/*

 * 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.lang.reflect.InvocationHandler;

import java.lang.reflect.Proxy;

/**

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

 */

public class ProxyClassDesc implements Benchmark {

    static interface A1 {};

    static interface A2 {};

    static interface A3 {};

    static interface A4 {};

    static interface A5 {};

    static interface B1 {};

    static interface B2 {};

    static interface B3 {};

    static interface B4 {};

    static interface B5 {};

    static interface C1 {};

    static interface C2 {};

    static interface C3 {};

    static interface C4 {};

    static interface C5 {};

    /**

     * Write and read proxy 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[] descs = genDescs();

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

        long start = System.currentTimeMillis();

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

        return System.currentTimeMillis() - start;

    }

    /**

     * Generate proxy class descriptors.

     */

    ObjectStreamClass[] genDescs() {

        ClassLoader ldr = ProxyClassDesc.class.getClassLoader();

        Class[] ifaces = new Class[3];

        Class[] a =

            new Class[] { A1.class, A2.class, A3.class, A4.class, A5.class };

        Class[] b =

            new Class[] { B1.class, B2.class, B3.class, B4.class, B5.class };

        Class[] c =

            new Class[] { C1.class, C2.class, C3.class, C4.class, C5.class };

        ObjectStreamClass[] descs =

            new ObjectStreamClass[a.length * b.length * c.length];

        int n = 0;

        for (int i = 0; i < a.length; i++) {

            ifaces[0] = a[i];

            for (int j = 0; j < b.length; j++) {

                ifaces[1] = b[j];

                for (int k = 0; k < c.length; k++) {

                    ifaces[2] = c[k];

                    Class proxyClass = Proxy.getProxyClass(ldr, ifaces);

                    descs[n++] = ObjectStreamClass.lookup(proxyClass);

                }

            }

        }

        return descs;

    }

    /**

     * Run benchmark for given number of cycles.

     */

    void doReps(ObjectOutputStream oout, ObjectInputStream oin,

                StreamBuffer sbuf, ObjectStreamClass[] descs, int ncycles)

        throws Exception

    {

        int ndescs = descs.length;

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

            sbuf.reset();

            oout.reset();

            for (int j = 0; j < ndescs; j++) {

                oout.writeObject(descs[j]);

            }

            oout.flush();

            for (int j = 0; j < ndescs; j++) {

                oin.readObject();

            }

        }

    }

}