/*
* @(#)SimpleDateFormat.java 1.77 04/01/22
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN 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.util.TimeZone;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.ResourceBundle;
import java.util.SimpleTimeZone;
import java.util.GregorianCalendar;
import java.io.ObjectInputStream;
import java.io.InvalidObjectException;
import java.io.IOException;
import java.lang.ClassNotFoundException;
import java.util.Hashtable;
import java.lang.StringIndexOutOfBoundsException;
import sun.text.resources.LocaleData;
import sun.util.calendar.CalendarUtils;
import sun.util.calendar.ZoneInfoFile;
/**
* <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}.
*
* <h4>Date and Time Patterns</h4>
* <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 bgcolor="#ccccff">
* <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 bgcolor="#eeeeff">
* <td><code>y</code>
* <td>Year
* <td><a href="#year">Year</a>
* <td><code>1996</code>; <code>96</code>
* <tr>
* <td><code>M</code>
* <td>Month in year
* <td><a href="#month">Month</a>
* <td><code>July</code>; <code>Jul</code>; <code>07</code>
* <tr bgcolor="#eeeeff">
* <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 bgcolor="#eeeeff">
* <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 bgcolor="#eeeeff">
* <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 in week
* <td><a href="#text">Text</a>
* <td><code>Tuesday</code>; <code>Tue</code>
* <tr bgcolor="#eeeeff">
* <td><code>a</code>
* <td>Am/pm marker
* <td><a href="#text">Text</a>
* <td><code>PM</code>
* <tr>
* <td><code>H</code>
* <td>Hour in day (0-23)
* <td><a href="#number">Number</a>
* <td><code>0</code>
* <tr bgcolor="#eeeeff">
* <td><code>k</code>
* <td>Hour in day (1-24)
* <td><a href="#number">Number</a>
* <td><code>24</code>
* <tr>
* <td><code>K</code>
* <td>Hour in am/pm (0-11)
* <td><a href="#number">Number</a>
* <td><code>0</code>
* <tr bgcolor="#eeeeff">
* <td><code>h</code>
* <td>Hour in am/pm (1-12)
* <td><a href="#number">Number</a>
* <td><code>12</code>
* <tr>
* <td><code>m</code>
* <td>Minute in hour
* <td><a href="#number">Number</a>
* <td><code>30</code>
* <tr bgcolor="#eeeeff">
* <td><code>s</code>
* <td>Second in minute
* <td><a href="#number">Number</a>
* <td><code>55</code>
* <tr>
* <td><code>S</code>
* <td>Millisecond
* <td><a href="#number">Number</a>
* <td><code>978</code>
* <tr bgcolor="#eeeeff">
* <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>
* <td><code>Z</code>
* <td>Time zone
* <td><a href="#rfc822timezone">RFC 822 time zone</a>
* <td><code>-0800</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.
* <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.
* <li><strong><a name="year">Year:</a></strong>
* 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>.
* <p>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.
* <p>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.
* <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>.
* <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.
* <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.
* </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.
* <p>
*
* <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 bgcolor="#ccccff">
* <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 bgcolor="#eeeeff">
* <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 bgcolor="#eeeeff">
* <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 bgcolor="#eeeeff">
* <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 bgcolor="#eeeeff">
* <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>
* </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="http://java.sun.com/docs/books/tutorial/i18n/format/simpleDateFormat.html">Java Tutorial</a>
* @see java.util.Calendar
* @see java.util.TimeZone
* @see DateFormat
* @see DateFormatSymbols
* @version 1.77, 01/22/04
* @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;
/**
* 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 millisPerHour = 60 * 60 * 1000;
private static final int millisPerMinute = 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 to hold the DateTimePatterns of a Locale.
*/
private static Hashtable cachedLocaleData = new Hashtable(3);
/**
* Cache NumberFormat instances with Locale key.
*/
private static Hashtable cachedNumberFormatData = new Hashtable(3);
/**
* Constructs a <code>SimpleDateFormat</code> using the default pattern and
* date format symbols for the default 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(SHORT, SHORT, Locale.getDefault());
}
/**
* Constructs a <code>SimpleDateFormat</code> using the given pattern and
* the default date format symbols for the default 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
* @exception NullPointerException if the given pattern is null
* @exception IllegalArgumentException if the given pattern is invalid
*/
public SimpleDateFormat(String pattern)
{
this(pattern, Locale.getDefault());
}
/**
* 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 is null
* @exception IllegalArgumentException if the given pattern is invalid
*/
public SimpleDateFormat(String pattern, Locale locale)
{
this.pattern = pattern;
this.formatData = new DateFormatSymbols(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)
{
this.pattern = pattern;
this.formatData = (DateFormatSymbols) formatSymbols.clone();
initialize(Locale.getDefault());
}
/* Package-private, called by DateFormat factory methods */
SimpleDateFormat(int timeStyle, int dateStyle, Locale loc) {
/* try the cache first */
String[] dateTimePatterns = (String[]) cachedLocaleData.get(loc);
if (dateTimePatterns == null) { /* cache miss */
ResourceBundle r = LocaleData.getLocaleElements(loc);
dateTimePatterns = r.getStringArray("DateTimePatterns");
/* update cache */
cachedLocaleData.put(loc, dateTimePatterns);
}
formatData = new DateFormatSymbols(loc);
if ((timeStyle >= 0) && (dateStyle >= 0)) {
Object[] dateTimeArgs = {dateTimePatterns[timeStyle],
dateTimePatterns[dateStyle + 4]};
pattern = MessageFormat.format(dateTimePatterns[8], dateTimeArgs);
}
else if (timeStyle >= 0) {
pattern = dateTimePatterns[timeStyle];
}
else if (dateStyle >= 0) {
pattern = dateTimePatterns[dateStyle + 4];
}
else {
throw new IllegalArgumentException("No date or time style specified");
}
initialize(loc);
}
/* Initialize calendar and numberFormat fields */
private void initialize(Locale loc) {
// Verify and compile the given pattern.
compiledPattern = compile(pattern);
// 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);
/* try the cache first */
numberFormat = (NumberFormat) cachedNumberFormatData.get(loc);
if (numberFormat == null) { /* cache miss */
numberFormat = NumberFormat.getIntegerInstance(loc);
numberFormat.setGroupingUsed(false);
/* update cache */
cachedNumberFormatData.put(loc, numberFormat);
}
numberFormat = (NumberFormat) numberFormat.clone();
initializeDefaultCentury();
}
/**
* 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 compiledPattern = new StringBuilder(length * 2);
StringBuilder tmpBuffer = null;
int count = 0;
int lastTag = -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, compiledPattern);
lastTag = -1;
count = 0;
}
if (inQuote) {
tmpBuffer.append(c);
} else {
compiledPattern.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | c));
}
continue;
}
}
if (!inQuote) {
if (count != 0) {
encode(lastTag, count, compiledPattern);
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) {
compiledPattern.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | ch));
} else {
compiledPattern.append((char)(TAG_QUOTE_CHARS << 8 | 1));
compiledPattern.append(ch);
}
} else {
encode(TAG_QUOTE_CHARS, len, compiledPattern);
compiledPattern.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, compiledPattern);
lastTag = -1;
count = 0;
}
if (c < 128) {
// In most cases, c would be a delimiter, such as ':'.
compiledPattern.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;
}
}
compiledPattern.append((char)(TAG_QUOTE_CHARS << 8 | (j - i)));
for (; i < j; i++) {
compiledPattern.append(pattern.charAt(i));
}
i--;
}
continue;
}
int tag;
if ((tag = formatData.patternChars.indexOf(c)) == -1) {
throw new IllegalArgumentException("Illegal pattern character " +
"'" + c + "'");
}
if (lastTag == -1 || lastTag == tag) {
lastTag = tag;
count++;
continue;
}
encode(lastTag, count, compiledPattern);
lastTag = tag;
count = 1;
}
if (inQuote) {
throw new IllegalArgumentException("Unterminated quote");
}
if (count != 0) {
encode(lastTag, count, compiledPattern);
}
// Copy the compiled pattern to a char array
int len = compiledPattern.length();
char[] r = new char[len];
compiledPattern.getChars(0, len, r, 0);
return r;
}
/**
* Encodes the given tag and length and puts encoded char(s) into buffer.
*/
private static final void encode(int tag, int length, StringBuilder buffer) {
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.setTime( new Date() );
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(startDate);
}
/**
* 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 defaultCenturyStart;
}
/**
* 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 date is null
*/
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);
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);
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
*/
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
};
// 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,
};
// 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,
};
/**
* Private member function that does the real date/time formatting.
*/
private void subFormat(int patternCharIndex, int count,
FieldDelegate delegate, StringBuffer buffer)
{
int maxIntCount = Integer.MAX_VALUE;
String current = null;
int beginOffset = buffer.length();
int field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex];
int value = calendar.get(field);
// Note: zeroPaddingNumber() assumes that maxDigits is either
// 2 or maxIntCount. If we make any changes to this,
// zeroPaddingNumber() must be fixed.
switch (patternCharIndex) {
case 0: // 'G' - ERA
current = formatData.eras[value];
break;
case 1: // 'y' - YEAR
if (count >= 4)
zeroPaddingNumber(value, count, maxIntCount, buffer);
else // count < 4
zeroPaddingNumber(value, 2, 2, buffer); // clip 1996 to 96
break;
case 2: // 'M' - MONTH
if (count >= 4)
current = formatData.months[value];
else if (count == 3)
current = formatData.shortMonths[value];
else
zeroPaddingNumber(value+1, count, maxIntCount, buffer);
break;
case 4: // 'k' - HOUR_OF_DAY: 1-based. eg, 23:59 + 1 hour =>> 24:59
if (value == 0)
zeroPaddingNumber(calendar.getMaximum(Calendar.HOUR_OF_DAY)+1,
count, maxIntCount, buffer);
else
zeroPaddingNumber(value, count, maxIntCount, buffer);
break;
case 9: // 'E' - DAY_OF_WEEK
if (count >= 4)
current = formatData.weekdays[value];
else // count < 4, use abbreviated form if exists
current = formatData.shortWeekdays[value];
break;
case 14: // 'a' - AM_PM
current = formatData.ampms[value];
break;
case 15: // 'h' - HOUR:1-based. eg, 11PM + 1 hour =>> 12 AM
if (value == 0)
zeroPaddingNumber(calendar.getLeastMaximum(Calendar.HOUR)+1,
count, maxIntCount, buffer);
else
zeroPaddingNumber(value, count, maxIntCount, buffer);
break;
case 17: // 'z' - ZONE_OFFSET
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++;
}
buffer.append(formatData.zoneStrings[zoneIndex][index]);
}
break;
case 18: // 'Z' - ZONE_OFFSET ("-/+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;
default:
// case 3: // 'd' - DATE
// case 5: // 'H' - HOUR_OF_DAY:0-based. eg, 23:59 + 1 hour =>> 00:59
// case 6: // 'm' - MINUTE
// case 7: // 's' - SECOND
// case 8: // 'S' - MILLISECOND
// case 10: // 'D' - DAY_OF_YEAR
// case 11: // 'F' - DAY_OF_WEEK_IN_MONTH
// case 12: // 'w' - WEEK_OF_YEAR
// case 13: // 'W' - WEEK_OF_MONTH
// case 16: // 'K' - HOUR: 0-based. eg, 11PM + 1 hour =>> 0 AM
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 final 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.
*
* @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.
*/
public Date parse(String text, ParsePosition pos)
{
int start = pos.index;
int oldStart = start;
int textLength = text.length();
boolean[] ambiguousYear = {false};
calendar.clear(); // Clears all the time fields
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;
if (i < compiledPattern.length) {
int nextTag = compiledPattern[i] >>> 8;
if (!(nextTag == TAG_QUOTE_ASCII_CHAR || nextTag == TAG_QUOTE_CHARS)) {
obeyCount = true;
}
}
start = subParse(text, start, tag, count, obeyCount,
ambiguousYear, pos);
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;
// This part is a problem: When we call parsedDate.after, we compute the time.
// Take the date April 3 2004 at 2:30 am. When this is first set up, the year
// will be wrong if we're parsing a 2-digit year pattern. It will be 1904.
// April 3 1904 is a Sunday (unlike 2004) so it is the DST onset day. 2:30 am
// is therefore an "impossible" time, since the time goes from 1:59 to 3:00 am
// on that day. It is therefore parsed out to fields as 3:30 am. Then we
// add 100 years, and get April 3 2004 at 3:30 am. Note that April 3 2004 is
// a Saturday, so it can have a 2:30 am -- and it should. [LIU]
/*
Date parsedDate = calendar.getTime();
if( ambiguousYear[0] && !parsedDate.after(defaultCenturyStart) ) {
calendar.add(Calendar.YEAR, 100);
parsedDate = calendar.getTime();
}
*/
// Because of the above condition, save off the fields in case we need to readjust.
// The procedure we use here is not particularly efficient, but there is no other
// way to do this given the API restrictions present in Calendar. We minimize
// inefficiency by only performing this computation when it might apply, that is,
// when the two-digit year is equal to the start year, and thus might fall at the
// front or the back of the default century. This only works because we adjust
// the year correctly to start with in other cases -- see subParse().
Date parsedDate;
try {
if (ambiguousYear[0]) // If this is true then the two-digit year == the default start year
{
// We need a copy of the fields, and we need to avoid triggering a call to
// complete(), which will recalculate the fields. Since we can't access
// the fields[] array in Calendar, we clone the entire object. This will
// stop working if Calendar.clone() is ever rewritten to call complete().
Calendar savedCalendar = (Calendar)calendar.clone();
parsedDate = calendar.getTime();
if (parsedDate.before(defaultCenturyStart))
{
// We can't use add here because that does a complete() first.
savedCalendar.set(Calendar.YEAR, defaultCenturyStartYear + 100);
parsedDate = savedCalendar.getTime();
}
}
else parsedDate = 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)
{
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)
{
calendar.set(field, bestMatch);
return start + bestMatchLength;
}
return -start;
}
private int matchZoneString(String text, int start, int zoneIndex) {
for (int j = 1; j <= 4; ++j) {
// Checking long and short zones [1 & 2],
// and long and short daylight [3 & 4].
String zoneName = formatData.zoneStrings[zoneIndex][j];
if (text.regionMatches(true, start,
zoneName, 0, zoneName.length())) {
return j;
}
}
return -1;
}
private boolean matchDSTString(String text, int start, int zoneIndex, int standardIndex) {
int index = standardIndex + 2;
String zoneName = formatData.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) {
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 DateFormatZoneData strings.
// Want to be able to parse both short and long forms.
int zoneIndex =
formatData.getZoneIndex (currentTimeZone.getID());
TimeZone tz = null;
int j = 0, i = 0;
if ((zoneIndex != -1) && ((j = matchZoneString(text, start, zoneIndex)) > 0)) {
if (j <= 2) {
useSameName = matchDSTString(text, start, zoneIndex, j);
}
tz = TimeZone.getTimeZone(formatData.zoneStrings[zoneIndex][0]);
i = zoneIndex;
}
if (tz == null) {
zoneIndex =
formatData.getZoneIndex (TimeZone.getDefault().getID());
if ((zoneIndex != -1) && ((j = matchZoneString(text, start, zoneIndex)) > 0)) {
if (j <= 2) {
useSameName = matchDSTString(text, start, zoneIndex, j);
}
tz = TimeZone.getTimeZone(formatData.zoneStrings[zoneIndex][0]);
i = zoneIndex;
}
}
if (tz == null) {
for (i = 0; i < formatData.zoneStrings.length; i++) {
if ((j = matchZoneString(text, start, i)) > 0) {
if (j <= 2) {
useSameName = matchDSTString(text, start, i, j);
}
tz = TimeZone.getTimeZone(formatData.zoneStrings[i][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.
if (!useSameName) {
calendar.set(Calendar.ZONE_OFFSET, tz.getRawOffset());
calendar.set(Calendar.DST_OFFSET,
j >= 3 ? tz.getDSTSavings() : 0);
}
return (start + formatData.zoneStrings[i][j].length());
}
return 0;
}
/**
* 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 ch the pattern character for the date field text to be parsed.
* @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)
{
Number number = null;
int value = 0;
ParsePosition pos = new ParsePosition(0);
pos.index = start;
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;
}
// 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 == 4 /*HOUR_OF_DAY1_FIELD*/ ||
patternCharIndex == 15 /*HOUR1_FIELD*/ ||
(patternCharIndex == 2 /*MONTH_FIELD*/ && count <= 2) ||
patternCharIndex == 1)
{
// 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()) {
origPos.errorIndex = start;
return -1;
}
number = numberFormat.parse(text.substring(0, start+count), pos);
}
else number = numberFormat.parse(text, pos);
if (number == null) {
origPos.errorIndex = pos.index;
return -1;
}
value = number.intValue();
}
int index;
switch (patternCharIndex)
{
case 0: // 'G' - ERA
if ((index = matchString(text, start, Calendar.ERA, formatData.eras)) > 0) {
return index;
} else {
origPos.errorIndex = pos.index;
return -1;
}
case 1: // 'y' - YEAR
// 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 - start) == 2
&& Character.isDigit(text.charAt(start))
&& Character.isDigit(text.charAt(start+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);
}
calendar.set(Calendar.YEAR, value);
return pos.index;
case 2: // 'M' - MONTH
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.]
calendar.set(Calendar.MONTH, value - 1);
return pos.index;
}
else
{
// count >= 3 // i.e., MMM or MMMM
// Want to be able to parse both short and long forms.
// Try count == 4 first:
int newStart = 0;
if ((newStart=matchString(text, start, Calendar.MONTH,
formatData.months)) > 0)
return newStart;
else // count == 4 failed, now try count == 3
if ((index = matchString(text, start, Calendar.MONTH,
formatData.shortMonths)) > 0) {
return index;
} else {
origPos.errorIndex = pos.index;
return -1;
}
}
case 4: // 'k' - HOUR_OF_DAY: 1-based. eg, 23:59 + 1 hour =>> 24:59
// [We computed 'value' above.]
if (value == calendar.getMaximum(Calendar.HOUR_OF_DAY)+1) value = 0;
calendar.set(Calendar.HOUR_OF_DAY, value);
return pos.index;
case 9: { // 'E' - DAY_OF_WEEK
// Want to be able to parse both short and long forms.
// Try count == 4 (DDDD) first:
int newStart = 0;
if ((newStart=matchString(text, start, Calendar.DAY_OF_WEEK,
formatData.weekdays)) > 0)
return newStart;
else // DDDD failed, now try DDD
if ((index = matchString(text, start, Calendar.DAY_OF_WEEK,
formatData.shortWeekdays)) > 0) {
return index;
} else {
origPos.errorIndex = pos.index;
return -1;
}
}
case 14: // 'a' - AM_PM
if ((index = matchString(text, start, Calendar.AM_PM, formatData.ampms)) > 0) {
return index;
} else {
origPos.errorIndex = pos.index;
return -1;
}
case 15: // 'h' - HOUR:1-based. eg, 11PM + 1 hour =>> 12 AM
// [We computed 'value' above.]
if (value == calendar.getLeastMaximum(Calendar.HOUR)+1) value = 0;
calendar.set(Calendar.HOUR, value);
return pos.index;
case 17: // 'z' - ZONE_OFFSET
case 18: // 'Z' - ZONE_OFFSET
// First try to parse generic forms such as GMT-07:00. Do this first
// in case localized DateFormatZoneData contains the string "GMT"
// for a zone; in that case, we don't want to match the first three
// characters of GMT+/-hh:mm etc.
{
int sign = 0;
int offset;
// For time zones that have no known names, look for strings
// of the form:
// GMT[+-]hours:minutes or
// GMT.
if ((text.length() - start) >= GMT.length() &&
text.regionMatches(true, start, GMT, 0, GMT.length())) {
int num;
calendar.set(Calendar.DST_OFFSET, 0);
pos.index = start + GMT.length();
try { // try-catch for "GMT" only time zone string
if( text.charAt(pos.index) == '+' ) {
sign = 1;
} else if( text.charAt(pos.index) == '-' ) {
sign = -1;
}
}
catch(StringIndexOutOfBoundsException e) {}
if (sign == 0) { /* "GMT" without offset */
calendar.set(Calendar.ZONE_OFFSET, 0 );
return pos.index;
}
// Look for hours.
try {
char c = text.charAt(++pos.index);
if (c < '0' || c > '9') { /* must be from '0' to '9'. */
origPos.errorIndex = pos.index;
return -1; // Wasn't actually a number.
} else {
num = c - '0';
}
if (text.charAt(++pos.index) != ':') {
c = text.charAt(pos.index);
if (c < '0' || c > '9') { /* must be from '0' to '9'. */
origPos.errorIndex = pos.index;
return -1; // Wasn't actually a number.
} else {
num *= 10;
num += c - '0';
pos.index++;
}
}
if (num > 23) {
origPos.errorIndex = pos.index - 1;
return -1; // Wasn't actually a number.
}
if (text.charAt(pos.index) != ':') {
origPos.errorIndex = pos.index;
return -1; // Wasn't actually a number.
}
}
catch(StringIndexOutOfBoundsException e) {
origPos.errorIndex = pos.index;
return -1; // Wasn't actually a number.
}
// Look for minutes.
offset = num * 60;
try {
char c = text.charAt(++pos.index);
if (c < '0' || c > '9') { /* must be from '0' to '9'. */
origPos.errorIndex = pos.index;
return -1; // Wasn't actually a number.
} else {
num = c - '0';
c = text.charAt(++pos.index);
if (c < '0' || c > '9') { /* must be from '0' to '9'. */
origPos.errorIndex = pos.index;
return -1; // Wasn't actually a number.
} else {
num *= 10;
num += c - '0';
}
}
if (num > 59) {
origPos.errorIndex = pos.index;
return -1; // Wasn't actually a number.
}
}
catch(StringIndexOutOfBoundsException e) {
origPos.errorIndex = pos.index;
return -1; // Wasn't actually a number.
}
offset += num;
// Fall through for final processing below of 'offset' and 'sign'.
}
else {
// At this point, check for named time zones by looking through
// the locale data from the DateFormatZoneData strings.
// Want to be able to parse both short and long forms.
int i = subParseZoneString(text, pos.index);
if (i != 0) {
return i;
}
// As a last resort, look for numeric timezones of the form
// [+-]hhmm as specified by RFC 822. This code is actually
// a little more permissive than RFC 822. It will try to do
// its best with numbers that aren't strictly 4 digits long.
try {
if( text.charAt(pos.index) == '+' ) {
sign = 1;
} else if( text.charAt(pos.index) == '-' ) {
sign = -1;
}
if (sign == 0) {
origPos.errorIndex = pos.index;
return -1;
}
// Look for hh.
int hours = 0;
char c = text.charAt(++pos.index);
if (c < '0' || c > '9') { /* must be from '0' to '9'. */
origPos.errorIndex = pos.index;
return -1; // Wasn't actually a number.
} else {
hours = c - '0';
c = text.charAt(++pos.index);
if (c < '0' || c > '9') { /* must be from '0' to '9'. */
origPos.errorIndex = pos.index;
return -1; // Wasn't actually a number.
} else {
hours *= 10;
hours += c - '0';
}
}
if (hours > 23) {
origPos.errorIndex = pos.index;
return -1; // Wasn't actually a number.
}
// Look for mm.
int minutes = 0;
c = text.charAt(++pos.index);
if (c < '0' || c > '9') { /* must be from '0' to '9'. */
origPos.errorIndex = pos.index;
return -1; // Wasn't actually a number.
} else {
minutes = c - '0';
c = text.charAt(++pos.index);
if (c < '0' || c > '9') { /* must be from '0' to '9'. */
origPos.errorIndex = pos.index;
return -1; // Wasn't actually a number.
} else {
minutes *= 10;
minutes += c - '0';
}
}
if (minutes > 59) {
origPos.errorIndex = pos.index;
return -1; // Wasn't actually a number.
}
offset = hours * 60 + minutes;
} catch(StringIndexOutOfBoundsException e) {
origPos.errorIndex = pos.index;
return -1; // Wasn't actually a number.
}
}
// Do the final processing for both of the above cases. We only
// arrive here if the form GMT+/-... or an RFC 822 form was seen.
if (sign != 0)
{
offset *= millisPerMinute * sign;
calendar.set(Calendar.ZONE_OFFSET, offset);
calendar.set(Calendar.DST_OFFSET, 0);
return ++pos.index;
}
}
// All efforts to parse a zone failed.
origPos.errorIndex = pos.index;
return -1;
default:
// case 3: // 'd' - DATE
// case 5: // 'H' - HOUR_OF_DAY:0-based. eg, 23:59 + 1 hour =>> 00:59
// case 6: // 'm' - MINUTE
// case 7: // 's' - SECOND
// case 8: // 'S' - MILLISECOND
// case 10: // 'D' - DAY_OF_YEAR
// case 11: // 'F' - DAY_OF_WEEK_IN_MONTH
// case 12: // 'w' - WEEK_OF_YEAR
// case 13: // 'W' - WEEK_OF_MONTH
// case 16: // 'K' - HOUR: 0-based. eg, 11PM + 1 hour =>> 0 AM
// Handle "generic" fields
if (obeyCount)
{
if ((start+count) > text.length()) {
origPos.errorIndex = pos.index;
return -1;
}
number = numberFormat.parse(text.substring(0, start+count), pos);
}
else number = numberFormat.parse(text, pos);
if (number != null) {
calendar.set(field, number.intValue());
return pos.index;
}
origPos.errorIndex = pos.index;
return -1;
}
}
/**
* 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 == -1)
throw new IllegalArgumentException("Illegal pattern " +
" character '" +
c + "'");
c = to.charAt(ci);
}
}
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,
formatData.patternChars,
formatData.localPatternChars);
}
/**
* 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)
{
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.localPatternChars,
formatData.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();
}
/**
* 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>
*/
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.
*/
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>
*/
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));
}
/**
* 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);
}
}
}
}
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