test/jdk/java/io/Serializable/packageAccess/PackageAccessTest.java
author rriggs
Fri, 11 Oct 2019 13:11:56 -0400
changeset 58565 baa5969ecf34
parent 51977 a8862960c19f
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) 2002, 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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 * @test
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 * @bug 4765255
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 * @library /test/lib
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 * @build jdk.test.lib.util.JarUtils A B C D PackageAccessTest
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 * @run main PackageAccessTest
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 * @summary Verify proper functioning of package equality checks used to
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 *          determine accessibility of superclass constructor and inherited
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 *          writeReplace/readResolve methods.
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 */
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.InputStream;
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import java.io.IOException;
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import java.io.ObjectInputStream;
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import java.io.ObjectOutputStream;
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import java.io.ObjectStreamClass;
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import java.io.InvalidClassException;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import jdk.test.lib.util.JarUtils;
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public class PackageAccessTest {
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    static Class<?> bcl;
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    static Class<?> dcl;
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    public static void main(String[] args) throws Exception {
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        setup();
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        try (URLClassLoader ldr =
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            new URLClassLoader(new URL[]{ new URL("file:foo.jar") },
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                    PackageAccessTest.class.getClassLoader())) {
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            bcl = Class.forName("B", true, ldr);
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            dcl = Class.forName("D", true, ldr);
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            Object b = bcl.getConstructor().newInstance();
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            try {
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                swizzle(b);
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                throw new Error("expected InvalidClassException for class B");
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            } catch (InvalidClassException e) {
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                System.out.println("caught " + e);
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                e.printStackTrace();
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            }
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            if (A.packagePrivateConstructorInvoked) {
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                throw new Error("package private constructor of A invoked");
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            }
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            Object d = dcl.getConstructor().newInstance();
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            swizzle(d);
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        }
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    }
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    static void swizzle(Object obj) 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(obj);
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        oout.close();
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        ByteArrayInputStream bin =
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            new ByteArrayInputStream(bout.toByteArray());
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        new TestObjectInputStream(bin).readObject();
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    }
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    static void setup() throws Exception {
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        Path classes = Paths.get(System.getProperty("test.classes", ""));
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        JarUtils.createJarFile(Paths.get("foo.jar"), classes,
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                classes.resolve("B.class"), classes.resolve("D.class"));
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        Files.delete(classes.resolve("B.class"));
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        Files.delete(classes.resolve("D.class"));
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    }
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}
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class TestObjectInputStream extends ObjectInputStream {
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    TestObjectInputStream(InputStream in) throws IOException {
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        super(in);
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    }
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    protected Class<?> resolveClass(ObjectStreamClass desc)
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        throws IOException, ClassNotFoundException
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    {
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        String n = desc.getName();
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        if (n.equals("B")) {
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            return PackageAccessTest.bcl;
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        } else if (n.equals("D")) {
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            return PackageAccessTest.dcl;
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        } else {
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            return super.resolveClass(desc);
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        }
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    }
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}