/*

 * Copyright (c) 2004, 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.

 */

/* Testcase that does a defineClass with a NULL name on HelloWorld.class */

import java.io.*;

public class DefineClass extends ClassLoader {

    public static void main(String args[]) {

        DefineClass t = new DefineClass();

        t.run(args);

    }

    public void run(String args[]) {

        Class n;

        byte b[] = new byte[10000];

        int len = 0;

        String cdir;

        String cfile;

        /* Class is found here: */

        cdir = System.getProperty("test.classes", ".");

        cfile = cdir + java.io.File.separator + "HelloWorld.class";

        try {

            /* Construct byte array with complete class image in it. */

            FileInputStream fis = new FileInputStream(cfile);

            int nbytes;

            do {

                nbytes = fis.read(b, len, b.length-len);

                if ( nbytes > 0 ) {

                    len += nbytes;

                }

            } while ( nbytes > 0 );

        } catch ( Throwable x ) {

            System.err.println("Cannot find " + cfile);

            x.printStackTrace();

        }

        /* Define the class with null for the name */

        n = defineClass(null, b, 0, len);

        /* Try to create an instance of it */

        try {

            n.newInstance();

        } catch ( Throwable x ) {

            x.printStackTrace();

        }

    }

}