1 /*
   2  * Copyright (c) 2012, 2015, 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 
  26 package sun.util.cldr;
  27 
  28 import java.io.File;
  29 import java.security.AccessController;
  30 import java.security.PrivilegedAction;
  31 import java.text.spi.BreakIteratorProvider;
  32 import java.text.spi.CollatorProvider;
  33 import java.util.Collections;
  34 import java.util.HashSet;
  35 import java.util.Locale;
  36 import java.util.ResourceBundle;
  37 import java.util.Set;
  38 import java.util.StringTokenizer;
  39 import java.util.spi.TimeZoneNameProvider;
  40 import sun.util.locale.provider.JRELocaleProviderAdapter;
  41 import sun.util.locale.provider.LocaleProviderAdapter;
  42 
  43 /**
  44  * LocaleProviderAdapter implementation for the CLDR locale data.
  45  *
  46  * @author Masayoshi Okutsu
  47  * @author Naoto Sato
  48  */
  49 public class CLDRLocaleProviderAdapter extends JRELocaleProviderAdapter {
  50     private static final String LOCALE_DATA_JAR_NAME = "cldrdata.jar";
  51 
  52     public CLDRLocaleProviderAdapter() {
  53         final String sep = File.separator;
  54         String localeDataJar = java.security.AccessController.doPrivileged(
  55                     new sun.security.action.GetPropertyAction("java.home"))
  56                 + sep + "lib" + sep + "ext" + sep + LOCALE_DATA_JAR_NAME;
  57 
  58         // Peek at the installed extension directory to see if the jar file for
  59         // CLDR resources is installed or not.
  60         final File f = new File(localeDataJar);
  61         boolean result = AccessController.doPrivileged(
  62                 new PrivilegedAction<Boolean>() {
  63                     @Override
  64                     public Boolean run() {
  65                         return f.exists();
  66                     }
  67                 });
  68         if (!result) {
  69             throw new UnsupportedOperationException();
  70         }
  71     }
  72 
  73     /**
  74      * Returns the type of this LocaleProviderAdapter
  75      * @return the type of this
  76      */
  77     @Override
  78     public LocaleProviderAdapter.Type getAdapterType() {
  79         return LocaleProviderAdapter.Type.CLDR;
  80     }
  81 
  82     @Override
  83     public BreakIteratorProvider getBreakIteratorProvider() {
  84         return null;
  85     }
  86 
  87     @Override
  88     public CollatorProvider getCollatorProvider() {
  89         return null;
  90     }
  91 
  92     @Override
  93     public Locale[] getAvailableLocales() {
  94         Set<String> all = createLanguageTagSet("All");
  95         Locale[] locs = new Locale[all.size()];
  96         int index = 0;
  97         for (String tag : all) {
  98             locs[index++] = Locale.forLanguageTag(tag);
  99         }
 100         return locs;
 101     }
 102 
 103     @Override
 104     protected Set<String> createLanguageTagSet(String category) {
 105         ResourceBundle rb = ResourceBundle.getBundle("sun.util.cldr.CLDRLocaleDataMetaInfo", Locale.ROOT);
 106         String supportedLocaleString = rb.getString(category);
 107         if (supportedLocaleString == null) {
 108             return Collections.emptySet();
 109         }
 110         Set<String> tagset = new HashSet<>();
 111         StringTokenizer tokens = new StringTokenizer(supportedLocaleString);
 112         while (tokens.hasMoreTokens()) {
 113             tagset.add(tokens.nextToken());
 114         }
 115         return tagset;
 116     }
 117 }