J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2000 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* @test |
| 25 | * @summary Test proper functioning of class-defined writeReplace methods. |
| 26 | */ |
| 27 | |
| 28 | import java.io.*; |
| 29 | |
| 30 | public class WriteReplace { |
| 31 | |
| 32 | static class ReplaceMe implements Serializable { |
| 33 | private Object obj; |
| 34 | private boolean writeReplaceCalled = false; |
| 35 | |
| 36 | public ReplaceMe(Object obj) { |
| 37 | this.obj = obj; |
| 38 | } |
| 39 | |
| 40 | private Object writeReplace() throws ObjectStreamException { |
| 41 | if (writeReplaceCalled) { |
| 42 | throw new Error("multiple calls to writeReplace"); |
| 43 | } |
| 44 | writeReplaceCalled = true; |
| 45 | return obj; |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | public static void main(String[] args) throws Exception { |
| 50 | final int nobjs = 10; |
| 51 | final int nrounds = 10; |
| 52 | |
| 53 | Object common = "foo"; |
| 54 | ReplaceMe[] objs = new ReplaceMe[nobjs]; |
| 55 | for (int i = 0; i < nobjs; i++) { |
| 56 | objs[i] = new ReplaceMe(common); |
| 57 | } |
| 58 | |
| 59 | ByteArrayOutputStream bout = new ByteArrayOutputStream(); |
| 60 | ObjectOutputStream oout = new ObjectOutputStream(bout); |
| 61 | for (int i = 0; i < nrounds; i++) { |
| 62 | for (int j = 0; j < nobjs; j++) { |
| 63 | oout.writeObject(objs[j]); |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | oout.flush(); |
| 68 | ByteArrayInputStream bin = |
| 69 | new ByteArrayInputStream(bout.toByteArray()); |
| 70 | ObjectInputStream oin = new ObjectInputStream(bin); |
| 71 | common = null; |
| 72 | |
| 73 | for (int i = 0; i < nrounds; i++) { |
| 74 | for (int j = 0; j < nobjs; j++) { |
| 75 | if (common == null) { |
| 76 | common = oin.readObject(); |
| 77 | } else { |
| 78 | if (oin.readObject() != common) { |
| 79 | throw new Error("incorrect replacement object"); |
| 80 | } |
| 81 | } |
| 82 | } |
| 83 | } |
| 84 | } |
| 85 | } |