1 /*
   2  * Copyright (c) 2012, 2014, 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package sun.util.locale.provider;
  26 
  27 import java.util.Locale;
  28 import java.util.Set;
  29 import java.util.spi.CalendarDataProvider;
  30 
  31 /**
  32  * Concrete implementation of the  {@link java.util.spi.CalendarDataProvider
  33  * CalendarDataProvider} class for the JRE LocaleProviderAdapter.
  34  *
  35  * @author Masayoshi Okutsu
  36  * @author Naoto Sato
  37  */
  38 public class CalendarDataProviderImpl extends CalendarDataProvider implements AvailableLanguageTags {
  39     private final LocaleProviderAdapter.Type type;
  40     private Set<String> langtags;
  41 
  42     public CalendarDataProviderImpl(LocaleProviderAdapter.Type type) {
  43         this.type = type;
  44     }
  45 
  46     @Override
  47     public int getFirstDayOfWeek(Locale locale) {
  48         return LocaleProviderAdapter.forType(type).getLocaleResources(locale)
  49                    .getCalendarData(CalendarDataUtility.FIRST_DAY_OF_WEEK);
  50     }
  51 
  52     @Override
  53     public int getMinimalDaysInFirstWeek(Locale locale) {
  54         return LocaleProviderAdapter.forType(type).getLocaleResources(locale)
  55                    .getCalendarData(CalendarDataUtility.MINIMAL_DAYS_IN_FIRST_WEEK);
  56     }
  57 
  58     @Override
  59     public Locale[] getAvailableLocales() {
  60         return LocaleProviderAdapter.toLocaleArray(getLangTags());
  61     }
  62 
  63     @Override
  64     public Set<String> getAvailableLanguageTags() {
  65         return getLangTags();
  66     }
  67 
  68     private Set<String> getLangTags() {
  69         if (langtags == null) {
  70             langtags = ((JRELocaleProviderAdapter)LocaleProviderAdapter.forType(type)).getLanguageTagSet("CalendarData");
  71         }
  72         return langtags;
  73     }
  74 }