldStart; |
| 1250 | pos.errorIndex = start; |
| 1251 | return null; |
| 1252 | } |
| 1253 | start++; |
| 1254 | break; |
| 1255 | |
| 1256 | case TAG_QUOTE_CHARS: |
| 1257 | while (count-- > 0) { |
| 1258 | if (start >= textLength || text.charAt(start) != compiledPattern[i++]) { |
| 1259 | pos.index = oldStart; |
| 1260 | pos.errorIndex = start; |
| 1261 | return null; |
| 1262 | } |
| 1263 | start++; |
| 1264 | } |
| 1265 | break; |
| 1266 | |
| 1267 | default: |
| 1268 | // Peek the next pattern to determine if we need to |
| 1269 | // obey the number of pattern letters for |
| 1270 | // parsing. It's required when parsing contiguous |
| 1271 | // digit text (e.g., "20010704") with a pattern which |
| 1272 | // has no delimiters between fields, like "yyyyMMdd". |
| 1273 | boolean obeyCount = false; |
| 1274 | if (i < compiledPattern.length) { |
| 1275 | int nextTag = compiledPattern[i] >>> 8; |
| 1276 | if (!(nextTag == TAG_QUOTE_ASCII_CHAR || nextTag == TAG_QUOTE_CHARS)) { |
| 1277 | obeyCount = true; |
| 1278 | } |
| 1279 | } |
| 1280 | start = subParse(text, start, tag, count, obeyCount, |
| 1281 | ambiguousYear, pos); |
| 1282 | if (start < 0) { |
| 1283 | pos.index = oldStart; |
| 1284 | return null; |
| 1285 | } |
| 1286 | } |
| 1287 | } |
| 1288 | |
| 1289 | // At this point the fields of Calendar have been set. Calendar |
| 1290 | // will fill in default values for missing fields when the time |
| 1291 | // is computed. |
| 1292 | |
| 1293 | pos.index = start; |
| 1294 | |
| 1295 | // This part is a problem: When we call parsedDate.after, we compute the time. |
| 1296 | // Take the date April 3 2004 at 2:30 am. When this is first set up, the year |
| 1297 | // will be wrong if we're parsing a 2-digit year pattern. It will be 1904. |
| 1298 | // April 3 1904 is a Sunday (unlike 2004) so it is the DST onset day. 2:30 am |
| 1299 | // is therefore an "impossible" time, since the time goes from 1:59 to 3:00 am |
| 1300 | // on that day. It is therefore parsed out to fields as 3:30 am. Then we |
| 1301 | // add 100 years, and get April 3 2004 at 3:30 am. Note that April 3 2004 is |
| 1302 | // a Saturday, so it can have a 2:30 am -- and it should. [LIU] |
| 1303 | /* |
| 1304 | Date parsedDate = calendar.getTime(); |
| 1305 | if( ambiguousYear[0] && !parsedDate.after(defaultCenturyStart) ) { |
| 1306 | calendar.add(Calendar.YEAR, 100); |
| 1307 | parsedDate = calendar.getTime(); |
| 1308 | } |
| 1309 | */ |
| 1310 | // Because of the above condition, save off the fields in case we need to readjust. |
| 1311 | // The procedure we use here is not particularly efficient, but there is no other |
| 1312 | // way to do this given the API restrictions present in Calendar. We minimize |
| 1313 | // inefficiency by only performing this computation when it might apply, that is, |
| 1314 | // when the two-digit year is equal to the start year, and thus might fall at the |
| 1315 | // front or the back of the default century. This only works because we adjust |
| 1316 | // the year correctly to start with in other cases -- see subParse(). |
| 1317 | Date parsedDate; |
| 1318 | try { |
| 1319 | if (ambiguousYear[0]) // If this is true then the two-digit year == the default start year |
| 1320 | { |
| 1321 | // We need a copy of the fields, and we need to avoid triggering a call to |
| 1322 | // complete(), which will recalculate the fields. Since we can't access |
| 1323 | // the fields[] array in Calendar, we clone the entire object. This will |
| 1324 | // stop working if Calendar.clone() is ever rewritten to call complete(). |
| 1325 | Calendar savedCalendar = (Calendar)calendar.clone(); |
| 1326 | parsedDate = calendar.getTime(); |
| 1327 | if (parsedDate.before(defaultCenturyStart)) |
| 1328 | { |
| 1329 | // We can't use add here because that does a complete() first. |
| 1330 | savedCalendar.set(Calendar.YEAR, defaultCenturyStartYear + 100); |
| 1331 | parsedDate = savedCalendar.getTime(); |
| 1332 | } |
| 1333 | } |
| 1334 | else parsedDate = calendar.getTime(); |
| 1335 | } |
| 1336 | // An IllegalArgumentException will be thrown by Calendar.getTime() |
| 1337 | // if any fields are out of range, e.g., MONTH == 17. |
| 1338 | catch (IllegalArgumentException e) { |
| 1339 | pos.errorIndex = start; |
| 1340 | pos.index = oldStart; |
| 1341 | return null; |
| 1342 | } |
| 1343 | |
| 1344 | return parsedDate; |
| 1345 | } |
| 1346 | |
| 1347 | /** |
| 1348 | * Private code-size reduction function used by subParse. |
| 1349 | * @param text the time text being parsed. |
| 1350 | * @param start where to start parsing. |
| 1351 | * @param field the date field being parsed. |
| 1352 | * @param data the string array to parsed. |
| 1353 | * @return the new start position if matching succeeded; a negative number |
| 1354 | * indicating matching failure, otherwise. |
| 1355 | */ |
| 1356 | private int matchString(String text, int start, int field, String[] data) |
| 1357 | { |
| 1358 | int i = 0; |
| 1359 | int count = data.length; |
| 1360 | |
| 1361 | if (field == Calendar.DAY_OF_WEEK) i = 1; |
| 1362 | |
| 1363 | // There may be multiple strings in the data[] array which begin with |
| 1364 | // the same prefix (e.g., Cerven and Cervenec (June and July) in Czech). |
| 1365 | // We keep track of the longest match, and return that. Note that this |
| 1366 | // unfortunately requires us to test all array elements. |
| 1367 | int bestMatchLength = 0, bestMatch = -1; |
| 1368 | for (; i<count; ++i) |
| 1369 | { |
| 1370 | int length = data[i].length(); |
| 1371 | // Always compare if we have no match yet; otherwise only compare |
| 1372 | // against potentially better matches (longer strings). |
| 1373 | if (length > bestMatchLength && |
| 1374 | text.regionMatches(true, start, data[i], 0, length)) |
| 1375 | { |
| 1376 | bestMatch = i; |
| 1377 | bestMatchLength = length; |
| 1378 | } |
| 1379 | } |
| 1380 | if (bestMatch >= 0) |
| 1381 | { |
| 1382 | calendar.set(field, bestMatch); |
| 1383 | return start + bestMatchLength; |
| 1384 | } |
| 1385 | return -start; |
| 1386 | } |
| 1387 | |
| 1388 | /** |
| 1389 | * Performs the same thing as matchString(String, int, int, |
| 1390 | * String[]). This method takes a Map<String, Integer> instead of |
| 1391 | * String[]. |
| 1392 | */ |
| 1393 | private int matchString(String text, int start, int field, Map<String,Integer> data) { |
| 1394 | if (data != null) { |
| 1395 | String bestMatch = null; |
| 1396 | |
| 1397 | for (String name : data.keySet()) { |
| 1398 | int length = name.length(); |
| 1399 | if (bestMatch == null || length > bestMatch.length()) { |
| 1400 | if (text.regionMatches(true, start, name, 0, length)) { |
| 1401 | bestMatch = name; |
| 1402 | } |
| 1403 | } |
| 1404 | } |
| 1405 | |
| 1406 | if (bestMatch != null) { |
| 1407 | calendar.set(field, data.get(bestMatch)); |
| 1408 | return start + bestMatch.length(); |
| 1409 | } |
| 1410 | } |
| 1411 | return -start; |
| 1412 | } |
| 1413 | |
| 1414 | private int matchZoneString(String text, int start, String[] zoneNames) { |
| 1415 | for (int i = 1; i <= 4; ++i) { |
| 1416 | // Checking long and short zones [1 & 2], |
| 1417 | // and long and short daylight [3 & 4]. |
| 1418 | String zoneName = zoneNames[i]; |
| 1419 | if (text.regionMatches(true, start, |
| 1420 | zoneName, 0, zoneName.length())) { |
| 1421 | return i; |
| 1422 | } |
| 1423 | } |
| 1424 | return -1; |
| 1425 | } |
| 1426 | |
| 1427 | /** |
| 1428 | * find time zone 'text' matched zoneStrings and set to internal |
| 1429 | * calendar. |
| 1430 | */ |
| 1431 | private int subParseZoneString(String text, int start) { |
| 1432 | boolean useSameName = false; // true if standard and daylight time use the same abbreviation. |
| 1433 | TimeZone currentTimeZone = getTimeZone(); |
| 1434 | |
| 1435 | // At this point, check for named time zones by looking through |
| 1436 | // the locale data from the TimeZoneNames strings. |
| 1437 | // Want to be able to parse both short and long forms. |
| 1438 | int zoneIndex = formatData.getZoneIndex(currentTimeZone.getID()); |
| 1439 | TimeZone tz = null; |
| 1440 | String[][] zoneStrings = formatData.getZoneStringsWrapper(); |
| 1441 | String[] zoneNames = null; |
| 1442 | int nameIndex = 0; |
| 1443 | if (zoneIndex != -1) { |
| 1444 | zoneNames = zoneStrings[zoneIndex]; |
| 1445 | if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) { |
| 1446 | if (nameIndex <= 2) { |
| 1447 | // Check if the standard name (abbr) and the daylight name are the same. |
| 1448 | useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]); |
| 1449 | } |
| 1450 | tz = TimeZone.getTimeZone(zoneNames[0]); |
| 1451 | } |
| 1452 | } |
| 1453 | if (tz == null) { |
| 1454 | zoneIndex = formatData.getZoneIndex(TimeZone.getDefault().getID()); |
| 1455 | if (zoneIndex != -1) { |
| 1456 | zoneNames = zoneStrings[zoneIndex]; |
| 1457 | if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) { |
| 1458 | if (nameIndex <= 2) { |
| 1459 | useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]); |
| 1460 | } |
| 1461 | tz = TimeZone.getTimeZone(zoneNames[0]); |
| 1462 | } |
| 1463 | } |
| 1464 | } |
| 1465 | if (tz == null) { |
| 1466 | int len = zoneStrings.length; |
| 1467 | for (int i = 0; i < len; i++) { |
| 1468 | zoneNames = zoneStrings[i]; |
| 1469 | if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) { |
| 1470 | if (nameIndex <= 2) { |
| 1471 | useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]); |
| 1472 | } |
| 1473 | tz = TimeZone.getTimeZone(zoneNames[0]); |
| 1474 | break; |
| 1475 | } |
| 1476 | } |
| 1477 | } |
| 1478 | if (tz != null) { // Matched any ? |
| 1479 | if (!tz.equals(currentTimeZone)) { |
| 1480 | setTimeZone(tz); |
| 1481 | } |
| 1482 | // If the time zone matched uses the same name |
| 1483 | // (abbreviation) for both standard and daylight time, |
| 1484 | // let the time zone in the Calendar decide which one. |
| 1485 | if (!useSameName) { |
| 1486 | calendar.set(Calendar.ZONE_OFFSET, tz.getRawOffset()); |
| 1487 | calendar.set(Calendar.DST_OFFSET, |
| 1488 | nameIndex >= 3 ? tz.getDSTSavings() : 0); |
| 1489 | } |
| 1490 | return (start + zoneNames[nameIndex].length()); |
| 1491 | } |
| 1492 | return 0; |
| 1493 | } |
| 1494 | |
| 1495 | /** |
| 1496 | * Private member function that converts the parsed date strings into |
| 1497 | * timeFields. Returns -start (for ParsePosition) if failed. |
| 1498 | * @param text the time text to be parsed. |
| 1499 | * @param start where to start parsing. |
| 1500 | * @param ch the pattern character for the date field text to be parsed. |
| 1501 | * @param count the count of a pattern character. |
| 1502 | * @param obeyCount if true, then the next field directly abuts this one, |
| 1503 | * and we should use the count to know when to stop parsing. |
| 1504 | * @param ambiguousYear return parameter; upon return, if ambiguousYear[0] |
| 1505 | * is true, then a two-digit year was parsed and may need to be readjusted. |
| 1506 | * @param origPos origPos.errorIndex is used to return an error index |
| 1507 | * at which a parse error occurred, if matching failure occurs. |
| 1508 | * @return the new start position if matching succeeded; -1 indicating |
| 1509 | * matching failure, otherwise. In case matching failure occurred, |
| 1510 | * an error index is set to origPos.errorIndex. |
| 1511 | */ |
| 1512 | private int subParse(String text, int start, int patternCharIndex, int count, |
| 1513 | boolean obeyCount, boolean[] ambiguousYear, |
| 1514 | ParsePosition origPos) |
| 1515 | { |
| 1516 | Number number = null; |
| 1517 | int value = 0; |
| 1518 | ParsePosition pos = new ParsePosition(0); |
| 1519 | pos.index = start; |
| 1520 | int field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex]; |
| 1521 | |
| 1522 | // If there are any spaces here, skip over them. If we hit the end |
| 1523 | // of the string, then fail. |
| 1524 | for (;;) { |
| 1525 | if (pos.index >= text.length()) { |
| 1526 | origPos.errorIndex = start; |
| 1527 | return -1; |
| 1528 | } |
| 1529 | char c = text.charAt(pos.index); |
| 1530 | if (c != ' ' && c != '\t') break; |
| 1531 | ++pos.index; |
| 1532 | } |
| 1533 | |
| 1534 | parsing: |
| 1535 | { |
| 1536 | // We handle a few special cases here where we need to parse |
| 1537 | // a number value. We handle further, more generic cases below. We need |
| 1538 | // to handle some of them here because some fields require extra processing on |
| 1539 | // the parsed value. |
| 1540 | if (patternCharIndex == 4 /*HOUR_OF_DAY1_FIELD*/ || |
| 1541 | patternCharIndex == 15 /*HOUR1_FIELD*/ || |
| 1542 | (patternCharIndex == 2 /*MONTH_FIELD*/ && count <= 2) || |
| 1543 | patternCharIndex == 1) { |
| 1544 | // It would be good to unify this with the obeyCount logic below, |
| 1545 | // but that's going to be difficult. |
| 1546 | if (obeyCount) { |
| 1547 | if ((start+count) > text.length()) { |
| 1548 | break parsing; |
| 1549 | } |
| 1550 | number = numberFormat.parse(text.substring(0, start+count), pos); |
| 1551 | } else { |
| 1552 | number = numberFormat.parse(text, pos); |
| 1553 | } |
| 1554 | if (number == null) { |
| 1555 | if (patternCharIndex != 1 || calendar instanceof GregorianCalendar) { |
| 1556 | break parsing; |
| 1557 | } |
| 1558 | } else { |
| 1559 | value = number.intValue(); |
| 1560 | } |
| 1561 | } |
| 1562 | |
| 1563 | boolean useDateFormatSymbols = useDateFormatSymbols(); |
| 1564 | |
| 1565 | int index; |
| 1566 | switch (patternCharIndex) { |
| 1567 | case 0: // 'G' - ERA |
| 1568 | if (useDateFormatSymbols) { |
| 1569 | if ((index = matchString(text, start, Calendar.ERA, formatData.getEras())) > 0) { |
| 1570 | return index; |
| 1571 | } |
| 1572 | } else { |
| 1573 | Map<String, Integer> map = calendar.getDisplayNames(field, |
| 1574 | Calendar.ALL_STYLES, |
| 1575 | locale); |
| 1576 | if ((index = matchString(text, start, field, map)) > 0) { |
| 1577 | return index; |
| 1578 | } |
| 1579 | } |
| 1580 | break parsing; |
| 1581 | |
| 1582 | case 1: // 'y' - YEAR |
| 1583 | if (!(calendar instanceof GregorianCalendar)) { |
| 1584 | // calendar might have text representations for year values, |
| 1585 | // such as "\u5143" in JapaneseImperialCalendar. |
| 1586 | int style = (count >= 4) ? Calendar.LONG : Calendar.SHORT; |
| 1587 | Map<String, Integer> map = calendar.getDisplayNames(field, style, locale); |
| 1588 | if (map != null) { |
| 1589 | if ((index = matchString(text, start, field, map)) > 0) { |
| 1590 | return index; |
| 1591 | } |
| 1592 | } |
| 1593 | calendar.set(field, value); |
| 1594 | return pos.index; |
| 1595 | } |
| 1596 | |
| 1597 | // If there are 3 or more YEAR pattern characters, this indicates |
| 1598 | // that the year value is to be treated literally, without any |
| 1599 | // two-digit year adjustments (e.g., from "01" to 2001). Otherwise |
| 1600 | // we made adjustments to place the 2-digit year in the proper |
| 1601 | // century, for parsed strings from "00" to "99". Any other string |
| 1602 | // is treated literally: "2250", "-1", "1", "002". |
| 1603 | if (count <= 2 && (pos.index - start) == 2 |
| 1604 | && Character.isDigit(text.charAt(start)) |
| 1605 | && Character.isDigit(text.charAt(start+1))) |
| 1606 | { |
| 1607 | // Assume for example that the defaultCenturyStart is 6/18/1903. |
| 1608 | // This means that two-digit years will be forced into the range |
| 1609 | // 6/18/1903 to 6/17/2003. As a result, years 00, 01, and 02 |
| 1610 | // correspond to 2000, 2001, and 2002. Years 04, 05, etc. correspond |
| 1611 | // to 1904, 1905, etc. If the year is 03, then it is 2003 if the |
| 1612 | // other fields specify a date before 6/18, or 1903 if they specify a |
| 1613 | // date afterwards. As a result, 03 is an ambiguous year. All other |
| 1614 | // two-digit years are unambiguous. |
| 1615 | int ambiguousTwoDigitYear = defaultCenturyStartYear % 100; |
| 1616 | ambiguousYear[0] = value == ambiguousTwoDigitYear; |
| 1617 | value += (defaultCenturyStartYear/100)*100 + |
| 1618 | (value < ambiguousTwoDigitYear ? 100 : 0); |
| 1619 | } |
| 1620 | calendar.set(Calendar.YEAR, value); |
| 1621 | return pos.index; |
| 1622 | |
| 1623 | case 2: // 'M' - MONTH |
| 1624 | if (count <= 2) // i.e., M or MM. |
| 1625 | { |
| 1626 | // Don't want to parse the month if it is a string |
| 1627 | // while pattern uses numeric style: M or MM. |
| 1628 | // [We computed 'value' above.] |
| 1629 | calendar.set(Calendar.MONTH, value - 1); |
| 1630 | return pos.index; |
| 1631 | } |
| 1632 | |
| 1633 | if (useDateFormatSymbols) { |
| 1634 | // count >= 3 // i.e., MMM or MMMM |
| 1635 | // Want to be able to parse both short and long forms. |
| 1636 | // Try count == 4 first: |
| 1637 | int newStart = 0; |
| 1638 | if ((newStart = matchString(text, start, Calendar.MONTH, |
| 1639 | formatData.getMonths())) > 0) { |
| 1640 | return newStart; |
| 1641 | } |
| 1642 | // count == 4 failed, now try count == 3 |
| 1643 | if ((index = matchString(text, start, Calendar.MONTH, |
| 1644 | formatData.getShortMonths())) > 0) { |
| 1645 | return index; |
| 1646 | } |
| 1647 | } else { |
| 1648 | Map<String, Integer> map = calendar.getDisplayNames(field, |
| 1649 | Calendar.ALL_STYLES, |
| 1650 | locale); |
| 1651 | if ((index = matchString(text, start, field, map)) > 0) { |
| 1652 | return index; |
| 1653 | } |
| 1654 | } |
| 1655 | break parsing; |
| 1656 | |
| 1657 | case 4: // 'k' - HOUR_OF_DAY: 1-based. eg, 23:59 + 1 hour =>> 24:59 |
| 1658 | // [We computed 'value' above.] |
| 1659 | if (value == calendar.getMaximum(Calendar.HOUR_OF_DAY)+1) value = 0; |
| 1660 | calendar.set(Calendar.HOUR_OF_DAY, value); |
| 1661 | return pos.index; |
| 1662 | |
| 1663 | case 9: |
| 1664 | { // 'E' - DAY_OF_WEEK |
| 1665 | if (useDateFormatSymbols) { |
| 1666 | // Want to be able to parse both short and long forms. |
| 1667 | // Try count == 4 (DDDD) first: |
| 1668 | int newStart = 0; |
| 1669 | if ((newStart=matchString(text, start, Calendar.DAY_OF_WEEK, |
| 1670 | formatData.getWeekdays())) > 0) { |
| 1671 | return newStart; |
| 1672 | } |
| 1673 | // DDDD failed, now try DDD |
| 1674 | if ((index = matchString(text, start, Calendar.DAY_OF_WEEK, |
| 1675 | formatData.getShortWeekdays())) > 0) { |
| 1676 | return index; |
| 1677 | } |
| 1678 | } else { |
| 1679 | int[] styles = { Calendar.LONG, Calendar.SHORT }; |
| 1680 | for (int style : styles) { |
| 1681 | Map<String,Integer> map = calendar.getDisplayNames(field, style, locale); |
| 1682 | if ((index = matchString(text, start, field, map)) > 0) { |
| 1683 | return index; |
| 1684 | } |
| 1685 | } |
| 1686 | } |
| 1687 | } |
| 1688 | break parsing; |
| 1689 | |
| 1690 | case 14: // 'a' - AM_PM |
| 1691 | if (useDateFormatSymbols) { |
| 1692 | if ((index = matchString(text, start, Calendar.AM_PM, formatData.getAmPmStrings())) > 0) { |
| 1693 | return index; |
| 1694 | } |
| 1695 | } else { |
| 1696 | Map<String,Integer> map = calendar.getDisplayNames(field, Calendar.ALL_STYLES, locale); |
| 1697 | if ((index = matchString(text, start, field, map)) > 0) { |
| 1698 | return index; |
| 1699 | } |
| 1700 | } |
| 1701 | break parsing; |
| 1702 | |
| 1703 | case 15: // 'h' - HOUR:1-based. eg, 11PM + 1 hour =>> 12 AM |
| 1704 | // [We computed 'value' above.] |
| 1705 | if (value == calendar.getLeastMaximum(Calendar.HOUR)+1) value = 0; |
| 1706 | calendar.set(Calendar.HOUR, value); |
| 1707 | return pos.index; |
| 1708 | |
| 1709 | case 17: // 'z' - ZONE_OFFSET |
| 1710 | case 18: // 'Z' - ZONE_OFFSET |
| 1711 | // First try to parse generic forms such as GMT-07:00. Do this first |
| 1712 | // in case localized TimeZoneNames contains the string "GMT" |
| 1713 | // for a zone; in that case, we don't want to match the first three |
| 1714 | // characters of GMT+/-hh:mm etc. |
| 1715 | { |
| 1716 | int sign = 0; |
| 1717 | int offset; |
| 1718 | |
| 1719 | // For time zones that have no known names, look for strings |
| 1720 | // of the form: |
| 1721 | // GMT[+-]hours:minutes or |
| 1722 | // GMT. |
| 1723 | if ((text.length() - start) >= GMT.length() && |
| 1724 | text.regionMatches(true, start, GMT, 0, GMT.length())) { |
| 1725 | int num; |
| 1726 | calendar.set(Calendar.DST_OFFSET, 0); |
| 1727 | pos.index = start + GMT.length(); |
| 1728 | |
| 1729 | try { // try-catch for "GMT" only time zone string |
| 1730 | char c = text.charAt(pos.index); |
| 1731 | if (c == '+') { |
| 1732 | sign = 1; |
| 1733 | } else if (c == '-') { |
| 1734 | sign = -1; |
| 1735 | } |
| 1736 | } |
| 1737 | catch(StringIndexOutOfBoundsException e) {} |
| 1738 | |
| 1739 | if (sign == 0) { /* "GMT" without offset */ |
| 1740 | calendar.set(Calendar.ZONE_OFFSET, 0); |
| 1741 | return pos.index; |
| 1742 | } |
| 1743 | |
| 1744 | // Look for hours. |
| 1745 | try { |
| 1746 | char c = text.charAt(++pos.index); |
| 1747 | if (c < '0' || c > '9') { /* must be from '0' to '9'. */ |
| 1748 | break parsing; |
| 1749 | } |
| 1750 | num = c - '0'; |
| 1751 | |
| 1752 | if (text.charAt(++pos.index) != ':') { |
| 1753 | c = text.charAt(pos.index); |
| 1754 | if (c < '0' || c > '9') { /* must be from '0' to '9'. */ |
| 1755 | break parsing; |
| 1756 | } |
| 1757 | num *= 10; |
| 1758 | num += c - '0'; |
| 1759 | pos.index++; |
| 1760 | } |
| 1761 | if (num > 23) { |
| 1762 | --pos.index; |
| 1763 | break parsing; |
| 1764 | } |
| 1765 | if (text.charAt(pos.index) != ':') { |
| 1766 | break parsing; |
| 1767 | } |
| 1768 | |
| 1769 | // Look for minutes. |
| 1770 | offset = num * 60; |
| 1771 | c = text.charAt(++pos.index); |
| 1772 | if (c < '0' || c > '9') { /* must be from '0' to '9'. */ |
| 1773 | break parsing; |
| 1774 | } |
| 1775 | num = c - '0'; |
| 1776 | c = text.charAt(++pos.index); |
| 1777 | if (c < '0' || c > '9') { /* must be from '0' to '9'. */ |
| 1778 | break parsing; |
| 1779 | } |
| 1780 | num *= 10; |
| 1781 | num += c - '0'; |
| 1782 | |
| 1783 | if (num > 59) { |
| 1784 | break parsing; |
| 1785 | } |
| 1786 | } catch (StringIndexOutOfBoundsException e) { |
| 1787 | break parsing; |
| 1788 | } |
| 1789 | offset += num; |
| 1790 | // Fall through for final processing below of 'offset' and 'sign'. |
| 1791 | } else { |
| 1792 | // If the first character is a sign, look for numeric timezones of |
| 1793 | // the form [+-]hhmm as specified by RFC 822. Otherwise, check |
| 1794 | // for named time zones by looking through the locale data from |
| 1795 | // the TimeZoneNames strings. |
| 1796 | try { |
| 1797 | char c = text.charAt(pos.index); |
| 1798 | if (c == '+') { |
| 1799 | sign = 1; |
| 1800 | } else if (c == '-') { |
| 1801 | sign = -1; |
| 1802 | } else { |
| 1803 | // Try parsing the text as a time zone name (abbr). |
| 1804 | int i = subParseZoneString(text, pos.index); |
| 1805 | if (i != 0) { |
| 1806 | return i; |
| 1807 | } |
| 1808 | break parsing; |
| 1809 | } |
| 1810 | |
| 1811 | // Parse the text as an RFC 822 time zone string. This code is |
| 1812 | // actually a little more permissive than RFC 822. It will |
| 1813 | // try to do its best with numbers that aren't strictly 4 |
| 1814 | // digits long. |
| 1815 | |
| 1816 | // Look for hh. |
| 1817 | int hours = 0; |
| 1818 | c = text.charAt(++pos.index); |
| 1819 | if (c < '0' || c > '9') { /* must be from '0' to '9'. */ |
| 1820 | break parsing; |
| 1821 | } |
| 1822 | hours = c - '0'; |
| 1823 | c = text.charAt(++pos.index); |
| 1824 | if (c < '0' || c > '9') { /* must be from '0' to '9'. */ |
| 1825 | break parsing; |
| 1826 | } |
| 1827 | hours *= 10; |
| 1828 | hours += c - '0'; |
| 1829 | |
| 1830 | if (hours > 23) { |
| 1831 | break parsing; |
| 1832 | } |
| 1833 | |
| 1834 | // Look for mm. |
| 1835 | int minutes = 0; |
| 1836 | c = text.charAt(++pos.index); |
| 1837 | if (c < '0' || c > '9') { /* must be from '0' to '9'. */ |
| 1838 | break parsing; |
| 1839 | } |
| 1840 | minutes = c - '0'; |
| 1841 | c = text.charAt(++pos.index); |
| 1842 | if (c < '0' || c > '9') { /* must be from '0' to '9'. */ |
| 1843 | break parsing; |
| 1844 | } |
| 1845 | minutes *= 10; |
| 1846 | minutes += c - '0'; |
| 1847 | |
| 1848 | if (minutes > 59) { |
| 1849 | break parsing; |
| 1850 | } |
| 1851 | |
| 1852 | offset = hours * 60 + minutes; |
| 1853 | } catch (StringIndexOutOfBoundsException e) { |
| 1854 | break parsing; |
| 1855 | } |
| 1856 | } |
| 1857 | |
| 1858 | // Do the final processing for both of the above cases. We only |
| 1859 | // arrive here if the form GMT+/-... or an RFC 822 form was seen. |
| 1860 | if (sign != 0) { |
| 1861 | offset *= MILLIS_PER_MINUTE * sign; |
| 1862 | calendar.set(Calendar.ZONE_OFFSET, offset); |
| 1863 | calendar.set(Calendar.DST_OFFSET, 0); |
| 1864 | return ++pos.index; |
| 1865 | } |
| 1866 | } |
| 1867 | break parsing; |
| 1868 | |
| 1869 | default: |
| 1870 | // case 3: // 'd' - DATE |
| 1871 | // case 5: // 'H' - HOUR_OF_DAY:0-based. eg, 23:59 + 1 hour =>> 00:59 |
| 1872 | // case 6: // 'm' - MINUTE |
| 1873 | // case 7: // 's' - SECOND |
| 1874 | // case 8: // 'S' - MILLISECOND |
| 1875 | // case 10: // 'D' - DAY_OF_YEAR |
| 1876 | // case 11: // 'F' - DAY_OF_WEEK_IN_MONTH |
| 1877 | // case 12: // 'w' - WEEK_OF_YEAR |
| 1878 | // case 13: // 'W' - WEEK_OF_MONTH |
| 1879 | // case 16: // 'K' - HOUR: 0-based. eg, 11PM + 1 hour =>> 0 AM |
| 1880 | |
| 1881 | // Handle "generic" fields |
| 1882 | if (obeyCount) { |
| 1883 | if ((start+count) > text.length()) { |
| 1884 | break parsing; |
| 1885 | } |
| 1886 | number = numberFormat.parse(text.substring(0, start+count), pos); |
| 1887 | } else { |
| 1888 | number = numberFormat.parse(text, pos); |
| 1889 | } |
| 1890 | if (number != null) { |
| 1891 | calendar.set(field, number.intValue()); |
| 1892 | return pos.index; |
| 1893 | } |
| 1894 | break parsing; |
| 1895 | } |
| 1896 | } |
| 1897 | |
| 1898 | // Parsing failed. |
| 1899 | origPos.errorIndex = pos.index; |
| 1900 | return -1; |
| 1901 | } |
| 1902 | |
| 1903 | private final String getCalendarName() { |
| 1904 | return calendar.getClass().getName(); |
| 1905 | } |
| 1906 | |
| 1907 | private boolean useDateFormatSymbols() { |
| 1908 | if (useDateFormatSymbols) { |
| 1909 | return true; |
| 1910 | } |
| 1911 | return isGregorianCalendar() || locale == null; |
| 1912 | } |
| 1913 | |
| 1914 | private boolean isGregorianCalendar() { |
| 1915 | return "java.util.GregorianCalendar".equals(getCalendarName()); |
| 1916 | } |
| 1917 | |
| 1918 | /** |
| 1919 | * Translates a pattern, mapping each character in the from string to the |
| 1920 | * corresponding character in the to string. |
| 1921 | * |
| 1922 | * @exception IllegalArgumentException if the given pattern is invalid |
| 1923 | */ |
| 1924 | private String translatePattern(String pattern, String from, String to) { |
| 1925 | StringBuilder result = new StringBuilder(); |
| 1926 | boolean inQuote = false; |
| 1927 | for (int i = 0; i < pattern.length(); ++i) { |
| 1928 | char c = pattern.charAt(i); |
| 1929 | if (inQuote) { |
| 1930 | if (c == '\'') |
| 1931 | inQuote = false; |
| 1932 | } |
| 1933 | else { |
| 1934 | if (c == '\'') |
| 1935 | inQuote = true; |
| 1936 | else if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) { |
| 1937 | int ci = from.indexOf(c); |
| 1938 | if (ci == -1) |
| 1939 | throw new IllegalArgumentException("Illegal pattern " + |
| 1940 | " character '" + |
| 1941 | c + "'"); |
| 1942 | c = to.charAt(ci); |
| 1943 | } |
| 1944 | } |
| 1945 | result.append(c); |
| 1946 | } |
| 1947 | if (inQuote) |
| 1948 | throw new IllegalArgumentException("Unfinished quote in pattern"); |
| 1949 | return result.toString(); |
| 1950 | } |
| 1951 | |
| 1952 | /** |
| 1953 | * Returns a pattern string describing this date format. |
| 1954 | * |
| 1955 | * @return a pattern string describing this date format. |
| 1956 | */ |
| 1957 | public String toPattern() { |
| 1958 | return pattern; |
| 1959 | } |
| 1960 | |
| 1961 | /** |
| 1962 | * Returns a localized pattern string describing this date format. |
| 1963 | * |
| 1964 | * @return a localized pattern string describing this date format. |
| 1965 | */ |
| 1966 | public String toLocalizedPattern() { |
| 1967 | return translatePattern(pattern, |
| 1968 | DateFormatSymbols.patternChars, |
| 1969 | formatData.getLocalPatternChars()); |
| 1970 | } |
| 1971 | |
| 1972 | /** |
| 1973 | * Applies the given pattern string to this date format. |
| 1974 | * |
| 1975 | * @param pattern the new date and time pattern for this date format |
| 1976 | * @exception NullPointerException if the given pattern is null |
| 1977 | * @exception IllegalArgumentException if the given pattern is invalid |
| 1978 | */ |
| 1979 | public void applyPattern (String pattern) |
| 1980 | { |
| 1981 | compiledPattern = compile(pattern); |
| 1982 | this.pattern = pattern; |
| 1983 | } |
| 1984 | |
| 1985 | /** |
| 1986 | * Applies the given localized pattern string to this date format. |
| 1987 | * |
| 1988 | * @param pattern a String to be mapped to the new date and time format |
| 1989 | * pattern for this format |
| 1990 | * @exception NullPointerException if the given pattern is null |
| 1991 | * @exception IllegalArgumentException if the given pattern is invalid |
| 1992 | */ |
| 1993 | public void applyLocalizedPattern(String pattern) { |
| 1994 | String p = translatePattern(pattern, |
| 1995 | formatData.getLocalPatternChars(), |
| 1996 | DateFormatSymbols.patternChars); |
| 1997 | compiledPattern = compile(p); |
| 1998 | this.pattern = p; |
| 1999 | } |
| 2000 | |
| 2001 | /** |
| 2002 | * Gets a copy of the date and time format symbols of this date format. |
| 2003 | * |
| 2004 | * @return the date and time format symbols of this date format |
| 2005 | * @see #setDateFormatSymbols |
| 2006 | */ |
| 2007 | public DateFormatSymbols getDateFormatSymbols() |
| 2008 | { |
| 2009 | return (DateFormatSymbols)formatData.clone(); |
| 2010 | } |
| 2011 | |
| 2012 | /** |
| 2013 | * Sets the date and time format symbols of this date format. |
| 2014 | * |
| 2015 | * @param newFormatSymbols the new date and time format symbols |
| 2016 | * @exception NullPointerException if the given newFormatSymbols is null |
| 2017 | * @see #getDateFormatSymbols |
| 2018 | */ |
| 2019 | public void setDateFormatSymbols(DateFormatSymbols newFormatSymbols) |
| 2020 | { |
| 2021 | this.formatData = (DateFormatSymbols)newFormatSymbols.clone(); |
| 2022 | useDateFormatSymbols = true; |
| 2023 | } |
| 2024 | |
| 2025 | /** |
| 2026 | * Creates a copy of this <code>SimpleDateFormat</code>. This also |
| 2027 | * clones the format's date format symbols. |
| 2028 | * |
| 2029 | * @return a clone of this <code>SimpleDateFormat</code> |
| 2030 | */ |
| 2031 | public Object clone() { |
| 2032 | SimpleDateFormat other = (SimpleDateFormat) super.clone(); |
| 2033 | other.formatData = (DateFormatSymbols) formatData.clone(); |
| 2034 | return other; |
| 2035 | } |
| 2036 | |
| 2037 | /** |
| 2038 | * Returns the hash code value for this <code>SimpleDateFormat</code> object. |
| 2039 | * |
| 2040 | * @return the hash code value for this <code>SimpleDateFormat</code> object. |
| 2041 | */ |
| 2042 | public int hashCode() |
| 2043 | { |
| 2044 | return pattern.hashCode(); |
| 2045 | // just enough fields for a reasonable distribution |
| 2046 | } |
| 2047 | |
| 2048 | /** |
| 2049 | * Compares the given object with this <code>SimpleDateFormat</code> for |
| 2050 | * equality. |
| 2051 | * |
| 2052 | * @return true if the given object is equal to this |
| 2053 | * <code>SimpleDateFormat</code> |
| 2054 | */ |
| 2055 | public boolean equals(Object obj) |
| 2056 | { |
| 2057 | if (!super.equals(obj)) return false; // super does class check |
| 2058 | SimpleDateFormat that = (SimpleDateFormat) obj; |
| 2059 | return (pattern.equals(that.pattern) |
| 2060 | && formatData.equals(that.formatData)); |
| 2061 | } |
| 2062 | |
| 2063 | /** |
| 2064 | * After reading an object from the input stream, the format |
| 2065 | * pattern in the object is verified. |
| 2066 | * <p> |
| 2067 | * @exception InvalidObjectException if the pattern is invalid |
| 2068 | */ |
| 2069 | private void readObject(ObjectInputStream stream) |
| 2070 | throws IOException, ClassNotFoundException { |
| 2071 | stream.defaultReadObject(); |
| 2072 | |
| 2073 | try { |
| 2074 | compiledPattern = compile(pattern); |
| 2075 | } catch (Exception e) { |
| 2076 | throw new InvalidObjectException("invalid pattern"); |
| 2077 | } |
| 2078 | |
| 2079 | if (serialVersionOnStream < 1) { |
| 2080 | // didn't have defaultCenturyStart field |
| 2081 | initializeDefaultCentury(); |
| 2082 | } |
| 2083 | else { |
| 2084 | // fill in dependent transient field |
| 2085 | parseAmbiguousDatesAsAfter(defaultCenturyStart); |
| 2086 | } |
| 2087 | serialVersionOnStream = currentSerialVersion; |
| 2088 | |
| 2089 | // If the deserialized object has a SimpleTimeZone, try |
| 2090 | // to replace it with a ZoneInfo equivalent in order to |
| 2091 | // be compatible with the SimpleTimeZone-based |
| 2092 | // implementation as much as possible. |
| 2093 | TimeZone tz = getTimeZone(); |
| 2094 | if (tz instanceof SimpleTimeZone) { |
| 2095 | String id = tz.getID(); |
| 2096 | TimeZone zi = TimeZone.getTimeZone(id); |
| 2097 | if (zi != null && zi.hasSameRules(tz) && zi.getID().equals(id)) { |
| 2098 | setTimeZone(zi); |
| 2099 | } |
| 2100 | } |
| 2101 | } |
| 2102 | } |