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My first initial commit with all of mine experimental changes.

Dmitry Kabak (userdima committed 13 years ago

Commit d37b88d1 parent 3f5b46618352 files · +2598093 −-8690Browse files

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1+/*
2+ * Copyright (c) 1996, 2010, Oracle and/or its affiliates. All rights reserved.
3+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4+ *
5+ * This code is free software; you can redistribute it and/or modify it
6+ * under the terms of the GNU General Public License version 2 only, as
7+ * published by the Free Software Foundation. Oracle designates this
8+ * particular file as subject to the "Classpath" exception as provided
9+ * by Oracle in the LICENSE file that accompanied this code.
10+ *
11+ * This code is distributed in the hope that it will be useful, but WITHOUT
12+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14+ * version 2 for more details (a copy is included in the LICENSE file that
15+ * accompanied this code).
16+ *
17+ * You should have received a copy of the GNU General Public License version
18+ * 2 along with this work; if not, write to the Free Software Foundation,
19+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20+ *
21+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22+ * or visit www.oracle.com if you need additional information or have any
23+ * questions.
24+ */
25+
26+/*
27+ * (C) Copyright Taligent, Inc. 1996 - All Rights Reserved
28+ * (C) Copyright IBM Corp. 1996 - 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.InvalidObjectException;
42+import java.text.spi.DateFormatProvider;
43+import java.util.Calendar;
44+import java.util.Date;
45+import java.util.GregorianCalendar;
46+import java.util.HashMap;
47+import java.util.Locale;
48+import java.util.Map;
49+import java.util.MissingResourceException;
50+import java.util.ResourceBundle;
51+import java.util.TimeZone;
52+import java.util.spi.LocaleServiceProvider;
53+import sun.util.LocaleServiceProviderPool;
54+
55+/**
56+ * {@code DateFormat} is an abstract class for date/time formatting subclasses which
57+ * formats and parses dates or time in a language-independent manner.
58+ * The date/time formatting subclass, such as {@link SimpleDateFormat}, allows for
59+ * formatting (i.e., date -> text), parsing (text -> date), and
60+ * normalization. The date is represented as a <code>Date</code> object or
61+ * as the milliseconds since January 1, 1970, 00:00:00 GMT.
62+ *
63+ * <p>{@code DateFormat} provides many class methods for obtaining default date/time
64+ * formatters based on the default or a given locale and a number of formatting
65+ * styles. The formatting styles include {@link #FULL}, {@link #LONG}, {@link #MEDIUM}, and {@link #SHORT}. More
66+ * detail and examples of using these styles are provided in the method
67+ * descriptions.
68+ *
69+ * <p>{@code DateFormat} helps you to format and parse dates for any locale.
70+ * Your code can be completely independent of the locale conventions for
71+ * months, days of the week, or even the calendar format: lunar vs. solar.
72+ *
73+ * <p>To format a date for the current Locale, use one of the
74+ * static factory methods:
75+ * <pre>
76+ * myString = DateFormat.getDateInstance().format(myDate);
77+ * </pre>
78+ * <p>If you are formatting multiple dates, it is
79+ * more efficient to get the format and use it multiple times so that
80+ * the system doesn't have to fetch the information about the local
81+ * language and country conventions multiple times.
82+ * <pre>
83+ * DateFormat df = DateFormat.getDateInstance();
84+ * for (int i = 0; i < myDate.length; ++i) {
85+ * output.println(df.format(myDate[i]) + "; ");
86+ * }
87+ * </pre>
88+ * <p>To format a date for a different Locale, specify it in the
89+ * call to {@link #getDateInstance(int, Locale) getDateInstance()}.
90+ * <pre>
91+ * DateFormat df = DateFormat.getDateInstance(DateFormat.LONG, Locale.FRANCE);
92+ * </pre>
93+ * <p>You can use a DateFormat to parse also.
94+ * <pre>
95+ * myDate = df.parse(myString);
96+ * </pre>
97+ * <p>Use {@code getDateInstance} to get the normal date format for that country.
98+ * There are other static factory methods available.
99+ * Use {@code getTimeInstance} to get the time format for that country.
100+ * Use {@code getDateTimeInstance} to get a date and time format. You can pass in
101+ * different options to these factory methods to control the length of the
102+ * result; from {@link #SHORT} to {@link #MEDIUM} to {@link #LONG} to {@link #FULL}. The exact result depends
103+ * on the locale, but generally:
104+ * <ul><li>{@link #SHORT} is completely numeric, such as {@code 12.13.52} or {@code 3:30pm}
105+ * <li>{@link #MEDIUM} is longer, such as {@code Jan 12, 1952}
106+ * <li>{@link #LONG} is longer, such as {@code January 12, 1952} or {@code 3:30:32pm}
107+ * <li>{@link #FULL} is pretty completely specified, such as
108+ * {@code Tuesday, April 12, 1952 AD or 3:30:42pm PST}.
109+ * </ul>
110+ *
111+ * <p>You can also set the time zone on the format if you wish.
112+ * If you want even more control over the format or parsing,
113+ * (or want to give your users more control),
114+ * you can try casting the {@code DateFormat} you get from the factory methods
115+ * to a {@link SimpleDateFormat}. This will work for the majority
116+ * of countries; just remember to put it in a {@code try} block in case you
117+ * encounter an unusual one.
118+ *
119+ * <p>You can also use forms of the parse and format methods with
120+ * {@link ParsePosition} and {@link FieldPosition} to
121+ * allow you to
122+ * <ul><li>progressively parse through pieces of a string.
123+ * <li>align any particular field, or find out where it is for selection
124+ * on the screen.
125+ * </ul>
126+ *
127+ * <h4><a name="synchronization">Synchronization</a></h4>
128+ *
129+ * <p>
130+ * Date formats are not synchronized.
131+ * It is recommended to create separate format instances for each thread.
132+ * If multiple threads access a format concurrently, it must be synchronized
133+ * externally.
134+ *
135+ * @see Format
136+ * @see NumberFormat
137+ * @see SimpleDateFormat
138+ * @see java.util.Calendar
139+ * @see java.util.GregorianCalendar
140+ * @see java.util.TimeZone
141+ * @author Mark Davis, Chen-Lieh Huang, Alan Liu
142+ */
143+public abstract class DateFormat extends Format {
144+
145+ /**
146+ * The {@link Calendar} instance used for calculating the date-time fields
147+ * and the instant of time. This field is used for both formatting and
148+ * parsing.
149+ *
150+ * <p>Subclasses should initialize this field to a {@link Calendar}
151+ * appropriate for the {@link Locale} associated with this
152+ * <code>DateFormat</code>.
153+ * @serial
154+ */
155+ protected Calendar calendar;
156+
157+ /**
158+ * The number formatter that <code>DateFormat</code> uses to format numbers
159+ * in dates and times. Subclasses should initialize this to a number format
160+ * appropriate for the locale associated with this <code>DateFormat</code>.
161+ * @serial
162+ */
163+ protected NumberFormat numberFormat;
164+
165+ /**
166+ * Useful constant for ERA field alignment.
167+ * Used in FieldPosition of date/time formatting.
168+ */
169+ public final static int ERA_FIELD = 0;
170+ /**
171+ * Useful constant for YEAR field alignment.
172+ * Used in FieldPosition of date/time formatting.
173+ */
174+ public final static int YEAR_FIELD = 1;
175+ /**
176+ * Useful constant for MONTH field alignment.
177+ * Used in FieldPosition of date/time formatting.
178+ */
179+ public final static int MONTH_FIELD = 2;
180+ /**
181+ * Useful constant for DATE field alignment.
182+ * Used in FieldPosition of date/time formatting.
183+ */
184+ public final static int DATE_FIELD = 3;
185+ /**
186+ * Useful constant for one-based HOUR_OF_DAY field alignment.
187+ * Used in FieldPosition of date/time formatting.
188+ * HOUR_OF_DAY1_FIELD is used for the one-based 24-hour clock.
189+ * For example, 23:59 + 01:00 results in 24:59.
190+ */
191+ public final static int HOUR_OF_DAY1_FIELD = 4;
192+ /**
193+ * Useful constant for zero-based HOUR_OF_DAY field alignment.
194+ * Used in FieldPosition of date/time formatting.
195+ * HOUR_OF_DAY0_FIELD is used for the zero-based 24-hour clock.
196+ * For example, 23:59 + 01:00 results in 00:59.
197+ */
198+ public final static int HOUR_OF_DAY0_FIELD = 5;
199+ /**
200+ * Useful constant for MINUTE field alignment.
201+ * Used in FieldPosition of date/time formatting.
202+ */
203+ public final static int MINUTE_FIELD = 6;
204+ /**
205+ * Useful constant for SECOND field alignment.
206+ * Used in FieldPosition of date/time formatting.
207+ */
208+ public final static int SECOND_FIELD = 7;
209+ /**
210+ * Useful constant for MILLISECOND field alignment.
211+ * Used in FieldPosition of date/time formatting.
212+ */
213+ public final static int MILLISECOND_FIELD = 8;
214+ /**
215+ * Useful constant for DAY_OF_WEEK field alignment.
216+ * Used in FieldPosition of date/time formatting.
217+ */
218+ public final static int DAY_OF_WEEK_FIELD = 9;
219+ /**
220+ * Useful constant for DAY_OF_YEAR field alignment.
221+ * Used in FieldPosition of date/time formatting.
222+ */
223+ public final static int DAY_OF_YEAR_FIELD = 10;
224+ /**
225+ * Useful constant for DAY_OF_WEEK_IN_MONTH field alignment.
226+ * Used in FieldPosition of date/time formatting.
227+ */
228+ public final static int DAY_OF_WEEK_IN_MONTH_FIELD = 11;
229+ /**
230+ * Useful constant for WEEK_OF_YEAR field alignment.
231+ * Used in FieldPosition of date/time formatting.
232+ */
233+ public final static int WEEK_OF_YEAR_FIELD = 12;
234+ /**
235+ * Useful constant for WEEK_OF_MONTH field alignment.
236+ * Used in FieldPosition of date/time formatting.
237+ */
238+ public final static int WEEK_OF_MONTH_FIELD = 13;
239+ /**
240+ * Useful constant for AM_PM field alignment.
241+ * Used in FieldPosition of date/time formatting.
242+ */
243+ public final static int AM_PM_FIELD = 14;
244+ /**
245+ * Useful constant for one-based HOUR field alignment.
246+ * Used in FieldPosition of date/time formatting.
247+ * HOUR1_FIELD is used for the one-based 12-hour clock.
248+ * For example, 11:30 PM + 1 hour results in 12:30 AM.
249+ */
250+ public final static int HOUR1_FIELD = 15;
251+ /**
252+ * Useful constant for zero-based HOUR field alignment.
253+ * Used in FieldPosition of date/time formatting.
254+ * HOUR0_FIELD is used for the zero-based 12-hour clock.
255+ * For example, 11:30 PM + 1 hour results in 00:30 AM.
256+ */
257+ public final static int HOUR0_FIELD = 16;
258+ /**
259+ * Useful constant for TIMEZONE field alignment.
260+ * Used in FieldPosition of date/time formatting.
261+ */
262+ public final static int TIMEZONE_FIELD = 17;
263+
264+ // Proclaim serial compatibility with 1.1 FCS
265+ private static final long serialVersionUID = 7218322306649953788L;
266+
267+ /**
268+ * Overrides Format.
269+ * Formats a time object into a time string. Examples of time objects
270+ * are a time value expressed in milliseconds and a Date object.
271+ * @param obj must be a Number or a Date.
272+ * @param toAppendTo the string buffer for the returning time string.
273+ * @return the string buffer passed in as toAppendTo, with formatted text appended.
274+ * @param fieldPosition keeps track of the position of the field
275+ * within the returned string.
276+ * On input: an alignment field,
277+ * if desired. On output: the offsets of the alignment field. For
278+ * example, given a time text "1996.07.10 AD at 15:08:56 PDT",
279+ * if the given fieldPosition is DateFormat.YEAR_FIELD, the
280+ * begin index and end index of fieldPosition will be set to
281+ * 0 and 4, respectively.
282+ * Notice that if the same time field appears
283+ * more than once in a pattern, the fieldPosition will be set for the first
284+ * occurrence of that time field. For instance, formatting a Date to
285+ * the time string "1 PM PDT (Pacific Daylight Time)" using the pattern
286+ * "h a z (zzzz)" and the alignment field DateFormat.TIMEZONE_FIELD,
287+ * the begin index and end index of fieldPosition will be set to
288+ * 5 and 8, respectively, for the first occurrence of the timezone
289+ * pattern character 'z'.
290+ * @see java.text.Format
291+ */
292+ public final StringBuffer format(Object obj, StringBuffer toAppendTo,
293+ FieldPosition fieldPosition)
294+ {
295+ if (obj instanceof Date)
296+ return format( (Date)obj, toAppendTo, fieldPosition );
297+ else if (obj instanceof Number)
298+ return format( new Date(((Number)obj).longValue()),
299+ toAppendTo, fieldPosition );
300+ else
301+ throw new IllegalArgumentException("Cannot format given Object as a Date");
302+ }
303+
304+ /**
305+ * Formats a Date into a date/time string.
306+ * @param date a Date to be formatted into a date/time string.
307+ * @param toAppendTo the string buffer for the returning date/time string.
308+ * @param fieldPosition keeps track of the position of the field
309+ * within the returned string.
310+ * On input: an alignment field,
311+ * if desired. On output: the offsets of the alignment field. For
312+ * example, given a time text "1996.07.10 AD at 15:08:56 PDT",
313+ * if the given fieldPosition is DateFormat.YEAR_FIELD, the
314+ * begin index and end index of fieldPosition will be set to
315+ * 0 and 4, respectively.
316+ * Notice that if the same time field appears
317+ * more than once in a pattern, the fieldPosition will be set for the first
318+ * occurrence of that time field. For instance, formatting a Date to
319+ * the time string "1 PM PDT (Pacific Daylight Time)" using the pattern
320+ * "h a z (zzzz)" and the alignment field DateFormat.TIMEZONE_FIELD,
321+ * the begin index and end index of fieldPosition will be set to
322+ * 5 and 8, respectively, for the first occurrence of the timezone
323+ * pattern character 'z'.
324+ * @return the string buffer passed in as toAppendTo, with formatted text appended.
325+ */
326+ public abstract StringBuffer format(Date date, StringBuffer toAppendTo,
327+ FieldPosition fieldPosition);
328+
329+ /**
330+ * Formats a Date into a date/time string.
331+ * @param date the time value to be formatted into a time string.
332+ * @return the formatted time string.
333+ */
334+ public final String format(Date date)
335+ {
336+ return format(date, new StringBuffer(),
337+ DontCareFieldPosition.INSTANCE).toString();
338+ }
339+
340+ /**
341+ * Parses text from the beginning of the given string to produce a date.
342+ * The method may not use the entire text of the given string.
343+ * <p>
344+ * See the {@link #parse(String, ParsePosition)} method for more information
345+ * on date parsing.
346+ *
347+ * @param source A <code>String</code> whose beginning should be parsed.
348+ * @return A <code>Date</code> parsed from the string.
349+ * @exception ParseException if the beginning of the specified string
350+ * cannot be parsed.
351+ */
352+ public Date parse(String source) throws ParseException
353+ {
354+ ParsePosition pos = new ParsePosition(0);
355+ Date result = parse(source, pos);
356+ if (pos.index == 0)
357+ throw new ParseException("Unparseable date: \"" + source + "\"" ,
358+ pos.errorIndex);
359+ return result;
360+ }
361+
362+ /**
363+ * Parse a date/time string according to the given parse position. For
364+ * example, a time text {@code "07/10/96 4:5 PM, PDT"} will be parsed into a {@code Date}
365+ * that is equivalent to {@code Date(837039900000L)}.
366+ *
367+ * <p> By default, parsing is lenient: If the input is not in the form used
368+ * by this object's format method but can still be parsed as a date, then
369+ * the parse succeeds. Clients may insist on strict adherence to the
370+ * format by calling {@link #setLenient(boolean) setLenient(false)}.
371+ *
372+ * <p>This parsing operation uses the {@link #calendar} to produce
373+ * a {@code Date}. As a result, the {@code calendar}'s date-time
374+ * fields and the {@code TimeZone} value may have been
375+ * overwritten, depending on subclass implementations. Any {@code
376+ * TimeZone} value that has previously been set by a call to
377+ * {@link #setTimeZone(java.util.TimeZone) setTimeZone} may need
378+ * to be restored for further operations.
379+ *
380+ * @param source The date/time string to be parsed
381+ *
382+ * @param pos On input, the position at which to start parsing; on
383+ * output, the position at which parsing terminated, or the
384+ * start position if the parse failed.
385+ *
386+ * @return A {@code Date}, or {@code null} if the input could not be parsed
387+ */
388+ public abstract Date parse(String source, ParsePosition pos);
389+
390+ /**
391+ * Parses text from a string to produce a <code>Date</code>.
392+ * <p>
393+ * The method attempts to parse text starting at the index given by
394+ * <code>pos</code>.
395+ * If parsing succeeds, then the index of <code>pos</code> is updated
396+ * to the index after the last character used (parsing does not necessarily
397+ * use all characters up to the end of the string), and the parsed
398+ * date is returned. The updated <code>pos</code> can be used to
399+ * indicate the starting point for the next call to this method.
400+ * If an error occurs, then the index of <code>pos</code> is not
401+ * changed, the error index of <code>pos</code> is set to the index of
402+ * the character where the error occurred, and null is returned.
403+ * <p>
404+ * See the {@link #parse(String, ParsePosition)} method for more information
405+ * on date parsing.
406+ *
407+ * @param source A <code>String</code>, part of which should be parsed.
408+ * @param pos A <code>ParsePosition</code> object with index and error
409+ * index information as described above.
410+ * @return A <code>Date</code> parsed from the string. In case of
411+ * error, returns null.
412+ * @exception NullPointerException if <code>pos</code> is null.
413+ */
414+ public Object parseObject(String source, ParsePosition pos) {
415+ return parse(source, pos);
416+ }
417+
418+ /**
419+ * Constant for full style pattern.
420+ */
421+ public static final int FULL = 0;
422+ /**
423+ * Constant for long style pattern.
424+ */
425+ public static final int LONG = 1;
426+ /**
427+ * Constant for medium style pattern.
428+ */
429+ public static final int MEDIUM = 2;
430+ /**
431+ * Constant for short style pattern.
432+ */
433+ public static final int SHORT = 3;
434+ /**
435+ * Constant for default style pattern. Its value is MEDIUM.
436+ */
437+ public static final int DEFAULT = MEDIUM;
438+
439+ /**
440+ * Gets the time formatter with the default formatting style
441+ * for the default locale.
442+ * @return a time formatter.
443+ */
444+ public final static DateFormat getTimeInstance()
445+ {
446+ return get(DEFAULT, 0, 1, Locale.getDefault(Locale.Category.FORMAT));
447+ }
448+
449+ /**
450+ * Gets the time formatter with the given formatting style
451+ * for the default locale.
452+ * @param style the given formatting style. For example,
453+ * SHORT for "h:mm a" in the US locale.
454+ * @return a time formatter.
455+ */
456+ public final static DateFormat getTimeInstance(int style)
457+ {
458+ return get(style, 0, 1, Locale.getDefault(Locale.Category.FORMAT));
459+ }
460+
461+ /**
462+ * Gets the time formatter with the given formatting style
463+ * for the given locale.
464+ * @param style the given formatting style. For example,
465+ * SHORT for "h:mm a" in the US locale.
466+ * @param aLocale the given locale.
467+ * @return a time formatter.
468+ */
469+ public final static DateFormat getTimeInstance(int style,
470+ Locale aLocale)
471+ {
472+ return get(style, 0, 1, aLocale);
473+ }
474+
475+ /**
476+ * Gets the date formatter with the default formatting style
477+ * for the default locale.
478+ * @return a date formatter.
479+ */
480+ public final static DateFormat getDateInstance()
481+ {
482+ return get(0, DEFAULT, 2, Locale.getDefault(Locale.Category.FORMAT));
483+ }
484+
485+ /**
486+ * Gets the date formatter with the given formatting style
487+ * for the default locale.
488+ * @param style the given formatting style. For example,
489+ * SHORT for "M/d/yy" in the US locale.
490+ * @return a date formatter.
491+ */
492+ public final static DateFormat getDateInstance(int style)
493+ {
494+ return get(0, style, 2, Locale.getDefault(Locale.Category.FORMAT));
495+ }
496+
497+ /**
498+ * Gets the date formatter with the given formatting style
499+ * for the given locale.
500+ * @param style the given formatting style. For example,
501+ * SHORT for "M/d/yy" in the US locale.
502+ * @param aLocale the given locale.
503+ * @return a date formatter.
504+ */
505+ public final static DateFormat getDateInstance(int style,
506+ Locale aLocale)
507+ {
508+ return get(0, style, 2, aLocale);
509+ }
510+
511+ /**
512+ * Gets the date/time formatter with the default formatting style
513+ * for the default locale.
514+ * @return a date/time formatter.
515+ */
516+ public final static DateFormat getDateTimeInstance()
517+ {
518+ return get(DEFAULT, DEFAULT, 3, Locale.getDefault(Locale.Category.FORMAT));
519+ }
520+
521+ /**
522+ * Gets the date/time formatter with the given date and time
523+ * formatting styles for the default locale.
524+ * @param dateStyle the given date formatting style. For example,
525+ * SHORT for "M/d/yy" in the US locale.
526+ * @param timeStyle the given time formatting style. For example,
527+ * SHORT for "h:mm a" in the US locale.
528+ * @return a date/time formatter.
529+ */
530+ public final static DateFormat getDateTimeInstance(int dateStyle,
531+ int timeStyle)
532+ {
533+ return get(timeStyle, dateStyle, 3, Locale.getDefault(Locale.Category.FORMAT));
534+ }
535+
536+ /**
537+ * Gets the date/time formatter with the given formatting styles
538+ * for the given locale.
539+ * @param dateStyle the given date formatting style.
540+ * @param timeStyle the given time formatting style.
541+ * @param aLocale the given locale.
542+ * @return a date/time formatter.
543+ */
544+ public final static DateFormat
545+ getDateTimeInstance(int dateStyle, int timeStyle, Locale aLocale)
546+ {
547+ return get(timeStyle, dateStyle, 3, aLocale);
548+ }
549+
550+ /**
551+ * Get a default date/time formatter that uses the SHORT style for both the
552+ * date and the time.
553+ */
554+ public final static DateFormat getInstance() {
555+ return getDateTimeInstance(SHORT, SHORT);
556+ }
557+
558+ /**
559+ * Returns an array of all locales for which the
560+ * <code>get*Instance</code> methods of this class can return
561+ * localized instances.
562+ * The returned array represents the union of locales supported by the Java
563+ * runtime and by installed
564+ * {@link java.text.spi.DateFormatProvider DateFormatProvider} implementations.
565+ * It must contain at least a <code>Locale</code> instance equal to
566+ * {@link java.util.Locale#US Locale.US}.
567+ *
568+ * @return An array of locales for which localized
569+ * <code>DateFormat</code> instances are available.
570+ */
571+ public static Locale[] getAvailableLocales()
572+ {
573+ LocaleServiceProviderPool pool =
574+ LocaleServiceProviderPool.getPool(DateFormatProvider.class);
575+ return pool.getAvailableLocales();
576+ }
577+
578+ /**
579+ * Set the calendar to be used by this date format. Initially, the default
580+ * calendar for the specified or default locale is used.
581+ *
582+ * <p>Any {@link java.util.TimeZone TimeZone} and {@linkplain
583+ * #isLenient() leniency} values that have previously been set are
584+ * overwritten by {@code newCalendar}'s values.
585+ *
586+ * @param newCalendar the new {@code Calendar} to be used by the date format
587+ */
588+ public void setCalendar(Calendar newCalendar)
589+ {
590+ this.calendar = newCalendar;
591+ }
592+
593+ /**
594+ * Gets the calendar associated with this date/time formatter.
595+ *
596+ * @return the calendar associated with this date/time formatter.
597+ */
598+ public Calendar getCalendar()
599+ {
600+ return calendar;
601+ }
602+
603+ /**
604+ * Allows you to set the number formatter.
605+ * @param newNumberFormat the given new NumberFormat.
606+ */
607+ public void setNumberFormat(NumberFormat newNumberFormat)
608+ {
609+ this.numberFormat = newNumberFormat;
610+ }
611+
612+ /**
613+ * Gets the number formatter which this date/time formatter uses to
614+ * format and parse a time.
615+ * @return the number formatter which this date/time formatter uses.
616+ */
617+ public NumberFormat getNumberFormat()
618+ {
619+ return numberFormat;
620+ }
621+
622+ /**
623+ * Sets the time zone for the calendar of this {@code DateFormat} object.
624+ * This method is equivalent to the following call.
625+ * <blockquote><pre>
626+ * getCalendar().setTimeZone(zone)
627+ * </pre></blockquote>
628+ *
629+ * <p>The {@code TimeZone} set by this method is overwritten by a
630+ * {@link #setCalendar(java.util.Calendar) setCalendar} call.
631+ *
632+ * <p>The {@code TimeZone} set by this method may be overwritten as
633+ * a result of a call to the parse method.
634+ *
635+ * @param zone the given new time zone.
636+ */
637+ public void setTimeZone(TimeZone zone)
638+ {
639+ calendar.setTimeZone(zone);
640+ }
641+
642+ /**
643+ * Gets the time zone.
644+ * This method is equivalent to the following call.
645+ * <blockquote><pre>
646+ * getCalendar().getTimeZone()
647+ * </pre></blockquote>
648+ *
649+ * @return the time zone associated with the calendar of DateFormat.
650+ */
651+ public TimeZone getTimeZone()
652+ {
653+ return calendar.getTimeZone();
654+ }
655+
656+ /**
657+ * Specify whether or not date/time parsing is to be lenient. With
658+ * lenient parsing, the parser may use heuristics to interpret inputs that
659+ * do not precisely match this object's format. With strict parsing,
660+ * inputs must match this object's format.
661+ *
662+ * <p>This method is equivalent to the following call.
663+ * <blockquote><pre>
664+ * getCalendar().setLenient(lenient)
665+ * </pre></blockquote>
666+ *
667+ * <p>This leniency value is overwritten by a call to {@link
668+ * #setCalendar(java.util.Calendar) setCalendar()}.
669+ *
670+ * @param lenient when {@code true}, parsing is lenient
671+ * @see java.util.Calendar#setLenient(boolean)
672+ */
673+ public void setLenient(boolean lenient)
674+ {
675+ calendar.setLenient(lenient);
676+ }
677+
678+ /**
679+ * Tell whether date/time parsing is to be lenient.
680+ * This method is equivalent to the following call.
681+ * <blockquote><pre>
682+ * getCalendar().isLenient()
683+ * </pre></blockquote>
684+ *
685+ * @return {@code true} if the {@link #calendar} is lenient;
686+ * {@code false} otherwise.
687+ * @see java.util.Calendar#isLenient()
688+ */
689+ public boolean isLenient()
690+ {
691+ return calendar.isLenient();
692+ }
693+
694+ /**
695+ * Overrides hashCode
696+ */
697+ public int hashCode() {
698+ return numberFormat.hashCode();
699+ // just enough fields for a reasonable distribution
700+ }
701+
702+ /**
703+ * Overrides equals
704+ */
705+ public boolean equals(Object obj) {
706+ if (this == obj) return true;
707+ if (obj == null || getClass() != obj.getClass()) return false;
708+ DateFormat other = (DateFormat) obj;
709+ return (// calendar.equivalentTo(other.calendar) // THIS API DOESN'T EXIST YET!
710+ calendar.getFirstDayOfWeek() == other.calendar.getFirstDayOfWeek() &&
711+ calendar.getMinimalDaysInFirstWeek() == other.calendar.getMinimalDaysInFirstWeek() &&
712+ calendar.isLenient() == other.calendar.isLenient() &&
713+ calendar.getTimeZone().equals(other.calendar.getTimeZone()) &&
714+ numberFormat.equals(other.numberFormat));
715+ }
716+
717+ /**
718+ * Overrides Cloneable
719+ */
720+ public Object clone()
721+ {
722+ DateFormat other = (DateFormat) super.clone();
723+ other.calendar = (Calendar) calendar.clone();
724+ other.numberFormat = (NumberFormat) numberFormat.clone();
725+ return other;
726+ }
727+
728+ /**
729+ * Creates a DateFormat with the given time and/or date style in the given
730+ * locale.
731+ * @param timeStyle a value from 0 to 3 indicating the time format,
732+ * ignored if flags is 2
733+ * @param dateStyle a value from 0 to 3 indicating the time format,
734+ * ignored if flags is 1
735+ * @param flags either 1 for a time format, 2 for a date format,
736+ * or 3 for a date/time format
737+ * @param loc the locale for the format
738+ */
739+ private static DateFormat get(int timeStyle, int dateStyle,
740+ int flags, Locale loc) {
741+ if ((flags & 1) != 0) {
742+ if (timeStyle < 0 || timeStyle > 3) {
743+ throw new IllegalArgumentException("Illegal time style " + timeStyle);
744+ }
745+ } else {
746+ timeStyle = -1;
747+ }
748+ if ((flags & 2) != 0) {
749+ if (dateStyle < 0 || dateStyle > 3) {
750+ throw new IllegalArgumentException("Illegal date style " + dateStyle);
751+ }
752+ } else {
753+ dateStyle = -1;
754+ }
755+ try {
756+ // Check whether a provider can provide an implementation that's closer
757+ // to the requested locale than what the Java runtime itself can provide.
758+ LocaleServiceProviderPool pool =
759+ LocaleServiceProviderPool.getPool(DateFormatProvider.class);
760+ if (pool.hasProviders()) {
761+ DateFormat providersInstance = pool.getLocalizedObject(
762+ DateFormatGetter.INSTANCE,
763+ loc,
764+ timeStyle,
765+ dateStyle,
766+ flags);
767+ if (providersInstance != null) {
768+ return providersInstance;
769+ }
770+ }
771+
772+ return new SimpleDateFormat(timeStyle, dateStyle, loc);
773+ } catch (MissingResourceException e) {
774+ return new SimpleDateFormat("M/d/yy h:mm a");
775+ }
776+ }
777+
778+ /**
779+ * Create a new date format.
780+ */
781+ protected DateFormat() {}
782+
783+ /**
784+ * Defines constants that are used as attribute keys in the
785+ * <code>AttributedCharacterIterator</code> returned
786+ * from <code>DateFormat.formatToCharacterIterator</code> and as
787+ * field identifiers in <code>FieldPosition</code>.
788+ * <p>
789+ * The class also provides two methods to map
790+ * between its constants and the corresponding Calendar constants.
791+ *
792+ * @since 1.4
793+ * @see java.util.Calendar
794+ */
795+ public static class Field extends Format.Field {
796+
797+ // Proclaim serial compatibility with 1.4 FCS
798+ private static final long serialVersionUID = 7441350119349544720L;
799+
800+ // table of all instances in this class, used by readResolve
801+ private static final Map instanceMap = new HashMap(18);
802+ // Maps from Calendar constant (such as Calendar.ERA) to Field
803+ // constant (such as Field.ERA).
804+ private static final Field[] calendarToFieldMapping =
805+ new Field[Calendar.FIELD_COUNT];
806+
807+ /** Calendar field. */
808+ private int calendarField;
809+
810+ /**
811+ * Returns the <code>Field</code> constant that corresponds to
812+ * the <code>Calendar</code> constant <code>calendarField</code>.
813+ * If there is no direct mapping between the <code>Calendar</code>
814+ * constant and a <code>Field</code>, null is returned.
815+ *
816+ * @throws IllegalArgumentException if <code>calendarField</code> is
817+ * not the value of a <code>Calendar</code> field constant.
818+ * @param calendarField Calendar field constant
819+ * @return Field instance representing calendarField.
820+ * @see java.util.Calendar
821+ */
822+ public static Field ofCalendarField(int calendarField) {
823+ if (calendarField < 0 || calendarField >=
824+ calendarToFieldMapping.length) {
825+ throw new IllegalArgumentException("Unknown Calendar constant "
826+ + calendarField);
827+ }
828+ return calendarToFieldMapping[calendarField];
829+ }
830+
831+ /**
832+ * Creates a <code>Field</code>.
833+ *
834+ * @param name the name of the <code>Field</code>
835+ * @param calendarField the <code>Calendar</code> constant this
836+ * <code>Field</code> corresponds to; any value, even one
837+ * outside the range of legal <code>Calendar</code> values may
838+ * be used, but <code>-1</code> should be used for values
839+ * that don't correspond to legal <code>Calendar</code> values
840+ */
841+ protected Field(String name, int calendarField) {
842+ super(name);
843+ this.calendarField = calendarField;
844+ if (this.getClass() == DateFormat.Field.class) {
845+ instanceMap.put(name, this);
846+ if (calendarField >= 0) {
847+ // assert(calendarField < Calendar.FIELD_COUNT);
848+ calendarToFieldMapping[calendarField] = this;
849+ }
850+ }
851+ }
852+
853+ /**
854+ * Returns the <code>Calendar</code> field associated with this
855+ * attribute. For example, if this represents the hours field of
856+ * a <code>Calendar</code>, this would return
857+ * <code>Calendar.HOUR</code>. If there is no corresponding
858+ * <code>Calendar</code> constant, this will return -1.
859+ *
860+ * @return Calendar constant for this field
861+ * @see java.util.Calendar
862+ */
863+ public int getCalendarField() {
864+ return calendarField;
865+ }
866+
867+ /**
868+ * Resolves instances being deserialized to the predefined constants.
869+ *
870+ * @throws InvalidObjectException if the constant could not be
871+ * resolved.
872+ * @return resolved DateFormat.Field constant
873+ */
874+ protected Object readResolve() throws InvalidObjectException {
875+ if (this.getClass() != DateFormat.Field.class) {
876+ throw new InvalidObjectException("subclass didn't correctly implement readResolve");
877+ }
878+
879+ Object instance = instanceMap.get(getName());
880+ if (instance != null) {
881+ return instance;
882+ } else {
883+ throw new InvalidObjectException("unknown attribute name");
884+ }
885+ }
886+
887+ //
888+ // The constants
889+ //
890+
891+ /**
892+ * Constant identifying the era field.
893+ */
894+ public final static Field ERA = new Field("era", Calendar.ERA);
895+
896+ /**
897+ * Constant identifying the year field.
898+ */
899+ public final static Field YEAR = new Field("year", Calendar.YEAR);
900+
901+ /**
902+ * Constant identifying the month field.
903+ */
904+ public final static Field MONTH = new Field("month", Calendar.MONTH);
905+
906+ /**
907+ * Constant identifying the day of month field.
908+ */
909+ public final static Field DAY_OF_MONTH = new
910+ Field("day of month", Calendar.DAY_OF_MONTH);
911+
912+ /**
913+ * Constant identifying the hour of day field, where the legal values
914+ * are 1 to 24.
915+ */
916+ public final static Field HOUR_OF_DAY1 = new Field("hour of day 1",-1);
917+
918+ /**
919+ * Constant identifying the hour of day field, where the legal values
920+ * are 0 to 23.
921+ */
922+ public final static Field HOUR_OF_DAY0 = new
923+ Field("hour of day", Calendar.HOUR_OF_DAY);
924+
925+ /**
926+ * Constant identifying the minute field.
927+ */
928+ public final static Field MINUTE =new Field("minute", Calendar.MINUTE);
929+
930+ /**
931+ * Constant identifying the second field.
932+ */
933+ public final static Field SECOND =new Field("second", Calendar.SECOND);
934+
935+ /**
936+ * Constant identifying the millisecond field.
937+ */
938+ public final static Field MILLISECOND = new
939+ Field("millisecond", Calendar.MILLISECOND);
940+
941+ /**
942+ * Constant identifying the day of week field.
943+ */
944+ public final static Field DAY_OF_WEEK = new
945+ Field("day of week", Calendar.DAY_OF_WEEK);
946+
947+ /**
948+ * Constant identifying the day of year field.
949+ */
950+ public final static Field DAY_OF_YEAR = new
951+ Field("day of year", Calendar.DAY_OF_YEAR);
952+
953+ /**
954+ * Constant identifying the day of week field.
955+ */
956+ public final static Field DAY_OF_WEEK_IN_MONTH =
957+ new Field("day of week in month",
958+ Calendar.DAY_OF_WEEK_IN_MONTH);
959+
960+ /**
961+ * Constant identifying the week of year field.
962+ */
963+ public final static Field WEEK_OF_YEAR = new
964+ Field("week of year", Calendar.WEEK_OF_YEAR);
965+
966+ /**
967+ * Constant identifying the week of month field.
968+ */
969+ public final static Field WEEK_OF_MONTH = new
970+ Field("week of month", Calendar.WEEK_OF_MONTH);
971+
972+ /**
973+ * Constant identifying the time of day indicator
974+ * (e.g. "a.m." or "p.m.") field.
975+ */
976+ public final static Field AM_PM = new
977+ Field("am pm", Calendar.AM_PM);
978+
979+ /**
980+ * Constant identifying the hour field, where the legal values are
981+ * 1 to 12.
982+ */
983+ public final static Field HOUR1 = new Field("hour 1", -1);
984+
985+ /**
986+ * Constant identifying the hour field, where the legal values are
987+ * 0 to 11.
988+ */
989+ public final static Field HOUR0 = new
990+ Field("hour", Calendar.HOUR);
991+
992+ /**
993+ * Constant identifying the time zone field.
994+ */
995+ public final static Field TIME_ZONE = new Field("time zone", -1);
996+ }
997+
998+ /**
999+ * Obtains a DateFormat instance from a DateFormatProvider
1000+ * implementation.
1001+ */
1002+ private static class DateFormatGetter
1003+ implements LocaleServiceProviderPool.LocalizedObjectGetter<DateFormatProvider, DateFormat> {
1004+ private static final DateFormatGetter INSTANCE = new DateFormatGetter();
1005+
1006+ public DateFormat getObject(DateFormatProvider dateFormatProvider,
1007+ Locale locale,
1008+ String key,
1009+ Object... params) {
1010+ assert params.length == 3;
1011+
1012+ int timeStyle = (Integer)params[0];
1013+ int dateStyle = (Integer)params[1];
1014+ int flags = (Integer)params[2];
1015+
1016+ switch (flags) {
1017+ case 1:
1018+ return dateFormatProvider.getTimeInstance(timeStyle, locale);
1019+ case 2:
1020+ return dateFormatProvider.getDateInstance(dateStyle, locale);
1021+ case 3:
1022+ return dateFormatProvider.getDateTimeInstance(dateStyle, timeStyle, locale);
1023+ default:
1024+ assert false : "should not happen";
1025+ }
1026+
1027+ return null;
1028+ }
1029+ }
1030+}