SimpleDateFormat as a
* compiled representation of a format string. The field
* ID, size, and character used are stored for each sequence
* of pattern characters.
*/
private class CompiledField
{
/**
* The ID of the field within the local pattern characters.
* Package private for use in out class.
*/
int field;
/**
* The size of the character sequence.
* Package private for use in out class.
*/
int size;
/**
* The character used.
*/
private char character;
/**
* Constructs a compiled field using the
* the given field ID, size and character
* values.
*
* @param f the field ID.
* @param s the size of the field.
* @param c the character used.
*/
public CompiledField(int f, int s, char c)
{
field = f;
size = s;
character = c;
}
/**
* Retrieves the ID of the field relative to
* the local pattern characters.
*/
public int getField()
{
return field;
}
/**
* Retrieves the size of the character sequence.
*/
public int getSize()
{
return size;
}
/**
* Retrieves the character used in the sequence.
*/
public char getCharacter()
{
return character;
}
/**
* Returns a String representation
* of the compiled field, primarily for debugging
* purposes.
*
* @return a String representation.
*/
public String toString()
{
StringBuffer builder;
builder = new StringBuffer(getClass().getName());
builder.append("[field=");
builder.append(field);
builder.append(", size=");
builder.append(size);
builder.append(", character=");
builder.append(character);
builder.append("]");
return builder.toString();
}
}
/**
* A list of CompiledFields,
* representing the compiled version of the pattern.
*
* @see CompiledField
* @serial Ignored.
*/
private transient ArrayList tokens;
/**
* The localised data used in formatting,
* such as the day and month names in the local
* language, and the localized pattern characters.
*
* @see DateFormatSymbols
* @serial The localisation data. May not be null.
*/
private DateFormatSymbols formatData;
/**
* The date representing the start of the century
* used for interpreting two digit years. For
* example, 24/10/2004 would cause two digit
* years to be interpreted as representing
* the years between 2004 and 2104.
*
* @see get2DigitYearStart()
* @see set2DigitYearStart(java.util.Date)
* @see Date
* @serial The start date of the century for parsing two digit years.
* May not be null.
*/
private Date defaultCenturyStart;
/**
* The year at which interpretation of two
* digit years starts.
*
* @see get2DigitYearStart()
* @see set2DigitYearStart(java.util.Date)
* @serial Ignored.
*/
private transient int defaultCentury;
/**
* The non-localized pattern string. This
* only ever contains the pattern characters
* stored in standardChars. Localized patterns
* are translated to this form.
*
* @see applyPattern(String)
* @see applyLocalizedPattern(String)
* @see toPattern()
* @see toLocalizedPattern()
* @serial The non-localized pattern string. May not be null.
*/
private String pattern;
/**
* The version of serialized data used by this class.
* Version 0 only includes the pattern and formatting
* data. Version 1 adds the start date for interpreting
* two digit years.
*
* @serial This specifies the version of the data being serialized.
* Version 0 (or no version) specifies just pattern
* and formatData. Version 1 adds
* the defaultCenturyStart. This implementation
* always writes out version 1 data.
*/
private int serialVersionOnStream = 1; // 0 indicates JDK1.1.3 or earlier
/**
* For compatability.
*/
private static final long serialVersionUID = 4774881970558875024L;
// This string is specified in the root of the CLDR. We set it here
// rather than doing a DateFormatSymbols(Locale.US).getLocalPatternChars()
// since someone could theoretically change those values (though unlikely).
private static final String standardChars = "GyMdkHmsSEDFwWahKzYeugAZ";
/**
* Reads the serialized version of this object.
* If the serialized data is only version 0,
* then the date for the start of the century
* for interpreting two digit years is computed.
* The pattern is parsed and compiled following the process
* of reading in the serialized data.
*
* @param stream the object stream to read the data from.
* @throws IOException if an I/O error occurs.
* @throws ClassNotFoundException if the class of the serialized data
* could not be found.
* @throws InvalidObjectException if the pattern is invalid.
*/
private void readObject(ObjectInputStream stream)
throws IOException, ClassNotFoundException
{
stream.defaultReadObject();
if (serialVersionOnStream < 1)
{
computeCenturyStart ();
serialVersionOnStream = 1;
}
else
// Ensure that defaultCentury gets set.
set2DigitYearStart(defaultCenturyStart);
// Set up items normally taken care of by the constructor.
tokens = new ArrayList();
try
{
compileFormat(pattern);
}
catch (IllegalArgumentException e)
{
throw new InvalidObjectException("The stream pattern was invalid.");
}
}
/**
* Compiles the supplied non-localized pattern into a form
* from which formatting and parsing can be performed.
* This also detects errors in the pattern, which will
* be raised on later use of the compiled data.
*
* @param pattern the non-localized pattern to compile.
* @throws IllegalArgumentException if the pattern is invalid.
*/
private void compileFormat(String pattern)
{
// Any alphabetical characters are treated as pattern characters
// unless enclosed in single quotes.
char thisChar;
int pos;
int field;
CompiledField current = null;
for (int i=0; iSimpleDateFormat
* instance.
*/
public String toString()
{
StringBuffer output = new StringBuffer(getClass().getName());
output.append("[tokens=");
output.append(tokens);
output.append(", formatData=");
output.append(formatData);
output.append(", defaultCenturyStart=");
output.append(defaultCenturyStart);
output.append(", defaultCentury=");
output.append(defaultCentury);
output.append(", pattern=");
output.append(pattern);
output.append(", serialVersionOnStream=");
output.append(serialVersionOnStream);
output.append(", standardChars=");
output.append(standardChars);
output.append("]");
return output.toString();
}
/**
* Constructs a SimpleDateFormat using the default pattern for
* the default locale.
*/
public SimpleDateFormat()
{
/*
* There does not appear to be a standard API for determining
* what the default pattern for a locale is, so use package-scope
* variables in DateFormatSymbols to encapsulate this.
*/
super();
Locale locale = Locale.getDefault();
calendar = new GregorianCalendar(locale);
computeCenturyStart();
tokens = new ArrayList();
formatData = new DateFormatSymbols(locale);
pattern = (formatData.dateFormats[DEFAULT] + ' '
+ formatData.timeFormats[DEFAULT]);
compileFormat(pattern);
numberFormat = NumberFormat.getInstance(locale);
numberFormat.setGroupingUsed (false);
numberFormat.setParseIntegerOnly (true);
numberFormat.setMaximumFractionDigits (0);
}
/**
* Creates a date formatter using the specified non-localized pattern,
* with the default DateFormatSymbols for the default locale.
*
* @param pattern the pattern to use.
* @throws NullPointerException if the pattern is null.
* @throws IllegalArgumentException if the pattern is invalid.
*/
public SimpleDateFormat(String pattern)
{
this(pattern, Locale.getDefault());
}
/**
* Creates a date formatter using the specified non-localized pattern,
* with the default DateFormatSymbols for the given locale.
*
* @param pattern the non-localized pattern to use.
* @param locale the locale to use for the formatting symbols.
* @throws NullPointerException if the pattern is null.
* @throws IllegalArgumentException if the pattern is invalid.
*/
public SimpleDateFormat(String pattern, Locale locale)
{
super();
calendar = new GregorianCalendar(locale);
computeCenturyStart();
tokens = new ArrayList();
formatData = new DateFormatSymbols(locale);
compileFormat(pattern);
this.pattern = pattern;
numberFormat = NumberFormat.getInstance(locale);
numberFormat.setGroupingUsed (false);
numberFormat.setParseIntegerOnly (true);
numberFormat.setMaximumFractionDigits (0);
}
/**
* Creates a date formatter using the specified non-localized
* pattern. The specified DateFormatSymbols will be used when
* formatting.
*
* @param pattern the non-localized pattern to use.
* @param formatData the formatting symbols to use.
* @throws NullPointerException if the pattern or formatData is null.
* @throws IllegalArgumentException if the pattern is invalid.
*/
public SimpleDateFormat(String pattern, DateFormatSymbols formatData)
{
super();
calendar = new GregorianCalendar();
computeCenturyStart ();
tokens = new ArrayList();
if (formatData == null)
throw new NullPointerException("formatData");
this.formatData = formatData;
compileFormat(pattern);
this.pattern = pattern;
numberFormat = NumberFormat.getInstance();
numberFormat.setGroupingUsed (false);
numberFormat.setParseIntegerOnly (true);
numberFormat.setMaximumFractionDigits (0);
}
/**
* This method returns a string with the formatting pattern being used
* by this object. This string is unlocalized.
*
* @return The format string.
*/
public String toPattern()
{
return pattern;
}
/**
* This method returns a string with the formatting pattern being used
* by this object. This string is localized.
*
* @return The format string.
*/
public String toLocalizedPattern()
{
String localChars = formatData.getLocalPatternChars();
return translateLocalizedPattern(pattern, standardChars, localChars);
}
/**
* This method sets the formatting pattern that should be used by this
* object. This string is not localized.
*
* @param pattern The new format pattern.
* @throws NullPointerException if the pattern is null.
* @throws IllegalArgumentException if the pattern is invalid.
*/
public void applyPattern(String pattern)
{
tokens = new ArrayList();
compileFormat(pattern);
this.pattern = pattern;
}
/**
* This method sets the formatting pattern that should be used by this
* object. This string is localized.
*
* @param pattern The new format pattern.
* @throws NullPointerException if the pattern is null.
* @throws IllegalArgumentException if the pattern is invalid.
*/
public void applyLocalizedPattern(String pattern)
{
String localChars = formatData.getLocalPatternChars();
pattern = translateLocalizedPattern(pattern, localChars, standardChars);
applyPattern(pattern);
}
/**
* Translates either from or to a localized variant of the pattern
* string. For example, in the German locale, 't' (for 'tag') is
* used instead of 'd' (for 'date'). This method translates
* a localized pattern (such as 'ttt') to a non-localized pattern
* (such as 'ddd'), or vice versa. Non-localized patterns use
* a standard set of characters, which match those of the U.S. English
* locale.
*
* @param pattern the pattern to translate.
* @param oldChars the old set of characters (used in the pattern).
* @param newChars the new set of characters (which will be used in the
* pattern).
* @return a version of the pattern using the characters in
* newChars.
*/
private String translateLocalizedPattern(String pattern,
String oldChars, String newChars)
{
int len = pattern.length();
StringBuffer buf = new StringBuffer(len);
boolean quoted = false;
for (int i = 0; i < len; i++)
{
char ch = pattern.charAt(i);
if (ch == '\'')
quoted = ! quoted;
if (! quoted)
{
int j = oldChars.indexOf(ch);
if (j >= 0)
ch = newChars.charAt(j);
}
buf.append(ch);
}
return buf.toString();
}
/**
* Returns the start of the century used for two digit years.
*
* @return A Date representing the start of the century
* for two digit years.
*/
public Date get2DigitYearStart()
{
return defaultCenturyStart;
}
/**
* Sets the start of the century used for two digit years.
*
* @param date A Date representing the start of the century for
* two digit years.
*/
public void set2DigitYearStart(Date date)
{
defaultCenturyStart = date;
calendar.clear();
calendar.setTime(date);
int year = calendar.get(Calendar.YEAR);
defaultCentury = year - (year % 100);
}
/**
* This method returns a copy of the format symbol information used
* for parsing and formatting dates.
*
* @return a copy of the date format symbols.
*/
public DateFormatSymbols getDateFormatSymbols()
{
return (DateFormatSymbols) formatData.clone();
}
/**
* This method sets the format symbols information used for parsing
* and formatting dates.
*
* @param formatData The date format symbols.
* @throws NullPointerException if formatData is null.
*/
public void setDateFormatSymbols(DateFormatSymbols formatData)
{
if (formatData == null)
{
throw new
NullPointerException("The supplied format data was null.");
}
this.formatData = formatData;
}
/**
* This methods tests whether the specified object is equal to this
* object. This will be true if and only if the specified object:
* *
null.SimpleDateFormat.DateFormat)
* level.true if the specified object is equal to this object,
* false otherwise.
*/
public boolean equals(Object o)
{
if (!super.equals(o))
return false;
if (!(o instanceof SimpleDateFormat))
return false;
SimpleDateFormat sdf = (SimpleDateFormat)o;
if (defaultCentury != sdf.defaultCentury)
return false;
if (!toPattern().equals(sdf.toPattern()))
return false;
if (!getDateFormatSymbols().equals(sdf.getDateFormatSymbols()))
return false;
return true;
}
/**
* This method returns a hash value for this object.
*
* @return A hash value for this object.
*/
public int hashCode()
{
return super.hashCode() ^ toPattern().hashCode() ^ defaultCentury ^
getDateFormatSymbols().hashCode();
}
/**
* Formats the date input according to the format string in use,
* appending to the specified StringBuffer. The input StringBuffer
* is returned as output for convenience.
*/
private void formatWithAttribute(Date date, FormatBuffer buffer, FieldPosition pos)
{
String temp;
AttributedCharacterIterator.Attribute attribute;
calendar.setTime(date);
// go through vector, filling in fields where applicable, else toString
Iterator iter = tokens.iterator();
while (iter.hasNext())
{
Object o = iter.next();
if (o instanceof CompiledField)
{
CompiledField cf = (CompiledField) o;
int beginIndex = buffer.length();
switch (cf.getField())
{
case ERA_FIELD:
buffer.append (formatData.eras[calendar.get (Calendar.ERA)], DateFormat.Field.ERA);
break;
case YEAR_FIELD:
// If we have two digits, then we truncate. Otherwise, we
// use the size of the pattern, and zero pad.
buffer.setDefaultAttribute (DateFormat.Field.YEAR);
if (cf.getSize() == 2)
{
temp = "00"+String.valueOf (calendar.get (Calendar.YEAR));
buffer.append (temp.substring (temp.length() - 2));
}
else
withLeadingZeros (calendar.get (Calendar.YEAR), cf.getSize(), buffer);
break;
case MONTH_FIELD:
buffer.setDefaultAttribute (DateFormat.Field.MONTH);
if (cf.getSize() < 3)
withLeadingZeros (calendar.get (Calendar.MONTH) + 1, cf.getSize(), buffer);
else if (cf.getSize() < 4)
buffer.append (formatData.shortMonths[calendar.get (Calendar.MONTH)]);
else
buffer.append (formatData.months[calendar.get (Calendar.MONTH)]);
break;
case DATE_FIELD:
buffer.setDefaultAttribute (DateFormat.Field.DAY_OF_MONTH);
withLeadingZeros (calendar.get (Calendar.DATE), cf.getSize(), buffer);
break;
case HOUR_OF_DAY1_FIELD: // 1-24
buffer.setDefaultAttribute(DateFormat.Field.HOUR_OF_DAY1);
withLeadingZeros ( ((calendar.get (Calendar.HOUR_OF_DAY) + 23) % 24) + 1,
cf.getSize(), buffer);
break;
case HOUR_OF_DAY0_FIELD: // 0-23
buffer.setDefaultAttribute (DateFormat.Field.HOUR_OF_DAY0);
withLeadingZeros (calendar.get (Calendar.HOUR_OF_DAY), cf.getSize(), buffer);
break;
case MINUTE_FIELD:
buffer.setDefaultAttribute (DateFormat.Field.MINUTE);
withLeadingZeros (calendar.get (Calendar.MINUTE),
cf.getSize(), buffer);
break;
case SECOND_FIELD:
buffer.setDefaultAttribute (DateFormat.Field.SECOND);
withLeadingZeros(calendar.get (Calendar.SECOND),
cf.getSize(), buffer);
break;
case MILLISECOND_FIELD:
buffer.setDefaultAttribute (DateFormat.Field.MILLISECOND);
withLeadingZeros (calendar.get (Calendar.MILLISECOND), cf.getSize(), buffer);
break;
case DAY_OF_WEEK_FIELD:
buffer.setDefaultAttribute (DateFormat.Field.DAY_OF_WEEK);
if (cf.getSize() < 4)
buffer.append (formatData.shortWeekdays[calendar.get (Calendar.DAY_OF_WEEK)]);
else
buffer.append (formatData.weekdays[calendar.get (Calendar.DAY_OF_WEEK)]);
break;
case DAY_OF_YEAR_FIELD:
buffer.setDefaultAttribute (DateFormat.Field.DAY_OF_YEAR);
withLeadingZeros (calendar.get (Calendar.DAY_OF_YEAR), cf.getSize(), buffer);
break;
case DAY_OF_WEEK_IN_MONTH_FIELD:
buffer.setDefaultAttribute (DateFormat.Field.DAY_OF_WEEK_IN_MONTH);
withLeadingZeros (calendar.get (Calendar.DAY_OF_WEEK_IN_MONTH),
cf.getSize(), buffer);
break;
case WEEK_OF_YEAR_FIELD:
buffer.setDefaultAttribute (DateFormat.Field.WEEK_OF_YEAR);
withLeadingZeros (calendar.get (Calendar.WEEK_OF_YEAR),
cf.getSize(), buffer);
break;
case WEEK_OF_MONTH_FIELD:
buffer.setDefaultAttribute (DateFormat.Field.WEEK_OF_MONTH);
withLeadingZeros (calendar.get (Calendar.WEEK_OF_MONTH),
cf.getSize(), buffer);
break;
case AM_PM_FIELD:
buffer.setDefaultAttribute (DateFormat.Field.AM_PM);
buffer.append (formatData.ampms[calendar.get (Calendar.AM_PM)]);
break;
case HOUR1_FIELD: // 1-12
buffer.setDefaultAttribute (DateFormat.Field.HOUR1);
withLeadingZeros (((calendar.get (Calendar.HOUR) + 11) % 12) + 1,
cf.getSize(), buffer);
break;
case HOUR0_FIELD: // 0-11
buffer.setDefaultAttribute (DateFormat.Field.HOUR0);
withLeadingZeros (calendar.get (Calendar.HOUR), cf.getSize(), buffer);
break;
case TIMEZONE_FIELD:
buffer.setDefaultAttribute (DateFormat.Field.TIME_ZONE);
TimeZone zone = calendar.getTimeZone();
boolean isDST = calendar.get (Calendar.DST_OFFSET) != 0;
// FIXME: XXX: This should be a localized time zone.
String zoneID = zone.getDisplayName
(isDST, cf.getSize() > 3 ? TimeZone.LONG : TimeZone.SHORT);
buffer.append (zoneID);
break;
case RFC822_TIMEZONE_FIELD:
buffer.setDefaultAttribute(DateFormat.Field.RFC822_TIME_ZONE);
int pureMinutes = (calendar.get(Calendar.ZONE_OFFSET) +
calendar.get(Calendar.DST_OFFSET)) / (1000 * 60);
String sign = (pureMinutes < 0) ? "-" : "+";
int hours = pureMinutes / 60;
int minutes = pureMinutes % 60;
buffer.append(sign);
withLeadingZeros(hours, 2, buffer);
withLeadingZeros(minutes, 2, buffer);
break;
default:
throw new IllegalArgumentException ("Illegal pattern character " +
cf.getCharacter());
}
if (pos != null && (buffer.getDefaultAttribute() == pos.getFieldAttribute()
|| cf.getField() == pos.getField()))
{
pos.setBeginIndex(beginIndex);
pos.setEndIndex(buffer.length());
}
}
else
{
buffer.append(o.toString(), null);
}
}
}
public StringBuffer format(Date date, StringBuffer buffer, FieldPosition pos)
{
formatWithAttribute(date, new StringFormatBuffer (buffer), pos);
return buffer;
}
public AttributedCharacterIterator formatToCharacterIterator(Object date)
throws IllegalArgumentException
{
if (date == null)
throw new NullPointerException("null argument");
if (!(date instanceof Date))
throw new IllegalArgumentException("argument should be an instance of java.util.Date");
AttributedFormatBuffer buf = new AttributedFormatBuffer();
formatWithAttribute((Date)date, buf,
null);
buf.sync();
return new FormatCharacterIterator(buf.getBuffer().toString(),
buf.getRanges(),
buf.getAttributes());
}
private void withLeadingZeros(int value, int length, FormatBuffer buffer)
{
String valStr = String.valueOf(value);
for (length -= valStr.length(); length > 0; length--)
buffer.append('0');
buffer.append(valStr);
}
private boolean expect(String source, ParsePosition pos, char ch)
{
int x = pos.getIndex();
boolean r = x < source.length() && source.charAt(x) == ch;
if (r)
pos.setIndex(x + 1);
else
pos.setErrorIndex(x);
return r;
}
/**
* This method parses the specified string into a date.
*
* @param dateStr The date string to parse.
* @param pos The input and output parse position
*
* @return The parsed date, or null if the string cannot be
* parsed.
*/
public Date parse (String dateStr, ParsePosition pos)
{
int fmt_index = 0;
int fmt_max = pattern.length();
calendar.clear();
boolean saw_timezone = false;
int quote_start = -1;
boolean is2DigitYear = false;
try
{
for (; fmt_index < fmt_max; ++fmt_index)
{
char ch = pattern.charAt(fmt_index);
if (ch == '\'')
{
int index = pos.getIndex();
if (fmt_index < fmt_max - 1
&& pattern.charAt(fmt_index + 1) == '\'')
{
if (! expect (dateStr, pos, ch))
return null;
++fmt_index;
}
else
quote_start = quote_start < 0 ? fmt_index : -1;
continue;
}
if (quote_start != -1
|| ((ch < 'a' || ch > 'z')
&& (ch < 'A' || ch > 'Z')))
{
if (! expect (dateStr, pos, ch))
return null;
continue;
}
// We've arrived at a potential pattern character in the
// pattern.
int fmt_count = 1;
while (++fmt_index < fmt_max && pattern.charAt(fmt_index) == ch)
{
++fmt_count;
}
// We might need to limit the number of digits to parse in
// some cases. We look to the next pattern character to
// decide.
boolean limit_digits = false;
if (fmt_index < fmt_max
&& standardChars.indexOf(pattern.charAt(fmt_index)) >= 0)
limit_digits = true;
--fmt_index;
// We can handle most fields automatically: most either are
// numeric or are looked up in a string vector. In some cases
// we need an offset. When numeric, `offset' is added to the
// resulting value. When doing a string lookup, offset is the
// initial index into the string array.
int calendar_field;
boolean is_numeric = true;
int offset = 0;
boolean maybe2DigitYear = false;
boolean oneBasedHour = false;
boolean oneBasedHourOfDay = false;
Integer simpleOffset;
String[] set1 = null;
String[] set2 = null;
switch (ch)
{
case 'd':
calendar_field = Calendar.DATE;
break;
case 'D':
calendar_field = Calendar.DAY_OF_YEAR;
break;
case 'F':
calendar_field = Calendar.DAY_OF_WEEK_IN_MONTH;
break;
case 'E':
is_numeric = false;
offset = 1;
calendar_field = Calendar.DAY_OF_WEEK;
set1 = formatData.getWeekdays();
set2 = formatData.getShortWeekdays();
break;
case 'w':
calendar_field = Calendar.WEEK_OF_YEAR;
break;
case 'W':
calendar_field = Calendar.WEEK_OF_MONTH;
break;
case 'M':
calendar_field = Calendar.MONTH;
if (fmt_count <= 2)
offset = -1;
else
{
is_numeric = false;
set1 = formatData.getMonths();
set2 = formatData.getShortMonths();
}
break;
case 'y':
calendar_field = Calendar.YEAR;
if (fmt_count <= 2)
maybe2DigitYear = true;
break;
case 'K':
calendar_field = Calendar.HOUR;
break;
case 'h':
calendar_field = Calendar.HOUR;
oneBasedHour = true;
break;
case 'H':
calendar_field = Calendar.HOUR_OF_DAY;
break;
case 'k':
calendar_field = Calendar.HOUR_OF_DAY;
oneBasedHourOfDay = true;
break;
case 'm':
calendar_field = Calendar.MINUTE;
break;
case 's':
calendar_field = Calendar.SECOND;
break;
case 'S':
calendar_field = Calendar.MILLISECOND;
break;
case 'a':
is_numeric = false;
calendar_field = Calendar.AM_PM;
set1 = formatData.getAmPmStrings();
break;
case 'z':
case 'Z':
// We need a special case for the timezone, because it
// uses a different data structure than the other cases.
is_numeric = false;
calendar_field = Calendar.ZONE_OFFSET;
String[][] zoneStrings = formatData.getZoneStrings();
int zoneCount = zoneStrings.length;
int index = pos.getIndex();
boolean found_zone = false;
simpleOffset = computeOffset(dateStr.substring(index), pos);
if (simpleOffset != null)
{
found_zone = true;
saw_timezone = true;
calendar.set(Calendar.DST_OFFSET, 0);
offset = simpleOffset.intValue();
}
else
{
for (int j = 0; j < zoneCount; j++)
{
String[] strings = zoneStrings[j];
int k;
for (k = 0; k < strings.length; ++k)
{
if (dateStr.startsWith(strings[k], index))
break;
}
if (k != strings.length)
{
found_zone = true;
saw_timezone = true;
TimeZone tz = TimeZone.getTimeZone (strings[0]);
// Check if it's a DST zone or ordinary
if(k == 3 || k == 4)
calendar.set (Calendar.DST_OFFSET, tz.getDSTSavings());
else
calendar.set (Calendar.DST_OFFSET, 0);
offset = tz.getRawOffset ();
pos.setIndex(index + strings[k].length());
break;
}
}
}
if (! found_zone)
{
pos.setErrorIndex(pos.getIndex());
return null;
}
break;
default:
pos.setErrorIndex(pos.getIndex());
return null;
}
// Compute the value we should assign to the field.
int value;
int index = -1;
if (is_numeric)
{
numberFormat.setMinimumIntegerDigits(fmt_count);
if (limit_digits)
numberFormat.setMaximumIntegerDigits(fmt_count);
if (maybe2DigitYear)
index = pos.getIndex();
Number n = numberFormat.parse(dateStr, pos);
if (pos == null || ! (n instanceof Long))
return null;
value = n.intValue() + offset;
}
else if (set1 != null)
{
index = pos.getIndex();
int i;
boolean found = false;
for (i = offset; i < set1.length; ++i)
{
if (set1[i] != null)
if (dateStr.toUpperCase().startsWith(set1[i].toUpperCase(),
index))
{
found = true;
pos.setIndex(index + set1[i].length());
break;
}
}
if (!found && set2 != null)
{
for (i = offset; i < set2.length; ++i)
{
if (set2[i] != null)
if (dateStr.toUpperCase().startsWith(set2[i].toUpperCase(),
index))
{
found = true;
pos.setIndex(index + set2[i].length());
break;
}
}
}
if (!found)
{
pos.setErrorIndex(index);
return null;
}
value = i;
}
else
value = offset;
if (maybe2DigitYear)
{
// Parse into default century if the numeric year string has
// exactly 2 digits.
int digit_count = pos.getIndex() - index;
if (digit_count == 2)
{
is2DigitYear = true;
value += defaultCentury;
}
}
// Calendar uses 0-based hours.
// I.e. 00:00 AM is midnight, not 12 AM or 24:00
if (oneBasedHour && value == 12)
value = 0;
if (oneBasedHourOfDay && value == 24)
value = 0;
// Assign the value and move on.
calendar.set(calendar_field, value);
}
if (is2DigitYear)
{
// Apply the 80-20 heuristic to dermine the full year based on
// defaultCenturyStart.
int year = calendar.get(Calendar.YEAR);
if (calendar.getTime().compareTo(defaultCenturyStart) < 0)
calendar.set(Calendar.YEAR, year + 100);
}
if (! saw_timezone)
{
// Use the real rules to determine whether or not this
// particular time is in daylight savings.
calendar.clear (Calendar.DST_OFFSET);
calendar.clear (Calendar.ZONE_OFFSET);
}
return calendar.getTime();
}
catch (IllegalArgumentException x)
{
pos.setErrorIndex(pos.getIndex());
return null;
}
}
/**
*
* Computes the time zone offset in milliseconds
* relative to GMT, based on the supplied
* String representation.
*
* The supplied String must be a three
* or four digit signed number, with an optional 'GMT'
* prefix. The first one or two digits represents the hours,
* while the last two represent the minutes. The
* two sets of digits can optionally be separated by
* ':'. The mandatory sign prefix (either '+' or '-')
* indicates the direction of the offset from GMT.
*
* For example, 'GMT+0200' specifies 2 hours after * GMT, while '-05:00' specifies 5 hours prior to * GMT. The special case of 'GMT' alone can be used * to represent the offset, 0. *
*
* If the String can not be parsed,
* the result will be null. The resulting offset
* is wrapped in an Integer object, in
* order to allow such failure to be represented.
*
SimpleDateFormat. The copy contains
* clones of the formatting symbols and the 2-digit
* year century start date.
*/
public Object clone()
{
SimpleDateFormat clone = (SimpleDateFormat) super.clone();
clone.setDateFormatSymbols((DateFormatSymbols) formatData.clone());
clone.set2DigitYearStart((Date) defaultCenturyStart.clone());
return clone;
}
}