1 /*
   2  * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 package com.bar;
  25 
  26 import com.foobar.Utils;
  27 import java.util.Arrays;
  28 import static java.util.Calendar.*;
  29 import java.util.HashMap;
  30 import java.util.Locale;
  31 import java.util.Map;
  32 import java.util.spi.CalendarNameProvider;
  33 
  34 public class CalendarNameProviderImpl extends CalendarNameProvider {
  35     static final char FULLWIDTH_ZERO = '\uff10';
  36     static final Locale[] avail = {
  37         new Locale("ja", "JP", "kids"),
  38     };
  39 
  40     @Override
  41     public String getDisplayName(String calendarType, int field, int value, int style, Locale locale) {
  42         if (calendarType == null || locale == null) {
  43             throw new NullPointerException();
  44         }
  45         if (!Utils.supportsLocale(Arrays.asList(avail), locale)) {
  46             throw new IllegalArgumentException("locale is not one of available locales: "+ locale);
  47         }
  48         if (field != MONTH) {
  49             return null;
  50         }
  51         return toMonthName(value + 1, style);
  52     }
  53 
  54     @Override
  55     public Map<String, Integer> getDisplayNames(String calendarType, int field, int style, Locale locale) {
  56         if (calendarType == null || locale == null) {
  57             throw new NullPointerException();
  58         }
  59         if (!Utils.supportsLocale(Arrays.asList(avail), locale)) {
  60             throw new IllegalArgumentException("locale is not one of available locales: " + locale);
  61         }
  62         if (field != MONTH) {
  63             return null;
  64         }
  65         Map<String, Integer> map = new HashMap<>();
  66         if (style == LONG_STANDALONE) {
  67             style = LONG;
  68         } else if (style == SHORT_STANDALONE) {
  69             style = SHORT;
  70         }
  71         for (int month = JANUARY; month <= DECEMBER; month++) {
  72             if (style == ALL_STYLES || style == LONG) {
  73                 map.put(toMonthName(month + 1, LONG), month);
  74             }
  75             if (style == ALL_STYLES || style == SHORT) {
  76                 map.put(toMonthName(month + 1, SHORT), month);
  77             }
  78         }
  79         return map;
  80     }
  81 
  82     @Override
  83     public Locale[] getAvailableLocales() {
  84         return avail.clone();
  85     }
  86 
  87     // month is 1-based.
  88     public static String toMonthName(int month, int style) {
  89         StringBuilder sb = new StringBuilder();
  90         if (month >= 10) {
  91             sb.append((char)(FULLWIDTH_ZERO + 1));
  92             sb.appendCodePoint((char)(FULLWIDTH_ZERO + (month % 10)));
  93         } else {
  94             sb.appendCodePoint((char)(FULLWIDTH_ZERO + month));
  95         }
  96         if (style == SHORT || style == SHORT_STANDALONE) {
  97             return sb.toString(); // full-width digit(s)
  98         }
  99         sb.append("\u304c\u3064"); // + "gatsu" in Hiragana
 100         return sb.toString();
 101     }
 102 }