/*
*
*
* Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program 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 version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package com.sun.j2me.global;
import java.util.Calendar;
import java.util.TimeZone;
import javax.microedition.global.Formatter;
/**
* <code>DateTimeFormat</code> is a concrete class for formatting dates in a
* locale-sensitive manner. It allows for formatting (date -> text). <p>
*
* <code>DateTimeFormat</code> allows you to start by choosing one of
* predefined patterns for date-time formatting passing appropriate style to
* factory method <code>getInstance(style, locale)</code>.
* <table>
*
* <tr>
*
* <td>
* a
* </td>
*
* <td>
* am/pm
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* H
* </td>
*
* <td>
* hour in day 0-23
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* h
* </td>
*
* <td>
* hour in am/pm 0-11
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* K
* </td>
*
* <td>
* hour in day 1-24
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* k
* </td>
*
* <td>
* hour in am/pm 1-12
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* m
* </td>
*
* <td>
* minute 0-59
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* s
* </td>
*
* <td>
* second 0-59
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* d
* </td>
*
* <td>
* day in month (number)
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* dd
* </td>
*
* <td>
* day in month (number 2 digits)
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* EE
* </td>
*
* <td>
* day in week short "Mon"
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* EEEE
* </td>
*
* <td>
* day in week long "Monday"
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* M
* </td>
*
* <td>
* month in year (number)
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* MM
* </td>
*
* <td>
* month in year (number 2 digits)
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* MMM
* </td>
*
* <td>
* month in year short "Oct"
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* MMMM
* </td>
*
* <td>
* month in year long "October"
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* yy
* </td>
*
* <td>
* year short "05"
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* yyyy
* </td>
*
* <td>
* year long "2005"
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* G
* </td>
*
* <td>
* era
* </td>
*
* </tr>
*
* <tr>
*
* <td>
* z
* </td>
*
* <td>
* timezone
* </td>
*
* </tr>
*
* </table>
*
*
*/
public class DateTimeFormat {
/**
* Holds initialized instance of <code>DateFormatSymbols</code> which
* encapsulate locale-dependent information like names of days in week,
* months etc.
*/
private DateFormatSymbols symbols;
/**
* Style of date/time formatting.
*
* @see Formatter#TIME_LONG
* @see Formatter#TIME_SHORT
* @see Formatter#DATE_LONG
* @see Formatter#DATE_SHORT
* @see Formatter#DATETIME_LONG
* @see Formatter#DATETIME_SHORT
*/
private int style;
/**
* Creates new <code>DateTimeFormat</code> object. It is assumed that
* <code>style</code> contains correct value and <code>symbols</code>
* refers to properly initialized <code>DateFormatSymbols</code> object.
*
* @param style predefined date/time style
* @param symbols object encapsulating localized DateTime symbols
*/
public DateTimeFormat(int style, DateFormatSymbols symbols) {
this.style = style;
this.symbols = symbols;
}
/**
* Formats date/time with the current <code>style</code>.
*
* @param calendar date/time to format
* @param nf integer instance of <code>NumberFormat</code> to
* perform formatting of integer date and time values
* @return formatted string
*/
protected String format(Calendar calendar, NumberFormat nf) {
StringBuffer appendTo = new StringBuffer();
StringBuffer pattern = new StringBuffer(symbols.patterns[style]);
nf.setGroupingUsed(false);
char c;
int value;
int digits;
if (style == Formatter.DATETIME_SHORT) {
// date first paremeter, time second
pattern = new StringBuffer(MessageFormat.format(
symbols.patterns[style],
new String[] {symbols.patterns[Formatter.DATE_SHORT],
symbols.patterns[Formatter.TIME_SHORT]}));
} else if (style == Formatter.DATETIME_LONG) {
pattern = new StringBuffer(MessageFormat.format(
symbols.patterns[style],
new String[] {symbols.patterns[Formatter.DATE_LONG],
symbols.patterns[Formatter.TIME_LONG]}));
}
for (int i = 0; i < pattern.length(); i++) {
c = pattern.charAt(i);
switch (c) {
case 'a':
// AM or PM symbol
int ampm = calendar.get(Calendar.AM_PM);
appendTo.append(symbols.ampms[ampm == Calendar.AM ? 0 : 1]);
break;
case 'H':
// Hours in 24-hour mode 0 - based
value = calendar.get(Calendar.HOUR_OF_DAY);
digits = ((i + 1) < pattern.length() &&
pattern.charAt(i + 1) == 'H') ? 2 : 1;
nf.setMinimumIntegerDigits(digits);
appendTo.append(nf.format(value));
i += digits - 1;
break;
case 'h':
// Hours in 12-hour mode, 1 - based
value = calendar.get(Calendar.HOUR);
digits = ((i + 1) < pattern.length() &&
pattern.charAt(i + 1) == 'h') ? 2 : 1;
nf.setMinimumIntegerDigits(digits);
appendTo.append(nf.format(value));
i += digits - 1;
break;
case 'K':
// Hours in 12-hour mode 0 - based
value = calendar.get(Calendar.HOUR_OF_DAY);
value = value>12 ? value % 12 : value; // noon is 12 midnight is 0
digits = ((i + 1) < pattern.length() &&
pattern.charAt(i + 1) == 'K') ? 2 : 1;
nf.setMinimumIntegerDigits(digits);
appendTo.append(nf.format(value));
i += digits - 1;
break;
case 'k':
// Hours in 24-hour mode 1 based
value = calendar.get(Calendar.HOUR_OF_DAY);
value = (value == 0) ? 24 : value;
digits = ((i + 1) < pattern.length() &&
pattern.charAt(i + 1) == 'k') ? 2 : 1;
nf.setMinimumIntegerDigits(digits);
appendTo.append(nf.format(value));
i += digits - 1;
break;
case 'm':
// Minutes
value = calendar.get(Calendar.MINUTE);
digits = ((i + 1) < pattern.length() &&
pattern.charAt(i + 1) == 'm') ? 2 : 1;
nf.setMinimumIntegerDigits(digits);
appendTo.append(nf.format(value));
i += digits - 1;
break;
case 's':
// Seconds
value = calendar.get(Calendar.SECOND);
digits = ((i + 1) < pattern.length() &&
pattern.charAt(i + 1) == 's') ? 2 : 1;
nf.setMinimumIntegerDigits(digits);
appendTo.append(nf.format(value));
i += digits - 1;
break;
case 'E':
// Long or short weekday name
if ((i + 3) < pattern.length() &&
pattern.charAt(i + 1) == 'E' &&
pattern.charAt(i + 2) == 'E' &&
pattern.charAt(i + 3) == 'E') {
// long day of week name
value = calendar.get(Calendar.DAY_OF_WEEK);
appendTo.append(symbols.weekDays[value]);
i += 3;
} else if ((i + 1) < pattern.length() &&
pattern.charAt(i + 1) == 'E') {
// short day of week name
value = calendar.get(Calendar.DAY_OF_WEEK);
appendTo.append(symbols.shortWeekDays[value]);
i += 1;
}
break;
case 'd':
// Numeric day of month
if ((i + 1) < pattern.length() &&
pattern.charAt(i + 1) == 'd') {
// numeric day 2 digits
value = calendar.get(Calendar.DAY_OF_MONTH);
nf.setMinimumIntegerDigits(2);
appendTo.append(nf.format(value));
i += 1;
} else {
// numeric day 1 digit
value = calendar.get(Calendar.DAY_OF_MONTH);
nf.setMinimumIntegerDigits(1);
appendTo.append(nf.format(value));
}
break;
case 'M':
// Long or short month name or numeric month
if ((i + 3) < pattern.length() &&
pattern.charAt(i + 1) == 'M' &&
pattern.charAt(i + 2) == 'M' &&
pattern.charAt(i + 3) == 'M') {
// long month name
value = calendar.get(Calendar.MONTH);
appendTo.append(symbols.months[value]);
i += 3;
} else if ((i + 2) < pattern.length() &&
pattern.charAt(i + 1) == 'M' &&
pattern.charAt(i + 2) == 'M') {
// short month name
value = calendar.get(Calendar.MONTH);
appendTo.append(symbols.shortMonths[value]);
i += 2;
} else if ((i + 1) < pattern.length() &&
pattern.charAt(i + 1) == 'M') {
value = calendar.get(Calendar.MONTH) + 1;
nf.setMinimumIntegerDigits(2);
appendTo.append(nf.format(value));
i += 1;
} else {
value = calendar.get(Calendar.MONTH) + 1;
nf.setMinimumIntegerDigits(1);
appendTo.append(nf.format(value));
}
break;
case 'y':
// Long or short year
value = calendar.get(Calendar.YEAR);
if ((i + 3) < pattern.length() &&
pattern.charAt(i + 1) == 'y' &&
pattern.charAt(i + 2) == 'y' &&
pattern.charAt(i + 3) == 'y') {
// long year
nf.setMinimumIntegerDigits(4);
appendTo.append(nf.format(value));
i += 3;
} else if ((i + 1) < pattern.length() &&
pattern.charAt(i + 1) == 'y') {
// short year
nf.setMinimumIntegerDigits(2);
String y = nf.format(value);
appendTo.append(y.substring(y.length() - 2,
y.length()));
i += 1;
}
break;
/*
* case 'G': // not in midp
* value = calendar.get(Calendar.ERA);
* appendTo.append(symbols.eras[value]);
* break;
*/
case 'z':
// Time zone
TimeZone tzone = calendar.getTimeZone();
if (tzone == null) {
break;
}
int offset = tzone.getRawOffset();
if (offset == 0) {
appendTo.append('Z');
} else {
offset /= 3600000;
if (offset >= 0) {
appendTo.append('+');
} else {
appendTo.append('-');
offset = -offset;
}
if (offset < 10) {
appendTo.append('0');
}
appendTo.append(offset);
appendTo.append(":00");
}
break;
default:
appendTo.append(c);
}
}
// for
return appendTo.toString();
}
}
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