Mercurial > jdk8-mips64-public > langtools / file comparison
comparison: test/tools/javac/enum/EnumImplicitPrivateConstructor.java
test/tools/javac/enum/EnumImplicitPrivateConstructor.java
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| 1 /* | |
| 2 * Copyright 2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 */ | |
| 23 | |
| 24 /* | |
| 25 * @test | |
| 26 * @bug 5009601 5010455 5005748 | |
| 27 * @summary enum constructors can be declared private | |
| 28 * @author Joseph D. Darcy | |
| 29 * | |
| 30 * @compile -source 1.5 EnumImplicitPrivateConstructor.java | |
| 31 * @run main EnumImplicitPrivateConstructor | |
| 32 */ | |
| 33 | |
| 34 import java.util.*; | |
| 35 import java.lang.reflect.*; | |
| 36 import java.lang.annotation.*; | |
| 37 | |
| 38 /* | |
| 39 * Arguably, only the final and abstract should be held in | |
| 40 * ExpectedModifiers; whether or not an enum should be static could be | |
| 41 * inferred from getDeclaringClass and working versions of | |
| 42 * getEnclosingMethod and getEnclosingConstructor. I.e. if | |
| 43 * getDeclaringClass, getEnclosingMethod, and getEnclosingConstructor | |
| 44 * were all null, the enum is a top-level class and should not be | |
| 45 * static; otherwise, it should be static. | |
| 46 */ | |
| 47 | |
| 48 @ExpectedModifiers(Modifier.FINAL) | |
| 49 public enum EnumImplicitPrivateConstructor { | |
| 50 RED(255, 0, 0), | |
| 51 GREEN(0, 255, 0), | |
| 52 BLUE(0, 0, 255); | |
| 53 | |
| 54 private int r, g, b; | |
| 55 EnumImplicitPrivateConstructor(int r, int g, int b) { | |
| 56 this.r = r; | |
| 57 this.g = g; | |
| 58 this.b = b; | |
| 59 } | |
| 60 | |
| 61 /* | |
| 62 * Using reflection, Verify that | |
| 63 * 1. all non-synthetic constructors of enum classes are marked as private. | |
| 64 * 2. top-level enum classes are marked as static | |
| 65 * 3. enum's are marked final and abstract as appropriate | |
| 66 * 4. enum constructors *cannot* be invoked reflectively | |
| 67 */ | |
| 68 public static void main(String argv[]) throws Exception { | |
| 69 boolean passed = true; | |
| 70 | |
| 71 Collection<Class> classes = new LinkedHashSet<Class>(); | |
| 72 | |
| 73 classes.add(Class.forName("EnumImplicitPrivateConstructor")); | |
| 74 classes.add(Class.forName("EnumImplicitPrivateConstructor$AnotherEnum")); | |
| 75 classes.add(Class.forName("EnumImplicitPrivateConstructor$YetAnotherEnum")); | |
| 76 classes.add(Class.forName("EnumImplicitPrivateConstructor$OneMoreEnum")); | |
| 77 | |
| 78 // Add classes of specialized enum constants | |
| 79 for(Enum e: YetAnotherEnum.values()) | |
| 80 classes.add(e.getClass()); | |
| 81 | |
| 82 for(Class clazz: classes) { | |
| 83 System.out.println("Testing class " + clazz); | |
| 84 | |
| 85 int classModifiers = clazz.getModifiers(); | |
| 86 | |
| 87 // Why is this cast needed? | |
| 88 ExpectedModifiers em = (ExpectedModifiers)clazz.getAnnotation(ExpectedModifiers.class); | |
| 89 if (em != null) { | |
| 90 System.out.println("\tTesting expected modifiers"); | |
| 91 int expected = em.value(); | |
| 92 | |
| 93 if (expected != (classModifiers & (Modifier.ABSTRACT|Modifier.FINAL|Modifier.STATIC))) { | |
| 94 passed = false; | |
| 95 System.out.println("\tFAILED: Expected 0x" + Integer.toHexString(expected) + | |
| 96 " got 0x" +Integer.toHexString(classModifiers)); | |
| 97 } | |
| 98 } | |
| 99 | |
| 100 for(Constructor ctor: clazz.getDeclaredConstructors() ) { | |
| 101 System.out.println("\tTesting constructor " + ctor); | |
| 102 | |
| 103 // We don't need no stinkin' access rules | |
| 104 try { | |
| 105 ctor.setAccessible(true); | |
| 106 } catch (java.security.AccessControlException ex) { | |
| 107 } | |
| 108 | |
| 109 int modifiers = ctor.getModifiers(); | |
| 110 | |
| 111 /* | |
| 112 * If clazz is for a specialized enum constant, the | |
| 113 * class will have the ENUM bit set but clazz.isEnum() | |
| 114 * will be false. A constructor in such a class must | |
| 115 * be non-private to allow the parent class to call | |
| 116 * the constructor. Therefore, only impose the | |
| 117 * private constructor check for genuine isEnum | |
| 118 * classes. | |
| 119 */ | |
| 120 if (clazz.isEnum()) { | |
| 121 if ((modifiers & Modifier.PRIVATE) == 0 && | |
| 122 ! ctor.isSynthetic() ) { | |
| 123 passed = false; | |
| 124 System.out.println("\tFAILED: Constructor not marked private: modifiers 0x" + | |
| 125 Integer.toHexString(modifiers)); | |
| 126 } | |
| 127 } | |
| 128 | |
| 129 try { | |
| 130 // Should get exception trying to invoke | |
| 131 Object o = null; | |
| 132 try { | |
| 133 o = ctor.newInstance("abc", 123); | |
| 134 } catch (IllegalAccessException ex) { | |
| 135 } | |
| 136 | |
| 137 /* | |
| 138 * A better test would query the number (and type) | |
| 139 * of parameters and create an appropriate | |
| 140 * argument list since IllegalArgumentException can be | |
| 141 * thrown for just using the wrong number of arguments. | |
| 142 */ | |
| 143 | |
| 144 if (o != null) { | |
| 145 passed = false; | |
| 146 System.err.println("Error: Created new enum object!"); | |
| 147 System.err.println(o.getClass()); | |
| 148 System.err.println(o.toString()); | |
| 149 } | |
| 150 } catch (IllegalArgumentException iae) {} | |
| 151 | |
| 152 } | |
| 153 } | |
| 154 | |
| 155 if (!passed) | |
| 156 throw new RuntimeException("Error during testing."); | |
| 157 } | |
| 158 | |
| 159 | |
| 160 /* | |
| 161 * Should be final and not abstract. | |
| 162 */ | |
| 163 @ExpectedModifiers(Modifier.FINAL|Modifier.STATIC) | |
| 164 enum AnotherEnum { | |
| 165 YELLOW, | |
| 166 CYAN, | |
| 167 MAGENTA; | |
| 168 } | |
| 169 | |
| 170 /* | |
| 171 * Should be neither final nor abstract. | |
| 172 */ | |
| 173 @ExpectedModifiers(Modifier.STATIC) | |
| 174 enum YetAnotherEnum { | |
| 175 GREEN { | |
| 176 int value(){ return 1;} | |
| 177 }, | |
| 178 | |
| 179 ORANGE { | |
| 180 int value(){ return 2;} | |
| 181 }, | |
| 182 | |
| 183 VIOLET { | |
| 184 int value(){ return 3;} | |
| 185 }; | |
| 186 | |
| 187 int value(){ return 0;} | |
| 188 } | |
| 189 | |
| 190 /* | |
| 191 * Should be abstract and not final. | |
| 192 */ | |
| 193 @ExpectedModifiers(Modifier.ABSTRACT|Modifier.STATIC) | |
| 194 enum OneMoreEnum { | |
| 195 SANGUINE { | |
| 196 int value(){ return 1;} | |
| 197 }, | |
| 198 | |
| 199 VERDANT { | |
| 200 int value(){ return 2;} | |
| 201 }, | |
| 202 | |
| 203 CERULEAN { | |
| 204 int value(){ return 3;} | |
| 205 }; | |
| 206 | |
| 207 abstract int value(); | |
| 208 } | |
| 209 } | |
| 210 | |
| 211 @Retention(RetentionPolicy.RUNTIME) | |
| 212 @interface ExpectedModifiers { | |
| 213 int value(); | |
| 214 } |
