/*
* @(#)SimpleDateFormat.java 1.25 97/07/24
*
* (C) Copyright Taligent, Inc. 1996 - All Rights Reserved
* (C) Copyright IBM Corp. 1996 - All Rights Reserved
*
* Portions copyright (c) 1996 Sun Microsystems, Inc. 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.
*
* Permission to use, copy, modify, and distribute this software
* and its documentation for NON-COMMERCIAL purposes and without
* fee is hereby granted provided that this copyright notice
* appears in all copies. Please refer to the file "copyright.html"
* for further important copyright and licensing information.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
* THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
* TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
*
*/
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.IOException;
import java.lang.ClassNotFoundException;
/**
* SimpleDateFormat is a concrete class for formatting and
* parsing dates in a locale-sensitive manner. It allows for formatting
* (millis -> text), parsing (text -> millis), and normalization.
*
*
* SimpleDateFormat 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
* getTimeInstance, getDateInstance, or
* getDateTimeInstance in DateFormat. 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 applyPattern methods as desired.
* For more information on using these methods, see
* DateFormat.
*
*
* Time Format Syntax:
*
* To specify the time format use a time pattern string.
* In this pattern, all ASCII letters are reserved as pattern letters,
* which are defined as the following:
*
*
* Symbol Meaning Presentation Example
* ------ ------- ------------ -------
* G era designator (Text) AD
* y year (Number) 1996
* M month in year (Text & Number) July & 07
* d day in month (Number) 10
* h hour in am/pm (1~12) (Number) 12
* H hour in day (0~23) (Number) 0
* m minute in hour (Number) 30
* s second in minute (Number) 55
* S millisecond (Number) 978
* E day in week (Text) Tuesday
* D day in year (Number) 189
* F day of week in month (Number) 2 (2nd Wed in July)
* w week in year (Number) 27
* W week in month (Number) 2
* a am/pm marker (Text) PM
* k hour in day (1~24) (Number) 24
* K hour in am/pm (0~11) (Number) 0
* z time zone (Text) Pacific Standard Time
* ' escape for text (Delimiter)
* '' single quote (Literal) '
*
*
* The count of pattern letters determine the format.
*
* (Text): 4 or more pattern letters--use full form,
* < 4--use short or abbreviated form if one exists.
*
* (Number): the minimum number of digits. Shorter
* numbers are zero-padded to this amount. Year is handled specially;
* that is, if the count of 'y' is 2, the Year will be truncated to 2 digits.
*
* (Text & Number): 3 or over, use text, otherwise use number.
*
* Any characters in the pattern that are not in the ranges of ['a'..'z']
* and ['A'..'Z'] will be treated as quoted text. For instance, characters
* like ':', '.', ' ', '#' and '@' will appear in the resulting time text
* even they are not embraced within single quotes.
*
* A pattern containing any invalid pattern letter will result in a thrown
* exception during formatting or parsing.
*
*
* Examples Using the US Locale:
*
*
* Format Pattern Result
* -------------- -------
* "yyyy.MM.dd G 'at' hh:mm:ss z" ->> 1996.07.10 AD at 15:08:56 PDT
* "EEE, MMM d, ''yy" ->> Wed, July 10, '96
* "h:mm a" ->> 12:08 PM
* "hh 'o''clock' a, zzzz" ->> 12 o'clock PM, Pacific Daylight Time
* "K:mm a, z" ->> 0:00 PM, PST
* "yyyyy.MMMMM.dd GGG hh:mm aaa" ->> 1996.July.10 AD 12:08 PM
*
*
* Code Sample:
*
*
* SimpleTimeZone pdt = new SimpleTimeZone(-8 * 60 * 60 * 1000, "PST");
* pdt.setStartRule(DateFields.APRIL, 1, DateFields.SUNDAY, 2*60*60*1000);
* pdt.setEndRule(DateFields.OCTOBER, -1, DateFields.SUNDAY, 2*60*60*1000);
*
* // Format the current time.
* SimpleDateFormat formatter
* = new SimpleDateFormat ("yyyy.mm.dd e 'at' hh:mm:ss a zzz");
* Date currentTime_1 = new Date();
* String dateString = formatter.format(currentTime_1);
*
* // Parse the previous string back into a Date.
* ParsePosition pos = new ParsePosition(0);
* Date currentTime_2 = formatter.parse(dateString, pos);
*
*
* In the example, the time value currentTime_2 obtained from
* parsing will be equal to currentTime_1. However, they may not be
* equal if the am/pm marker 'a' is left out from the format pattern while
* the "hour in am/pm" pattern symbol is used. This information loss can
* happen when formatting the time in PM.
*
*
* When parsing a date string using the abbreviated year pattern,
* SimpleDateFormat 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 SimpleDateFormat
* instance is created. For example, using a pattern of MM/dd/yy and a
* SimpleDateFormat 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.
*
*
* For time zones that have no names, use strings GMT+hours:minutes or
* GMT-hours:minutes.
*
*
* The calendar defines what is the first day of the week, the first week
* of the year, whether hours are zero based or not (0 vs 12 or 24), and the
* time zone. There is one common decimal format to handle all the numbers;
* the digit count is handled programmatically according to the pattern.
*
* @see java.util.Calendar
* @see java.util.GregorianCalendar
* @see java.util.TimeZone
* @see DateFormat
* @see DateFormatSymbols
* @see DecimalFormat
* @version 1.25 07/24/97
* @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;
private int serialVersionOnStream = currentSerialVersion;
private String pattern;
private DateFormatSymbols formatData;
// if dates have ambiguous years, we map them into the century starting
// at defaultCenturyStart, which may be any date.
private Date defaultCenturyStart; // field new in JDK 1.1.4
transient private int defaultCenturyDelta;
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_PLUS = "GMT+";
private static final String GMT_MINUS = "GMT-";
private static final String GMT = "GMT";
/**
* Construct a SimpleDateFormat using the default pattern for the default
* locale. Note: Not all locales support SimpleDateFormat; for full
* generality, use the factory methods in the DateFormat class.
*
* @see java.text.DateFormat
*/
public SimpleDateFormat() {
this(SHORT, SHORT + 4, Locale.getDefault());
}
/**
* Construct a SimpleDateFormat using the given pattern in the default
* locale. Note: Not all locales support SimpleDateFormat; for full
* generality, use the factory methods in the DateFormat class.
*/
public SimpleDateFormat(String pattern)
{
this(pattern, Locale.getDefault());
}
/**
* Construct a SimpleDateFormat using the given pattern and locale.
* Note: Not all locales support SimpleDateFormat; for full
* generality, use the factory methods in the DateFormat class.
*/
public SimpleDateFormat(String pattern, Locale loc)
{
this.pattern = pattern;
this.formatData = new DateFormatSymbols(loc);
initialize(loc);
}
/**
* Construct a SimpleDateFormat using the given pattern and
* locale-specific symbol data.
*/
public SimpleDateFormat(String pattern, DateFormatSymbols formatData)
{
this.pattern = pattern;
this.formatData = formatData;
initialize(Locale.getDefault());
}
/* Package-private, called by DateFormat factory methods */
SimpleDateFormat(int timeStyle, int dateStyle, Locale loc) {
ResourceBundle r = ResourceBundle.getBundle
("java.text.resources.LocaleElements", loc);
formatData = new DateFormatSymbols(loc);
String[] dateTimePatterns = r.getStringArray("DateTimePatterns");
if ((timeStyle >= 0) && (dateStyle >= 0)) {
Object[] dateTimeArgs = {dateTimePatterns[timeStyle],
dateTimePatterns[dateStyle]};
pattern = MessageFormat.format(dateTimePatterns[8], dateTimeArgs);
}
else if (timeStyle >= 0)
pattern = dateTimePatterns[timeStyle];
else if (dateStyle >= 0)
pattern = dateTimePatterns[dateStyle];
else
throw new IllegalArgumentException("No date or time style specified");
initialize(loc);
}
/* Initialize calendar and numberFormat fields */
private void initialize(Locale loc) {
calendar = Calendar.getInstance(TimeZone.getTimeZone(formatData.zoneStrings[0][0]), loc);
numberFormat = NumberFormat.getInstance(loc);
numberFormat.setGroupingUsed(false);
if (numberFormat instanceof DecimalFormat)
((DecimalFormat)numberFormat).setDecimalSeparatorAlwaysShown(false);
numberFormat.setParseIntegerOnly(true); /* So that dd.mm.yy can be parsed */
initializeDefaultCentury();
}
/* 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. Make public in JDK 1.2.
*/
private void parseAmbiguousDatesAsAfter(Date startDate) {
defaultCenturyStart = startDate;
calendar.setTime(startDate);
defaultCenturyDelta = (calendar.get(Calendar.YEAR)/100)*100;
}
/**
* Overrides DateFormat
*
Formats a date or time, which is the standard millis
* since 24:00 GMT, Jan 1, 1970.
*
Example: using the US locale:
* "yyyy.MM.dd e 'at' HH:mm:ss zzz" ->> 1996.07.10 AD at 15:08:56 PDT
* @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.
* @see java.util.DateFormat
*/
public StringBuffer format(Date date, StringBuffer toAppendTo,
FieldPosition pos)
{
// Initialize
pos.beginIndex = pos.endIndex = 0;
// Convert input date to time field list
calendar.setTime(date);
boolean inQuote = false; // inQuote set true when hits 1st single quote
char prevCh = 0;
int count = 0; // number of time pattern characters repeated
int interQuoteCount = 1; // Number of characters between quotes
for (int i=0; i 0) // handle cases like: yyyy'....
{
toAppendTo.append(subFormat(prevCh, count,
toAppendTo.length(),
pos));
count = 0;
prevCh = 0;
}
// We count characters between quotes so we can recognize
// two single quotes inside a quote. Example: 'o''clock'.
if (interQuoteCount == 0)
{
toAppendTo.append(ch);
count = 1; // Make it look like we never left.
}
}
else if (ch >= 'a' && ch <= 'z' || ch >= 'A' && ch <= 'Z')
{
// ch is a date-time pattern
if (ch != prevCh && count > 0) //handle cases: eg, yyyyMMdd
{
toAppendTo.append(subFormat(prevCh, count,
toAppendTo.length(),
pos));
prevCh = ch;
count = 1;
}
else
{
if (ch != prevCh)
prevCh = ch;
count++;
}
}
else if (count > 0) // handle cases like: MM-dd-yy or HH:mm:ss
{
toAppendTo.append(subFormat(prevCh, count,
toAppendTo.length(),
pos));
toAppendTo.append(ch);
prevCh = 0;
count = 0;
}
else // any other unquoted characters
toAppendTo.append(ch);
++interQuoteCount;
}
}
// Format the last item in the pattern
if (count > 0)
{
toAppendTo.append(subFormat(prevCh, count,
toAppendTo.length(), pos));
}
return toAppendTo;
}
// Map index into pattern character string to Calendar field number.
private static final int[] PATTERN_INDEX_TO_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
};
// Private member function that does the real date/time formatting.
private String subFormat(char ch, int count, int beginOffset,
FieldPosition pos)
throws IllegalArgumentException
{
int patternCharIndex = -1;
int maxIntCount = 10;
String current = "";
if ((patternCharIndex=formatData.patternChars.indexOf(ch)) == -1)
throw new IllegalArgumentException("Illegal pattern character " +
"'" + ch + "'");
int field = PATTERN_INDEX_TO_FIELD[patternCharIndex];
int value = calendar.get(field);
switch (patternCharIndex) {
case 0: // 'G' - ERA
current = formatData.eras[value];
break;
case 1: // 'y' - YEAR
if (count >= 4)
// current = zeroPaddingNumber(value, 4, count);
current = zeroPaddingNumber(value, 4, maxIntCount);
else // count < 4
current = zeroPaddingNumber(value, 2, 2); // 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
current = zeroPaddingNumber(value+1, count, maxIntCount);
break;
case 4: // 'k' - HOUR_OF_DAY: 1-based. eg, 23:59 + 1 hour =>> 24:59
if (value == 0)
current = zeroPaddingNumber(
calendar.getMaximum(Calendar.HOUR_OF_DAY)+1,
count, maxIntCount);
else
current = zeroPaddingNumber(value, count, maxIntCount);
break;
case 8: // 'S' - MILLISECOND
if (count > 3)
count = 3;
else if (count == 2)
value = value / 10;
else if (count == 1)
value = value / 100;
current = zeroPaddingNumber(value, count, maxIntCount);
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)
current = zeroPaddingNumber(
calendar.getLeastMaximum(Calendar.HOUR)+1,
count, maxIntCount);
else
current = zeroPaddingNumber(value, count, maxIntCount);
break;
case 17: // 'z' - ZONE_OFFSET
int zoneIndex
= formatData.getZoneIndex (calendar.getTimeZone().getID());
if (zoneIndex == -1)
{
// For time zones that have no names, use strings
// GMT+hours:minutes and GMT-hours:minutes.
// For instance, France time zone uses GMT+01:00.
StringBuffer zoneString = new StringBuffer();
value = calendar.get(Calendar.ZONE_OFFSET) +
calendar.get(Calendar.DST_OFFSET);
if (value < 0)
{
zoneString.append(GMT_MINUS);
value = -value; // suppress the '-' sign for text display.
}
else
zoneString.append(GMT_PLUS);
zoneString.append(
zeroPaddingNumber((int)(value/millisPerHour), 2, 2));
zoneString.append(':');
zoneString.append(
zeroPaddingNumber(
(int)((value%millisPerHour)/millisPerMinute), 2, 2));
current = zoneString.toString();
}
else if (calendar.get(Calendar.DST_OFFSET) != 0)
{
if (count >= 4)
current = formatData.zoneStrings[zoneIndex][3];
else
// count < 4, use abbreviated form if exists
current = formatData.zoneStrings[zoneIndex][4];
}
else
{
if (count >= 4)
current = formatData.zoneStrings[zoneIndex][1];
else
current = formatData.zoneStrings[zoneIndex][2];
}
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 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
current = zeroPaddingNumber(value, count, maxIntCount);
break;
} // switch (patternCharIndex)
if (pos.field == field) {
// set for the first occurence only.
if (pos.beginIndex == 0 && pos.endIndex == 0) {
pos.beginIndex = beginOffset;
pos.endIndex = beginOffset + current.length();
}
}
return current;
}
// Pad the shorter numbers up to maxCount digits.
private String zeroPaddingNumber(long value, int minDigits, int maxDigits)
{
numberFormat.setMinimumIntegerDigits(minDigits);
numberFormat.setMaximumIntegerDigits(maxDigits);
return numberFormat.format(value);
}
/**
* Overrides DateFormat
* @see java.util.DateFormat
*/
public Date parse(String text, ParsePosition pos)
{
int start = pos.index;
int oldStart = start;
boolean[] ambiguousYear = {false};
calendar.clear(); // Clears all the time fields
boolean inQuote = false; // inQuote set true when hits 1st single quote
char prevCh = 0;
int count = 0;
int interQuoteCount = 1; // Number of chars between quotes
for (int i=0; i 0) // handle cases like: e'at'
{
start=subParse(text, start, prevCh, count,
false, ambiguousYear);
if ( start<0 ) {
pos.index = oldStart;
return null;
}
count = 0;
}
if (interQuoteCount == 0)
{
// This indicates two consecutive quotes inside a quote,
// for example, 'o''clock'. We need to parse this as
// representing a single quote within the quote.
if (ch != text.charAt(start))
{
pos.index = oldStart;
return null;
}
++start;
count = 1; // Make it look like we never left
}
}
else if (ch >= 'a' && ch <= 'z' || ch >= 'A' && ch <= 'Z')
{
// ch is a date-time pattern
if (ch != prevCh && count > 0) // e.g., yyyymmdd
{
// This is the only case where we pass in 'true' for
// obeyCount. That's because the next field directly
// abuts this one, so we have to use the count to know when
// to stop parsing. [LIU]
start = subParse(text, start, prevCh, count, true,
ambiguousYear);
if (start < 0) {
pos.index = oldStart;
return null;
}
prevCh = ch;
count = 1;
}
else
{
if (ch != prevCh)
prevCh = ch;
count++;
}
}
else if (count > 0)
{
// handle cases like: MM-dd-yy, HH:mm:ss, or yyyy MM dd,
// where ch = '-', ':', or ' ', repectively.
start=subParse(text, start, prevCh, count,
false, ambiguousYear);
if ( start < 0 ) {
pos.index = oldStart;
return null;
}
if (start >= text.length() || ch != text.charAt(start)) {
// handle cases like: 'MMMM dd' in pattern vs. "janx20"
// in time text, where ' ' doesn't match with 'x'.
pos.index = oldStart;
return null;
}
start++;
count = 0;
prevCh = 0;
}
else // any other unquoted characters
{
if (ch != text.charAt(start)) {
// handle cases like: 'MMMM dd' in pattern vs.
// "jan,,,20" in time text, where " " doesn't
// match with ",,,".
pos.index = oldStart;
return null;
}
start++;
}
++interQuoteCount;
}
}
// Parse the last item in the pattern
if (count > 0)
{
start=subParse(text, start, prevCh, count,
false, ambiguousYear);
if ( start < 0 ) {
pos.index = oldStart;
return null;
}
}
pos.index = start;
// If any of yy MM dd hh mm ss SSS is missing, the "default day" -- Jan
// 1, 1970 -- and the "default time" -- 00:00:00.000 AM -- will be used.
// We make as few changes as possible, preserving any fields that have
// been set. So if the user has set the DAY_OF_WEEK, that will be
// respected. If the user has set the WEEK_OF_YEAR, that will be
// respected. In the case of incomplete data, the order of
// interpretation follows that used by GregorianCalendar. So if the
// user sets WEEK_OF_YEAR and MONTH, then MONTH takes precedence.
if (!calendar.isSet(Calendar.YEAR))
calendar.set(Calendar.YEAR, 1970);
if (!calendar.isSet(Calendar.ERA))
calendar.set(Calendar.ERA,GregorianCalendar.AD);
// This section must understand Calendar's field disambiguation
// algorithm. Calendar resolves fields by trying to use the following
// field combinations, in the following order:
// MONTH + DAY_OF_MONTH
// MONTH + WEEK_OF_MONTH + DAY_OF_WEEK
// MONTH + DAY_OF_WEEK_IN_MONTH + DAY_OF_WEEK
// DAY_OF_YEAR
// DAY_OF_WEEK + WEEK_OF_YEAR
// HOUR_OF_DAY
// AM_PM + HOUR
// Consequently, we must fill in missing fields after traversing
// the same sequence, and only do so when necessary.
// This big if expression is true if we do NOT have a full set
// of data with which to specify the specific day of the year.
// We need to check this first, then march through the hierarchy
// stepwise to fill in missing fields as needed, in the same order.
if (!
((calendar.isSet(Calendar.MONTH) &&
(calendar.isSet(Calendar.DATE) ||
(calendar.isSet(Calendar.DAY_OF_WEEK) &&
(calendar.isSet(Calendar.WEEK_OF_MONTH) ||
calendar.isSet(Calendar.DAY_OF_WEEK_IN_MONTH))
)
)) ||
(calendar.isSet(Calendar.DAY_OF_YEAR) ||
(calendar.isSet(Calendar.DAY_OF_WEEK) &&
(calendar.isSet(Calendar.WEEK_OF_YEAR))))
))
{
// Not enough information; need to fill in fields with defaults
if (calendar.isSet(Calendar.MONTH))
{
// We know that the month and day are not specified completely,
// so we have the month and one or zero of the fields
// WEEK_OF_MONTH, DAY_OF_WEEK, and DAY_OF_WEEK_IN_MONTH.
// Our default rules:
// no fields _> set DAY_OF_MONTH to 1
// DAY_OF_WEEK -> set DAY_OF_WEEK_IN_MONTH to 1
// WEEK_OF_MONTH or DAY_OF_WEEK_IN_MONTH -> set DAY_OF_WEEK to
// first day of week (locale specific).
if (calendar.isSet(Calendar.DAY_OF_WEEK))
calendar.set(Calendar.DAY_OF_WEEK_IN_MONTH, 1);
else if (calendar.isSet(Calendar.WEEK_OF_MONTH) ||
calendar.isSet(Calendar.DAY_OF_WEEK_IN_MONTH))
calendar.set(Calendar.DAY_OF_WEEK, calendar.getFirstDayOfWeek());
else
calendar.set(Calendar.DAY_OF_MONTH, 1);
}
else
{
// At this point we have one or zero of the fields DAY_OF_WEEK
// and WEEK_OF_YEAR. If we have zero, we set the DAY_OF_YEAR to
// 1. If we have the WEEK_OF_YEAR, we set the DAY_OF_WEEK to
// the locale-specific first day of the week. If we have the
// DAY_OF_WEEK, we set the WEEK_OF_YEAR to 1.
if (calendar.isSet(Calendar.DAY_OF_WEEK))
calendar.set(Calendar.WEEK_OF_YEAR, 1);
else if (calendar.isSet(Calendar.WEEK_OF_YEAR))
calendar.set(Calendar.DAY_OF_WEEK, calendar.getFirstDayOfWeek());
else
calendar.set(Calendar.DAY_OF_YEAR, 1);
}
}
if (!calendar.isSet(Calendar.HOUR_OF_DAY) &&
!calendar.isSet(Calendar.HOUR))
calendar.set(Calendar.HOUR_OF_DAY, 0);
if (!calendar.isSet(Calendar.MINUTE))
calendar.set(Calendar.MINUTE, 0);
if (!calendar.isSet(Calendar.SECOND))
calendar.set(Calendar.SECOND, 0);
if (!calendar.isSet(Calendar.MILLISECOND))
calendar.set(Calendar.MILLISECOND, 0);
Date parsedDate = calendar.getTime();
if( ambiguousYear[0] && !parsedDate.after(defaultCenturyStart) ) {
calendar.add(Calendar.YEAR, 100);
parsedDate = calendar.getTime();
}
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;
for (; i text.length()) return -start;
number = numberFormat.parse(text.substring(0, start+count), pos);
}
else number = numberFormat.parse(text, pos);
if (number == null) return -start;
value = number.intValue();
}
switch (patternCharIndex)
{
case 0: // 'G' - ERA
return matchString(text, start, Calendar.ERA, formatData.eras);
case 1: // 'y' - YEAR
// If there are 4 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.
if (count < 4)
{
ambiguousYear[0] = true;
value += defaultCenturyDelta;
}
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
return matchString(text, start, Calendar.MONTH,
formatData.shortMonths);
}
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
return matchString(text, start, Calendar.DAY_OF_WEEK,
formatData.shortWeekdays);
}
case 14: // 'a' - AM_PM
return matchString(text, start, Calendar.AM_PM, formatData.ampms);
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
// Want to be able to parse both short and long forms.
for (i=0; i= 3)
calendar.set(Calendar.DST_OFFSET, millisPerHour);
return (start + formatData.zoneStrings[i][j].length());
}
}
// For time zones that have no known names, look for strings
// of the form:
// GMT[+-]hours:minutes or
// GMT[+-]hhmm or
// GMT.
if (text.regionMatches(true,start, GMT, 0, GMT.length()))
{
calendar.set(Calendar.DST_OFFSET, 0);
pos.index = start + GMT.length();
int offsetInMinutes = 0;
int sign;
if( text.regionMatches(pos.index, "+", 0, 1) )
sign = 1;
else if( text.regionMatches(pos.index, "-", 0, 1) )
sign = -1;
else {
calendar.set(Calendar.ZONE_OFFSET, 0 );
return pos.index;
}
// Look for hours:minutes or hhmm.
pos.index++;
Number tzNumber = numberFormat.parse(text, pos);
if( tzNumber == null ) {
return -start;
}
if( text.regionMatches(pos.index, ":", 0, 1) ) {
// This is the hours:minutes case
offsetInMinutes = tzNumber.intValue() * 60;
pos.index++;
tzNumber = numberFormat.parse(text, pos);
if( tzNumber == null ) {
return -start;
}
offsetInMinutes += tzNumber.intValue();
}
else {
// This is the hhmm case.
int offset = tzNumber.intValue();
if( offset < 24 )
offsetInMinutes = offset * 60;
else
offsetInMinutes = offset % 100 + offset / 100 * 60;
}
calendar.set(Calendar.ZONE_OFFSET,
offsetInMinutes*millisPerMinute*sign);
return pos.index;
}
else {
// 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.
DecimalFormat fmt
= new DecimalFormat("+####;-####",
new DecimalFormatSymbols(Locale.US) );
Number tzNumber = fmt.parse( text, pos );
if( tzNumber == null ) {
return -start; // Wasn't actually a number.
}
int offset = tzNumber.intValue();
int sign = 1;
if( offset < 0 ) {
sign = -1;
offset *= -1;
}
if( offset < 24 )
offset = offset * 60;
else
offset = offset % 100 + offset / 100 * 60;
offset *= millisPerMinute * sign;
if (calendar.getTimeZone().useDaylightTime()) {
calendar.set(Calendar.DST_OFFSET, millisPerHour);
calendar.set(Calendar.ZONE_OFFSET, offset - millisPerHour);
}
else calendar.set(Calendar.ZONE_OFFSET, offset);
return pos.index;
}
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()) return -start;
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;
}
return -start;
}
}
/**
* Translate a pattern, mapping each character in the from string to the
* corresponding character in the to string.
*/
private String translatePattern(String pattern, String from, String to) {
StringBuffer result = new StringBuffer();
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();
}
/**
* Return a pattern string describing this date format.
*/
public String toPattern() {
return pattern;
}
/**
* Return a localized pattern string describing this date format.
*/
public String toLocalizedPattern() {
return translatePattern(pattern,
formatData.patternChars,
formatData.localPatternChars);
}
/**
* Apply the given unlocalized pattern string to this date format.
*/
public void applyPattern (String pattern)
{
this.pattern = pattern;
}
/**
* Apply the given localized pattern string to this date format.
*/
public void applyLocalizedPattern(String pattern) {
this.pattern = translatePattern(pattern,
formatData.localPatternChars,
formatData.patternChars);
}
/**
* Gets the date/time formatting data.
* @return a copy of the date-time formatting data associated
* with this date-time formatter.
*/
public DateFormatSymbols getDateFormatSymbols()
{
return (DateFormatSymbols)formatData.clone();
}
/**
* Allows you to set the date/time formatting data.
* @param newFormatData the given date-time formatting data.
*/
public void setDateFormatSymbols(DateFormatSymbols newFormatSymbols)
{
this.formatData = (DateFormatSymbols)newFormatSymbols.clone();
}
/**
* Overrides Cloneable
*/
public Object clone() {
SimpleDateFormat other = (SimpleDateFormat) super.clone();
other.formatData = (DateFormatSymbols) formatData.clone();
return other;
}
/**
* Override hashCode.
* Generates the hash code for the SimpleDateFormat object
*/
public int hashCode()
{
return pattern.hashCode();
// just enough fields for a reasonable distribution
}
/**
* Override equals.
*/
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));
}
/**
* Override readObject.
*/
private void readObject(ObjectInputStream stream)
throws IOException, ClassNotFoundException {
stream.defaultReadObject();
if (serialVersionOnStream < 1) {
// didn't have defaultCenturyStart field
initializeDefaultCentury();
}
else {
// fill in dependent transient field
parseAmbiguousDatesAsAfter(defaultCenturyStart);
}
serialVersionOnStream = currentSerialVersion;
}
}