78 lines
2.7 KiB
Java
78 lines
2.7 KiB
Java
/*
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* Copyright (c) 1998, 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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* @clean A WriteObjectMemory
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* @run main WriteObjectMemory
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* @bug 4146453 5011410
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* @summary Test that regrow of object/handle table of ObjectOutputStream works.
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*/
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import java.io.*;
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import java.util.HashSet;
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import java.util.Iterator;
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class A implements Serializable {
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private static final long serialVersionUID = 1L;
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static HashSet<A>writeObjectExtent = new HashSet<>();
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private void writeObject(ObjectOutputStream out) throws IOException {
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if (writeObjectExtent.contains(this)) {
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throw new InvalidObjectException("writeObject: object " +
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this.toString() + " has already "
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+ "been serialized and should " +
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"have be serialized by reference.");
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} else {
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writeObjectExtent.add(this);
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}
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out.defaultWriteObject();
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}
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A() {
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}
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}
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public class WriteObjectMemory {
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public static void main(String args[])
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throws IOException
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{
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ObjectOutputStream out =
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new ObjectOutputStream(new ByteArrayOutputStream(3000));
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for (int i = 0; i < 1000; i++) {
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out.writeObject(new A());
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}
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// Make sure that serialization subsystem does not
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// allow writeObject to be called on any objects that
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// have already been serialized. These objects should be
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// written out by reference.
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Iterator<A> iter = A.writeObjectExtent.iterator();
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while (iter.hasNext()) {
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out.writeObject(iter.next());
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}
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out.close();
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}
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}
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