/*

 * Copyright 2003-2005 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

/**

 * @test

 * @bug 4882798 5067523

 * @summary insure redefine is supported. exercise a class, then redefine it and do it again

 * @author Gabriel Adauto, Wily Technology

 *

 * @run build RedefineClassesTests

 * @run shell RedefineSetUp.sh

 * @run shell MakeJAR.sh redefineAgent

 * @run main/othervm -javaagent:redefineAgent.jar RedefineClassesTests RedefineClassesTests

 */

import java.io.*;

import java.lang.instrument.*;

import java.lang.reflect.*;

public class

RedefineClassesTests

    extends ASimpleInstrumentationTestCase

{

    /**

     * Constructor for RedefineClassesTests.

     * @param name

     */

    public RedefineClassesTests(String name)

    {

        super(name);

    }

    public static void

    main (String[] args)

        throws Throwable {

        ATestCaseScaffold   test = new RedefineClassesTests(args[0]);

        test.runTest();

    }

    protected final void

    doRunTest()

        throws Throwable {

        testIsRedefineClassesSupported();

        testSimpleRedefineClasses();

        testUnmodifiableClassException();

    }

    public void

    testIsRedefineClassesSupported()

    {

        boolean canRedef = fInst.isRedefineClassesSupported();

        assertTrue("Cannot redefine classes", canRedef);

    }

    public void

    testSimpleRedefineClasses()

        throws Throwable

    {

        // first load the class and prove that it is the right one

        ExampleRedefine ex = new ExampleRedefine();

        // with this version of the class, doSomething is a nop

        int firstGet = ex.get();

        ex.doSomething();

        int secondGet = ex.get();

        assertEquals(firstGet, secondGet);

        // now redefine the class. This will change doSomething to be an increment

        // this class is stored in a different place (scratch directory) to avoid collisions

        File f = new File("Different_ExampleRedefine.class");

        System.out.println("Reading test class from " + f);

        InputStream redefineStream = new FileInputStream(f);

        byte[] redefineBuffer = NamedBuffer.loadBufferFromStream(redefineStream);

        ClassDefinition redefineParamBlock = new ClassDefinition(   ExampleRedefine.class,

                                                                    redefineBuffer);

        fInst.redefineClasses(new ClassDefinition[] {redefineParamBlock});

        int thirdGet = ex.get();

        ex.doSomething();

        int fourthGet = ex.get();

        assertEquals(thirdGet + 1, fourthGet);

    }

    public void

    testUnmodifiableClassException()

        throws Throwable

    {

        System.out.println("Testing UnmodifiableClassException");

        // Load any class

        File f = new File("Different_ExampleRedefine.class");

        InputStream redefineStream = new FileInputStream(f);

        byte[] redefineBuffer = NamedBuffer.loadBufferFromStream(redefineStream);

        System.out.println("Try to redefine class for primitive type");

        try {

            ClassDefinition redefineParamBlock =

                new ClassDefinition( byte.class, redefineBuffer );

            fInst.redefineClasses(new ClassDefinition[] {redefineParamBlock});

            fail();

        } catch (UnmodifiableClassException x) {

        }

        System.out.println("Try to redefine class for array type");

        try {

            ClassDefinition redefineParamBlock =

                new ClassDefinition( byte[].class, redefineBuffer );

            fInst.redefineClasses(new ClassDefinition[] {redefineParamBlock});

            fail();

        } catch (UnmodifiableClassException x) {

        }

    }

}