/*

 * Copyright (c) 2012, 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.

 *

 */

public class VictimClassLoader extends ClassLoader {

    public static long counter = 0;

    private int which = (int) ++counter;

    protected VictimClassLoader() {

        super(VictimClassLoader.class.getClassLoader());

    }

    protected Class loadClass(String name, boolean resolve) throws ClassNotFoundException {

        Class c;

        if (!name.endsWith("Victim")) {

            c = super.loadClass(name, resolve);

            return c;

        }

        c = findLoadedClass(name);

        if (c != null) {

            return c;

        }

        byte[] buf = readClassFile(name);

        c = defineClass(name, buf, 0, buf.length);

        resolveClass(c);

        if (c.getClassLoader() != this) {

            throw new AssertionError();

        }

        Test8003720.println("loaded " + c + "#" + System.identityHashCode(c) + " in " + c.getClassLoader());

        return c;

    }

    static byte[] readClassFile(String name) {

        try {

            String rname = name.substring(name.lastIndexOf('.') + 1) + ".class";

            java.net.URL url = VictimClassLoader.class.getResource(rname);

            Test8003720.println("found " + rname + " = " + url);

            java.net.URLConnection connection = url.openConnection();

            int contentLength = connection.getContentLength();

            byte[] buf = readFully(connection.getInputStream(), contentLength);

            return Asmator.fixup(buf);

        } catch (java.io.IOException ex) {

            throw new Error(ex);

        }

    }

    static byte[] readFully(java.io.InputStream in, int len) throws java.io.IOException {

        byte[] b = in.readAllBytes();

        if (len != -1 && b.length != len)

            throw new java.io.IOException("Expected:" + len + ", actual:" + b.length);

        return b;

    }

    public void finalize() {

        Test8003720.println("Goodbye from " + this);

    }

    public String toString() {

        return "VictimClassLoader#" + which;

    }

}