chromium/third_party/icu/source/i18n/unicode/dtfmtsym.h

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
********************************************************************************
*   Copyright (C) 1997-2016, International Business Machines
*   Corporation and others.  All Rights Reserved.
********************************************************************************
*
* File DTFMTSYM.H
*
* Modification History:
*
*   Date        Name        Description
*   02/19/97    aliu        Converted from java.
*    07/21/98    stephen        Added getZoneIndex()
*                            Changed to match C++ conventions
********************************************************************************
*/

#ifndef DTFMTSYM_H
#define DTFMTSYM_H

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#if !UCONFIG_NO_FORMATTING

#include "unicode/calendar.h"
#include "unicode/strenum.h"
#include "unicode/uobject.h"
#include "unicode/locid.h"
#include "unicode/udat.h"
#include "unicode/ures.h"

/**
 * \file
 * \brief C++ API: Symbols for formatting dates.
 */

U_NAMESPACE_BEGIN

/* forward declaration */
class SimpleDateFormat;
class Hashtable;

/**
 * DateFormatSymbols is a public class for encapsulating localizable date-time
 * formatting data -- including timezone data. DateFormatSymbols is used by
 * DateFormat and SimpleDateFormat.
 * <P>
 * Rather than first creating a DateFormatSymbols to get a date-time formatter
 * by using a SimpleDateFormat constructor, clients are encouraged to create a
 * date-time formatter using the getTimeInstance(), getDateInstance(), or
 * getDateTimeInstance() method in DateFormat. Each of these methods can return a
 * date/time formatter initialized with a default format pattern along with the
 * date-time formatting data for a given or default locale. After a formatter is
 * created, clients may modify the format pattern using the setPattern function
 * as so desired. For more information on using these formatter factory
 * functions, see DateFormat.
 * <P>
 * If clients decide to create a date-time formatter with a particular format
 * pattern and locale, they can do so with new SimpleDateFormat(aPattern,
 * new DateFormatSymbols(aLocale)).  This will load the appropriate date-time
 * formatting data from the locale.
 * <P>
 * DateFormatSymbols objects are clonable. When clients obtain a
 * DateFormatSymbols object, they can feel free to modify the date-time
 * formatting data as necessary. For instance, clients can
 * replace the localized date-time format pattern characters with the ones that
 * they feel easy to remember. Or they can change the representative cities
 * originally picked by default to using their favorite ones.
 * <P>
 * DateFormatSymbols are not expected to be subclassed. Data for a calendar is
 * loaded out of resource bundles.  The 'type' parameter indicates the type of
 * calendar, for example, "gregorian" or "japanese".  If the type is not gregorian
 * (or nullptr, or an empty string) then the type is appended to the resource name,
 * for example,  'Eras_japanese' instead of 'Eras'.   If the resource 'Eras_japanese' did
 * not exist (even in root), then this class will fall back to just 'Eras', that is,
 * Gregorian data.  Therefore, the calendar implementor MUST ensure that the root
 * locale at least contains any resources that are to be particularized for the
 * calendar type.
 */
class U_I18N_API DateFormatSymbols final : public UObject  { … };

U_NAMESPACE_END

#endif /* #if !UCONFIG_NO_FORMATTING */

#endif /* U_SHOW_CPLUSPLUS_API */

#endif // _DTFMTSYM
//eof