001 /* TimeZoneNameProvider.java -- Providers of localized currency symbols 002 Copyright (C) 2007 Free Software Foundation, Inc. 003 004 This file is part of GNU Classpath. 005 006 GNU Classpath is free software; you can redistribute it and/or modify 007 it under the terms of the GNU General Public License as published by 008 the Free Software Foundation; either version 2, or (at your option) 009 any later version. 010 011 GNU Classpath is distributed in the hope that it will be useful, but 012 WITHOUT ANY WARRANTY; without even the implied warranty of 013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 General Public License for more details. 015 016 You should have received a copy of the GNU General Public License 017 along with GNU Classpath; see the file COPYING. If not, write to the 018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 019 02110-1301 USA. 020 021 Linking this library statically or dynamically with other modules is 022 making a combined work based on this library. Thus, the terms and 023 conditions of the GNU General Public License cover the whole 024 combination. 025 026 As a special exception, the copyright holders of this library give you 027 permission to link this library with independent modules to produce an 028 executable, regardless of the license terms of these independent 029 modules, and to copy and distribute the resulting executable under 030 terms of your choice, provided that you also meet, for each linked 031 independent module, the terms and conditions of the license of that 032 module. An independent module is a module which is not derived from 033 or based on this library. If you modify this library, you may extend 034 this exception to your version of the library, but you are not 035 obligated to do so. If you do not wish to do so, delete this 036 exception statement from your version. */ 037 038 package java.util.spi; 039 040 import java.util.Locale; 041 042 /** 043 * A {@link TimeZoneNameProvider} provides localized 044 * versions of the names that represent a particular 045 * timezone. A <code>null</code> value may 046 * be returned, which should be treated as a lack of 047 * support for the specified {@link Locale}. The names 048 * from this class are also used by 049 * {@link DateFormatSymbols#getZoneStrings()}. 050 * 051 * @author Andrew John Hughes (gnu_andrew@member.fsf.org) 052 * @since 1.6 053 */ 054 public abstract class TimeZoneNameProvider 055 extends LocaleServiceProvider 056 { 057 058 /** 059 * Constructs a new {@link TimeZoneNameProvider}. 060 * Provided for implicit invocation by subclasses. 061 */ 062 protected TimeZoneNameProvider() 063 { 064 } 065 066 /** 067 * Returns a name for the specified time zone identifier 068 * localized to the supplied {@link java.util.Locale}. 069 * The time zone identifier is either <code>"GMT"</code> 070 * or one of the identifiers from the public domain "tz 071 * database" found at <a href="ftp://elsie.nci.nih.gov/pub/"> 072 * ftp://elsie.nci.nih.gov/pub</a>. Note that a translated 073 * name for the daylight savings time variant should be returned, 074 * even if the timezone has not observed daylight savings 075 * time in the past. If the name of the timezone 076 * in the given locale is not supported, <code>null</code> 077 * is returned. 078 * 079 * @param id a time zone identifier. 080 * @param daylight true if the daylight savings time variant 081 * should be returned. 082 * @param style either {@link java.util.TimeZone.LONG} or 083 * {@link java.util.TimeZone.SHORT} 084 * @param locale the locale to express the timezone in. 085 * @return the localized time zone name, or <code>null</code> 086 * if one is not available. 087 * @throws NullPointerException if the identifer or locale is null. 088 * @throws IllegalArgumentException if the style is invalid 089 * or the locale is not one 090 * returned by 091 * {@link getAvailableLocales()} 092 * @see java.util.TimeZone#getDisplayName(boolean,int,java.util.Locale) 093 */ 094 public abstract String getDisplayName(String id, boolean daylight, 095 int style, Locale locale); 096 097 }