1 /* 2 * Copyright (c) 2000, 2010, 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 * @bug 4363844 26 * @summary Verify that a custom readObjectNoData method, if defined properly 27 * by a serializable superclass, gets invoked during deserialization 28 * of a subclass instance whose serialized form omits a class 29 * descriptor corresponding to the superclass. 30 */ 31 32 import java.io.*; 33 34 /* Non-serializable superclass which defines readObjectNoData: 35 * readObjectNoData should not get called. 36 */ 37 class A { 38 private static final long serialVersionUID = 0L; 39 boolean aCalled = false; 40 private void readObjectNoData() throws ObjectStreamException { 41 aCalled = true; 42 } 43 } 44 45 /* Serializable superclass which defines readObjectNoData with wrong signature: 46 * readObjectNoData should not get called. 47 */ 48 class B extends A implements Serializable { 49 private static final long serialVersionUID = 0L; 50 boolean bCalled = false; 51 private void readObjectNoData(int wrong) throws ObjectStreamException { 52 bCalled = true; 53 } 54 } 55 56 /* Serializable superclass which defines readObjectNoData correctly, and is not 57 * listed in stream: readObjectNoData should get called. 58 */ 59 class C extends B { 60 private static final long serialVersionUID = 0L; 61 boolean cCalled = false; 62 private void readObjectNoData() throws ObjectStreamException { 63 cCalled = true; 64 } 65 } 66 67 /* Serializable superclass which defines readObjectNoData correctly, but whose 68 * corresponding class descriptor is listed in stream: readObjectNoData should 69 * not get called. 70 */ 71 class D extends C { 72 private static final long serialVersionUID = 0L; 73 boolean dCalled = false; 74 private void readObjectNoData() throws ObjectStreamException { 75 dCalled = true; 76 } 77 } 78 79 /* Serializable superclass which defines readObjectNoData with wrong access: 80 * readObjectNoData should not get called. 81 */ 82 class E extends D { 83 private static final long serialVersionUID = 0L; 84 boolean eCalled = false; 85 void readObjectNoData() throws ObjectStreamException { 86 eCalled = true; 87 } 88 } 89 90 /* Instance class. 91 */ 92 class F extends E { 93 private static final long serialVersionUID = 0L; 94 } 95 96 public class Read { 97 public static void main(String[] args) throws Exception { 98 FileInputStream in = new FileInputStream("tmp.ser"); 99 try { 100 ObjectInputStream oin = new ObjectInputStream(in); 101 F f = (F) oin.readObject(); 102 if (f.aCalled || f.bCalled || f.dCalled || f.eCalled) { 103 throw new Error("readObjectNoData invoked erroneously"); 104 } 105 if (! f.cCalled) { 106 throw new Error("readObjectNoData not invoked"); 107 } 108 } finally { 109 in.close(); 110 } 111 } 112 }