89 lines
2.9 KiB
Java
89 lines
2.9 KiB
Java
/*
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* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @summary Test proper functioning of class-defined writeReplace methods.
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*/
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import java.io.*;
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public class WriteReplace {
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static class ReplaceMe implements Serializable {
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private static final long serialVersionUID = 1L;
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@SuppressWarnings("serial") /* Incorrect use is being tested */
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private Object obj;
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private boolean writeReplaceCalled = false;
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public ReplaceMe(Object obj) {
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this.obj = obj;
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}
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private Object writeReplace() throws ObjectStreamException {
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if (writeReplaceCalled) {
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throw new Error("multiple calls to writeReplace");
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}
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writeReplaceCalled = true;
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return obj;
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}
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}
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public static void main(String[] args) throws Exception {
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final int nobjs = 10;
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final int nrounds = 10;
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Object common = "foo";
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ReplaceMe[] objs = new ReplaceMe[nobjs];
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for (int i = 0; i < nobjs; i++) {
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objs[i] = new ReplaceMe(common);
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}
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ByteArrayOutputStream bout = new ByteArrayOutputStream();
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ObjectOutputStream oout = new ObjectOutputStream(bout);
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for (int i = 0; i < nrounds; i++) {
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for (int j = 0; j < nobjs; j++) {
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oout.writeObject(objs[j]);
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}
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}
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oout.flush();
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ByteArrayInputStream bin =
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new ByteArrayInputStream(bout.toByteArray());
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ObjectInputStream oin = new ObjectInputStream(bin);
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common = null;
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for (int i = 0; i < nrounds; i++) {
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for (int j = 0; j < nobjs; j++) {
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if (common == null) {
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common = oin.readObject();
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} else {
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if (oin.readObject() != common) {
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throw new Error("incorrect replacement object");
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}
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}
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}
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}
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}
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}
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