1 /*
   2  * Copyright (c) 2003, 2015, 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 4728816
  27  *  @summary JPDA: Add support for enums
  28  *
  29  *  @author jjh
  30  *
  31  *  @modules jdk.jdi
  32  *  @run build TestScaffold VMConnection TargetListener TargetAdapter
  33  *  @run compile -g EnumTest.java
  34  *  @run driver EnumTest
  35  */
  36 import com.sun.jdi.*;
  37 import com.sun.jdi.event.*;
  38 import com.sun.jdi.request.*;
  39 
  40 import java.util.*;
  41 
  42     /********** target program **********/
  43 
  44 
  45 enum Coin {
  46     penny(1), nickel(5), dime(10), quarter(25);
  47 
  48     Coin(int value) { this.value = value; }
  49 
  50     private final int value;
  51 
  52     public int value() { return value; }
  53 }
  54 
  55 class EnumTarg {
  56     static Coin myCoin = Coin.penny;
  57     public static void main(String[] args){
  58         System.out.println("Howdy!");
  59         System.out.println("Goodbye from EnumTarg!");
  60     }
  61 }
  62 
  63     /********** test program **********/
  64 
  65 public class EnumTest extends TestScaffold {
  66     ReferenceType targetClass;
  67 
  68     EnumTest (String args[]) {
  69         super(args);
  70     }
  71 
  72     public static void main(String[] args)      throws Exception {
  73         new EnumTest(args).startTests();
  74     }
  75 
  76     void fail(String reason) throws Exception {
  77         failure(reason);
  78     }
  79 
  80     /********** test core **********/
  81 
  82 
  83     protected void runTests() throws Exception {
  84         /*
  85          * Get to the top of main()
  86          * to determine targetClass
  87          */
  88         BreakpointEvent bpe = startToMain("EnumTarg");
  89         targetClass = bpe.location().declaringType();
  90 
  91         ReferenceType rt = findReferenceType("EnumTarg");
  92         Field myField = rt.fieldByName("myCoin");
  93         ObjectReference enumObject = (ObjectReference)rt.getValue(myField);
  94         ClassType enumClass =(ClassType) enumObject.referenceType();
  95         ClassType superClass = enumClass.superclass();
  96         if (!superClass.name().equals("java.lang.Enum")) {
  97             fail("failure: Superclass of enum class is not java.lang.Enum: " + superClass.name());
  98         }
  99         if (!enumClass.isEnum()) {
 100             fail("failure: isEnum() is false but should be true");
 101         }
 102         if (((ClassType)rt).isEnum()) {
 103             fail("failure: isEnum() is true for EnumTarg but should be false");
 104         }
 105         Field enumConstant = enumClass.fieldByName("penny");
 106         if (!enumConstant.isEnumConstant()) {
 107             fail("failure: The 'penny' field is not marked " +
 108                  "as an enum constant.");
 109         }
 110 
 111         /*
 112          * This isn't really part of the test, it just
 113          * shows how to look at all the enum constants,
 114          * but not necessarily in the correct order
 115          */
 116         List allFields = enumClass.fields();
 117         List enumConstantFields = new ArrayList();
 118         StringBuffer enumDecl = new StringBuffer("enum " + enumClass.name() + " {");
 119         char delim = ' ';
 120 
 121         for (Iterator iter = allFields.iterator(); iter.hasNext(); ) {
 122             Field aField = (Field)iter.next();
 123             if (aField.isEnumConstant()) {
 124                 enumDecl.append(' ');
 125                 enumDecl.append(aField.name());
 126                 enumDecl.append(delim);
 127                 delim = ',';
 128             }
 129         }
 130         enumDecl.append("; };");
 131         System.out.println("Enum decl is: " + enumDecl);
 132 
 133         listenUntilVMDisconnect();
 134 
 135         /*
 136          * deal with results of test
 137          * if anything has called failure("foo") testFailed will be true
 138          */
 139         if (!testFailed) {
 140             println("EnumTest: passed");
 141         } else {
 142             throw new Exception("EnumTest: failed");
 143         }
 144     }
 145 }