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/*
* Copyright (c) 2000, 2017, 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
* @bug 4325590
* @library /lib/testlibrary
* @build JarUtils A B
* @run main SuperclassDataLossTest
* @summary Verify that superclass data is not lost when incoming superclass
* descriptor is matched with local class that is not a superclass of
* the deserialized instance's class.
*/
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.ObjectStreamClass;
import java.net.URL;
import java.net.URLClassLoader;
import java.net.MalformedURLException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
class MixedSuperclassStream extends ObjectInputStream {
private boolean ldr12A;
private URLClassLoader ldr1;
private URLClassLoader ldr2;
MixedSuperclassStream(InputStream in, URLClassLoader ldr1,
URLClassLoader ldr2, boolean ldr1First) throws IOException {
super(in);
this.ldr1 = ldr1;
this.ldr2 = ldr2;
this.ldr12A = ldr12A;
}
protected Class resolveClass(ObjectStreamClass desc)
throws IOException, ClassNotFoundException
{
// resolve A's classdesc to class != B's superclass
String name = desc.getName();
if (ldr12A) {
if (name.equals("A")) {
return Class.forName(name, true, ldr1);
} else if (name.equals("B")) {
return Class.forName(name, true, ldr2);
}
} else {
if (name.equals("B")) {
return Class.forName(name, true, ldr1);
} else if (name.equals("A")) {
return Class.forName(name, true, ldr2);
}
}
return super.resolveClass(desc);
}
}
public class SuperclassDataLossTest {
public static void main(String[] args) throws Exception {
try (URLClassLoader ldr1 = new URLClassLoader(new URL[] { new URL("file:cb1.jar") });
URLClassLoader ldr2 = new URLClassLoader(new URL[] { new URL("file:cb2.jar") })) {
setup();
Runnable a = (Runnable) Class.forName("B", true, ldr1).newInstance();
a.run();
ByteArrayOutputStream bout = new ByteArrayOutputStream();
ObjectOutputStream oout = new ObjectOutputStream(bout);
oout.writeObject(a);
oout.close();
test(bout, ldr1, ldr2, true);
test(bout, ldr1, ldr2, false);
}
}
private static void test(ByteArrayOutputStream bout, URLClassLoader ldr1,
URLClassLoader ldr2, boolean ldr12A) throws Exception {
ByteArrayInputStream bin =
new ByteArrayInputStream(bout.toByteArray());
ObjectInputStream oin = new MixedSuperclassStream(bin, ldr1, ldr2, ldr12A);
Runnable a = (Runnable) oin.readObject();
a.run();
}
private static void setup() throws Exception {
Path classes = Paths.get(System.getProperty("test.classes", ""));
JarUtils.createJarFile(Paths.get("cb1.jar"), classes,
classes.resolve("A.class"), classes.resolve("B.class"));
Files.copy(Paths.get("cb1.jar"), Paths.get("cb2.jar"),
StandardCopyOption.REPLACE_EXISTING);
}
}
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