test/jdk/java/io/Serializable/readObjectNoData/Read.java
author rriggs
Fri, 11 Oct 2019 13:11:56 -0400
changeset 58565 baa5969ecf34
parent 47216 71c04702a3d5
permissions -rw-r--r--
8231427: Warning cleanup in tests of java.io.Serializable Reviewed-by: darcy, lancea
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/*
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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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/*
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 * @bug 4363844
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 * @summary Verify that a custom readObjectNoData method, if defined properly
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 *          by a serializable superclass, gets invoked during deserialization
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 *          of a subclass instance whose serialized form omits a class
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 *          descriptor corresponding to the superclass.
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 */
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import java.io.*;
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/* Non-serializable superclass which defines readObjectNoData:
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 * readObjectNoData should not get called.
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 */
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class A {
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    private static final long serialVersionUID = 0L;
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    boolean aCalled = false;
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    private void readObjectNoData() throws ObjectStreamException {
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        aCalled = true;
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    }
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}
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/* Serializable superclass which defines readObjectNoData with wrong signature:
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 * readObjectNoData should not get called.
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 */
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class B extends A implements Serializable {
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    private static final long serialVersionUID = 0L;
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    boolean bCalled = false;
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    @SuppressWarnings("serial") /* Incorrect declarations are being tested */
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    private void readObjectNoData(int wrong) throws ObjectStreamException {
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        bCalled = true;
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    }
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}
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/* Serializable superclass which defines readObjectNoData correctly, and is not
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 * listed in stream: readObjectNoData should get called.
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 */
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class C extends B {
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    private static final long serialVersionUID = 0L;
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    boolean cCalled = false;
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    private void readObjectNoData() throws ObjectStreamException {
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        cCalled = true;
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    }
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}
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/* Serializable superclass which defines readObjectNoData correctly, but whose
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 * corresponding class descriptor is listed in stream: readObjectNoData should
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 * not get called.
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 */
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class D extends C {
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    private static final long serialVersionUID = 0L;
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    boolean dCalled = false;
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    private void readObjectNoData() throws ObjectStreamException {
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        dCalled = true;
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    }
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}
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/* Serializable superclass which defines readObjectNoData with wrong access:
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 * readObjectNoData should not get called.
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 */
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class E extends D {
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    private static final long serialVersionUID = 0L;
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    boolean eCalled = false;
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    @SuppressWarnings("serial") /* Incorrect declarations are being tested */
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    void readObjectNoData() throws ObjectStreamException {
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        eCalled = true;
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    }
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}
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/* Instance class.
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 */
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class F extends E {
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    private static final long serialVersionUID = 0L;
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}
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public class Read {
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    public static void main(String[] args) throws Exception {
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        FileInputStream in = new FileInputStream("tmp.ser");
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        try {
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            ObjectInputStream oin = new ObjectInputStream(in);
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            F f = (F) oin.readObject();
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            if (f.aCalled || f.bCalled || f.dCalled || f.eCalled) {
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                throw new Error("readObjectNoData invoked erroneously");
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            }
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            if (! f.cCalled) {
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                throw new Error("readObjectNoData not invoked");
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            }
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        } finally {
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            in.close();
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        }
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    }
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}