73 lines
2.3 KiB
Java
73 lines
2.3 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 4253271
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* @summary Ensure that ObjectInputStream.readObject() is called, it doesn't
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* read past the end of the object in the underlying stream.
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*/
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import java.io.*;
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class LimitInputStream extends ByteArrayInputStream {
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int limit;
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LimitInputStream(byte[] b) {
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super(b);
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limit = b.length;
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}
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public int read() {
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if (limit < 1)
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throw new Error("limit exceeded");
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int c = super.read();
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if (c != -1)
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limit--;
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return c;
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}
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public int read(byte[] b) {
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return read(b, 0, b.length);
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}
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public int read(byte[] b, int off, int len) {
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if (limit < len)
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throw new Error("limit exceeded");
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int n = super.read(b, off, len);
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if (n != -1)
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limit -= n;
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return n;
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}
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}
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public class ReadPastObject {
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public static void main(String[] args) throws Exception {
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ByteArrayOutputStream bout = new ByteArrayOutputStream();
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ObjectOutputStream oout = new ObjectOutputStream(bout);
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oout.writeObject("foo");
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LimitInputStream lin = new LimitInputStream(bout.toByteArray());
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ObjectInputStream oin = new ObjectInputStream(lin);
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System.out.println(oin.readObject());
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}
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}
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