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