/*

 * Copyright (c) 2019, 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.net.URL;

import java.net.URLClassLoader;

import java.nio.file.Path;

import java.nio.file.Paths;

/*

 * @test

 * @bug 8231924 8233091 8233272

 * @summary Confirm load (but not link) behavior of Class.forName()

 * @library /test/lib

 *

 * @compile MissingClass.java Container.java

 *

 * @run driver ClassFileInstaller -jar classes.jar Container Container$1

 *

 * @run main/othervm NonLinking init

 * @run main/othervm NonLinking load

 */

/*

 * The @compile and '@main ClassFileInstaller' tasks above create a classes.jar

 * file containing the .class file for Container, but not MissingClass.

 */

public class NonLinking {

    public static void main(String[] args) throws Throwable {

        Path jarPath = Paths.get("classes.jar");

        URL url = jarPath.toUri().toURL();

        URLClassLoader ucl1 = new URLClassLoader("UCL1",

                                                 new URL[] { url },

                                                 null); // Don't delegate

        switch(args[0]) {

            case "init":

                try {

                    // Trying to initialize Container without MissingClass -> NCDFE

                    Class.forName("Container", true, ucl1);

                    throw new RuntimeException("Missed expected NoClassDefFoundError");

                } catch (NoClassDefFoundError expected) {

                    final String CLASSNAME = "MissingClass";

                    Throwable cause = expected.getCause();

                    if (!cause.getMessage().contains(CLASSNAME)) {

                        throw new RuntimeException("Cause of NoClassDefFoundError does not contain \"" + CLASSNAME + "\"", cause);

                    }

                }

                break;

            case "load":

                // Loading (but not linking) Container will succeed.

                // Before 8233091, this fails with NCDFE due to linking.

                Class.forName("Container", false, ucl1);

                break;

            default:

                throw new RuntimeException("Unknown command: " + args[0]);

        }

    }

}