1 /*

     2  * Copyright (c) 2011, 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 /*

    25  * @test

    26  * @bug 4884238

    27  * @summary Test standard charset name constants.

    28  * @author Mike Duigou

    29  * @run main Standard

    30  */

    31 

    32 import java.lang.reflect.Field;

    33 import java.lang.reflect.Modifier;

    34 import java.io.*;

    35 import java.nio.charset.*;

    36 import java.util.Arrays;

    37 import java.util.HashSet;

    38 import java.util.Set;

    39 

    40 public class Standard {

    41 

    42     private final static String standardCharsets[] = {

    43         "US-ASCII", "ISO-8859-1", "UTF-8",

    44         "UTF-16BE", "UTF-16LE", "UTF-16" };

    45 

    46     public static void realMain(String[] args) {

    47         check(StandardCharset.US_ASCII instanceof Charset);

    48         check(StandardCharset.ISO_8859_1 instanceof Charset);

    49         check(StandardCharset.UTF_8 instanceof Charset);

    50         check(StandardCharset.UTF_16BE instanceof Charset);

    51         check(StandardCharset.UTF_16LE instanceof Charset);

    52         check(StandardCharset.UTF_16 instanceof Charset);

    53 

    54         check("US-ASCII".equals(StandardCharset.US_ASCII.name()));

    55         check("ISO-8859-1".equals(StandardCharset.ISO_8859_1.name()));

    56         check("UTF-8".equals(StandardCharset.UTF_8.name()));

    57         check("UTF-16BE".equals(StandardCharset.UTF_16BE.name()));

    58         check("UTF-16LE".equals(StandardCharset.UTF_16LE.name()));

    59         check("UTF-16".equals(StandardCharset.UTF_16.name()));

    60 

    61         Set<String> charsets = new HashSet<>();

    62         Field standardCharsetFields[] = StandardCharset.class.getFields();

    63 

    64         for(Field charsetField : standardCharsetFields) {

    65             check(StandardCharset.class == charsetField.getDeclaringClass());

    66             check(Modifier.isFinal(charsetField.getModifiers()));

    67             check(Modifier.isStatic(charsetField.getModifiers()));

    68             check(Modifier.isPublic(charsetField.getModifiers()));

    69             Object value;

    70             try {

    71                 value = charsetField.get(null);

    72             } catch(IllegalAccessException failure) {

    73                 unexpected(failure);

    74                 continue;

    75             }

    76             check(value instanceof Charset);

    77             charsets.add(((Charset)value).name());

    78         }

    79 

    80         check(charsets.containsAll(Arrays.asList(standardCharsets)));

    81         charsets.removeAll(Arrays.asList(standardCharsets));

    82         check(charsets.isEmpty());

    83     }

    84 

    85     //--------------------- Infrastructure ---------------------------

    86     static volatile int passed = 0, failed = 0;

    87     static void pass() { passed++; }

    88     static void fail() { failed++; Thread.dumpStack(); }

    89     static void fail(String msg) { System.out.println(msg); fail(); }

    90     static void unexpected(Throwable t) { failed++; t.printStackTrace(); }

    91     static void check(boolean cond) { if (cond) pass(); else fail(); }

    92     static void equal(Object x, Object y) {

    93         if (x == null ? y == null : x.equals(y)) pass();

    94         else {System.out.println(x + " not equal to " + y); fail();}}

    95     static void equal2(Object x, Object y) {equal(x, y); equal(y, x);}

    96     public static void main(String[] args) throws Throwable {

    97         try { realMain(args); } catch (Throwable t) { unexpected(t); }

    98 

    99         System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);

   100         if (failed > 0) throw new Exception("Some tests failed");

   101     }

   102     private static abstract class Fun {abstract void f() throws Throwable;}

   103     private static void THROWS(Class<? extends Throwable> k, Fun... fs) {

   104           for (Fun f : fs)

   105               try { f.f(); fail("Expected " + k.getName() + " not thrown"); }

   106               catch (Throwable t) {

   107                   if (k.isAssignableFrom(t.getClass())) pass();

   108                   else unexpected(t);}}

   109     static byte[] serializedForm(Object obj) {

   110         try {

   111             ByteArrayOutputStream baos = new ByteArrayOutputStream();

   112             new ObjectOutputStream(baos).writeObject(obj);

   113             return baos.toByteArray();

   114         } catch (IOException e) { throw new Error(e); }}

   115     static Object readObject(byte[] bytes)

   116         throws IOException, ClassNotFoundException {

   117         InputStream is = new ByteArrayInputStream(bytes);

   118         return new ObjectInputStream(is).readObject();}

   119     @SuppressWarnings("unchecked")

   120     static <T> T serialClone(T obj) {

   121         try { return (T) readObject(serializedForm(obj)); }

   122         catch (Exception e) { throw new Error(e); }}

   123 

   124 }