com.ibm.icu.text.ChineseDateFormat Maven / Gradle / Ivy
// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html#License
/*********************************************************************
* Copyright (C) 2000-2014, International Business Machines Corporation and
* others. All Rights Reserved.
*********************************************************************
*/
package com.ibm.icu.text;
import java.io.InvalidObjectException;
import java.text.FieldPosition;
import java.util.Locale;
import com.ibm.icu.util.Calendar;
import com.ibm.icu.util.ChineseCalendar;
import com.ibm.icu.util.TimeZone;
import com.ibm.icu.util.ULocale;
/**
* A concrete {@link DateFormat} for {@link com.ibm.icu.util.ChineseCalendar}.
* This class handles a ChineseCalendar-specific field,
* ChineseCalendar.IS_LEAP_MONTH. It also redefines the
* handling of two fields, ERA and YEAR. The
* former is displayed numerically, instead of symbolically, since it is
* the numeric cycle number in ChineseCalendar. The latter is
* numeric, as before, but has no special 2-digit Y2K behavior.
*
* With regard to ChineseCalendar.IS_LEAP_MONTH, this
* class handles parsing specially. If no string symbol is found at all,
* this is taken as equivalent to an IS_LEAP_MONTH value of
* zero. This allows formats to display a special string (e.g., "*") for
* leap months, but no string for normal months.
*
*
Summary of field changes vs. {@link SimpleDateFormat}:
* Symbol Meaning Presentation Example
* ------ ------- ------------ -------
* G cycle (Number) 78
* y year of cycle (1..60) (Number) 17
* l is leap month (Text) 4637
*
*
* @see com.ibm.icu.util.ChineseCalendar
* @see ChineseDateFormatSymbols
* @author Alan Liu
* @deprecated ICU 50 Use SimpleDateFormat instead.
*/
@Deprecated
public class ChineseDateFormat extends SimpleDateFormat {
// Generated by serialver from JDK 1.4.1_01
static final long serialVersionUID = -4610300753104099899L;
// TODO Finish the constructors
/**
* Construct a ChineseDateFormat from a date format pattern and locale
* @param pattern the pattern
* @param locale the locale
* @deprecated ICU 50
*/
@Deprecated
public ChineseDateFormat(String pattern, Locale locale) {
this(pattern, ULocale.forLocale(locale));
}
/**
* Construct a ChineseDateFormat from a date format pattern and locale
* @param pattern the pattern
* @param locale the locale
* @deprecated ICU 50
*/
@Deprecated
public ChineseDateFormat(String pattern, ULocale locale) {
this(pattern, null, locale);
}
/**
* Construct a ChineseDateFormat from a date format pattern, numbering system override and locale
* @param pattern the pattern
* @param override The override string. A numbering system override string can take one of the following forms:
* 1). If just a numbering system name is specified, it applies to all numeric fields in the date format pattern.
* 2). To specify an alternate numbering system on a field by field basis, use the field letters from the pattern
* followed by an = sign, followed by the numbering system name. For example, to specify that just the year
* be formatted using Hebrew digits, use the override "y=hebr". Multiple overrides can be specified in a single
* string by separating them with a semi-colon. For example, the override string "m=thai;y=deva" would format using
* Thai digits for the month and Devanagari digits for the year.
* @param locale the locale
* @deprecated ICU 50
*/
@Deprecated
public ChineseDateFormat(String pattern, String override, ULocale locale) {
super(pattern, new ChineseDateFormatSymbols(locale),
new ChineseCalendar(TimeZone.getDefault(), locale), locale, true, override);
}
// NOTE: This API still exists; we just inherit it from SimpleDateFormat
// as of ICU 3.0
// /**
// * @stable ICU 2.0
// */
// protected String subFormat(char ch, int count, int beginOffset,
// FieldPosition pos, DateFormatSymbols formatData,
// Calendar cal) {
// switch (ch) {
// case 'G': // 'G' - ERA
// return zeroPaddingNumber(cal.get(Calendar.ERA), 1, 9);
// case 'l': // 'l' - IS_LEAP_MONTH
// {
// ChineseDateFormatSymbols symbols =
// (ChineseDateFormatSymbols) formatData;
// return symbols.getLeapMonth(cal.get(
// ChineseCalendar.IS_LEAP_MONTH));
// }
// default:
// return super.subFormat(ch, count, beginOffset, pos, formatData, cal);
// }
// }
/**
* {@inheritDoc}
* @internal
* @deprecated This API is ICU internal only.
*/
@Override
@Deprecated
protected void subFormat(StringBuffer buf,
char ch, int count, int beginOffset,
int fieldNum, DisplayContext capitalizationContext,
FieldPosition pos,
Calendar cal) {
// Logic to handle 'G' for chinese calendar is moved into SimpleDateFormat,
// and obsolete pattern char 'l' is now ignored in SimpleDateFormat, so we
// just use its implementation
super.subFormat(buf, ch, count, beginOffset, fieldNum, capitalizationContext, pos, cal);
// The following is no longer an issue for this subclass...
// TODO: add code to set FieldPosition for 'G' and 'l' fields. This
// is a DESIGN FLAW -- subclasses shouldn't have to duplicate the
// code that handles this at the end of SimpleDateFormat.subFormat.
// The logic should be moved up into SimpleDateFormat.format.
}
/**
* {@inheritDoc}
*
* @deprecated ICU 50
*/
@Deprecated
@Override
protected int subParse(String text, int start, char ch, int count, boolean obeyCount, boolean allowNegative,
boolean[] ambiguousYear, Calendar cal) {
// Logic to handle numeric 'G' eras for chinese calendar, and to skip special 2-digit year
// handling for chinese calendar, is moved into SimpleDateFormat, so delete here.
// Obsolete pattern char 'l' is now ignored for parsing in SimpleDateFormat, no handling
// needed here.
// So just use SimpleDateFormat implementation for this.
// just use its implementation
return super.subParse(text, start, ch, count, obeyCount, allowNegative, ambiguousYear, cal);
}
/**
* {@inheritDoc}
*
* @deprecated ICU 50
*/
@Override
@Deprecated
protected DateFormat.Field patternCharToDateFormatField(char ch) {
// no longer any field corresponding to pattern char 'l'
return super.patternCharToDateFormatField(ch);
}
/**
* The instances of this inner class are used as attribute keys and values
* in AttributedCharacterIterator that
* ChineseDateFormat.formatToCharacterIterator() method returns.
*
* There is no public constructor to this class, the only instances are the
* constants defined here.
*
* @deprecated ICU 50
*/
@Deprecated
public static class Field extends DateFormat.Field {
private static final long serialVersionUID = -5102130532751400330L;
/**
* Constant identifying the leap month marker.
* @deprecated ICU 50 This field is only used by the deprecated ChineseDateFormat class.
*/
@Deprecated
public static final Field IS_LEAP_MONTH = new Field("is leap month", ChineseCalendar.IS_LEAP_MONTH);
/**
* Constructs a ChineseDateFormat.Field with the given name and
* the ChineseCalendar field which this attribute represents.
* Use -1 for calendarField if this field does not have a
* corresponding ChineseCalendar field.
*
* @param name Name of the attribute
* @param calendarField Calendar field constant
*
* @deprecated ICU 50
*/
@Deprecated
protected Field(String name, int calendarField) {
super(name, calendarField);
}
/**
* Returns the Field constant that corresponds to the
* ChineseCalendar field calendarField. If there is no
* corresponding Field is available, null is returned.
*
* @param calendarField ChineseCalendar field constant
* @return Field associated with the calendarField,
* or null if no associated Field is available.
* @throws IllegalArgumentException if calendarField is not
* a valid Calendar field constant.
*
* @deprecated ICU 50
*/
@Deprecated
public static DateFormat.Field ofCalendarField(int calendarField) {
// Should we remove the following, since there is no longer a specific
// date format field for leap month (since 'l' pattern char is obsolete)?
if (calendarField == ChineseCalendar.IS_LEAP_MONTH) {
return IS_LEAP_MONTH;
}
return DateFormat.Field.ofCalendarField(calendarField);
}
/**
* {@inheritDoc}
*
* @deprecated ICU 50
*/
@Override
@Deprecated
///CLOVER:OFF
protected Object readResolve() throws InvalidObjectException {
if (this.getClass() != ChineseDateFormat.Field.class) {
throw new InvalidObjectException("A subclass of ChineseDateFormat.Field must implement readResolve.");
}
if (this.getName().equals(IS_LEAP_MONTH.getName())) {
return IS_LEAP_MONTH;
} else {
throw new InvalidObjectException("Unknown attribute name.");
}
}
///CLOVER:ON
}
}