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(StandardCharsets.US_ASCII instanceof Charset);
48 check(StandardCharsets.ISO_8859_1 instanceof Charset);
49 check(StandardCharsets.UTF_8 instanceof Charset);
50 check(StandardCharsets.UTF_16BE instanceof Charset);
51 check(StandardCharsets.UTF_16LE instanceof Charset);
52 check(StandardCharsets.UTF_16 instanceof Charset);
53
54 check("US-ASCII".equals(StandardCharsets.US_ASCII.name()));
55 check("ISO-8859-1".equals(StandardCharsets.ISO_8859_1.name()));
56 check("UTF-8".equals(StandardCharsets.UTF_8.name()));
57 check("UTF-16BE".equals(StandardCharsets.UTF_16BE.name()));
58 check("UTF-16LE".equals(StandardCharsets.UTF_16LE.name()));
59 check("UTF-16".equals(StandardCharsets.UTF_16.name()));
60
61 Set<String> charsets = new HashSet<>();
62 Field standardCharsetFields[] = StandardCharsets.class.getFields();
63
64 for(Field charsetField : standardCharsetFields) {
65 check(StandardCharsets.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 }