1 /* 2 * Copyright 2010-2011 IBM Corporation. All Rights Reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is licensed by Oracle to you under the terms of the GNU 6 * General Public License version 2 only. Oracle designates this 7 * particular file as subject to the "Classpath" exception as provided 8 * by Oracle in the LICENSE file that accompanied this code. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 */ 24 25 /* 26 * @test 27 * @bug 6927486 28 * @summary A serialized Hashtable can be de-serialized properly. 29 * @author Neil Richards <neil.richards@ngmr.net>, <neil_richards@uk.ibm.com> 30 */ 31 32 import java.io.ByteArrayInputStream; 33 import java.io.ByteArrayOutputStream; 34 import java.io.IOException; 35 import java.io.ObjectInputStream; 36 import java.io.ObjectOutputStream; 37 import java.io.PrintWriter; 38 import java.io.StringWriter; 39 import java.util.Hashtable; 40 41 public class SimpleSerialization { 42 public static void main(final String[] args) throws Exception { 43 Hashtable<String, String> h1 = new Hashtable<>(); 44 45 h1.put("key", "value"); 46 47 final ByteArrayOutputStream baos = new ByteArrayOutputStream(); 48 final ObjectOutputStream oos = new ObjectOutputStream(baos); 49 50 oos.writeObject(h1); 51 oos.close(); 52 53 final byte[] data = baos.toByteArray(); 54 final ByteArrayInputStream bais = new ByteArrayInputStream(data); 55 final ObjectInputStream ois = new ObjectInputStream(bais); 56 57 final Object deserializedObject = ois.readObject(); 58 ois.close(); 59 60 if (false == h1.equals(deserializedObject)) { 61 throw new RuntimeException(getFailureText(h1, deserializedObject)); 62 } 63 } 64 65 private static String getFailureText(final Object orig, final Object copy) { 66 final StringWriter sw = new StringWriter(); 67 final PrintWriter pw = new PrintWriter(sw); 68 69 pw.println("Test FAILED: Deserialized object is not equal to the original object"); 70 pw.print("\tOriginal: "); 71 printObject(pw, orig).println(); 72 pw.print("\tCopy: "); 73 printObject(pw, copy).println(); 74 75 pw.close(); 76 return sw.toString(); 77 } 78 79 private static PrintWriter printObject(final PrintWriter pw, final Object o) { 80 pw.printf("%s@%08x", o.getClass().getName(), System.identityHashCode(o)); 81 return pw; 82 } 83 }