+++ /dev/null
-/* SimpleDateFormat.java -- A class for parsing/formating simple
- date constructs
- Copyright (C) 1998, 1999, 2000, 2001, 2003, 2004, 2005
- Free Software Foundation, Inc.
-
-This file is part of GNU Classpath.
-
-GNU Classpath is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Classpath is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Classpath; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library. Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module. An independent module is a module which is not derived from
-or based on this library. If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so. If you do not wish to do so, delete this
-exception statement from your version. */
-
-
-package java.text;
-
-import gnu.java.text.AttributedFormatBuffer;
-import gnu.java.text.FormatBuffer;
-import gnu.java.text.FormatCharacterIterator;
-import gnu.java.text.StringFormatBuffer;
-
-import java.io.IOException;
-import java.io.InvalidObjectException;
-import java.io.ObjectInputStream;
-import java.util.ArrayList;
-import java.util.Calendar;
-import java.util.Date;
-import java.util.GregorianCalendar;
-import java.util.Iterator;
-import java.util.Locale;
-import java.util.TimeZone;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
-/**
- * SimpleDateFormat provides convenient methods for parsing and formatting
- * dates using Gregorian calendars (see java.util.GregorianCalendar).
- */
-public class SimpleDateFormat extends DateFormat
-{
- /**
- * This class is used by <code>SimpleDateFormat</code> 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,
- */
- private int field;
-
- /**
- * The size of the character sequence.
- */
- private 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 <code>String</code> representation
- * of the compiled field, primarily for debugging
- * purposes.
- *
- * @return a <code>String</code> 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 <code>CompiledField</code>s,
- * 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 <code>pattern</code>
- * and <code>formatData</code>. Version 1 adds
- * the <code>defaultCenturyStart</code>. 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; i<pattern.length(); i++) {
- thisChar = pattern.charAt(i);
- field = standardChars.indexOf(thisChar);
- if (field == -1) {
- current = null;
- if ((thisChar >= 'A' && thisChar <= 'Z')
- || (thisChar >= 'a' && thisChar <= 'z')) {
- // Not a valid letter
- throw new IllegalArgumentException("Invalid letter " + thisChar +
- "encountered at character " + i
- + ".");
- } else if (thisChar == '\'') {
- // Quoted text section; skip to next single quote
- pos = pattern.indexOf('\'',i+1);
- if (pos == -1) {
- throw new IllegalArgumentException("Quotes starting at character "
- + i + " not closed.");
- }
- if ((pos+1 < pattern.length()) && (pattern.charAt(pos+1) == '\'')) {
- tokens.add(pattern.substring(i+1,pos+1));
- } else {
- tokens.add(pattern.substring(i+1,pos));
- }
- i = pos;
- } else {
- // A special character
- tokens.add(new Character(thisChar));
- }
- } else {
- // A valid field
- if ((current != null) && (field == current.field)) {
- current.size++;
- } else {
- current = new CompiledField(field,1,thisChar);
- tokens.add(current);
- }
- }
- }
- }
-
- /**
- * Returns a string representation of this
- * class.
- *
- * @return a string representation of the <code>SimpleDateFormat</code>
- * 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
- * <code>newChars</code>.
- */
- 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 <code>Date</code> 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 <code>Date</code> 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 <code>formatData</code> 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:
- * <p>
- * <ul>
- * <li>Is not <code>null</code>.</li>
- * <li>Is an instance of <code>SimpleDateFormat</code>.</li>
- * <li>Is equal to this object at the superclass (i.e., <code>DateFormat</code>)
- * level.</li>
- * <li>Has the same formatting pattern.</li>
- * <li>Is using the same formatting symbols.</li>
- * <li>Is using the same century for two digit years.</li>
- * </ul>
- *
- * @param obj The object to compare for equality against.
- *
- * @return <code>true</code> if the specified object is equal to this object,
- * <code>false</code> 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 <code>null</code> 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));
- 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;
- }
- }
-
- /**
- * <p>
- * Computes the time zone offset in milliseconds
- * relative to GMT, based on the supplied
- * <code>String</code> representation.
- * </p>
- * <p>
- * The supplied <code>String</code> 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.
- * </p>
- * <p>
- * 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.
- * </p>
- * <p>
- * If the <code>String</code> can not be parsed,
- * the result will be null. The resulting offset
- * is wrapped in an <code>Integer</code> object, in
- * order to allow such failure to be represented.
- * </p>
- *
- * @param zoneString a string in the form
- * (GMT)? sign hours : minutes
- * where sign = '+' or '-', hours
- * is a one or two digits representing
- * a number between 0 and 23, and
- * minutes is two digits representing
- * a number between 0 and 59.
- * @return the parsed offset, or null if parsing
- * failed.
- */
- private Integer computeOffset(String zoneString)
- {
- Pattern pattern =
- Pattern.compile("(GMT)?([+-])([012])?([0-9]):?([0-9]{2})");
- Matcher matcher = pattern.matcher(zoneString);
- if (matcher.matches())
- {
- int sign = matcher.group(2).equals("+") ? 1 : -1;
- int hour = (Integer.parseInt(matcher.group(3)) * 10)
- + Integer.parseInt(matcher.group(4));
- int minutes = Integer.parseInt(matcher.group(5));
-
- if (hour > 23)
- return null;
-
- int offset = sign * ((hour * 60) + minutes) * 60000;
- return new Integer(offset);
- }
- else if (zoneString.startsWith("GMT"))
- {
- return new Integer(0);
- }
- return null;
- }
-
- // Compute the start of the current century as defined by
- // get2DigitYearStart.
- private void computeCenturyStart()
- {
- int year = calendar.get(Calendar.YEAR);
- calendar.set(Calendar.YEAR, year - 80);
- set2DigitYearStart(calendar.getTime());
- }
-
- /**
- * Returns a copy of this instance of
- * <code>SimpleDateFormat</code>. 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;
- }
-
-}
projects / gcc.git / commitdiff