/*

 * Copyright (c) 2014, 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.

 */

import java.io.DataInputStream;

import java.io.File;

import java.io.FileInputStream;

import java.lang.instrument.ClassDefinition;

import java.lang.instrument.Instrumentation;

/*

 * This class is present during compilation, but will be deleted before execution.

 */

class MyUnresolvedClass {

    static void bar() {

    }

}

class MyRedefinedClass {

    static void foo() {

        MyUnresolvedClass.bar();

    }

}

public class UnresolvedClassAgent {

    public static void main(String... args) {

    }

    public static void premain(String args, Instrumentation inst) throws Exception {

        try {

            MyRedefinedClass.foo();

        } catch(NoClassDefFoundError err) {

            System.out.println("NoClassDefFoundError (expected)");

        }

        File f = new File(System.getProperty("test.classes"), "MyRedefinedClass.class");

        byte[] buf = new byte[(int)f.length()];

        try (DataInputStream dis = new DataInputStream(new FileInputStream(f))) {

            dis.readFully(buf);

        }

        ClassDefinition cd = new ClassDefinition(MyRedefinedClass.class, buf);

        inst.redefineClasses(new ClassDefinition[] {cd});

        try {

            MyRedefinedClass.foo();

        } catch(NoClassDefFoundError err) {

            System.out.println("NoClassDefFoundError (expected again)");

        }

    }

}