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
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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 
fail(String csn, String msg)36     private static void fail(String csn, String msg) {
37         throw new RuntimeException(csn + ": " + msg);
38     }
39 
testPositive(String csn)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 
testNegative(String csn)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 
main(String [] args)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 }
95