1 /*
   2  * Copyright (c) 2010, 2017, 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 import java.io.InputStreamReader;
  25 import java.io.PrintStream;
  26 import java.nio.charset.Charset;
  27 import java.nio.charset.UnsupportedCharsetException;
  28 import java.util.Iterator;
  29 import java.util.SortedMap;
  30 
  31 public class CharsetTest {
  32 
  33     private static PrintStream out = System.err;
  34     private static final SortedMap available = Charset.availableCharsets();
  35 
  36     private static void fail(String csn, String msg) {
  37         throw new RuntimeException(csn + ": " + msg);
  38     }
  39 
  40     private static void testPositive(String csn) {
  41         if (!Charset.isSupported(csn))
  42             fail(csn, "Not supported");
  43 
  44         Charset cs = Charset.forName(csn);
  45         out.println(csn + " --> " + cs.getClass().getName());
  46         out.println("  " + cs.name() + " " + cs.aliases());
  47 
  48         if (!available.containsKey(cs.name()))
  49             fail(csn, "Not in available charsets: " + available.keySet());
  50         if (!((Charset)available.get(cs.name())).equals(cs))
  51             fail(csn, "Available charset != looked-up charset");
  52 
  53         if (csn.equalsIgnoreCase("FOO")) {
  54             if (!(cs instanceof FooCharset))
  55                 fail(csn, "instanceof failed");
  56         }
  57     }
  58 
  59     private static void testNegative(String csn) {
  60         if (Charset.isSupported(csn))
  61             fail(csn, "Supported");
  62         if (available.containsKey(csn))
  63             fail(csn, "Available");
  64         try {
  65             Charset.forName(csn);
  66         } catch (UnsupportedCharsetException x) {
  67             out.println(csn + " not supported, as expected");
  68             return;
  69         }
  70         fail(csn, "Lookup succeeded");
  71     }
  72 
  73     public static void main(String [] args) {
  74 
  75         out.println("Default: "
  76                     + new InputStreamReader(System.in).getEncoding());
  77 
  78         out.print("Available:");
  79         for (Iterator i = available.keySet().iterator(); i.hasNext();)
  80             out.print(" " + (String)i.next());
  81         out.println();
  82 
  83         for (int i = 0; i < args.length; i++) {
  84             String a = args[i];
  85             boolean not = a.startsWith("!");
  86             String csn = (not ? a.substring(1) : a);
  87             if (not)
  88                 testNegative(csn);
  89             else
  90                 testPositive(csn);
  91         }
  92     }
  93 
  94 }