1 /*
2 * Copyright (c) 2022, 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.lang.reflect.Modifier;
25 import java.lang.annotation.*;
26
27 /*
28 * @test
29 * @bug 8296743
30 * @summary Verify array classes and primitives have expected modifiers
31 */
32 @ExpectedModifiers(Modifier.PUBLIC | Modifier.FINAL | Modifier.ABSTRACT)
33 public class TestPrimitiveAndArrayModifiers {
34
35 /*
36 * Relevant excerpt of the Class.getModifiers() specification:
37 * <p> If the underlying class is an array class:
38 * <ul>
39 * <li> its {@code public}, {@code private} and {@code protected}
40 * modifiers are the same as those of its component type
41 * <li> its {@code final} and {@code abstract} modifiers are always
42 * {@code true}
43 * <li> its interface modifier is always {@code false}, even when
44 * the component type is an interface
45 * </ul>
46 */
47
48 public static void main(String... args) throws Exception {
49 testPrimitives();
50 testArrays();
51 }
52
53 private static void testArrays() {
54 Class<?>[] testCases = {
55 TestPrimitiveAndArrayModifiers.class,
56
57 PackagePrivateClass.class,
58 ProtectedClass.class,
59 PrivateClass.class,
60
61 PublicInterface.class,
62 PackagePrivateInterface.class,
63 ProtectedInterface.class,
64 PrivateInterface.class,
65 };
66
67 for(var testCase : testCases) {
68 int expectedModifiers =
69 testCase.getAnnotation(ExpectedModifiers.class).value();
70 Class<?> arrayClass = testCase.arrayType();
71 int actualModifiers = arrayClass.getModifiers();
72 if (expectedModifiers != actualModifiers) {
73 throw new RuntimeException("Expected " + Modifier.toString(expectedModifiers) +
74 "on " + testCase.getCanonicalName() +
75 ", but got " + Modifier.toString(actualModifiers));
76 }
77 }
78 }
79
80 @ExpectedModifiers(Modifier.FINAL | Modifier.ABSTRACT)
81 class PackagePrivateClass {}
82
83 @ExpectedModifiers(Modifier.FINAL | Modifier.ABSTRACT | Modifier.PROTECTED)
84 protected class ProtectedClass {}
85
86 @ExpectedModifiers(Modifier.FINAL | Modifier.ABSTRACT | Modifier.PRIVATE)
87 private class PrivateClass {}
88
89 @ExpectedModifiers(Modifier.FINAL | Modifier.ABSTRACT | Modifier.PUBLIC)
90 public interface PublicInterface {}
91
92 @ExpectedModifiers(Modifier.FINAL | Modifier.ABSTRACT)
93 interface PackagePrivateInterface {}
94
95 @ExpectedModifiers(Modifier.FINAL | Modifier.ABSTRACT | Modifier.PROTECTED)
96 protected interface ProtectedInterface {}
97
98 @ExpectedModifiers(Modifier.FINAL | Modifier.ABSTRACT | Modifier.PRIVATE)
99 private interface PrivateInterface {}
100
101 /*
102 * Relevant excerpt of the Class.getModifiers() specification:
103 *
104 * If this {@code Class} object represents a primitive type or
105 * void, its {@code public}, {@code abstract}, and {@code final}
106 * modifiers are always {@code true}.
107 */
108 private static void testPrimitives() {
109 Class<?>[] testCases = {
110 void.class,
111 boolean.class,
112 byte.class,
113 short.class,
114 char.class,
115 int.class,
116 float.class,
117 long.class,
118 double.class,
119 };
120
121 for(var testCase : testCases) {
122 int actualModifiers = testCase.getModifiers();
123 if ((Modifier.PUBLIC | Modifier.ABSTRACT | Modifier.FINAL) !=
124 actualModifiers) {
125 throw new RuntimeException("Bad modifiers " +
126 Modifier.toString(actualModifiers) +
127 " on primitive type " + testCase);
128 }
129 }
130 }
131 }
132
133 @Retention(RetentionPolicy.RUNTIME)
134 @interface ExpectedModifiers {
135 int value() default 0;
136 }