/*
* Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*/
/*
* (C) Copyright Taligent, Inc. 1996 - All Rights Reserved
* (C) Copyright IBM Corp. 1996-1998 - All Rights Reserved
*
* The original version of this source code and documentation is copyrighted
* and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These
* materials are provided under terms of a License Agreement between Taligent
* and Sun. This technology is protected by multiple US and International
* patents. This notice and attribution to Taligent may not be removed.
* Taligent is a registered trademark of Taligent, Inc.
*
*/
package java.text;
import java.io.
IOException;
import java.io.
InvalidObjectException;
import java.io.
ObjectInputStream;
import static java.text.
DateFormatSymbols.*;
import java.util.
Calendar;
import java.util.
Date;
import java.util.
GregorianCalendar;
import java.util.
Locale;
import java.util.
Map;
import java.util.
SimpleTimeZone;
import java.util.
SortedMap;
import java.util.
TimeZone;
import java.util.concurrent.
ConcurrentHashMap;
import java.util.concurrent.
ConcurrentMap;
import sun.util.calendar.
CalendarUtils;
import sun.util.calendar.
ZoneInfoFile;
import sun.util.locale.provider.
LocaleProviderAdapter;
/**
* <code>SimpleDateFormat</code> is a concrete class for formatting and
* parsing dates in a locale-sensitive manner. It allows for formatting
* (date → text), parsing (text → date), and normalization.
*
* <p>
* <code>SimpleDateFormat</code> allows you to start by choosing
* any user-defined patterns for date-time formatting. However, you
* are encouraged to create a date-time formatter with either
* <code>getTimeInstance</code>, <code>getDateInstance</code>, or
* <code>getDateTimeInstance</code> in <code>DateFormat</code>. Each
* of these class methods can return a date/time formatter initialized
* with a default format pattern. You may modify the format pattern
* using the <code>applyPattern</code> methods as desired.
* For more information on using these methods, see
* {@link DateFormat}.
*
* <h3>Date and Time Patterns</h3>
* <p>
* Date and time formats are specified by <em>date and time pattern</em>
* strings.
* Within date and time pattern strings, unquoted letters from
* <code>'A'</code> to <code>'Z'</code> and from <code>'a'</code> to
* <code>'z'</code> are interpreted as pattern letters representing the
* components of a date or time string.
* Text can be quoted using single quotes (<code>'</code>) to avoid
* interpretation.
* <code>"''"</code> represents a single quote.
* All other characters are not interpreted; they're simply copied into the
* output string during formatting or matched against the input string
* during parsing.
* <p>
* The following pattern letters are defined (all other characters from
* <code>'A'</code> to <code>'Z'</code> and from <code>'a'</code> to
* <code>'z'</code> are reserved):
* <blockquote>
* <table border=0 cellspacing=3 cellpadding=0 summary="Chart shows pattern letters, date/time component, presentation, and examples.">
* <tr style="background-color: rgb(204, 204, 255);">
* <th align=left>Letter
* <th align=left>Date or Time Component
* <th align=left>Presentation
* <th align=left>Examples
* <tr>
* <td><code>G</code>
* <td>Era designator
* <td><a href="#text">Text</a>
* <td><code>AD</code>
* <tr style="background-color: rgb(238, 238, 255);">
* <td><code>y</code>
* <td>Year
* <td><a href="#year">Year</a>
* <td><code>1996</code>; <code>96</code>
* <tr>
* <td><code>Y</code>
* <td>Week year
* <td><a href="#year">Year</a>
* <td><code>2009</code>; <code>09</code>
* <tr style="background-color: rgb(238, 238, 255);">
* <td><code>M</code>
* <td>Month in year (context sensitive)
* <td><a href="#month">Month</a>
* <td><code>July</code>; <code>Jul</code>; <code>07</code>
* <tr>
* <td><code>L</code>
* <td>Month in year (standalone form)
* <td><a href="#month">Month</a>
* <td><code>July</code>; <code>Jul</code>; <code>07</code>
* <tr style="background-color: rgb(238, 238, 255);">
* <td><code>w</code>
* <td>Week in year
* <td><a href="#number">Number</a>
* <td><code>27</code>
* <tr>
* <td><code>W</code>
* <td>Week in month
* <td><a href="#number">Number</a>
* <td><code>2</code>
* <tr style="background-color: rgb(238, 238, 255);">
* <td><code>D</code>
* <td>Day in year
* <td><a href="#number">Number</a>
* <td><code>189</code>
* <tr>
* <td><code>d</code>
* <td>Day in month
* <td><a href="#number">Number</a>
* <td><code>10</code>
* <tr style="background-color: rgb(238, 238, 255);">
* <td><code>F</code>
* <td>Day of week in month
* <td><a href="#number">Number</a>
* <td><code>2</code>
* <tr>
* <td><code>E</code>
* <td>Day name in week
* <td><a href="#text">Text</a>
* <td><code>Tuesday</code>; <code>Tue</code>
* <tr style="background-color: rgb(238, 238, 255);">
* <td><code>u</code>
* <td>Day number of week (1 = Monday, ..., 7 = Sunday)
* <td><a href="#number">Number</a>
* <td><code>1</code>
* <tr>
* <td><code>a</code>
* <td>Am/pm marker
* <td><a href="#text">Text</a>
* <td><code>PM</code>
* <tr style="background-color: rgb(238, 238, 255);">
* <td><code>H</code>
* <td>Hour in day (0-23)
* <td><a href="#number">Number</a>
* <td><code>0</code>
* <tr>
* <td><code>k</code>
* <td>Hour in day (1-24)
* <td><a href="#number">Number</a>
* <td><code>24</code>
* <tr style="background-color: rgb(238, 238, 255);">
* <td><code>K</code>
* <td>Hour in am/pm (0-11)
* <td><a href="#number">Number</a>
* <td><code>0</code>
* <tr>
* <td><code>h</code>
* <td>Hour in am/pm (1-12)
* <td><a href="#number">Number</a>
* <td><code>12</code>
* <tr style="background-color: rgb(238, 238, 255);">
* <td><code>m</code>
* <td>Minute in hour
* <td><a href="#number">Number</a>
* <td><code>30</code>
* <tr>
* <td><code>s</code>
* <td>Second in minute
* <td><a href="#number">Number</a>
* <td><code>55</code>
* <tr style="background-color: rgb(238, 238, 255);">
* <td><code>S</code>
* <td>Millisecond
* <td><a href="#number">Number</a>
* <td><code>978</code>
* <tr>
* <td><code>z</code>
* <td>Time zone
* <td><a href="#timezone">General time zone</a>
* <td><code>Pacific Standard Time</code>; <code>PST</code>; <code>GMT-08:00</code>
* <tr style="background-color: rgb(238, 238, 255);">
* <td><code>Z</code>
* <td>Time zone
* <td><a href="#rfc822timezone">RFC 822 time zone</a>
* <td><code>-0800</code>
* <tr>
* <td><code>X</code>
* <td>Time zone
* <td><a href="#iso8601timezone">ISO 8601 time zone</a>
* <td><code>-08</code>; <code>-0800</code>; <code>-08:00</code>
* </table>
* </blockquote>
* Pattern letters are usually repeated, as their number determines the
* exact presentation:
* <ul>
* <li><strong><a name="text">Text:</a></strong>
* For formatting, if the number of pattern letters is 4 or more,
* the full form is used; otherwise a short or abbreviated form
* is used if available.
* For parsing, both forms are accepted, independent of the number
* of pattern letters.<br><br></li>
* <li><strong><a name="number">Number:</a></strong>
* For formatting, the number of pattern letters is the minimum
* number of digits, and shorter numbers are zero-padded to this amount.
* For parsing, the number of pattern letters is ignored unless
* it's needed to separate two adjacent fields.<br><br></li>
* <li><strong><a name="year">Year:</a></strong>
* If the formatter's {@link #getCalendar() Calendar} is the Gregorian
* calendar, the following rules are applied.<br>
* <ul>
* <li>For formatting, if the number of pattern letters is 2, the year
* is truncated to 2 digits; otherwise it is interpreted as a
* <a href="#number">number</a>.
* <li>For parsing, if the number of pattern letters is more than 2,
* the year is interpreted literally, regardless of the number of
* digits. So using the pattern "MM/dd/yyyy", "01/11/12" parses to
* Jan 11, 12 A.D.
* <li>For parsing with the abbreviated year pattern ("y" or "yy"),
* <code>SimpleDateFormat</code> must interpret the abbreviated year
* relative to some century. It does this by adjusting dates to be
* within 80 years before and 20 years after the time the <code>SimpleDateFormat</code>
* instance is created. For example, using a pattern of "MM/dd/yy" and a
* <code>SimpleDateFormat</code> instance created on Jan 1, 1997, the string
* "01/11/12" would be interpreted as Jan 11, 2012 while the string "05/04/64"
* would be interpreted as May 4, 1964.
* During parsing, only strings consisting of exactly two digits, as defined by
* {@link Character#isDigit(char)}, will be parsed into the default century.
* Any other numeric string, such as a one digit string, a three or more digit
* string, or a two digit string that isn't all digits (for example, "-1"), is
* interpreted literally. So "01/02/3" or "01/02/003" are parsed, using the
* same pattern, as Jan 2, 3 AD. Likewise, "01/02/-3" is parsed as Jan 2, 4 BC.
* </ul>
* Otherwise, calendar system specific forms are applied.
* For both formatting and parsing, if the number of pattern
* letters is 4 or more, a calendar specific {@linkplain
* Calendar#LONG long form} is used. Otherwise, a calendar
* specific {@linkplain Calendar#SHORT short or abbreviated form}
* is used.<br>
* <br>
* If week year {@code 'Y'} is specified and the {@linkplain
* #getCalendar() calendar} doesn't support any <a
* href="../util/GregorianCalendar.html#week_year"> week
* years</a>, the calendar year ({@code 'y'}) is used instead. The
* support of week years can be tested with a call to {@link
* DateFormat#getCalendar() getCalendar()}.{@link
* java.util.Calendar#isWeekDateSupported()
* isWeekDateSupported()}.<br><br></li>
* <li><strong><a name="month">Month:</a></strong>
* If the number of pattern letters is 3 or more, the month is
* interpreted as <a href="#text">text</a>; otherwise,
* it is interpreted as a <a href="#number">number</a>.<br>
* <ul>
* <li>Letter <em>M</em> produces context-sensitive month names, such as the
* embedded form of names. If a {@code DateFormatSymbols} has been set
* explicitly with constructor {@link #SimpleDateFormat(String,
* DateFormatSymbols)} or method {@link
* #setDateFormatSymbols(DateFormatSymbols)}, the month names given by
* the {@code DateFormatSymbols} are used.</li>
* <li>Letter <em>L</em> produces the standalone form of month names.</li>
* </ul>
* <br></li>
* <li><strong><a name="timezone">General time zone:</a></strong>
* Time zones are interpreted as <a href="#text">text</a> if they have
* names. For time zones representing a GMT offset value, the
* following syntax is used:
* <pre>
* <a name="GMTOffsetTimeZone"><i>GMTOffsetTimeZone:</i></a>
* <code>GMT</code> <i>Sign</i> <i>Hours</i> <code>:</code> <i>Minutes</i>
* <i>Sign:</i> one of
* <code>+ -</code>
* <i>Hours:</i>
* <i>Digit</i>
* <i>Digit</i> <i>Digit</i>
* <i>Minutes:</i>
* <i>Digit</i> <i>Digit</i>
* <i>Digit:</i> one of
* <code>0 1 2 3 4 5 6 7 8 9</code></pre>
* <i>Hours</i> must be between 0 and 23, and <i>Minutes</i> must be between
* 00 and 59. The format is locale independent and digits must be taken
* from the Basic Latin block of the Unicode standard.
* <p>For parsing, <a href="#rfc822timezone">RFC 822 time zones</a> are also
* accepted.<br><br></li>
* <li><strong><a name="rfc822timezone">RFC 822 time zone:</a></strong>
* For formatting, the RFC 822 4-digit time zone format is used:
*
* <pre>
* <i>RFC822TimeZone:</i>
* <i>Sign</i> <i>TwoDigitHours</i> <i>Minutes</i>
* <i>TwoDigitHours:</i>
* <i>Digit Digit</i></pre>
* <i>TwoDigitHours</i> must be between 00 and 23. Other definitions
* are as for <a href="#timezone">general time zones</a>.
*
* <p>For parsing, <a href="#timezone">general time zones</a> are also
* accepted.
* <li><strong><a name="iso8601timezone">ISO 8601 Time zone:</a></strong>
* The number of pattern letters designates the format for both formatting
* and parsing as follows:
* <pre>
* <i>ISO8601TimeZone:</i>
* <i>OneLetterISO8601TimeZone</i>
* <i>TwoLetterISO8601TimeZone</i>
* <i>ThreeLetterISO8601TimeZone</i>
* <i>OneLetterISO8601TimeZone:</i>
* <i>Sign</i> <i>TwoDigitHours</i>
* {@code Z}
* <i>TwoLetterISO8601TimeZone:</i>
* <i>Sign</i> <i>TwoDigitHours</i> <i>Minutes</i>
* {@code Z}
* <i>ThreeLetterISO8601TimeZone:</i>
* <i>Sign</i> <i>TwoDigitHours</i> {@code :} <i>Minutes</i>
* {@code Z}</pre>
* Other definitions are as for <a href="#timezone">general time zones</a> or
* <a href="#rfc822timezone">RFC 822 time zones</a>.
*
* <p>For formatting, if the offset value from GMT is 0, {@code "Z"} is
* produced. If the number of pattern letters is 1, any fraction of an hour
* is ignored. For example, if the pattern is {@code "X"} and the time zone is
* {@code "GMT+05:30"}, {@code "+05"} is produced.
*
* <p>For parsing, {@code "Z"} is parsed as the UTC time zone designator.
* <a href="#timezone">General time zones</a> are <em>not</em> accepted.
*
* <p>If the number of pattern letters is 4 or more, {@link
* IllegalArgumentException} is thrown when constructing a {@code
* SimpleDateFormat} or {@linkplain #applyPattern(String) applying a
* pattern}.
* </ul>
* <code>SimpleDateFormat</code> also supports <em>localized date and time
* pattern</em> strings. In these strings, the pattern letters described above
* may be replaced with other, locale dependent, pattern letters.
* <code>SimpleDateFormat</code> does not deal with the localization of text
* other than the pattern letters; that's up to the client of the class.
*
* <h4>Examples</h4>
*
* The following examples show how date and time patterns are interpreted in
* the U.S. locale. The given date and time are 2001-07-04 12:08:56 local time
* in the U.S. Pacific Time time zone.
* <blockquote>
* <table border=0 cellspacing=3 cellpadding=0 summary="Examples of date and time patterns interpreted in the U.S. locale">
* <tr style="background-color: rgb(204, 204, 255);">
* <th align=left>Date and Time Pattern
* <th align=left>Result
* <tr>
* <td><code>"yyyy.MM.dd G 'at' HH:mm:ss z"</code>
* <td><code>2001.07.04 AD at 12:08:56 PDT</code>
* <tr style="background-color: rgb(238, 238, 255);">
* <td><code>"EEE, MMM d, ''yy"</code>
* <td><code>Wed, Jul 4, '01</code>
* <tr>
* <td><code>"h:mm a"</code>
* <td><code>12:08 PM</code>
* <tr style="background-color: rgb(238, 238, 255);">
* <td><code>"hh 'o''clock' a, zzzz"</code>
* <td><code>12 o'clock PM, Pacific Daylight Time</code>
* <tr>
* <td><code>"K:mm a, z"</code>
* <td><code>0:08 PM, PDT</code>
* <tr style="background-color: rgb(238, 238, 255);">
* <td><code>"yyyyy.MMMMM.dd GGG hh:mm aaa"</code>
* <td><code>02001.July.04 AD 12:08 PM</code>
* <tr>
* <td><code>"EEE, d MMM yyyy HH:mm:ss Z"</code>
* <td><code>Wed, 4 Jul 2001 12:08:56 -0700</code>
* <tr style="background-color: rgb(238, 238, 255);">
* <td><code>"yyMMddHHmmssZ"</code>
* <td><code>010704120856-0700</code>
* <tr>
* <td><code>"yyyy-MM-dd'T'HH:mm:ss.SSSZ"</code>
* <td><code>2001-07-04T12:08:56.235-0700</code>
* <tr style="background-color: rgb(238, 238, 255);">
* <td><code>"yyyy-MM-dd'T'HH:mm:ss.SSSXXX"</code>
* <td><code>2001-07-04T12:08:56.235-07:00</code>
* <tr>
* <td><code>"YYYY-'W'ww-u"</code>
* <td><code>2001-W27-3</code>
* </table>
* </blockquote>
*
* <h4><a name="synchronization">Synchronization</a></h4>
*
* <p>
* Date formats are not synchronized.
* It is recommended to create separate format instances for each thread.
* If multiple threads access a format concurrently, it must be synchronized
* externally.
*
* @see <a href="https://docs.oracle.com/javase/tutorial/i18n/format/simpleDateFormat.html">Java Tutorial</a>
* @see java.util.Calendar
* @see java.util.TimeZone
* @see DateFormat
* @see DateFormatSymbols
* @author Mark Davis, Chen-Lieh Huang, Alan Liu
*/
public class
SimpleDateFormat extends
DateFormat {
// the official serial version ID which says cryptically
// which version we're compatible with
static final long
serialVersionUID = 4774881970558875024L;
// the internal serial version which says which version was written
// - 0 (default) for version up to JDK 1.1.3
// - 1 for version from JDK 1.1.4, which includes a new field
static final int
currentSerialVersion = 1;
/**
* The version of the serialized data on the stream. Possible values:
* <ul>
* <li><b>0</b> or not present on stream: JDK 1.1.3. This version
* has no <code>defaultCenturyStart</code> on stream.
* <li><b>1</b> JDK 1.1.4 or later. This version adds
* <code>defaultCenturyStart</code>.
* </ul>
* When streaming out this class, the most recent format
* and the highest allowable <code>serialVersionOnStream</code>
* is written.
* @serial
* @since JDK1.1.4
*/
private int
serialVersionOnStream =
currentSerialVersion;
/**
* The pattern string of this formatter. This is always a non-localized
* pattern. May not be null. See class documentation for details.
* @serial
*/
private
String pattern;
/**
* Saved numberFormat and pattern.
* @see SimpleDateFormat#checkNegativeNumberExpression
*/
transient private
NumberFormat originalNumberFormat;
transient private
String originalNumberPattern;
/**
* The minus sign to be used with format and parse.
*/
transient private char
minusSign = '-';
/**
* True when a negative sign follows a number.
* (True as default in Arabic.)
*/
transient private boolean
hasFollowingMinusSign = false;
/**
* True if standalone form needs to be used.
*/
transient private boolean
forceStandaloneForm = false;
/**
* The compiled pattern.
*/
transient private char[]
compiledPattern;
/**
* Tags for the compiled pattern.
*/
private final static int
TAG_QUOTE_ASCII_CHAR = 100;
private final static int
TAG_QUOTE_CHARS = 101;
/**
* Locale dependent digit zero.
* @see #zeroPaddingNumber
* @see java.text.DecimalFormatSymbols#getZeroDigit
*/
transient private char
zeroDigit;
/**
* The symbols used by this formatter for week names, month names,
* etc. May not be null.
* @serial
* @see java.text.DateFormatSymbols
*/
private
DateFormatSymbols formatData;
/**
* We map dates with two-digit years into the century starting at
* <code>defaultCenturyStart</code>, which may be any date. May
* not be null.
* @serial
* @since JDK1.1.4
*/
private
Date defaultCenturyStart;
transient private int
defaultCenturyStartYear;
private static final int
MILLIS_PER_MINUTE = 60 * 1000;
// For time zones that have no names, use strings GMT+minutes and
// GMT-minutes. For instance, in France the time zone is GMT+60.
private static final
String GMT = "GMT";
/**
* Cache NumberFormat instances with Locale key.
*/
private static final
ConcurrentMap<
Locale,
NumberFormat>
cachedNumberFormatData
= new
ConcurrentHashMap<>(3);
/**
* The Locale used to instantiate this
* <code>SimpleDateFormat</code>. The value may be null if this object
* has been created by an older <code>SimpleDateFormat</code> and
* deserialized.
*
* @serial
* @since 1.6
*/
private
Locale locale;
/**
* Indicates whether this <code>SimpleDateFormat</code> should use
* the DateFormatSymbols. If true, the format and parse methods
* use the DateFormatSymbols values. If false, the format and
* parse methods call Calendar.getDisplayName or
* Calendar.getDisplayNames.
*/
transient boolean
useDateFormatSymbols;
/**
* Constructs a <code>SimpleDateFormat</code> using the default pattern and
* date format symbols for the default
* {@link java.util.Locale.Category#FORMAT FORMAT} locale.
* <b>Note:</b> This constructor may not support all locales.
* For full coverage, use the factory methods in the {@link DateFormat}
* class.
*/
public
SimpleDateFormat() {
this("",
Locale.
getDefault(
Locale.
Category.
FORMAT));
applyPatternImpl(
LocaleProviderAdapter.
getResourceBundleBased().
getLocaleResources(
locale)
.
getDateTimePattern(
SHORT,
SHORT,
calendar));
}
/**
* Constructs a <code>SimpleDateFormat</code> using the given pattern and
* the default date format symbols for the default
* {@link java.util.Locale.Category#FORMAT FORMAT} locale.
* <b>Note:</b> This constructor may not support all locales.
* For full coverage, use the factory methods in the {@link DateFormat}
* class.
* <p>This is equivalent to calling
* {@link #SimpleDateFormat(String, Locale)
* SimpleDateFormat(pattern, Locale.getDefault(Locale.Category.FORMAT))}.
*
* @see java.util.Locale#getDefault(java.util.Locale.Category)
* @see java.util.Locale.Category#FORMAT
* @param pattern the pattern describing the date and time format
* @exception NullPointerException if the given pattern is null
* @exception IllegalArgumentException if the given pattern is invalid
*/
public
SimpleDateFormat(
String pattern)
{
this(
pattern,
Locale.
getDefault(
Locale.
Category.
FORMAT));
}
/**
* Constructs a <code>SimpleDateFormat</code> using the given pattern and
* the default date format symbols for the given locale.
* <b>Note:</b> This constructor may not support all locales.
* For full coverage, use the factory methods in the {@link DateFormat}
* class.
*
* @param pattern the pattern describing the date and time format
* @param locale the locale whose date format symbols should be used
* @exception NullPointerException if the given pattern or locale is null
* @exception IllegalArgumentException if the given pattern is invalid
*/
public
SimpleDateFormat(
String pattern,
Locale locale)
{
if (
pattern == null ||
locale == null) {
throw new
NullPointerException();
}
initializeCalendar(
locale);
this.
pattern =
pattern;
this.
formatData =
DateFormatSymbols.
getInstanceRef(
locale);
this.
locale =
locale;
initialize(
locale);
}
/**
* Constructs a <code>SimpleDateFormat</code> using the given pattern and
* date format symbols.
*
* @param pattern the pattern describing the date and time format
* @param formatSymbols the date format symbols to be used for formatting
* @exception NullPointerException if the given pattern or formatSymbols is null
* @exception IllegalArgumentException if the given pattern is invalid
*/
public
SimpleDateFormat(
String pattern,
DateFormatSymbols formatSymbols)
{
if (
pattern == null ||
formatSymbols == null) {
throw new
NullPointerException();
}
this.
pattern =
pattern;
this.
formatData = (
DateFormatSymbols)
formatSymbols.
clone();
this.
locale =
Locale.
getDefault(
Locale.
Category.
FORMAT);
initializeCalendar(this.
locale);
initialize(this.
locale);
useDateFormatSymbols = true;
}
/* Initialize compiledPattern and numberFormat fields */
private void
initialize(
Locale loc) {
// Verify and compile the given pattern.
compiledPattern =
compile(
pattern);
/* try the cache first */
numberFormat =
cachedNumberFormatData.
get(
loc);
if (
numberFormat == null) { /* cache miss */
numberFormat =
NumberFormat.
getIntegerInstance(
loc);
numberFormat.
setGroupingUsed(false);
/* update cache */
cachedNumberFormatData.
putIfAbsent(
loc,
numberFormat);
}
numberFormat = (
NumberFormat)
numberFormat.
clone();
initializeDefaultCentury();
}
private void
initializeCalendar(
Locale loc) {
if (
calendar == null) {
assert
loc != null;
// The format object must be constructed using the symbols for this zone.
// However, the calendar should use the current default TimeZone.
// If this is not contained in the locale zone strings, then the zone
// will be formatted using generic GMT+/-H:MM nomenclature.
calendar =
Calendar.
getInstance(
TimeZone.
getDefault(),
loc);
}
}
/**
* Returns the compiled form of the given pattern. The syntax of
* the compiled pattern is:
* <blockquote>
* CompiledPattern:
* EntryList
* EntryList:
* Entry
* EntryList Entry
* Entry:
* TagField
* TagField data
* TagField:
* Tag Length
* TaggedData
* Tag:
* pattern_char_index
* TAG_QUOTE_CHARS
* Length:
* short_length
* long_length
* TaggedData:
* TAG_QUOTE_ASCII_CHAR ascii_char
*
* </blockquote>
*
* where `short_length' is an 8-bit unsigned integer between 0 and
* 254. `long_length' is a sequence of an 8-bit integer 255 and a
* 32-bit signed integer value which is split into upper and lower
* 16-bit fields in two char's. `pattern_char_index' is an 8-bit
* integer between 0 and 18. `ascii_char' is an 7-bit ASCII
* character value. `data' depends on its Tag value.
* <p>
* If Length is short_length, Tag and short_length are packed in a
* single char, as illustrated below.
* <blockquote>
* char[0] = (Tag << 8) | short_length;
* </blockquote>
*
* If Length is long_length, Tag and 255 are packed in the first
* char and a 32-bit integer, as illustrated below.
* <blockquote>
* char[0] = (Tag << 8) | 255;
* char[1] = (char) (long_length >>> 16);
* char[2] = (char) (long_length & 0xffff);
* </blockquote>
* <p>
* If Tag is a pattern_char_index, its Length is the number of
* pattern characters. For example, if the given pattern is
* "yyyy", Tag is 1 and Length is 4, followed by no data.
* <p>
* If Tag is TAG_QUOTE_CHARS, its Length is the number of char's
* following the TagField. For example, if the given pattern is
* "'o''clock'", Length is 7 followed by a char sequence of
* <code>o&nbs;'&nbs;c&nbs;l&nbs;o&nbs;c&nbs;k</code>.
* <p>
* TAG_QUOTE_ASCII_CHAR is a special tag and has an ASCII
* character in place of Length. For example, if the given pattern
* is "'o'", the TaggedData entry is
* <code>((TAG_QUOTE_ASCII_CHAR&nbs;<<&nbs;8)&nbs;|&nbs;'o')</code>.
*
* @exception NullPointerException if the given pattern is null
* @exception IllegalArgumentException if the given pattern is invalid
*/
private char[]
compile(
String pattern) {
int
length =
pattern.
length();
boolean
inQuote = false;
StringBuilder compiledCode = new
StringBuilder(
length * 2);
StringBuilder tmpBuffer = null;
int
count = 0,
tagcount = 0;
int
lastTag = -1,
prevTag = -1;
for (int
i = 0;
i <
length;
i++) {
char
c =
pattern.
charAt(
i);
if (
c == '\'') {
// '' is treated as a single quote regardless of being
// in a quoted section.
if ((
i + 1) <
length) {
c =
pattern.
charAt(
i + 1);
if (
c == '\'') {
i++;
if (
count != 0) {
encode(
lastTag,
count,
compiledCode);
tagcount++;
prevTag =
lastTag;
lastTag = -1;
count = 0;
}
if (
inQuote) {
tmpBuffer.
append(
c);
} else {
compiledCode.
append((char)(
TAG_QUOTE_ASCII_CHAR << 8 |
c));
}
continue;
}
}
if (!
inQuote) {
if (
count != 0) {
encode(
lastTag,
count,
compiledCode);
tagcount++;
prevTag =
lastTag;
lastTag = -1;
count = 0;
}
if (
tmpBuffer == null) {
tmpBuffer = new
StringBuilder(
length);
} else {
tmpBuffer.
setLength(0);
}
inQuote = true;
} else {
int
len =
tmpBuffer.
length();
if (
len == 1) {
char
ch =
tmpBuffer.
charAt(0);
if (
ch < 128) {
compiledCode.
append((char)(
TAG_QUOTE_ASCII_CHAR << 8 |
ch));
} else {
compiledCode.
append((char)(
TAG_QUOTE_CHARS << 8 | 1));
compiledCode.
append(
ch);
}
} else {
encode(
TAG_QUOTE_CHARS,
len,
compiledCode);
compiledCode.
append(
tmpBuffer);
}
inQuote = false;
}
continue;
}
if (
inQuote) {
tmpBuffer.
append(
c);
continue;
}
if (!(
c >= 'a' &&
c <= 'z' ||
c >= 'A' &&
c <= 'Z')) {
if (
count != 0) {
encode(
lastTag,
count,
compiledCode);
tagcount++;
prevTag =
lastTag;
lastTag = -1;
count = 0;
}
if (
c < 128) {
// In most cases, c would be a delimiter, such as ':'.
compiledCode.
append((char)(
TAG_QUOTE_ASCII_CHAR << 8 |
c));
} else {
// Take any contiguous non-ASCII alphabet characters and
// put them in a single TAG_QUOTE_CHARS.
int
j;
for (
j =
i + 1;
j <
length;
j++) {
char
d =
pattern.
charAt(
j);
if (
d == '\'' || (
d >= 'a' &&
d <= 'z' ||
d >= 'A' &&
d <= 'Z')) {
break;
}
}
compiledCode.
append((char)(
TAG_QUOTE_CHARS << 8 | (
j -
i)));
for (;
i <
j;
i++) {
compiledCode.
append(
pattern.
charAt(
i));
}
i--;
}
continue;
}
int
tag;
if ((
tag =
DateFormatSymbols.
patternChars.
indexOf(
c)) == -1) {
throw new
IllegalArgumentException("Illegal pattern character " +
"'" +
c + "'");
}
if (
lastTag == -1 ||
lastTag ==
tag) {
lastTag =
tag;
count++;
continue;
}
encode(
lastTag,
count,
compiledCode);
tagcount++;
prevTag =
lastTag;
lastTag =
tag;
count = 1;
}
if (
inQuote) {
throw new
IllegalArgumentException("Unterminated quote");
}
if (
count != 0) {
encode(
lastTag,
count,
compiledCode);
tagcount++;
prevTag =
lastTag;
}
forceStandaloneForm = (
tagcount == 1 &&
prevTag ==
PATTERN_MONTH);
// Copy the compiled pattern to a char array
int
len =
compiledCode.
length();
char[]
r = new char[
len];
compiledCode.
getChars(0,
len,
r, 0);
return
r;
}
/**
* Encodes the given tag and length and puts encoded char(s) into buffer.
*/
private static void
encode(int
tag, int
length,
StringBuilder buffer) {
if (
tag ==
PATTERN_ISO_ZONE &&
length >= 4) {
throw new
IllegalArgumentException("invalid ISO 8601 format: length=" +
length);
}
if (
length < 255) {
buffer.
append((char)(
tag << 8 |
length));
} else {
buffer.
append((char)((
tag << 8) | 0xff));
buffer.
append((char)(
length >>> 16));
buffer.
append((char)(
length & 0xffff));
}
}
/* Initialize the fields we use to disambiguate ambiguous years. Separate
* so we can call it from readObject().
*/
private void
initializeDefaultCentury() {
calendar.
setTimeInMillis(
System.
currentTimeMillis());
calendar.
add(
Calendar.
YEAR, -80 );
parseAmbiguousDatesAsAfter(
calendar.
getTime());
}
/* Define one-century window into which to disambiguate dates using
* two-digit years.
*/
private void
parseAmbiguousDatesAsAfter(
Date startDate) {
defaultCenturyStart =
startDate;
calendar.
setTime(
startDate);
defaultCenturyStartYear =
calendar.
get(
Calendar.
YEAR);
}
/**
* Sets the 100-year period 2-digit years will be interpreted as being in
* to begin on the date the user specifies.
*
* @param startDate During parsing, two digit years will be placed in the range
* <code>startDate</code> to <code>startDate + 100 years</code>.
* @see #get2DigitYearStart
* @since 1.2
*/
public void
set2DigitYearStart(
Date startDate) {
parseAmbiguousDatesAsAfter(new
Date(
startDate.
getTime()));
}
/**
* Returns the beginning date of the 100-year period 2-digit years are interpreted
* as being within.
*
* @return the start of the 100-year period into which two digit years are
* parsed
* @see #set2DigitYearStart
* @since 1.2
*/
public
Date get2DigitYearStart() {
return (
Date)
defaultCenturyStart.
clone();
}
/**
* Formats the given <code>Date</code> into a date/time string and appends
* the result to the given <code>StringBuffer</code>.
*
* @param date the date-time value to be formatted into a date-time string.
* @param toAppendTo where the new date-time text is to be appended.
* @param pos the formatting position. On input: an alignment field,
* if desired. On output: the offsets of the alignment field.
* @return the formatted date-time string.
* @exception NullPointerException if the given {@code date} is {@code null}.
*/
@
Override
public
StringBuffer format(
Date date,
StringBuffer toAppendTo,
FieldPosition pos)
{
pos.
beginIndex =
pos.
endIndex = 0;
return
format(
date,
toAppendTo,
pos.
getFieldDelegate());
}
// Called from Format after creating a FieldDelegate
private
StringBuffer format(
Date date,
StringBuffer toAppendTo,
FieldDelegate delegate) {
// Convert input date to time field list
calendar.
setTime(
date);
boolean
useDateFormatSymbols =
useDateFormatSymbols();
for (int
i = 0;
i <
compiledPattern.length; ) {
int
tag =
compiledPattern[
i] >>> 8;
int
count =
compiledPattern[
i++] & 0xff;
if (
count == 255) {
count =
compiledPattern[
i++] << 16;
count |=
compiledPattern[
i++];
}
switch (
tag) {
case
TAG_QUOTE_ASCII_CHAR:
toAppendTo.
append((char)
count);
break;
case
TAG_QUOTE_CHARS:
toAppendTo.
append(
compiledPattern,
i,
count);
i +=
count;
break;
default:
subFormat(
tag,
count,
delegate,
toAppendTo,
useDateFormatSymbols);
break;
}
}
return
toAppendTo;
}
/**
* Formats an Object producing an <code>AttributedCharacterIterator</code>.
* You can use the returned <code>AttributedCharacterIterator</code>
* to build the resulting String, as well as to determine information
* about the resulting String.
* <p>
* Each attribute key of the AttributedCharacterIterator will be of type
* <code>DateFormat.Field</code>, with the corresponding attribute value
* being the same as the attribute key.
*
* @exception NullPointerException if obj is null.
* @exception IllegalArgumentException if the Format cannot format the
* given object, or if the Format's pattern string is invalid.
* @param obj The object to format
* @return AttributedCharacterIterator describing the formatted value.
* @since 1.4
*/
@
Override
public
AttributedCharacterIterator formatToCharacterIterator(
Object obj) {
StringBuffer sb = new
StringBuffer();
CharacterIteratorFieldDelegate delegate = new
CharacterIteratorFieldDelegate();
if (
obj instanceof
Date) {
format((
Date)
obj,
sb,
delegate);
}
else if (
obj instanceof
Number) {
format(new
Date(((
Number)
obj).
longValue()),
sb,
delegate);
}
else if (
obj == null) {
throw new
NullPointerException(
"formatToCharacterIterator must be passed non-null object");
}
else {
throw new
IllegalArgumentException(
"Cannot format given Object as a Date");
}
return
delegate.
getIterator(
sb.
toString());
}
// Map index into pattern character string to Calendar field number
private static final int[]
PATTERN_INDEX_TO_CALENDAR_FIELD = {
Calendar.
ERA,
Calendar.
YEAR,
Calendar.
MONTH,
Calendar.
DATE,
Calendar.
HOUR_OF_DAY,
Calendar.
HOUR_OF_DAY,
Calendar.
MINUTE,
Calendar.
SECOND,
Calendar.
MILLISECOND,
Calendar.
DAY_OF_WEEK,
Calendar.
DAY_OF_YEAR,
Calendar.
DAY_OF_WEEK_IN_MONTH,
Calendar.
WEEK_OF_YEAR,
Calendar.
WEEK_OF_MONTH,
Calendar.
AM_PM,
Calendar.
HOUR,
Calendar.
HOUR,
Calendar.
ZONE_OFFSET,
Calendar.
ZONE_OFFSET,
CalendarBuilder.
WEEK_YEAR, // Pseudo Calendar field
CalendarBuilder.
ISO_DAY_OF_WEEK, // Pseudo Calendar field
Calendar.
ZONE_OFFSET,
Calendar.
MONTH
};
// Map index into pattern character string to DateFormat field number
private static final int[]
PATTERN_INDEX_TO_DATE_FORMAT_FIELD = {
DateFormat.
ERA_FIELD,
DateFormat.
YEAR_FIELD,
DateFormat.
MONTH_FIELD,
DateFormat.
DATE_FIELD,
DateFormat.
HOUR_OF_DAY1_FIELD,
DateFormat.
HOUR_OF_DAY0_FIELD,
DateFormat.
MINUTE_FIELD,
DateFormat.
SECOND_FIELD,
DateFormat.
MILLISECOND_FIELD,
DateFormat.
DAY_OF_WEEK_FIELD,
DateFormat.
DAY_OF_YEAR_FIELD,
DateFormat.
DAY_OF_WEEK_IN_MONTH_FIELD,
DateFormat.
WEEK_OF_YEAR_FIELD,
DateFormat.
WEEK_OF_MONTH_FIELD,
DateFormat.
AM_PM_FIELD,
DateFormat.
HOUR1_FIELD,
DateFormat.
HOUR0_FIELD,
DateFormat.
TIMEZONE_FIELD,
DateFormat.
TIMEZONE_FIELD,
DateFormat.
YEAR_FIELD,
DateFormat.
DAY_OF_WEEK_FIELD,
DateFormat.
TIMEZONE_FIELD,
DateFormat.
MONTH_FIELD
};
// Maps from DecimalFormatSymbols index to Field constant
private static final
Field[]
PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID = {
Field.
ERA,
Field.
YEAR,
Field.
MONTH,
Field.
DAY_OF_MONTH,
Field.
HOUR_OF_DAY1,
Field.
HOUR_OF_DAY0,
Field.
MINUTE,
Field.
SECOND,
Field.
MILLISECOND,
Field.
DAY_OF_WEEK,
Field.
DAY_OF_YEAR,
Field.
DAY_OF_WEEK_IN_MONTH,
Field.
WEEK_OF_YEAR,
Field.
WEEK_OF_MONTH,
Field.
AM_PM,
Field.
HOUR1,
Field.
HOUR0,
Field.
TIME_ZONE,
Field.
TIME_ZONE,
Field.
YEAR,
Field.
DAY_OF_WEEK,
Field.
TIME_ZONE,
Field.
MONTH
};
/**
* Private member function that does the real date/time formatting.
*/
private void
subFormat(int
patternCharIndex, int
count,
FieldDelegate delegate,
StringBuffer buffer,
boolean
useDateFormatSymbols)
{
int
maxIntCount =
Integer.
MAX_VALUE;
String current = null;
int
beginOffset =
buffer.
length();
int
field =
PATTERN_INDEX_TO_CALENDAR_FIELD[
patternCharIndex];
int
value;
if (
field ==
CalendarBuilder.
WEEK_YEAR) {
if (
calendar.
isWeekDateSupported()) {
value =
calendar.
getWeekYear();
} else {
// use calendar year 'y' instead
patternCharIndex =
PATTERN_YEAR;
field =
PATTERN_INDEX_TO_CALENDAR_FIELD[
patternCharIndex];
value =
calendar.
get(
field);
}
} else if (
field ==
CalendarBuilder.
ISO_DAY_OF_WEEK) {
value =
CalendarBuilder.
toISODayOfWeek(
calendar.
get(
Calendar.
DAY_OF_WEEK));
} else {
value =
calendar.
get(
field);
}
int
style = (
count >= 4) ?
Calendar.
LONG :
Calendar.
SHORT;
if (!
useDateFormatSymbols &&
field <
Calendar.
ZONE_OFFSET
&&
patternCharIndex !=
PATTERN_MONTH_STANDALONE) {
current =
calendar.
getDisplayName(
field,
style,
locale);
}
// Note: zeroPaddingNumber() assumes that maxDigits is either
// 2 or maxIntCount. If we make any changes to this,
// zeroPaddingNumber() must be fixed.
switch (
patternCharIndex) {
case
PATTERN_ERA: // 'G'
if (
useDateFormatSymbols) {
String[]
eras =
formatData.
getEras();
if (
value <
eras.length) {
current =
eras[
value];
}
}
if (
current == null) {
current = "";
}
break;
case
PATTERN_WEEK_YEAR: // 'Y'
case
PATTERN_YEAR: // 'y'
if (
calendar instanceof
GregorianCalendar) {
if (
count != 2) {
zeroPaddingNumber(
value,
count,
maxIntCount,
buffer);
} else {
zeroPaddingNumber(
value, 2, 2,
buffer);
} // clip 1996 to 96
} else {
if (
current == null) {
zeroPaddingNumber(
value,
style ==
Calendar.
LONG ? 1 :
count,
maxIntCount,
buffer);
}
}
break;
case
PATTERN_MONTH: // 'M' (context seinsive)
if (
useDateFormatSymbols) {
String[]
months;
if (
count >= 4) {
months =
formatData.
getMonths();
current =
months[
value];
} else if (
count == 3) {
months =
formatData.
getShortMonths();
current =
months[
value];
}
} else {
if (
count < 3) {
current = null;
} else if (
forceStandaloneForm) {
current =
calendar.
getDisplayName(
field,
style | 0x8000,
locale);
if (
current == null) {
current =
calendar.
getDisplayName(
field,
style,
locale);
}
}
}
if (
current == null) {
zeroPaddingNumber(
value+1,
count,
maxIntCount,
buffer);
}
break;
case
PATTERN_MONTH_STANDALONE: // 'L'
assert
current == null;
if (
locale == null) {
String[]
months;
if (
count >= 4) {
months =
formatData.
getMonths();
current =
months[
value];
} else if (
count == 3) {
months =
formatData.
getShortMonths();
current =
months[
value];
}
} else {
if (
count >= 3) {
current =
calendar.
getDisplayName(
field,
style | 0x8000,
locale);
}
}
if (
current == null) {
zeroPaddingNumber(
value+1,
count,
maxIntCount,
buffer);
}
break;
case
PATTERN_HOUR_OF_DAY1: // 'k' 1-based. eg, 23:59 + 1 hour =>> 24:59
if (
current == null) {
if (
value == 0) {
zeroPaddingNumber(
calendar.
getMaximum(
Calendar.
HOUR_OF_DAY) + 1,
count,
maxIntCount,
buffer);
} else {
zeroPaddingNumber(
value,
count,
maxIntCount,
buffer);
}
}
break;
case
PATTERN_DAY_OF_WEEK: // 'E'
if (
useDateFormatSymbols) {
String[]
weekdays;
if (
count >= 4) {
weekdays =
formatData.
getWeekdays();
current =
weekdays[
value];
} else { // count < 4, use abbreviated form if exists
weekdays =
formatData.
getShortWeekdays();
current =
weekdays[
value];
}
}
break;
case
PATTERN_AM_PM: // 'a'
if (
useDateFormatSymbols) {
String[]
ampm =
formatData.
getAmPmStrings();
current =
ampm[
value];
}
break;
case
PATTERN_HOUR1: // 'h' 1-based. eg, 11PM + 1 hour =>> 12 AM
if (
current == null) {
if (
value == 0) {
zeroPaddingNumber(
calendar.
getLeastMaximum(
Calendar.
HOUR) + 1,
count,
maxIntCount,
buffer);
} else {
zeroPaddingNumber(
value,
count,
maxIntCount,
buffer);
}
}
break;
case
PATTERN_ZONE_NAME: // 'z'
if (
current == null) {
if (
formatData.
locale == null ||
formatData.
isZoneStringsSet) {
int
zoneIndex =
formatData.
getZoneIndex(
calendar.
getTimeZone().
getID());
if (
zoneIndex == -1) {
value =
calendar.
get(
Calendar.
ZONE_OFFSET) +
calendar.
get(
Calendar.
DST_OFFSET);
buffer.
append(
ZoneInfoFile.
toCustomID(
value));
} else {
int
index = (
calendar.
get(
Calendar.
DST_OFFSET) == 0) ? 1: 3;
if (
count < 4) {
// Use the short name
index++;
}
String[][]
zoneStrings =
formatData.
getZoneStringsWrapper();
buffer.
append(
zoneStrings[
zoneIndex][
index]);
}
} else {
TimeZone tz =
calendar.
getTimeZone();
boolean
daylight = (
calendar.
get(
Calendar.
DST_OFFSET) != 0);
int
tzstyle = (
count < 4 ?
TimeZone.
SHORT :
TimeZone.
LONG);
buffer.
append(
tz.
getDisplayName(
daylight,
tzstyle,
formatData.
locale));
}
}
break;
case
PATTERN_ZONE_VALUE: // 'Z' ("-/+hhmm" form)
value = (
calendar.
get(
Calendar.
ZONE_OFFSET) +
calendar.
get(
Calendar.
DST_OFFSET)) / 60000;
int
width = 4;
if (
value >= 0) {
buffer.
append('+');
} else {
width++;
}
int
num = (
value / 60) * 100 + (
value % 60);
CalendarUtils.
sprintf0d(
buffer,
num,
width);
break;
case
PATTERN_ISO_ZONE: // 'X'
value =
calendar.
get(
Calendar.
ZONE_OFFSET)
+
calendar.
get(
Calendar.
DST_OFFSET);
if (
value == 0) {
buffer.
append('Z');
break;
}
value /= 60000;
if (
value >= 0) {
buffer.
append('+');
} else {
buffer.
append('-');
value = -
value;
}
CalendarUtils.
sprintf0d(
buffer,
value / 60, 2);
if (
count == 1) {
break;
}
if (
count == 3) {
buffer.
append(':');
}
CalendarUtils.
sprintf0d(
buffer,
value % 60, 2);
break;
default:
// case PATTERN_DAY_OF_MONTH: // 'd'
// case PATTERN_HOUR_OF_DAY0: // 'H' 0-based. eg, 23:59 + 1 hour =>> 00:59
// case PATTERN_MINUTE: // 'm'
// case PATTERN_SECOND: // 's'
// case PATTERN_MILLISECOND: // 'S'
// case PATTERN_DAY_OF_YEAR: // 'D'
// case PATTERN_DAY_OF_WEEK_IN_MONTH: // 'F'
// case PATTERN_WEEK_OF_YEAR: // 'w'
// case PATTERN_WEEK_OF_MONTH: // 'W'
// case PATTERN_HOUR0: // 'K' eg, 11PM + 1 hour =>> 0 AM
// case PATTERN_ISO_DAY_OF_WEEK: // 'u' pseudo field, Monday = 1, ..., Sunday = 7
if (
current == null) {
zeroPaddingNumber(
value,
count,
maxIntCount,
buffer);
}
break;
} // switch (patternCharIndex)
if (
current != null) {
buffer.
append(
current);
}
int
fieldID =
PATTERN_INDEX_TO_DATE_FORMAT_FIELD[
patternCharIndex];
Field f =
PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID[
patternCharIndex];
delegate.
formatted(
fieldID,
f,
f,
beginOffset,
buffer.
length(),
buffer);
}
/**
* Formats a number with the specified minimum and maximum number of digits.
*/
private void
zeroPaddingNumber(int
value, int
minDigits, int
maxDigits,
StringBuffer buffer)
{
// Optimization for 1, 2 and 4 digit numbers. This should
// cover most cases of formatting date/time related items.
// Note: This optimization code assumes that maxDigits is
// either 2 or Integer.MAX_VALUE (maxIntCount in format()).
try {
if (
zeroDigit == 0) {
zeroDigit = ((
DecimalFormat)
numberFormat).
getDecimalFormatSymbols().
getZeroDigit();
}
if (
value >= 0) {
if (
value < 100 &&
minDigits >= 1 &&
minDigits <= 2) {
if (
value < 10) {
if (
minDigits == 2) {
buffer.
append(
zeroDigit);
}
buffer.
append((char)(
zeroDigit +
value));
} else {
buffer.
append((char)(
zeroDigit +
value / 10));
buffer.
append((char)(
zeroDigit +
value % 10));
}
return;
} else if (
value >= 1000 &&
value < 10000) {
if (
minDigits == 4) {
buffer.
append((char)(
zeroDigit +
value / 1000));
value %= 1000;
buffer.
append((char)(
zeroDigit +
value / 100));
value %= 100;
buffer.
append((char)(
zeroDigit +
value / 10));
buffer.
append((char)(
zeroDigit +
value % 10));
return;
}
if (
minDigits == 2 &&
maxDigits == 2) {
zeroPaddingNumber(
value % 100, 2, 2,
buffer);
return;
}
}
}
} catch (
Exception e) {
}
numberFormat.
setMinimumIntegerDigits(
minDigits);
numberFormat.
setMaximumIntegerDigits(
maxDigits);
numberFormat.
format((long)
value,
buffer,
DontCareFieldPosition.
INSTANCE);
}
/**
* Parses text from a string to produce a <code>Date</code>.
* <p>
* The method attempts to parse text starting at the index given by
* <code>pos</code>.
* If parsing succeeds, then the index of <code>pos</code> is updated
* to the index after the last character used (parsing does not necessarily
* use all characters up to the end of the string), and the parsed
* date is returned. The updated <code>pos</code> can be used to
* indicate the starting point for the next call to this method.
* If an error occurs, then the index of <code>pos</code> is not
* changed, the error index of <code>pos</code> is set to the index of
* the character where the error occurred, and null is returned.
*
* <p>This parsing operation uses the {@link DateFormat#calendar
* calendar} to produce a {@code Date}. All of the {@code
* calendar}'s date-time fields are {@linkplain Calendar#clear()
* cleared} before parsing, and the {@code calendar}'s default
* values of the date-time fields are used for any missing
* date-time information. For example, the year value of the
* parsed {@code Date} is 1970 with {@link GregorianCalendar} if
* no year value is given from the parsing operation. The {@code
* TimeZone} value may be overwritten, depending on the given
* pattern and the time zone value in {@code text}. Any {@code
* TimeZone} value that has previously been set by a call to
* {@link #setTimeZone(java.util.TimeZone) setTimeZone} may need
* to be restored for further operations.
*
* @param text A <code>String</code>, part of which should be parsed.
* @param pos A <code>ParsePosition</code> object with index and error
* index information as described above.
* @return A <code>Date</code> parsed from the string. In case of
* error, returns null.
* @exception NullPointerException if <code>text</code> or <code>pos</code> is null.
*/
@
Override
public
Date parse(
String text,
ParsePosition pos)
{
checkNegativeNumberExpression();
int
start =
pos.
index;
int
oldStart =
start;
int
textLength =
text.
length();
boolean[]
ambiguousYear = {false};
CalendarBuilder calb = new
CalendarBuilder();
for (int
i = 0;
i <
compiledPattern.length; ) {
int
tag =
compiledPattern[
i] >>> 8;
int
count =
compiledPattern[
i++] & 0xff;
if (
count == 255) {
count =
compiledPattern[
i++] << 16;
count |=
compiledPattern[
i++];
}
switch (
tag) {
case
TAG_QUOTE_ASCII_CHAR:
if (
start >=
textLength ||
text.
charAt(
start) != (char)
count) {
pos.
index =
oldStart;
pos.
errorIndex =
start;
return null;
}
start++;
break;
case
TAG_QUOTE_CHARS:
while (
count-- > 0) {
if (
start >=
textLength ||
text.
charAt(
start) !=
compiledPattern[
i++]) {
pos.
index =
oldStart;
pos.
errorIndex =
start;
return null;
}
start++;
}
break;
default:
// Peek the next pattern to determine if we need to
// obey the number of pattern letters for
// parsing. It's required when parsing contiguous
// digit text (e.g., "20010704") with a pattern which
// has no delimiters between fields, like "yyyyMMdd".
boolean
obeyCount = false;
// In Arabic, a minus sign for a negative number is put after
// the number. Even in another locale, a minus sign can be
// put after a number using DateFormat.setNumberFormat().
// If both the minus sign and the field-delimiter are '-',
// subParse() needs to determine whether a '-' after a number
// in the given text is a delimiter or is a minus sign for the
// preceding number. We give subParse() a clue based on the
// information in compiledPattern.
boolean
useFollowingMinusSignAsDelimiter = false;
if (
i <
compiledPattern.length) {
int
nextTag =
compiledPattern[
i] >>> 8;
if (!(
nextTag ==
TAG_QUOTE_ASCII_CHAR ||
nextTag ==
TAG_QUOTE_CHARS)) {
obeyCount = true;
}
if (
hasFollowingMinusSign &&
(
nextTag ==
TAG_QUOTE_ASCII_CHAR ||
nextTag ==
TAG_QUOTE_CHARS)) {
int
c;
if (
nextTag ==
TAG_QUOTE_ASCII_CHAR) {
c =
compiledPattern[
i] & 0xff;
} else {
c =
compiledPattern[
i+1];
}
if (
c ==
minusSign) {
useFollowingMinusSignAsDelimiter = true;
}
}
}
start =
subParse(
text,
start,
tag,
count,
obeyCount,
ambiguousYear,
pos,
useFollowingMinusSignAsDelimiter,
calb);
if (
start < 0) {
pos.
index =
oldStart;
return null;
}
}
}
// At this point the fields of Calendar have been set. Calendar
// will fill in default values for missing fields when the time
// is computed.
pos.
index =
start;
Date parsedDate;
try {
parsedDate =
calb.
establish(
calendar).
getTime();
// If the year value is ambiguous,
// then the two-digit year == the default start year
if (
ambiguousYear[0]) {
if (
parsedDate.
before(
defaultCenturyStart)) {
parsedDate =
calb.
addYear(100).
establish(
calendar).
getTime();
}
}
}
// An IllegalArgumentException will be thrown by Calendar.getTime()
// if any fields are out of range, e.g., MONTH == 17.
catch (
IllegalArgumentException e) {
pos.
errorIndex =
start;
pos.
index =
oldStart;
return null;
}
return
parsedDate;
}
/**
* Private code-size reduction function used by subParse.
* @param text the time text being parsed.
* @param start where to start parsing.
* @param field the date field being parsed.
* @param data the string array to parsed.
* @return the new start position if matching succeeded; a negative number
* indicating matching failure, otherwise.
*/
private int
matchString(
String text, int
start, int
field,
String[]
data,
CalendarBuilder calb)
{
int
i = 0;
int
count =
data.length;
if (
field ==
Calendar.
DAY_OF_WEEK) {
i = 1;
}
// There may be multiple strings in the data[] array which begin with
// the same prefix (e.g., Cerven and Cervenec (June and July) in Czech).
// We keep track of the longest match, and return that. Note that this
// unfortunately requires us to test all array elements.
int
bestMatchLength = 0,
bestMatch = -1;
for (;
i<
count; ++
i)
{
int
length =
data[
i].
length();
// Always compare if we have no match yet; otherwise only compare
// against potentially better matches (longer strings).
if (
length >
bestMatchLength &&
text.
regionMatches(true,
start,
data[
i], 0,
length))
{
bestMatch =
i;
bestMatchLength =
length;
}
}
if (
bestMatch >= 0)
{
calb.
set(
field,
bestMatch);
return
start +
bestMatchLength;
}
return -
start;
}
/**
* Performs the same thing as matchString(String, int, int,
* String[]). This method takes a Map<String, Integer> instead of
* String[].
*/
private int
matchString(
String text, int
start, int
field,
Map<
String,
Integer>
data,
CalendarBuilder calb) {
if (
data != null) {
// TODO: make this default when it's in the spec.
if (
data instanceof
SortedMap) {
for (
String name :
data.
keySet()) {
if (
text.
regionMatches(true,
start,
name, 0,
name.
length())) {
calb.
set(
field,
data.
get(
name));
return
start +
name.
length();
}
}
return -
start;
}
String bestMatch = null;
for (
String name :
data.
keySet()) {
int
length =
name.
length();
if (
bestMatch == null ||
length >
bestMatch.
length()) {
if (
text.
regionMatches(true,
start,
name, 0,
length)) {
bestMatch =
name;
}
}
}
if (
bestMatch != null) {
calb.
set(
field,
data.
get(
bestMatch));
return
start +
bestMatch.
length();
}
}
return -
start;
}
private int
matchZoneString(
String text, int
start,
String[]
zoneNames) {
for (int
i = 1;
i <= 4; ++
i) {
// Checking long and short zones [1 & 2],
// and long and short daylight [3 & 4].
String zoneName =
zoneNames[
i];
if (
text.
regionMatches(true,
start,
zoneName, 0,
zoneName.
length())) {
return
i;
}
}
return -1;
}
private boolean
matchDSTString(
String text, int
start, int
zoneIndex, int
standardIndex,
String[][]
zoneStrings) {
int
index =
standardIndex + 2;
String zoneName =
zoneStrings[
zoneIndex][
index];
if (
text.
regionMatches(true,
start,
zoneName, 0,
zoneName.
length())) {
return true;
}
return false;
}
/**
* find time zone 'text' matched zoneStrings and set to internal
* calendar.
*/
private int
subParseZoneString(
String text, int
start,
CalendarBuilder calb) {
boolean
useSameName = false; // true if standard and daylight time use the same abbreviation.
TimeZone currentTimeZone =
getTimeZone();
// At this point, check for named time zones by looking through
// the locale data from the TimeZoneNames strings.
// Want to be able to parse both short and long forms.
int
zoneIndex =
formatData.
getZoneIndex(
currentTimeZone.
getID());
TimeZone tz = null;
String[][]
zoneStrings =
formatData.
getZoneStringsWrapper();
String[]
zoneNames = null;
int
nameIndex = 0;
if (
zoneIndex != -1) {
zoneNames =
zoneStrings[
zoneIndex];
if ((
nameIndex =
matchZoneString(
text,
start,
zoneNames)) > 0) {
if (
nameIndex <= 2) {
// Check if the standard name (abbr) and the daylight name are the same.
useSameName =
zoneNames[
nameIndex].
equalsIgnoreCase(
zoneNames[
nameIndex + 2]);
}
tz =
TimeZone.
getTimeZone(
zoneNames[0]);
}
}
if (
tz == null) {
zoneIndex =
formatData.
getZoneIndex(
TimeZone.
getDefault().
getID());
if (
zoneIndex != -1) {
zoneNames =
zoneStrings[
zoneIndex];
if ((
nameIndex =
matchZoneString(
text,
start,
zoneNames)) > 0) {
if (
nameIndex <= 2) {
useSameName =
zoneNames[
nameIndex].
equalsIgnoreCase(
zoneNames[
nameIndex + 2]);
}
tz =
TimeZone.
getTimeZone(
zoneNames[0]);
}
}
}
if (
tz == null) {
int
len =
zoneStrings.length;
for (int
i = 0;
i <
len;
i++) {
zoneNames =
zoneStrings[
i];
if ((
nameIndex =
matchZoneString(
text,
start,
zoneNames)) > 0) {
if (
nameIndex <= 2) {
useSameName =
zoneNames[
nameIndex].
equalsIgnoreCase(
zoneNames[
nameIndex + 2]);
}
tz =
TimeZone.
getTimeZone(
zoneNames[0]);
break;
}
}
}
if (
tz != null) { // Matched any ?
if (!
tz.
equals(
currentTimeZone)) {
setTimeZone(
tz);
}
// If the time zone matched uses the same name
// (abbreviation) for both standard and daylight time,
// let the time zone in the Calendar decide which one.
//
// Also if tz.getDSTSaving() returns 0 for DST, use tz to
// determine the local time. (6645292)
int
dstAmount = (
nameIndex >= 3) ?
tz.
getDSTSavings() : 0;
if (!(
useSameName || (
nameIndex >= 3 &&
dstAmount == 0))) {
calb.
clear(
Calendar.
ZONE_OFFSET).
set(
Calendar.
DST_OFFSET,
dstAmount);
}
return (
start +
zoneNames[
nameIndex].
length());
}
return -
start;
}
/**
* Parses numeric forms of time zone offset, such as "hh:mm", and
* sets calb to the parsed value.
*
* @param text the text to be parsed
* @param start the character position to start parsing
* @param sign 1: positive; -1: negative
* @param count 0: 'Z' or "GMT+hh:mm" parsing; 1 - 3: the number of 'X's
* @param colon true - colon required between hh and mm; false - no colon required
* @param calb a CalendarBuilder in which the parsed value is stored
* @return updated parsed position, or its negative value to indicate a parsing error
*/
private int
subParseNumericZone(
String text, int
start, int
sign, int
count,
boolean
colon,
CalendarBuilder calb) {
int
index =
start;
parse:
try {
char
c =
text.
charAt(
index++);
// Parse hh
int
hours;
if (!
isDigit(
c)) {
break
parse;
}
hours =
c - '0';
c =
text.
charAt(
index++);
if (
isDigit(
c)) {
hours =
hours * 10 + (
c - '0');
} else {
// If no colon in RFC 822 or 'X' (ISO), two digits are
// required.
if (
count > 0 || !
colon) {
break
parse;
}
--
index;
}
if (
hours > 23) {
break
parse;
}
int
minutes = 0;
if (
count != 1) {
// Proceed with parsing mm
c =
text.
charAt(
index++);
if (
colon) {
if (
c != ':') {
break
parse;
}
c =
text.
charAt(
index++);
}
if (!
isDigit(
c)) {
break
parse;
}
minutes =
c - '0';
c =
text.
charAt(
index++);
if (!
isDigit(
c)) {
break
parse;
}
minutes =
minutes * 10 + (
c - '0');
if (
minutes > 59) {
break
parse;
}
}
minutes +=
hours * 60;
calb.
set(
Calendar.
ZONE_OFFSET,
minutes *
MILLIS_PER_MINUTE *
sign)
.
set(
Calendar.
DST_OFFSET, 0);
return
index;
} catch (
IndexOutOfBoundsException e) {
}
return 1 -
index; // -(index - 1)
}
private boolean
isDigit(char
c) {
return
c >= '0' &&
c <= '9';
}
/**
* Private member function that converts the parsed date strings into
* timeFields. Returns -start (for ParsePosition) if failed.
* @param text the time text to be parsed.
* @param start where to start parsing.
* @param patternCharIndex the index of the pattern character.
* @param count the count of a pattern character.
* @param obeyCount if true, then the next field directly abuts this one,
* and we should use the count to know when to stop parsing.
* @param ambiguousYear return parameter; upon return, if ambiguousYear[0]
* is true, then a two-digit year was parsed and may need to be readjusted.
* @param origPos origPos.errorIndex is used to return an error index
* at which a parse error occurred, if matching failure occurs.
* @return the new start position if matching succeeded; -1 indicating
* matching failure, otherwise. In case matching failure occurred,
* an error index is set to origPos.errorIndex.
*/
private int
subParse(
String text, int
start, int
patternCharIndex, int
count,
boolean
obeyCount, boolean[]
ambiguousYear,
ParsePosition origPos,
boolean
useFollowingMinusSignAsDelimiter,
CalendarBuilder calb) {
Number number;
int
value = 0;
ParsePosition pos = new
ParsePosition(0);
pos.
index =
start;
if (
patternCharIndex ==
PATTERN_WEEK_YEAR && !
calendar.
isWeekDateSupported()) {
// use calendar year 'y' instead
patternCharIndex =
PATTERN_YEAR;
}
int
field =
PATTERN_INDEX_TO_CALENDAR_FIELD[
patternCharIndex];
// If there are any spaces here, skip over them. If we hit the end
// of the string, then fail.
for (;;) {
if (
pos.
index >=
text.
length()) {
origPos.
errorIndex =
start;
return -1;
}
char
c =
text.
charAt(
pos.
index);
if (
c != ' ' &&
c != '\t') {
break;
}
++
pos.
index;
}
// Remember the actual start index
int
actualStart =
pos.
index;
parsing:
{
// We handle a few special cases here where we need to parse
// a number value. We handle further, more generic cases below. We need
// to handle some of them here because some fields require extra processing on
// the parsed value.
if (
patternCharIndex ==
PATTERN_HOUR_OF_DAY1 ||
patternCharIndex ==
PATTERN_HOUR1 ||
(
patternCharIndex ==
PATTERN_MONTH &&
count <= 2) ||
patternCharIndex ==
PATTERN_YEAR ||
patternCharIndex ==
PATTERN_WEEK_YEAR) {
// It would be good to unify this with the obeyCount logic below,
// but that's going to be difficult.
if (
obeyCount) {
if ((
start+
count) >
text.
length()) {
break
parsing;
}
number =
numberFormat.
parse(
text.
substring(0,
start+
count),
pos);
} else {
number =
numberFormat.
parse(
text,
pos);
}
if (
number == null) {
if (
patternCharIndex !=
PATTERN_YEAR ||
calendar instanceof
GregorianCalendar) {
break
parsing;
}
} else {
value =
number.
intValue();
if (
useFollowingMinusSignAsDelimiter && (
value < 0) &&
(((
pos.
index <
text.
length()) &&
(
text.
charAt(
pos.
index) !=
minusSign)) ||
((
pos.
index ==
text.
length()) &&
(
text.
charAt(
pos.
index-1) ==
minusSign)))) {
value = -
value;
pos.
index--;
}
}
}
boolean
useDateFormatSymbols =
useDateFormatSymbols();
int
index;
switch (
patternCharIndex) {
case
PATTERN_ERA: // 'G'
if (
useDateFormatSymbols) {
if ((
index =
matchString(
text,
start,
Calendar.
ERA,
formatData.
getEras(),
calb)) > 0) {
return
index;
}
} else {
Map<
String,
Integer>
map =
getDisplayNamesMap(
field,
locale);
if ((
index =
matchString(
text,
start,
field,
map,
calb)) > 0) {
return
index;
}
}
break
parsing;
case
PATTERN_WEEK_YEAR: // 'Y'
case
PATTERN_YEAR: // 'y'
if (!(
calendar instanceof
GregorianCalendar)) {
// calendar might have text representations for year values,
// such as "\u5143" in JapaneseImperialCalendar.
int
style = (
count >= 4) ?
Calendar.
LONG :
Calendar.
SHORT;
Map<
String,
Integer>
map =
calendar.
getDisplayNames(
field,
style,
locale);
if (
map != null) {
if ((
index =
matchString(
text,
start,
field,
map,
calb)) > 0) {
return
index;
}
}
calb.
set(
field,
value);
return
pos.
index;
}
// If there are 3 or more YEAR pattern characters, this indicates
// that the year value is to be treated literally, without any
// two-digit year adjustments (e.g., from "01" to 2001). Otherwise
// we made adjustments to place the 2-digit year in the proper
// century, for parsed strings from "00" to "99". Any other string
// is treated literally: "2250", "-1", "1", "002".
if (
count <= 2 && (
pos.
index -
actualStart) == 2
&&
Character.
isDigit(
text.
charAt(
actualStart))
&&
Character.
isDigit(
text.
charAt(
actualStart + 1))) {
// Assume for example that the defaultCenturyStart is 6/18/1903.
// This means that two-digit years will be forced into the range
// 6/18/1903 to 6/17/2003. As a result, years 00, 01, and 02
// correspond to 2000, 2001, and 2002. Years 04, 05, etc. correspond
// to 1904, 1905, etc. If the year is 03, then it is 2003 if the
// other fields specify a date before 6/18, or 1903 if they specify a
// date afterwards. As a result, 03 is an ambiguous year. All other
// two-digit years are unambiguous.
int
ambiguousTwoDigitYear =
defaultCenturyStartYear % 100;
ambiguousYear[0] =
value ==
ambiguousTwoDigitYear;
value += (
defaultCenturyStartYear/100)*100 +
(
value <
ambiguousTwoDigitYear ? 100 : 0);
}
calb.
set(
field,
value);
return
pos.
index;
case
PATTERN_MONTH: // 'M'
if (
count <= 2) // i.e., M or MM.
{
// Don't want to parse the month if it is a string
// while pattern uses numeric style: M or MM.
// [We computed 'value' above.]
calb.
set(
Calendar.
MONTH,
value - 1);
return
pos.
index;
}
if (
useDateFormatSymbols) {
// count >= 3 // i.e., MMM or MMMM
// Want to be able to parse both short and long forms.
// Try count == 4 first:
int
newStart;
if ((
newStart =
matchString(
text,
start,
Calendar.
MONTH,
formatData.
getMonths(),
calb)) > 0) {
return
newStart;
}
// count == 4 failed, now try count == 3
if ((
index =
matchString(
text,
start,
Calendar.
MONTH,
formatData.
getShortMonths(),
calb)) > 0) {
return
index;
}
} else {
Map<
String,
Integer>
map =
getDisplayNamesMap(
field,
locale);
if ((
index =
matchString(
text,
start,
field,
map,
calb)) > 0) {
return
index;
}
}
break
parsing;
case
PATTERN_HOUR_OF_DAY1: // 'k' 1-based. eg, 23:59 + 1 hour =>> 24:59
if (!
isLenient()) {
// Validate the hour value in non-lenient
if (
value < 1 ||
value > 24) {
break
parsing;
}
}
// [We computed 'value' above.]
if (
value ==
calendar.
getMaximum(
Calendar.
HOUR_OF_DAY) + 1) {
value = 0;
}
calb.
set(
Calendar.
HOUR_OF_DAY,
value);
return
pos.
index;
case
PATTERN_DAY_OF_WEEK: // 'E'
{
if (
useDateFormatSymbols) {
// Want to be able to parse both short and long forms.
// Try count == 4 (DDDD) first:
int
newStart;
if ((
newStart=
matchString(
text,
start,
Calendar.
DAY_OF_WEEK,
formatData.
getWeekdays(),
calb)) > 0) {
return
newStart;
}
// DDDD failed, now try DDD
if ((
index =
matchString(
text,
start,
Calendar.
DAY_OF_WEEK,
formatData.
getShortWeekdays(),
calb)) > 0) {
return
index;
}
} else {
int[]
styles = {
Calendar.
LONG,
Calendar.
SHORT };
for (int
style :
styles) {
Map<
String,
Integer>
map =
calendar.
getDisplayNames(
field,
style,
locale);
if ((
index =
matchString(
text,
start,
field,
map,
calb)) > 0) {
return
index;
}
}
}
}
break
parsing;
case
PATTERN_AM_PM: // 'a'
if (
useDateFormatSymbols) {
if ((
index =
matchString(
text,
start,
Calendar.
AM_PM,
formatData.
getAmPmStrings(),
calb)) > 0) {
return
index;
}
} else {
Map<
String,
Integer>
map =
getDisplayNamesMap(
field,
locale);
if ((
index =
matchString(
text,
start,
field,
map,
calb)) > 0) {
return
index;
}
}
break
parsing;
case
PATTERN_HOUR1: // 'h' 1-based. eg, 11PM + 1 hour =>> 12 AM
if (!
isLenient()) {
// Validate the hour value in non-lenient
if (
value < 1 ||
value > 12) {
break
parsing;
}
}
// [We computed 'value' above.]
if (
value ==
calendar.
getLeastMaximum(
Calendar.
HOUR) + 1) {
value = 0;
}
calb.
set(
Calendar.
HOUR,
value);
return
pos.
index;
case
PATTERN_ZONE_NAME: // 'z'
case
PATTERN_ZONE_VALUE: // 'Z'
{
int
sign = 0;
try {
char
c =
text.
charAt(
pos.
index);
if (
c == '+') {
sign = 1;
} else if (
c == '-') {
sign = -1;
}
if (
sign == 0) {
// Try parsing a custom time zone "GMT+hh:mm" or "GMT".
if ((
c == 'G' ||
c == 'g')
&& (
text.
length() -
start) >=
GMT.
length()
&&
text.
regionMatches(true,
start,
GMT, 0,
GMT.
length())) {
pos.
index =
start +
GMT.
length();
if ((
text.
length() -
pos.
index) > 0) {
c =
text.
charAt(
pos.
index);
if (
c == '+') {
sign = 1;
} else if (
c == '-') {
sign = -1;
}
}
if (
sign == 0) { /* "GMT" without offset */
calb.
set(
Calendar.
ZONE_OFFSET, 0)
.
set(
Calendar.
DST_OFFSET, 0);
return
pos.
index;
}
// Parse the rest as "hh:mm"
int
i =
subParseNumericZone(
text, ++
pos.
index,
sign, 0, true,
calb);
if (
i > 0) {
return
i;
}
pos.
index = -
i;
} else {
// Try parsing the text as a time zone
// name or abbreviation.
int
i =
subParseZoneString(
text,
pos.
index,
calb);
if (
i > 0) {
return
i;
}
pos.
index = -
i;
}
} else {
// Parse the rest as "hhmm" (RFC 822)
int
i =
subParseNumericZone(
text, ++
pos.
index,
sign, 0, false,
calb);
if (
i > 0) {
return
i;
}
pos.
index = -
i;
}
} catch (
IndexOutOfBoundsException e) {
}
}
break
parsing;
case
PATTERN_ISO_ZONE: // 'X'
{
if ((
text.
length() -
pos.
index) <= 0) {
break
parsing;
}
int
sign;
char
c =
text.
charAt(
pos.
index);
if (
c == 'Z') {
calb.
set(
Calendar.
ZONE_OFFSET, 0).
set(
Calendar.
DST_OFFSET, 0);
return ++
pos.
index;
}
// parse text as "+/-hh[[:]mm]" based on count
if (
c == '+') {
sign = 1;
} else if (
c == '-') {
sign = -1;
} else {
++
pos.
index;
break
parsing;
}
int
i =
subParseNumericZone(
text, ++
pos.
index,
sign,
count,
count == 3,
calb);
if (
i > 0) {
return
i;
}
pos.
index = -
i;
}
break
parsing;
default:
// case PATTERN_DAY_OF_MONTH: // 'd'
// case PATTERN_HOUR_OF_DAY0: // 'H' 0-based. eg, 23:59 + 1 hour =>> 00:59
// case PATTERN_MINUTE: // 'm'
// case PATTERN_SECOND: // 's'
// case PATTERN_MILLISECOND: // 'S'
// case PATTERN_DAY_OF_YEAR: // 'D'
// case PATTERN_DAY_OF_WEEK_IN_MONTH: // 'F'
// case PATTERN_WEEK_OF_YEAR: // 'w'
// case PATTERN_WEEK_OF_MONTH: // 'W'
// case PATTERN_HOUR0: // 'K' 0-based. eg, 11PM + 1 hour =>> 0 AM
// case PATTERN_ISO_DAY_OF_WEEK: // 'u' (pseudo field);
// Handle "generic" fields
if (
obeyCount) {
if ((
start+
count) >
text.
length()) {
break
parsing;
}
number =
numberFormat.
parse(
text.
substring(0,
start+
count),
pos);
} else {
number =
numberFormat.
parse(
text,
pos);
}
if (
number != null) {
value =
number.
intValue();
if (
useFollowingMinusSignAsDelimiter && (
value < 0) &&
(((
pos.
index <
text.
length()) &&
(
text.
charAt(
pos.
index) !=
minusSign)) ||
((
pos.
index ==
text.
length()) &&
(
text.
charAt(
pos.
index-1) ==
minusSign)))) {
value = -
value;
pos.
index--;
}
calb.
set(
field,
value);
return
pos.
index;
}
break
parsing;
}
}
// Parsing failed.
origPos.
errorIndex =
pos.
index;
return -1;
}
/**
* Returns true if the DateFormatSymbols has been set explicitly or locale
* is null.
*/
private boolean
useDateFormatSymbols() {
return
useDateFormatSymbols ||
locale == null;
}
/**
* Translates a pattern, mapping each character in the from string to the
* corresponding character in the to string.
*
* @exception IllegalArgumentException if the given pattern is invalid
*/
private
String translatePattern(
String pattern,
String from,
String to) {
StringBuilder result = new
StringBuilder();
boolean
inQuote = false;
for (int
i = 0;
i <
pattern.
length(); ++
i) {
char
c =
pattern.
charAt(
i);
if (
inQuote) {
if (
c == '\'') {
inQuote = false;
}
}
else {
if (
c == '\'') {
inQuote = true;
} else if ((
c >= 'a' &&
c <= 'z') || (
c >= 'A' &&
c <= 'Z')) {
int
ci =
from.
indexOf(
c);
if (
ci >= 0) {
// patternChars is longer than localPatternChars due
// to serialization compatibility. The pattern letters
// unsupported by localPatternChars pass through.
if (
ci <
to.
length()) {
c =
to.
charAt(
ci);
}
} else {
throw new
IllegalArgumentException("Illegal pattern " +
" character '" +
c + "'");
}
}
}
result.
append(
c);
}
if (
inQuote) {
throw new
IllegalArgumentException("Unfinished quote in pattern");
}
return
result.
toString();
}
/**
* Returns a pattern string describing this date format.
*
* @return a pattern string describing this date format.
*/
public
String toPattern() {
return
pattern;
}
/**
* Returns a localized pattern string describing this date format.
*
* @return a localized pattern string describing this date format.
*/
public
String toLocalizedPattern() {
return
translatePattern(
pattern,
DateFormatSymbols.
patternChars,
formatData.
getLocalPatternChars());
}
/**
* Applies the given pattern string to this date format.
*
* @param pattern the new date and time pattern for this date format
* @exception NullPointerException if the given pattern is null
* @exception IllegalArgumentException if the given pattern is invalid
*/
public void
applyPattern(
String pattern)
{
applyPatternImpl(
pattern);
}
private void
applyPatternImpl(
String pattern) {
compiledPattern =
compile(
pattern);
this.
pattern =
pattern;
}
/**
* Applies the given localized pattern string to this date format.
*
* @param pattern a String to be mapped to the new date and time format
* pattern for this format
* @exception NullPointerException if the given pattern is null
* @exception IllegalArgumentException if the given pattern is invalid
*/
public void
applyLocalizedPattern(
String pattern) {
String p =
translatePattern(
pattern,
formatData.
getLocalPatternChars(),
DateFormatSymbols.
patternChars);
compiledPattern =
compile(
p);
this.
pattern =
p;
}
/**
* Gets a copy of the date and time format symbols of this date format.
*
* @return the date and time format symbols of this date format
* @see #setDateFormatSymbols
*/
public
DateFormatSymbols getDateFormatSymbols()
{
return (
DateFormatSymbols)
formatData.
clone();
}
/**
* Sets the date and time format symbols of this date format.
*
* @param newFormatSymbols the new date and time format symbols
* @exception NullPointerException if the given newFormatSymbols is null
* @see #getDateFormatSymbols
*/
public void
setDateFormatSymbols(
DateFormatSymbols newFormatSymbols)
{
this.
formatData = (
DateFormatSymbols)
newFormatSymbols.
clone();
useDateFormatSymbols = true;
}
/**
* Creates a copy of this <code>SimpleDateFormat</code>. This also
* clones the format's date format symbols.
*
* @return a clone of this <code>SimpleDateFormat</code>
*/
@
Override
public
Object clone() {
SimpleDateFormat other = (
SimpleDateFormat) super.clone();
other.
formatData = (
DateFormatSymbols)
formatData.
clone();
return
other;
}
/**
* Returns the hash code value for this <code>SimpleDateFormat</code> object.
*
* @return the hash code value for this <code>SimpleDateFormat</code> object.
*/
@
Override
public int
hashCode()
{
return
pattern.
hashCode();
// just enough fields for a reasonable distribution
}
/**
* Compares the given object with this <code>SimpleDateFormat</code> for
* equality.
*
* @return true if the given object is equal to this
* <code>SimpleDateFormat</code>
*/
@
Override
public boolean
equals(
Object obj)
{
if (!super.equals(
obj)) {
return false; // super does class check
}
SimpleDateFormat that = (
SimpleDateFormat)
obj;
return (
pattern.
equals(
that.
pattern)
&&
formatData.
equals(
that.
formatData));
}
private static final int[]
REST_OF_STYLES = {
Calendar.
SHORT_STANDALONE,
Calendar.
LONG_FORMAT,
Calendar.
LONG_STANDALONE,
};
private
Map<
String,
Integer>
getDisplayNamesMap(int
field,
Locale locale) {
Map<
String,
Integer>
map =
calendar.
getDisplayNames(
field,
Calendar.
SHORT_FORMAT,
locale);
// Get all SHORT and LONG styles (avoid NARROW styles).
for (int
style :
REST_OF_STYLES) {
Map<
String,
Integer>
m =
calendar.
getDisplayNames(
field,
style,
locale);
if (
m != null) {
map.
putAll(
m);
}
}
return
map;
}
/**
* After reading an object from the input stream, the format
* pattern in the object is verified.
* <p>
* @exception InvalidObjectException if the pattern is invalid
*/
private void
readObject(
ObjectInputStream stream)
throws
IOException,
ClassNotFoundException {
stream.
defaultReadObject();
try {
compiledPattern =
compile(
pattern);
} catch (
Exception e) {
throw new
InvalidObjectException("invalid pattern");
}
if (
serialVersionOnStream < 1) {
// didn't have defaultCenturyStart field
initializeDefaultCentury();
}
else {
// fill in dependent transient field
parseAmbiguousDatesAsAfter(
defaultCenturyStart);
}
serialVersionOnStream =
currentSerialVersion;
// If the deserialized object has a SimpleTimeZone, try
// to replace it with a ZoneInfo equivalent in order to
// be compatible with the SimpleTimeZone-based
// implementation as much as possible.
TimeZone tz =
getTimeZone();
if (
tz instanceof
SimpleTimeZone) {
String id =
tz.
getID();
TimeZone zi =
TimeZone.
getTimeZone(
id);
if (
zi != null &&
zi.
hasSameRules(
tz) &&
zi.
getID().
equals(
id)) {
setTimeZone(
zi);
}
}
}
/**
* Analyze the negative subpattern of DecimalFormat and set/update values
* as necessary.
*/
private void
checkNegativeNumberExpression() {
if ((
numberFormat instanceof
DecimalFormat) &&
!
numberFormat.
equals(
originalNumberFormat)) {
String numberPattern = ((
DecimalFormat)
numberFormat).
toPattern();
if (!
numberPattern.
equals(
originalNumberPattern)) {
hasFollowingMinusSign = false;
int
separatorIndex =
numberPattern.
indexOf(';');
// If the negative subpattern is not absent, we have to analayze
// it in order to check if it has a following minus sign.
if (
separatorIndex > -1) {
int
minusIndex =
numberPattern.
indexOf('-',
separatorIndex);
if ((
minusIndex >
numberPattern.
lastIndexOf('0')) &&
(
minusIndex >
numberPattern.
lastIndexOf('#'))) {
hasFollowingMinusSign = true;
minusSign = ((
DecimalFormat)
numberFormat).
getDecimalFormatSymbols().
getMinusSign();
}
}
originalNumberPattern =
numberPattern;
}
originalNumberFormat =
numberFormat;
}
}
}