/*

 * Copyright (c) 2017, 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.

 *

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 */

/*

 * @test

 * @bug 8187222

 * @run main/othervm -Djava.system.class.loader=RecursiveSystemLoader RecursiveSystemLoader

 * @summary Test for IllegalStateException if a custom system loader recursively calls getSystemClassLoader()

 */

public class RecursiveSystemLoader extends ClassLoader {

    public static void main(String[] args) {

        ClassLoader sys = ClassLoader.getSystemClassLoader();

        if (!(sys instanceof RecursiveSystemLoader)) {

            throw new RuntimeException("Unexpected system classloader: " + sys);

        }

    }

    public RecursiveSystemLoader(ClassLoader classLoader) {

        super("RecursiveSystemLoader", classLoader);

        // Calling ClassLoader.getSystemClassLoader() before the VM is booted

        // should throw an IllegalStateException.

        try {

            ClassLoader.getSystemClassLoader();

        } catch(IllegalStateException ise) {

            System.err.println("Caught expected exception:");

            ise.printStackTrace();

            return;

        }

        throw new RuntimeException("Expected IllegalStateException was not thrown.");

    }

    @Override

    public Class<?> loadClass(String name) throws ClassNotFoundException {

        return super.loadClass(name);

    }

}