91 lines
2.8 KiB
Java
91 lines
2.8 KiB
Java
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/*
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* Copyright 1999 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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/* @test
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* @bug 4217737
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* @clean NestedReplace A B C D
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* @build NestedReplace
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* @run main NestedReplace
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* @summary Ensure that replacement objects can nominate their own replacements,
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* so long as the replacement is not the same class as the
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* just-replaced object.
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*
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*/
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import java.io.*;
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class A implements Serializable {
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Object writeReplace() throws ObjectStreamException {
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return new B();
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}
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}
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class B implements Serializable {
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Object writeReplace() throws ObjectStreamException {
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return new C();
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}
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}
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class C implements Serializable {
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static int writeReplaceCalled = 0;
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Object writeReplace() throws ObjectStreamException {
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writeReplaceCalled++;
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return new C();
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}
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Object readResolve() throws ObjectStreamException {
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return new D();
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}
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}
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class D implements Serializable {
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Object readResolve() throws ObjectStreamException {
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throw new Error("readResolve() called more than once");
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}
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}
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public class NestedReplace {
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public static void main(String[] args) throws Exception {
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ByteArrayOutputStream bout;
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ObjectOutputStream oout;
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ByteArrayInputStream bin;
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ObjectInputStream oin;
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Object obj;
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bout = new ByteArrayOutputStream();
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oout = new ObjectOutputStream(bout);
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oout.writeObject(new A());
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oout.flush();
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bin = new ByteArrayInputStream(bout.toByteArray());
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oin = new ObjectInputStream(bin);
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obj = oin.readObject();
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if (! (obj instanceof D))
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throw new Error("Deserialized object is of wrong class");
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if (C.writeReplaceCalled != 1)
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throw new Error("C.writeReplace() should only get called once");
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}
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}
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