1 /*
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  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 }
--- EOF ---