jdk8-mips64-public/langtools: test/tools/javac/enum/EnumImplicitPrivateConstructor.java@959103a6100f (annotated)

test/tools/javac/enum/EnumImplicitPrivateConstructor.java@959103a6100f (annotated)

test/tools/javac/enum/EnumImplicitPrivateConstructor.java

Wed, 27 Apr 2016 01:34:52 +0800

author: aoqi
date: Wed, 27 Apr 2016 01:34:52 +0800
changeset 0: 959103a6100f
child 2525: 2eb010b6cb22
permissions: -rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/langtools/
changeset: 2573:53ca196be1ae
tag: jdk8u25-b17

 /*
  * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 /*
  * @test
  * @bug 5009601 5010455 5005748
  * @summary enum constructors can be declared private
  * @author Joseph D. Darcy
  */
 import java.util.*;
 import java.lang.reflect.*;
 import java.lang.annotation.*;
 /*
  * Arguably, only the final and abstract should be held in
  * ExpectedModifiers; whether or not an enum should be static could be
  * inferred from getDeclaringClass and working versions of
  * getEnclosingMethod and getEnclosingConstructor.  I.e. if
  * getDeclaringClass, getEnclosingMethod, and getEnclosingConstructor
  * were all null, the enum is a top-level class and should not be
  * static; otherwise, it should be static.
  */
 @ExpectedModifiers(Modifier.FINAL)
 public enum EnumImplicitPrivateConstructor {
     RED(255, 0, 0),
     GREEN(0, 255, 0),
     BLUE(0, 0, 255);
     private int r, g, b;
     EnumImplicitPrivateConstructor(int r, int g, int b) {
         this.r = r;
         this.g = g;
         this.b = b;
     }
     /*
      * Using reflection, Verify that
      * 1. all non-synthetic constructors of enum classes are marked as private.
      * 2. top-level enum classes are marked as static
      * 3. enum's are marked final and abstract as appropriate
      * 4. enum constructors *cannot* be invoked reflectively
      */
     public static void main(String argv[]) throws Exception {
         boolean passed = true;
         Collection<Class> classes = new LinkedHashSet<Class>();
         classes.add(Class.forName("EnumImplicitPrivateConstructor"));
         classes.add(Class.forName("EnumImplicitPrivateConstructor$AnotherEnum"));
         classes.add(Class.forName("EnumImplicitPrivateConstructor$YetAnotherEnum"));
         classes.add(Class.forName("EnumImplicitPrivateConstructor$OneMoreEnum"));
         // Add classes of specialized enum constants
         for(Enum e: YetAnotherEnum.values())
             classes.add(e.getClass());
         for(Class clazz: classes) {
             System.out.println("Testing class " + clazz);
             int classModifiers = clazz.getModifiers();
             // Why is this cast needed?
             ExpectedModifiers em = (ExpectedModifiers)clazz.getAnnotation(ExpectedModifiers.class);
             if (em != null) {
                 System.out.println("\tTesting expected modifiers");
                 int expected = em.value();
                 if (expected != (classModifiers & (Modifier.ABSTRACT|Modifier.FINAL|Modifier.STATIC))) {
                     passed = false;
                     System.out.println("\tFAILED: Expected 0x" + Integer.toHexString(expected) +
                                        " got 0x" +Integer.toHexString(classModifiers));
                 }
             }
             for(Constructor ctor: clazz.getDeclaredConstructors() ) {
                 System.out.println("\tTesting constructor " + ctor);
                 // We don't need no stinkin' access rules
                 try {
                     ctor.setAccessible(true);
                 } catch (java.security.AccessControlException ex) {
                 }
                 int modifiers = ctor.getModifiers();
                 /*
                  * If clazz is for a specialized enum constant, the
                  * class will have the ENUM bit set but clazz.isEnum()
                  * will be false.  A constructor in such a class must
                  * be non-private to allow the parent class to call
                  * the constructor.  Therefore, only impose the
                  * private constructor check for genuine isEnum
                  * classes.
                  */
                 if (clazz.isEnum()) {
                     if ((modifiers & Modifier.PRIVATE) == 0 &&
                         ! ctor.isSynthetic() ) {
                         passed = false;
                         System.out.println("\tFAILED: Constructor not marked private: modifiers 0x" +
                                            Integer.toHexString(modifiers));
                     }
                 }
                 try {
                     // Should get exception trying to invoke
                     Object o = null;
                     try {
                         o = ctor.newInstance("abc", 123);
                     } catch (IllegalAccessException ex) {
                     }
                     /*
                      * A better test would query the number (and type)
                      * of parameters and create an appropriate
                      * argument list since IllegalArgumentException can be
                      * thrown for just using the wrong number of arguments.
                      */
                     if (o != null) {
                         passed = false;
                         System.err.println("Error: Created new enum object!");
                         System.err.println(o.getClass());
                         System.err.println(o.toString());
                     }
                 } catch (IllegalArgumentException iae) {}
             }
         }
         if (!passed)
             throw new RuntimeException("Error during testing.");
     }
     /*
      * Should be final and not abstract.
      */
     @ExpectedModifiers(Modifier.FINAL|Modifier.STATIC)
     enum AnotherEnum {
         YELLOW,
         CYAN,
         MAGENTA;
     }
     /*
      * Should be neither final nor abstract.
      */
     @ExpectedModifiers(Modifier.STATIC)
     enum YetAnotherEnum {
         GREEN {
             int value(){ return 1;}
         },
         ORANGE {
             int value(){ return 2;}
         },
         VIOLET {
             int value(){ return 3;}
         };
         int value(){ return 0;}
     }
     /*
      * Should be abstract and not final.
      */
     @ExpectedModifiers(Modifier.ABSTRACT|Modifier.STATIC)
     enum OneMoreEnum {
         SANGUINE {
             int value(){ return 1;}
         },
         VERDANT {
             int value(){ return 2;}
         },
         CERULEAN {
             int value(){ return 3;}
         };
         abstract int value();
     }
 }
 @Retention(RetentionPolicy.RUNTIME)
 @interface ExpectedModifiers {
     int value();
 }

Mercurial > jdk8-mips64-public > langtools / annotate

test/tools/javac/enum/EnumImplicitPrivateConstructor.java@959103a6100f (annotated)

test/tools/javac/enum/EnumImplicitPrivateConstructor.java