/*

 * 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.

 */

/* @test

 * @bug 4865031

 * @summary Test ScatteringByteChannel/GatheringByteChannel read/write

 */

import java.io.*;

import java.net.*;

import java.nio.*;

import java.nio.channels.*;

public class VectorParams {

    static java.io.PrintStream out = System.out;

    static final int testSize = 10;

    static ByteBuffer[] bufs = null;

    static InetSocketAddress isa = null;

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

        try (TestServers.DayTimeServer daytimeServer

                = TestServers.DayTimeServer.startNewServer(100)) {

            initBufs(daytimeServer);

            testSocketChannelVectorParams();

            testDatagramChannelVectorParams();

            testPipeVectorParams();

            testFileVectorParams();

        }

    }

    static void initBufs(TestServers.DayTimeServer daytimeServer) throws Exception {

        bufs = new ByteBuffer[testSize];

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

            String source = "buffer" + i;

            bufs[i] = ByteBuffer.allocate(source.length());

            bufs[i].put(source.getBytes("8859_1"));

            bufs[i].flip();

        }

        isa = new InetSocketAddress(daytimeServer.getAddress(),

                                    daytimeServer.getPort());

    }

    static void testSocketChannelVectorParams() throws Exception {

        SocketChannel sc = SocketChannel.open(isa);

        tryBadWrite(sc, bufs, 0, -1);

        tryBadWrite(sc, bufs, -1, 0);

        tryBadWrite(sc, bufs, 0, 1000);

        tryBadWrite(sc, bufs, 1000, 1);

        tryBadRead(sc, bufs, 0, -1);

        tryBadRead(sc, bufs, -1, 0);

        tryBadRead(sc, bufs, 0, 1000);

        tryBadRead(sc, bufs, 1000, 1);

        sc.close();

    }

    static void testDatagramChannelVectorParams() throws Exception {

        DatagramChannel dc = DatagramChannel.open();

        dc.connect(isa);

        tryBadRead(dc, bufs, 0, -1);

        tryBadRead(dc, bufs, -1, 0);

        tryBadRead(dc, bufs, 0, 1000);

        tryBadRead(dc, bufs, 1000, 1);

        tryBadWrite(dc, bufs, 0, -1);

        tryBadWrite(dc, bufs, -1, 0);

        tryBadWrite(dc, bufs, 0, 1000);

        tryBadWrite(dc, bufs, 1000, 1);

        dc.close();

    }

    static void testPipeVectorParams() throws Exception {

        Pipe p = Pipe.open();

        Pipe.SinkChannel sink = p.sink();

        Pipe.SourceChannel source = p.source();

        tryBadWrite(sink, bufs, 0, -1);

        tryBadWrite(sink, bufs, -1, 0);

        tryBadWrite(sink, bufs, 0, 1000);

        tryBadWrite(sink, bufs, 1000, 1);

        tryBadRead(source, bufs, 0, -1);

        tryBadRead(source, bufs, -1, 0);

        tryBadRead(source, bufs, 0, 1000);

        tryBadRead(source, bufs, 1000, 1);

        sink.close();

        source.close();

    }

    static void testFileVectorParams() throws Exception {

        File testFile = File.createTempFile("filevec", null);

        testFile.deleteOnExit();

        RandomAccessFile raf = new RandomAccessFile(testFile, "rw");

        FileChannel fc = raf.getChannel();

        tryBadWrite(fc, bufs, 0, -1);

        tryBadWrite(fc, bufs, -1, 0);

        tryBadWrite(fc, bufs, 0, 1000);

        tryBadWrite(fc, bufs, 1000, 1);

        tryBadRead(fc, bufs, 0, -1);

        tryBadRead(fc, bufs, -1, 0);

        tryBadRead(fc, bufs, 0, 1000);

        tryBadRead(fc, bufs, 1000, 1);

        fc.close();

    }

    private static void tryBadWrite(GatheringByteChannel gbc,

                                    ByteBuffer[] bufs, int offset, int len)

        throws Exception

    {

        try {

            gbc.write(bufs, offset, len);

            throw new RuntimeException("Expected exception not thrown");

        } catch (IndexOutOfBoundsException ioobe) {

            // Correct result

        }

    }

    private static void tryBadRead(ScatteringByteChannel sbc,

                                   ByteBuffer[] bufs, int offset, int len)

        throws Exception

    {

        try {

            sbc.read(bufs, offset, len);

            throw new RuntimeException("Expected exception not thrown");

        } catch (IndexOutOfBoundsException ioobe) {

            // Correct result

        }

    }

}