/*

 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

/*

 *

 */

package bench.serial;

import bench.Benchmark;

import java.io.ObjectInputStream;

import java.io.ObjectOutputStream;

import java.io.ObjectStreamClass;

import java.io.Serializable;

/**

 * Benchmark for testing speed of class descriptor reads/writes.

 */

public class ClassDesc implements Benchmark {

    static class Dummy0 implements Serializable { Dummy0 i0; }

    static class Dummy1 extends Dummy0 { Dummy1 i1; }

    static class Dummy2 extends Dummy1 { Dummy2 i2; }

    static class Dummy3 extends Dummy2 { Dummy3 i3; }

    static class Dummy4 extends Dummy3 { Dummy4 i4; }

    static class Dummy5 extends Dummy4 { Dummy5 i5; }

    static class Dummy6 extends Dummy5 { Dummy6 i6; }

    static class Dummy7 extends Dummy6 { Dummy7 i7; }

    static class Dummy8 extends Dummy7 { Dummy8 i8; }

    static class Dummy9 extends Dummy8 { Dummy9 i9; }

    static class Dummy10 extends Dummy9 { Dummy10 i10; }

    static class Dummy11 extends Dummy10 { Dummy11 i11; }

    static class Dummy12 extends Dummy11 { Dummy12 i12; }

    static class Dummy13 extends Dummy12 { Dummy13 i13; }

    static class Dummy14 extends Dummy13 { Dummy14 i14; }

    static class Dummy15 extends Dummy14 { Dummy15 i15; }

    static class Dummy16 extends Dummy15 { Dummy16 i16; }

    static class Dummy17 extends Dummy16 { Dummy17 i17; }

    static class Dummy18 extends Dummy17 { Dummy18 i18; }

    static class Dummy19 extends Dummy18 { Dummy19 i19; }

    static class Dummy20 extends Dummy19 { Dummy20 i20; }

    static class Dummy21 extends Dummy20 { Dummy21 i21; }

    static class Dummy22 extends Dummy21 { Dummy22 i22; }

    static class Dummy23 extends Dummy22 { Dummy23 i23; }

    static class Dummy24 extends Dummy23 { Dummy24 i24; }

    static class Dummy25 extends Dummy24 { Dummy25 i25; }

    static class Dummy26 extends Dummy25 { Dummy26 i26; }

    static class Dummy27 extends Dummy26 { Dummy27 i27; }

    static class Dummy28 extends Dummy27 { Dummy28 i28; }

    static class Dummy29 extends Dummy28 { Dummy29 i29; }

    static class Dummy30 extends Dummy29 { Dummy30 i30; }

    static class Dummy31 extends Dummy30 { Dummy31 i31; }

    static class Dummy32 extends Dummy31 { Dummy32 i32; }

    static class Dummy33 extends Dummy32 { Dummy33 i33; }

    static class Dummy34 extends Dummy33 { Dummy34 i34; }

    static class Dummy35 extends Dummy34 { Dummy35 i35; }

    static class Dummy36 extends Dummy35 { Dummy36 i36; }

    static class Dummy37 extends Dummy36 { Dummy37 i37; }

    static class Dummy38 extends Dummy37 { Dummy38 i38; }

    static class Dummy39 extends Dummy38 { Dummy39 i39; }

    static class Dummy40 extends Dummy39 { Dummy40 i40; }

    static class Dummy41 extends Dummy40 { Dummy41 i41; }

    static class Dummy42 extends Dummy41 { Dummy42 i42; }

    static class Dummy43 extends Dummy42 { Dummy43 i43; }

    static class Dummy44 extends Dummy43 { Dummy44 i44; }

    static class Dummy45 extends Dummy44 { Dummy45 i45; }

    static class Dummy46 extends Dummy45 { Dummy46 i46; }

    static class Dummy47 extends Dummy46 { Dummy47 i47; }

    static class Dummy48 extends Dummy47 { Dummy48 i48; }

    static class Dummy49 extends Dummy48 { Dummy49 i49; }

    static class Dummy50 extends Dummy49 { Dummy50 i50; }

    /**

     * Write and read class descriptors to/from a stream.

     * Arguments: <# cycles>

     */

    public long run(String[] args) throws Exception {

        int ncycles = Integer.parseInt(args[0]);

        StreamBuffer sbuf = new StreamBuffer();

        ObjectOutputStream oout =

            new ObjectOutputStream(sbuf.getOutputStream());

        ObjectInputStream oin =

            new ObjectInputStream(sbuf.getInputStream());

        ObjectStreamClass desc = ObjectStreamClass.lookup(Dummy50.class);

        doReps(oout, oin, sbuf, desc, 1);       // warmup

        long start = System.currentTimeMillis();

        doReps(oout, oin, sbuf, desc, ncycles);

        return System.currentTimeMillis() - start;

    }

    /**

     * Run benchmark for given number of cycles.

     */

    void doReps(ObjectOutputStream oout, ObjectInputStream oin,

                StreamBuffer sbuf, ObjectStreamClass desc, int ncycles)

        throws Exception

    {

        for (int i = 0; i < ncycles; i++) {

            sbuf.reset();

            oout.reset();

            oout.writeObject(desc);

            oout.flush();

            oin.readObject();

        }

    }

}