1 /*
   2  * Copyright (c) 2011 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  * Portions Copyright (c) 2011 IBM Corporation
  26  */
  27 
  28 /*
  29  * @test
  30  * @bug 6312706
  31  * @summary A serialized EnumMap can be successfully de-serialized.
  32  * @author Neil Richards <neil.richards@ngmr.net>, <neil_richards@uk.ibm.com>
  33  */
  34 
  35 import java.io.ByteArrayInputStream;
  36 import java.io.ByteArrayOutputStream;
  37 import java.io.IOException;
  38 import java.io.ObjectInputStream;
  39 import java.io.ObjectOutputStream;
  40 import java.io.PrintWriter;
  41 import java.io.StringWriter;
  42 import java.util.EnumMap;
  43 
  44 public class SimpleSerialization {
  45     private enum TestEnum { e00, e01, e02, e03, e04, e05, e06, e07 }
  46     public static void main(final String[] args) throws Exception {
  47         final EnumMap<TestEnum, String> enumMap = new EnumMap<>(TestEnum.class);
  48 
  49         enumMap.put(TestEnum.e01, TestEnum.e01.name());
  50         enumMap.put(TestEnum.e04, TestEnum.e04.name());
  51         enumMap.put(TestEnum.e05, TestEnum.e05.name());
  52 
  53         final ByteArrayOutputStream baos = new ByteArrayOutputStream();
  54         final ObjectOutputStream oos = new ObjectOutputStream(baos);
  55 
  56         oos.writeObject(enumMap);
  57         oos.close();
  58 
  59         final byte[] data = baos.toByteArray();
  60         final ByteArrayInputStream bais = new ByteArrayInputStream(data);
  61         final ObjectInputStream ois = new ObjectInputStream(bais);
  62 
  63         final Object deserializedObject = ois.readObject();
  64         ois.close();
  65 
  66         if (false == enumMap.equals(deserializedObject)) {
  67             throw new RuntimeException(getFailureText(enumMap, deserializedObject));
  68         }
  69     }
  70 
  71     private static String getFailureText(final Object orig, final Object copy) {
  72         final StringWriter sw = new StringWriter();
  73         final PrintWriter pw = new PrintWriter(sw);
  74 
  75         pw.println("Test FAILED: Deserialized object is not equal to the original object");
  76         pw.print("\tOriginal: ");
  77         printObject(pw, orig).println();
  78         pw.print("\tCopy:     ");
  79         printObject(pw, copy).println();
  80 
  81         pw.close();
  82         return sw.toString();
  83     }
  84 
  85     private static PrintWriter printObject(final PrintWriter pw, final Object o) {
  86         pw.printf("%s@%08x", o.getClass().getName(), System.identityHashCode(o));
  87         return pw;
  88     }
  89 }