ClassForName.java

/*
 * Copyright (c) 2018, 2021, 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.URLClassLoader;

/*
 * This class is loaded by the custom URLClassLoader, and then calls
 * Class.forName() with the protection domain for the checkPackageAccess
 * call created from the code source jar file.
 */
public class ClassForName {
    static {
        if (!(ClassForName.class.getClassLoader() instanceof URLClassLoader)) {
            throw new RuntimeException("Supposed to be loaded by URLClassLoader");
        }
    }

    public ClassForName() {
        try {
            // class_loader = App$ClassLoader, protection_domain = ClassForName.getProtectionDomain()
            Class.forName(java.util.List.class.getName(), false,
                          ClassLoader.getSystemClassLoader());
        } catch (Throwable e) {
            e.printStackTrace();
        }
    }
}