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