test/jdk/java/io/Serializable/proxy/Basic.java
author rriggs
Fri, 11 Oct 2019 13:11:56 -0400
changeset 58565 baa5969ecf34
parent 47216 71c04702a3d5
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) 2000, 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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 * @summary Verifies basic correct functioning of proxy serialization.
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 * @key randomness
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 */
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import java.io.*;
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import java.lang.reflect.*;
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import java.util.Random;
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// proxy interfaces
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interface Foo { int foo(); }
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interface Bar { float bar(); }
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// dummy invocation handler
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class Handler implements InvocationHandler, Serializable {
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    private static final long serialVersionUID = 1L;
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    static Method fooMethod, barMethod;
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    static {
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        try {
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            fooMethod = Foo.class.getDeclaredMethod("foo", new Class<?>[0]);
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            barMethod = Bar.class.getDeclaredMethod("bar", new Class<?>[0]);
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        } catch (NoSuchMethodException ex) {
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            throw new Error();
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        }
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    }
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    int foo;
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    float bar;
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    Handler(int foo, float bar) {
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        this.foo = foo;
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        this.bar = bar;
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    }
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    public Object invoke(Object proxy, Method method, Object[] args)
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        throws Throwable
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    {
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        if (method.equals(fooMethod)) {
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            return foo;
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        } else if (method.equals(barMethod)) {
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            return bar;
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        } else {
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            throw new UnsupportedOperationException();
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        }
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    }
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}
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// ObjectInputStream incapable of resolving proxy classes
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class ProxyBlindInputStream extends ObjectInputStream {
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    ProxyBlindInputStream(InputStream in) throws IOException { super(in); }
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    protected Class<?> resolveProxyClass(String[] interfaces)
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        throws IOException, ClassNotFoundException
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    {
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        throw new ClassNotFoundException();
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    }
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}
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public class Basic {
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    public static void main(String[] args) throws Exception {
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        ClassLoader loader = Basic.class.getClassLoader();
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        Class<?>[] interfaces = { Foo.class, Bar.class };
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        Random rand = new Random();
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        int foo = rand.nextInt();
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        float bar = rand.nextFloat();
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        ObjectOutputStream oout;
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        ObjectInputStream oin;
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        ByteArrayOutputStream bout;
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        Object proxy;
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        // test simple proxy write + read
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        bout = new ByteArrayOutputStream();
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        oout = new ObjectOutputStream(bout);
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        oout.writeObject(Proxy.newProxyInstance(
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            loader, interfaces, new Handler(foo, bar)));
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        oout.close();
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        oin = new ObjectInputStream(
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            new ByteArrayInputStream(bout.toByteArray()));
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        proxy = oin.readObject();
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        if ((((Foo) proxy).foo() != foo) || (((Bar) proxy).bar() != bar)) {
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            throw new Error();
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        }
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        // test missing proxy class ClassNotFoundException
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        oin = new ProxyBlindInputStream(
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            new ByteArrayInputStream(bout.toByteArray()));
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        try {
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            oin.readObject();
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            throw new Error();
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        } catch (ClassNotFoundException ex) {
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        }
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    }
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}