mirror of git://gcc.gnu.org/git/gcc.git
1324 lines
45 KiB
Java
1324 lines
45 KiB
Java
/* SimpleDateFormat.java -- A class for parsing/formating simple
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date constructs
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Copyright (C) 1998, 1999, 2000, 2001, 2003, 2004, 2005
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Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.text;
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import gnu.java.lang.CPStringBuilder;
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import gnu.java.text.AttributedFormatBuffer;
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import gnu.java.text.FormatBuffer;
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import gnu.java.text.FormatCharacterIterator;
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import gnu.java.text.StringFormatBuffer;
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import java.io.IOException;
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import java.io.InvalidObjectException;
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import java.io.ObjectInputStream;
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import java.util.ArrayList;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.GregorianCalendar;
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import java.util.Iterator;
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import java.util.Locale;
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import java.util.TimeZone;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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/**
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* SimpleDateFormat provides convenient methods for parsing and formatting
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* dates using Gregorian calendars (see java.util.GregorianCalendar).
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* This class is not thread-safe; external synchronisation should be applied
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* if an instance is to be accessed from multiple threads.
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*/
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public class SimpleDateFormat extends DateFormat
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{
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/**
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* This class is used by <code>SimpleDateFormat</code> as a
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* compiled representation of a format string. The field
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* ID, size, and character used are stored for each sequence
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* of pattern characters.
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*/
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private class CompiledField
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{
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/**
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* The ID of the field within the local pattern characters.
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* Package private for use in out class.
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*/
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int field;
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/**
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* The size of the character sequence.
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* Package private for use in out class.
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*/
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int size;
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/**
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* The character used.
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*/
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private char character;
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/**
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* Constructs a compiled field using the
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* the given field ID, size and character
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* values.
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*
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* @param f the field ID.
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* @param s the size of the field.
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* @param c the character used.
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*/
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public CompiledField(int f, int s, char c)
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{
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field = f;
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size = s;
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character = c;
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}
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/**
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* Retrieves the ID of the field relative to
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* the local pattern characters.
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*/
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public int getField()
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{
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return field;
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}
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/**
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* Retrieves the size of the character sequence.
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*/
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public int getSize()
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{
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return size;
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}
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/**
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* Retrieves the character used in the sequence.
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*/
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public char getCharacter()
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{
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return character;
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}
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/**
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* Returns a <code>String</code> representation
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* of the compiled field, primarily for debugging
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* purposes.
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*
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* @return a <code>String</code> representation.
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*/
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public String toString()
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{
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CPStringBuilder builder;
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builder = new CPStringBuilder(getClass().getName());
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builder.append("[field=");
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builder.append(field);
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builder.append(", size=");
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builder.append(size);
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builder.append(", character=");
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builder.append(character);
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builder.append("]");
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return builder.toString();
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}
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}
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/**
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* A list of <code>CompiledField</code>s and {@code String}s
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* representing the compiled version of the pattern.
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*
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* @see CompiledField
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* @serial Ignored.
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*/
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private transient ArrayList<Object> tokens;
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/**
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* The localised data used in formatting,
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* such as the day and month names in the local
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* language, and the localized pattern characters.
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*
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* @see DateFormatSymbols
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* @serial The localisation data. May not be null.
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*/
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private DateFormatSymbols formatData;
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/**
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* The date representing the start of the century
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* used for interpreting two digit years. For
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* example, 24/10/2004 would cause two digit
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* years to be interpreted as representing
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* the years between 2004 and 2104.
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*
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* @see #get2DigitYearStart()
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* @see #set2DigitYearStart(java.util.Date)
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* @see Date
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* @serial The start date of the century for parsing two digit years.
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* May not be null.
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*/
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private Date defaultCenturyStart;
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/**
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* The year at which interpretation of two
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* digit years starts.
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*
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* @see #get2DigitYearStart()
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* @see #set2DigitYearStart(java.util.Date)
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* @serial Ignored.
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*/
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private transient int defaultCentury;
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/**
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* The non-localized pattern string. This
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* only ever contains the pattern characters
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* stored in standardChars. Localized patterns
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* are translated to this form.
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*
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* @see #applyPattern(String)
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* @see #applyLocalizedPattern(String)
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* @see #toPattern()
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* @see #toLocalizedPattern()
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* @serial The non-localized pattern string. May not be null.
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*/
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private String pattern;
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/**
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* The version of serialized data used by this class.
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* Version 0 only includes the pattern and formatting
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* data. Version 1 adds the start date for interpreting
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* two digit years.
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*
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* @serial This specifies the version of the data being serialized.
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* Version 0 (or no version) specifies just <code>pattern</code>
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* and <code>formatData</code>. Version 1 adds
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* the <code>defaultCenturyStart</code>. This implementation
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* always writes out version 1 data.
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*/
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private int serialVersionOnStream = 1; // 0 indicates JDK1.1.3 or earlier
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/**
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* For compatability.
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*/
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private static final long serialVersionUID = 4774881970558875024L;
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// This string is specified in the root of the CLDR.
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private static final String standardChars = "GyMdkHmsSEDFwWahKzYeugAZvcL";
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/**
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* Represents the position of the RFC822 timezone pattern character
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* in the array of localized pattern characters. In the
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* U.S. locale, this is 'Z'. The value is the offset of the current
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* time from GMT e.g. -0500 would be five hours prior to GMT.
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*/
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private static final int RFC822_TIMEZONE_FIELD = 23;
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/**
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* Reads the serialized version of this object.
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* If the serialized data is only version 0,
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* then the date for the start of the century
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* for interpreting two digit years is computed.
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* The pattern is parsed and compiled following the process
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* of reading in the serialized data.
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*
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* @param stream the object stream to read the data from.
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* @throws IOException if an I/O error occurs.
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* @throws ClassNotFoundException if the class of the serialized data
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* could not be found.
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* @throws InvalidObjectException if the pattern is invalid.
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*/
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private void readObject(ObjectInputStream stream)
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throws IOException, ClassNotFoundException
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{
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stream.defaultReadObject();
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if (serialVersionOnStream < 1)
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{
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computeCenturyStart ();
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serialVersionOnStream = 1;
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}
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else
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// Ensure that defaultCentury gets set.
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set2DigitYearStart(defaultCenturyStart);
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// Set up items normally taken care of by the constructor.
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tokens = new ArrayList<Object>();
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try
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{
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compileFormat(pattern);
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}
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catch (IllegalArgumentException e)
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{
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throw new InvalidObjectException("The stream pattern was invalid.");
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}
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}
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/**
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* Compiles the supplied non-localized pattern into a form
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* from which formatting and parsing can be performed.
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* This also detects errors in the pattern, which will
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* be raised on later use of the compiled data.
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*
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* @param pattern the non-localized pattern to compile.
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* @throws IllegalArgumentException if the pattern is invalid.
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*/
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private void compileFormat(String pattern)
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{
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// Any alphabetical characters are treated as pattern characters
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// unless enclosed in single quotes.
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char thisChar;
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int pos;
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int field;
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CompiledField current = null;
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for (int i = 0; i < pattern.length(); i++)
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{
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thisChar = pattern.charAt(i);
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field = standardChars.indexOf(thisChar);
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if (field == -1)
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{
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current = null;
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if ((thisChar >= 'A' && thisChar <= 'Z')
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|| (thisChar >= 'a' && thisChar <= 'z'))
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{
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// Not a valid letter
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throw new IllegalArgumentException("Invalid letter "
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+ thisChar +
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" encountered at character "
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+ i + ".");
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}
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else if (thisChar == '\'')
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{
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// Quoted text section; skip to next single quote
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pos = pattern.indexOf('\'', i + 1);
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// First look for '' -- meaning a single quote.
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if (pos == i + 1)
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tokens.add("'");
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else
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{
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// Look for the terminating quote. However, if we
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// see a '', that represents a literal quote and
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// we must iterate.
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CPStringBuilder buf = new CPStringBuilder();
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int oldPos = i + 1;
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do
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{
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if (pos == -1)
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throw new IllegalArgumentException("Quotes starting at character "
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+ i +
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" not closed.");
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buf.append(pattern.substring(oldPos, pos));
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if (pos + 1 >= pattern.length()
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|| pattern.charAt(pos + 1) != '\'')
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break;
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buf.append('\'');
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oldPos = pos + 2;
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pos = pattern.indexOf('\'', pos + 2);
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}
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while (true);
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tokens.add(buf.toString());
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}
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i = pos;
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}
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else
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{
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// A special character
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tokens.add(Character.valueOf(thisChar));
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}
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}
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else
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{
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// A valid field
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if ((current != null) && (field == current.field))
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current.size++;
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else
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{
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current = new CompiledField(field, 1, thisChar);
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tokens.add(current);
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}
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}
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}
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}
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/**
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* Returns a string representation of this
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* class.
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*
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* @return a string representation of the <code>SimpleDateFormat</code>
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* instance.
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*/
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public String toString()
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{
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CPStringBuilder output = new CPStringBuilder(getClass().getName());
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output.append("[tokens=");
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output.append(tokens);
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output.append(", formatData=");
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output.append(formatData);
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output.append(", defaultCenturyStart=");
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output.append(defaultCenturyStart);
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output.append(", defaultCentury=");
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output.append(defaultCentury);
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output.append(", pattern=");
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output.append(pattern);
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output.append(", serialVersionOnStream=");
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output.append(serialVersionOnStream);
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output.append(", standardChars=");
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output.append(standardChars);
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output.append("]");
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return output.toString();
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}
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/**
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* Constructs a SimpleDateFormat using the default pattern for
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* the default locale.
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*/
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public SimpleDateFormat()
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{
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/*
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* There does not appear to be a standard API for determining
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* what the default pattern for a locale is, so use package-scope
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* variables in DateFormatSymbols to encapsulate this.
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*/
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super();
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Locale locale = Locale.getDefault();
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calendar = new GregorianCalendar(locale);
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computeCenturyStart();
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tokens = new ArrayList<Object>();
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formatData = new DateFormatSymbols(locale);
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pattern = (formatData.dateFormats[DEFAULT] + ' '
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+ formatData.timeFormats[DEFAULT]);
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compileFormat(pattern);
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numberFormat = NumberFormat.getInstance(locale);
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numberFormat.setGroupingUsed (false);
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numberFormat.setParseIntegerOnly (true);
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numberFormat.setMaximumFractionDigits (0);
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}
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/**
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* Creates a date formatter using the specified non-localized pattern,
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* with the default DateFormatSymbols for the default locale.
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*
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* @param pattern the pattern to use.
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* @throws NullPointerException if the pattern is null.
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* @throws IllegalArgumentException if the pattern is invalid.
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*/
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public SimpleDateFormat(String pattern)
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{
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this(pattern, Locale.getDefault());
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}
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/**
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* Creates a date formatter using the specified non-localized pattern,
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* with the default DateFormatSymbols for the given locale.
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*
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* @param pattern the non-localized pattern to use.
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* @param locale the locale to use for the formatting symbols.
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* @throws NullPointerException if the pattern is null.
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* @throws IllegalArgumentException if the pattern is invalid.
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*/
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public SimpleDateFormat(String pattern, Locale locale)
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{
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super();
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calendar = new GregorianCalendar(locale);
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computeCenturyStart();
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tokens = new ArrayList<Object>();
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formatData = new DateFormatSymbols(locale);
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compileFormat(pattern);
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this.pattern = pattern;
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numberFormat = NumberFormat.getInstance(locale);
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numberFormat.setGroupingUsed (false);
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numberFormat.setParseIntegerOnly (true);
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numberFormat.setMaximumFractionDigits (0);
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}
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/**
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* Creates a date formatter using the specified non-localized
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* pattern. The specified DateFormatSymbols will be used when
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* formatting.
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*
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* @param pattern the non-localized pattern to use.
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* @param formatData the formatting symbols to use.
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* @throws NullPointerException if the pattern or formatData is null.
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* @throws IllegalArgumentException if the pattern is invalid.
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*/
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public SimpleDateFormat(String pattern, DateFormatSymbols formatData)
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{
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super();
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calendar = new GregorianCalendar();
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computeCenturyStart ();
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tokens = new ArrayList<Object>();
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if (formatData == null)
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throw new NullPointerException("formatData");
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this.formatData = formatData;
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compileFormat(pattern);
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this.pattern = pattern;
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numberFormat = NumberFormat.getInstance();
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numberFormat.setGroupingUsed (false);
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numberFormat.setParseIntegerOnly (true);
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numberFormat.setMaximumFractionDigits (0);
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}
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/**
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* This method returns a string with the formatting pattern being used
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* by this object. This string is unlocalized.
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*
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* @return The format string.
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*/
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public String toPattern()
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{
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return pattern;
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}
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/**
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* This method returns a string with the formatting pattern being used
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* by this object. This string is localized.
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*
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* @return The format string.
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*/
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public String toLocalizedPattern()
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{
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String localChars = formatData.getLocalPatternChars();
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return translateLocalizedPattern(pattern, standardChars, localChars);
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}
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/**
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* This method sets the formatting pattern that should be used by this
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* object. This string is not localized.
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*
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* @param pattern The new format pattern.
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* @throws NullPointerException if the pattern is null.
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* @throws IllegalArgumentException if the pattern is invalid.
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*/
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public void applyPattern(String pattern)
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{
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tokens.clear();
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compileFormat(pattern);
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this.pattern = pattern;
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}
|
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|
|
/**
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* This method sets the formatting pattern that should be used by this
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* object. This string is localized.
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*
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* @param pattern The new format pattern.
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* @throws NullPointerException if the pattern is null.
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* @throws IllegalArgumentException if the pattern is invalid.
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*/
|
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public void applyLocalizedPattern(String pattern)
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{
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String localChars = formatData.getLocalPatternChars();
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pattern = translateLocalizedPattern(pattern, localChars, standardChars);
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applyPattern(pattern);
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}
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|
|
/**
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|
* Translates either from or to a localized variant of the pattern
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|
* string. For example, in the German locale, 't' (for 'tag') is
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|
* used instead of 'd' (for 'date'). This method translates
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|
* a localized pattern (such as 'ttt') to a non-localized pattern
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|
* (such as 'ddd'), or vice versa. Non-localized patterns use
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|
* a standard set of characters, which match those of the U.S. English
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|
* locale.
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|
*
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|
* @param pattern the pattern to translate.
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|
* @param oldChars the old set of characters (used in the pattern).
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|
* @param newChars the new set of characters (which will be used in the
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* pattern).
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|
* @return a version of the pattern using the characters in
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* <code>newChars</code>.
|
|
*/
|
|
private String translateLocalizedPattern(String pattern,
|
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String oldChars, String newChars)
|
|
{
|
|
int len = pattern.length();
|
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CPStringBuilder buf = new CPStringBuilder(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 o 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;
|
|
calendar.setTime(date);
|
|
|
|
// go through vector, filling in fields where applicable, else toString
|
|
Iterator<Object> 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.TIME_ZONE);
|
|
int pureMinutes = (calendar.get(Calendar.ZONE_OFFSET) +
|
|
calendar.get(Calendar.DST_OFFSET)) / (1000 * 60);
|
|
String sign = (pureMinutes < 0) ? "-" : "+";
|
|
pureMinutes = Math.abs(pureMinutes);
|
|
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 == '\'')
|
|
{
|
|
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 (quote_start == -1 && ch == ' ')
|
|
{
|
|
// A single unquoted space in the pattern may match
|
|
// any number of spaces in the input.
|
|
int index = pos.getIndex();
|
|
int save = index;
|
|
while (index < dateStr.length()
|
|
&& Character.isWhitespace(dateStr.charAt(index)))
|
|
++index;
|
|
if (index > save)
|
|
pos.setIndex(index);
|
|
else
|
|
{
|
|
// Didn't see any whitespace.
|
|
pos.setErrorIndex(index);
|
|
return null;
|
|
}
|
|
}
|
|
else 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 (maybe2DigitYear)
|
|
index = pos.getIndex();
|
|
Number n = null;
|
|
if (limit_digits)
|
|
{
|
|
// numberFormat.setMaximumIntegerDigits(fmt_count) may
|
|
// not work as expected. So we explicitly use substring
|
|
// of dateStr.
|
|
int origPos = pos.getIndex();
|
|
pos.setIndex(0);
|
|
n = numberFormat.parse(dateStr.substring(origPos, origPos + fmt_count), pos);
|
|
pos.setIndex(origPos + pos.getIndex());
|
|
}
|
|
else
|
|
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, ParsePosition pos)
|
|
{
|
|
Pattern pattern =
|
|
Pattern.compile("(GMT)?([+-])([012])?([0-9]):?([0-9]{2})");
|
|
Matcher matcher = pattern.matcher(zoneString);
|
|
|
|
// Match from start, but ignore trailing parts
|
|
boolean hasAll = matcher.lookingAt();
|
|
try
|
|
{
|
|
// Do we have at least the sign, hour and minute?
|
|
matcher.group(2);
|
|
matcher.group(4);
|
|
matcher.group(5);
|
|
}
|
|
catch (IllegalStateException ise)
|
|
{
|
|
hasAll = false;
|
|
}
|
|
if (hasAll)
|
|
{
|
|
int sign = matcher.group(2).equals("+") ? 1 : -1;
|
|
int hour = Integer.parseInt(matcher.group(4));
|
|
if (!matcher.group(3).equals(""))
|
|
hour += (Integer.parseInt(matcher.group(3)) * 10);
|
|
int minutes = Integer.parseInt(matcher.group(5));
|
|
|
|
if (hour > 23)
|
|
return null;
|
|
int offset = sign * ((hour * 60) + minutes) * 60000;
|
|
|
|
// advance the index
|
|
pos.setIndex(pos.getIndex() + matcher.end());
|
|
return Integer.valueOf(offset);
|
|
}
|
|
else if (zoneString.startsWith("GMT"))
|
|
{
|
|
pos.setIndex(pos.getIndex() + 3);
|
|
return Integer.valueOf(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;
|
|
}
|
|
|
|
}
|