/*
 * Copyright (c) 2020, 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
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import java.lang.instrument.ClassFileTransformer;
import java.lang.instrument.IllegalClassFormatException;
import java.security.ProtectionDomain;

public class RedefineClassesInModuleGraphTransformer implements ClassFileTransformer {
    public byte[] transform(ClassLoader loader, String name, Class<?> classBeingRedefined,
                            ProtectionDomain pd, byte[] buffer) throws IllegalClassFormatException {
        System.out.println("transforming " + name);

        if (name.equals("java/lang/Module")  ||
            name.equals("java/lang/ModuleLayer")  ||
            name.equals("java/lang/module/ResolvedModule")) {
            throw new RuntimeException("Classes used by the module graph should never be transformed by Java agent");
        }
        return null;
    }
}