/*

 * Copyright 2000-2001 Sun Microsystems, Inc.  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 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.

 */

/* @test

 * @summary Test reading and writing from Pipes

 */

import java.io.*;

import java.nio.ByteBuffer;

import java.nio.channels.*;

import java.nio.channels.spi.SelectorProvider;

import java.util.Random;

/**

 * Testing PipeChannel

 */

public class PipeChannel {

    private static Random generator = new Random();

    public static void main(String[] args) throws Exception {

        for (int x=0; x<100; x++) {

            SelectorProvider sp = SelectorProvider.provider();

            Pipe p = sp.openPipe();

            Pipe.SinkChannel sink = p.sink();

            Pipe.SourceChannel source = p.source();

            ByteBuffer outgoingdata = ByteBuffer.allocateDirect(10);

            byte[] someBytes = new byte[10];

            generator.nextBytes(someBytes);

            outgoingdata.put(someBytes);

            outgoingdata.flip();

            int totalWritten = 0;

            while (totalWritten < 10) {

                int written = sink.write(outgoingdata);

                if (written < 0)

                    throw new Exception("Write failed");

                totalWritten += written;

            }

            ByteBuffer incomingdata = ByteBuffer.allocateDirect(10);

            int totalRead = 0;

            do {

                int bytesRead = source.read(incomingdata);

                if (bytesRead > 0)

                    totalRead += bytesRead;

            } while(totalRead < 10);

            for(int i=0; i<10; i++)

                if (outgoingdata.get(i) != incomingdata.get(i))

                    throw new Exception("Pipe failed");

            sink.close();

            source.close();

        }

    }

}