+++ /dev/null
-/* DateFormat.java -- Class for formatting/parsing date/times
- Copyright (C) 1998, 1999, 2000, 2001 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., 59 Temple Place, Suite 330, Boston, MA
-02111-1307 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 java.util.*;
-
-/**
- * @author Per Bothner <bothner@cygnus.com>
- * @date October 25, 1998.
- */
-/* Written using "Java Class Libraries", 2nd edition, plus online
- * API docs for JDK 1.2 beta from http://www.javasoft.com.
- * Status: Mostly complete; search for FIXME to see omissions.
- */
-
-public abstract class DateFormat extends Format implements Cloneable
-{
- protected Calendar calendar;
- protected NumberFormat numberFormat;
-
- // (Values determined using a test program.)
- public static final int FULL = 0;
- public static final int LONG = 1;
- public static final int MEDIUM = 2;
- public static final int SHORT = 3;
- public static final int DEFAULT = MEDIUM;
-
- /* These constants need to have these exact values. They
- * correspond to index positions within the localPatternChars
- * string for a given locale. For example, the US locale uses
- * the string "GyMdkHmsSEDFwWahKz", where 'G' is the character
- * for era, 'y' for year, and so on down to 'z' for time zone.
- */
- public static final int ERA_FIELD = 0;
- public static final int YEAR_FIELD = 1;
- public static final int MONTH_FIELD = 2;
- public static final int DATE_FIELD = 3;
- public static final int HOUR_OF_DAY1_FIELD = 4;
- public static final int HOUR_OF_DAY0_FIELD = 5;
- public static final int MINUTE_FIELD = 6;
- public static final int SECOND_FIELD = 7;
- public static final int MILLISECOND_FIELD = 8;
- public static final int DAY_OF_WEEK_FIELD = 9;
- public static final int DAY_OF_YEAR_FIELD = 10;
- public static final int DAY_OF_WEEK_IN_MONTH_FIELD = 11;
- public static final int WEEK_OF_YEAR_FIELD = 12;
- public static final int WEEK_OF_MONTH_FIELD = 13;
- public static final int AM_PM_FIELD = 14;
- public static final int HOUR1_FIELD = 15;
- public static final int HOUR0_FIELD = 16;
- public static final int TIMEZONE_FIELD = 17;
-
- /**
- * This method initializes a new instance of <code>DateFormat</code>.
- */
- protected DateFormat ()
- {
- }
-
- /**
- * This method tests this object for equality against the specified object.
- * The two objects will be considered equal if an only if the specified
- * object:
- * <P>
- * <ul>
- * <li>Is not <code>null</code>.
- * <li>Is an instance of <code>DateFormat</code>.
- * <li>Has the same calendar and numberFormat field values as this object.
- * </ul>
- *
- * @param obj The object to test for equality against.
- *
- * @return <code>true</code> if the specified object is equal to this object,
- * <code>false</code> otherwise.
- */
- public boolean equals (Object obj)
- {
- if (! (obj instanceof DateFormat))
- return false;
- DateFormat d = (DateFormat) obj;
- return calendar.equals(d.calendar) && numberFormat.equals(d.numberFormat);
- }
-
- /**
- * This method returns a copy of this object.
- *
- * @return A copy of this object.
- */
- public Object clone ()
- {
- // We know the superclass just call's Object's generic cloner.
- return super.clone ();
- }
-
- /**
- * This method formats the specified <code>Object</code> into a date string
- * and appends it to the specified <code>StringBuffer</code>.
- * The specified object must be an instance of <code>Number</code> or
- * <code>Date</code> or an <code>IllegalArgumentException</code> will be
- * thrown.
- *
- * @param obj The <code>Object</code> to format.
- * @param toAppendTo The <code>StringBuffer</code> to append the resultant
- * <code>String</code> to.
- * @param fieldPosition Is updated to the start and end index of the
- * specified field.
- *
- * @return The <code>StringBuffer</code> supplied on input, with the
- * formatted date/time appended.
- */
- public final StringBuffer format (Object obj,
- StringBuffer buf, FieldPosition pos)
- {
- if (obj instanceof Number)
- obj = new Date(((Number) obj).longValue());
- return format ((Date) obj, buf, pos);
- }
-
- /**
- * Formats the date argument according to the pattern specified.
- *
- * @param date The formatted date.
- */
- public final String format (Date date)
- {
- StringBuffer sb = new StringBuffer ();
- format (date, sb, new FieldPosition (MONTH_FIELD));
- return sb.toString();
- }
-
- /**
- * This method formats a <code>Date</code> into a string and appends it
- * to the specified <code>StringBuffer</code>.
- *
- * @param date The <code>Date</code> value to format.
- * @param toAppendTo The <code>StringBuffer</code> to append the resultant
- * <code>String</code> to.
- * @param fieldPosition Is updated to the start and end index of the
- * specified field.
- *
- * @return The <code>StringBuffer</code> supplied on input, with the
- * formatted date/time appended.
- */
- public abstract StringBuffer format (Date date,
- StringBuffer buf, FieldPosition pos);
-
- /**
- * This method returns a list of available locales supported by this
- * class.
- */
- public static Locale[] getAvailableLocales ()
- {
- // FIXME
- Locale[] l = new Locale[1];
- l[0] = Locale.US;
- return l;
- }
-
- /**
- * This method returns the <code>Calendar</code> object being used by
- * this object to parse/format datetimes.
- *
- * @return The <code>Calendar</code> being used by this object.
- *
- * @see java.util.Calendar
- */
- public Calendar getCalendar ()
- {
- return calendar;
- }
-
- private static final DateFormat computeInstance (int style, Locale loc,
- boolean use_date,
- boolean use_time)
- {
- return computeInstance (style, style, loc, use_date, use_time);
- }
-
- private static final DateFormat computeInstance (int dateStyle,
- int timeStyle,
- Locale loc,
- boolean use_date,
- boolean use_time)
- {
- ResourceBundle res;
- try
- {
- res = ResourceBundle.getBundle("gnu.java.locale.LocaleInformation",
- loc);
- }
- catch (MissingResourceException x)
- {
- res = null;
- }
-
- String pattern = null;
- if (use_date)
- {
- String name, def;
- switch (dateStyle)
- {
- case FULL:
- name = "fullDateFormat";
- def = "EEEE MMMM d, yyyy G";
- break;
- case LONG:
- name = "longDateFormat";
- def = "MMMM d, yyyy";
- break;
- case MEDIUM:
- name = "mediumDateFormat";
- def = "d-MMM-yy";
- break;
- case SHORT:
- name = "shortDateFormat";
- def = "M/d/yy";
- break;
- default:
- throw new IllegalArgumentException ();
- }
- try
- {
- pattern = res == null ? def : res.getString(name);
- }
- catch (MissingResourceException x)
- {
- pattern = def;
- }
- }
-
- if (use_time)
- {
- if (pattern == null)
- pattern = "";
- else
- pattern += " ";
-
- String name, def;
- switch (timeStyle)
- {
- case FULL:
- name = "fullTimeFormat";
- def = "h:mm:ss;S 'o''clock' a z";
- break;
- case LONG:
- name = "longTimeFormat";
- def = "h:mm:ss a z";
- break;
- case MEDIUM:
- name = "mediumTimeFormat";
- def = "h:mm:ss a";
- break;
- case SHORT:
- name = "shortTimeFormat";
- def = "h:mm a";
- break;
- default:
- throw new IllegalArgumentException ();
- }
-
- String s;
- try
- {
- s = res == null ? def : res.getString(name);
- }
- catch (MissingResourceException x)
- {
- s = def;
- }
- pattern += s;
- }
-
- return new SimpleDateFormat (pattern, loc);
- }
-
- /**
- * This method returns an instance of <code>DateFormat</code> that will
- * format using the default formatting style for dates.
- *
- * @return A new <code>DateFormat</code> instance.
- */
- public static final DateFormat getDateInstance ()
- {
- return getDateInstance (DEFAULT, Locale.getDefault());
- }
-
- /**
- * This method returns an instance of <code>DateFormat</code> that will
- * format using the specified formatting style for dates.
- *
- * @param style The type of formatting to perform.
- *
- * @return A new <code>DateFormat</code> instance.
- */
- public static final DateFormat getDateInstance (int style)
- {
- return getDateInstance (style, Locale.getDefault());
- }
-
- /**
- * This method returns an instance of <code>DateFormat</code> that will
- * format using the specified formatting style for dates. The specified
- * localed will be used in place of the default.
- *
- * @param style The type of formatting to perform.
- * @param aLocale The desired locale.
- *
- * @return A new <code>DateFormat</code> instance.
- */
- public static final DateFormat getDateInstance (int style, Locale loc)
- {
- return computeInstance (style, loc, true, false);
- }
-
- /**
- * This method returns a new instance of <code>DateFormat</code> that
- * formats both dates and times using the <code>SHORT</code> style.
- *
- * @return A new <code>DateFormat</code>instance.
- */
- public static final DateFormat getDateTimeInstance ()
- {
- return getDateTimeInstance (DEFAULT, DEFAULT, Locale.getDefault());
- }
-
- /**
- * This method returns a new instance of <code>DateFormat</code> that
- * formats both dates and times using the <code>DEFAULT</code> style.
- *
- * @return A new <code>DateFormat</code>instance.
- */
- public static final DateFormat getDateTimeInstance (int dateStyle,
- int timeStyle)
- {
- return getDateTimeInstance (dateStyle, timeStyle, Locale.getDefault());
- }
-
- /**
- * This method returns a new instance of <code>DateFormat</code> that
- * formats both dates and times using the specified styles.
- *
- * @param dateStyle The desired style for date formatting.
- * @param timeStyle The desired style for time formatting
- *
- * @return A new <code>DateFormat</code>instance.
- */
- public static final DateFormat getDateTimeInstance (int dateStyle,
- int timeStyle,
- Locale loc)
- {
- return computeInstance (dateStyle, timeStyle, loc, true, true);
- }
-
- /**
- * This method returns a new instance of <code>DateFormat</code> that
- * formats both dates and times using the <code>SHORT</code> style.
- *
- * @return A new <code>DateFormat</code>instance.
- */
- public static final DateFormat getInstance ()
- {
- // JCL book says SHORT.
- return getDateTimeInstance (SHORT, SHORT, Locale.getDefault());
- }
-
- /**
- * This method returns the <code>NumberFormat</code> object being used
- * by this object to parse/format time values.
- *
- * @return The <code>NumberFormat</code> in use by this object.
- */
- public NumberFormat getNumberFormat ()
- {
- return numberFormat;
- }
-
- /**
- * This method returns an instance of <code>DateFormat</code> that will
- * format using the default formatting style for times.
- *
- * @return A new <code>DateFormat</code> instance.
- */
- public static final DateFormat getTimeInstance ()
- {
- return getTimeInstance (DEFAULT, Locale.getDefault());
- }
-
- /**
- * This method returns an instance of <code>DateFormat</code> that will
- * format using the specified formatting style for times.
- *
- * @param style The type of formatting to perform.
- *
- * @return A new <code>DateFormat</code> instance.
- */
- public static final DateFormat getTimeInstance (int style)
- {
- return getTimeInstance (style, Locale.getDefault());
- }
-
- /**
- * This method returns an instance of <code>DateFormat</code> that will
- * format using the specified formatting style for times. The specified
- * localed will be used in place of the default.
- *
- * @param style The type of formatting to perform.
- * @param aLocale The desired locale.
- *
- * @return A new <code>DateFormat</code> instance.
- */
- public static final DateFormat getTimeInstance (int style, Locale loc)
- {
- return computeInstance (style, loc, false, true);
- }
-
- /**
- * This method returns the <code>TimeZone</code> object being used by
- * this instance.
- *
- * @return The time zone in use.
- */
- public TimeZone getTimeZone ()
- {
- return calendar.getTimeZone();
- }
-
- /**
- * This method returns a hash value for this object.
- *
- * @return A hash value for this object.
- */
- public int hashCode ()
- {
- int hash = calendar.hashCode();
- if (numberFormat != null)
- hash ^= numberFormat.hashCode();
- return hash;
- }
-
- /**
- * This method indicates whether or not the parsing of date and time
- * values should be done in a lenient value.
- *
- * @return <code>true</code> if date/time parsing is lenient,
- * <code>false</code> otherwise.
- */
- public boolean isLenient ()
- {
- return calendar.isLenient();
- }
-
- /**
- * This method parses the specified date/time string.
- *
- * @return The resultant date.
- *
- * @exception ParseException If the specified string cannot be parsed.
- */
- public Date parse (String source) throws ParseException
- {
- ParsePosition pos = new ParsePosition(0);
- Date result = parse (source, pos);
- if (result == null)
- {
- int index = pos.getErrorIndex();
- if (index < 0)
- index = pos.getIndex();
- throw new ParseException("invalid Date syntax", index);
- }
- return result;
- }
-
- /**
- * This method parses the specified <code>String</code> into a
- * <code>Date</code>. The <code>pos</code> argument contains the
- * starting parse position on method entry and the ending parse
- * position on method exit.
- *
- * @param text The string to parse.
- * @param pos The starting parse position in entry, the ending parse
- * position on exit.
- *
- * @return The parsed date, or <code>null</code> if the string cannot
- * be parsed.
- */
- public abstract Date parse (String source, ParsePosition pos);
-
- /**
- * This method is identical to <code>parse(String, ParsePosition)</code>,
- * but returns its result as an <code>Object</code> instead of a
- * <code>Date</code>.
- *
- * @param source The string to parse.
- * @param pos The starting parse position in entry, the ending parse
- * position on exit.
- *
- * @return The parsed date, or <code>null</code> if the string cannot
- * be parsed.
- */
- public Object parseObject (String source, ParsePosition pos)
- {
- return parse(source, pos);
- }
-
- /**
- * This method specified the <code>Calendar</code> that should be used
- * by this object to parse/format datetimes.
- *
- * @param The new <code>Calendar</code> for this object.
- *
- * @see java.util.Calendar
- */
- public void setCalendar (Calendar calendar)
- {
- this.calendar = calendar;
- }
-
- /**
- * This method specifies whether or not this object should be lenient in
- * the syntax it accepts while parsing date/time values.
- *
- * @param lenient <code>true</code> if parsing should be lenient,
- * <code>false</code> otherwise.
- */
- public void setLenient (boolean lenient)
- {
- calendar.setLenient(lenient);
- }
-
- /**
- * This method specifies the <code>NumberFormat</code> object that should
- * be used by this object to parse/format times.
- *
- * @param The <code>NumberFormat</code> in use by this object.
- */
- public void setNumberFormat (NumberFormat numberFormat)
- {
- this.numberFormat = numberFormat;
- }
-
- /**
- * This method sets the time zone that should be used by this object.
- *
- * @param The new time zone.
- */
- public void setTimeZone (TimeZone timeZone)
- {
- calendar.setTimeZone(timeZone);
- }
-}
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