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/*
* Copyright (c) 1999, 2019, 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
* @bug 4217737
* @clean NestedReplace A B C D
* @build NestedReplace
* @run main NestedReplace
* @summary Ensure that replacement objects can nominate their own replacements,
* so long as the replacement is not the same class as the
* just-replaced object.
*
*/
import java.io.*;
class A implements Serializable {
private static final long serialVersionUID = 1L;
Object writeReplace() throws ObjectStreamException {
return new B();
}
}
class B implements Serializable {
private static final long serialVersionUID = 1L;
Object writeReplace() throws ObjectStreamException {
return new C();
}
}
class C implements Serializable {
private static final long serialVersionUID = 1L;
static int writeReplaceCalled = 0;
Object writeReplace() throws ObjectStreamException {
writeReplaceCalled++;
return new C();
}
Object readResolve() throws ObjectStreamException {
return new D();
}
}
class D implements Serializable {
private static final long serialVersionUID = 1L;
Object readResolve() throws ObjectStreamException {
throw new Error("readResolve() called more than once");
}
}
public class NestedReplace {
public static void main(String[] args) throws Exception {
ByteArrayOutputStream bout;
ObjectOutputStream oout;
ByteArrayInputStream bin;
ObjectInputStream oin;
Object obj;
bout = new ByteArrayOutputStream();
oout = new ObjectOutputStream(bout);
oout.writeObject(new A());
oout.flush();
bin = new ByteArrayInputStream(bout.toByteArray());
oin = new ObjectInputStream(bin);
obj = oin.readObject();
if (! (obj instanceof D))
throw new Error("Deserialized object is of wrong class");
if (C.writeReplaceCalled != 1)
throw new Error("C.writeReplace() should only get called once");
}
}
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