/*

 * Copyright (c) 2007, 2009, 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.

 */

/* @test

 * @bug 4640544

 * @summary Unit test for channels that implement NetworkChannel

 */

import java.nio.*;

import java.nio.channels.*;

import java.net.*;

import java.io.IOException;

import java.util.*;

public class NetworkChannelTests {

    static interface ChannelFactory {

        NetworkChannel open() throws IOException;

    }

    static class BogusSocketAddress extends SocketAddress {

    }

    /**

     * Exercise bind method.

     */

    static void bindTests(ChannelFactory factory) throws IOException {

        NetworkChannel ch;

        // AlreadyBoundException

        ch = factory.open().bind(new InetSocketAddress(0));

        try {

            ch.bind(new InetSocketAddress(0));

            throw new RuntimeException("AlreadyBoundException not thrown");

        } catch (AlreadyBoundException x) {

        }

        ch.close();

        // bind(null)

        ch = factory.open().bind(null);

        if (ch.getLocalAddress() == null)

            throw new RuntimeException("socket not found");

        ch.close();

        // UnsupportedAddressTypeException

        ch = factory.open();

        try {

            ch.bind(new BogusSocketAddress());

            throw new RuntimeException("UnsupportedAddressTypeException not thrown");

        } catch (UnsupportedAddressTypeException x) {

        }

        ch.close();

        // ClosedChannelException

        try {

            ch.bind(new InetSocketAddress(0));

            throw new RuntimeException("ClosedChannelException not thrown");

        } catch (ClosedChannelException x) {

        }

    }

    /**

     * Exercise getLocalAddress method.

     */

    static void localAddressTests(ChannelFactory factory) throws IOException {

        NetworkChannel ch;

        // not bound

        ch = factory.open();

        if (ch.getLocalAddress() != null) {

            throw new RuntimeException("Local address returned when not bound");

        }

        // bound

        InetSocketAddress local =

            (InetSocketAddress)(ch.bind(new InetSocketAddress(0)).getLocalAddress());

        if (!local.getAddress().isAnyLocalAddress()) {

            if (NetworkInterface.getByInetAddress(local.getAddress()) == null)

                throw new RuntimeException("not bound to local address");

        }

        if (local.getPort() <= 0)

            throw new RuntimeException("not bound to local port");

        // closed

        ch.close();

        try {

            ch.getLocalAddress();

            throw new RuntimeException("ClosedChannelException expected");

        } catch (ClosedChannelException e) { }

    }

    /**

     * Exercise getRemoteAddress method (SocketChannel only)

     */

    static void connectedAddressTests() throws IOException {

        ServerSocketChannel ssc = ServerSocketChannel.open()

            .bind(new InetSocketAddress(0));

        InetSocketAddress local = (InetSocketAddress)(ssc.getLocalAddress());

        int port = local.getPort();

        InetSocketAddress server = new InetSocketAddress(InetAddress.getLocalHost(), port);

        SocketChannel sc = SocketChannel.open();

        // not connected

        if (sc.getRemoteAddress() != null)

            throw new RuntimeException("getRemoteAddress returned address when not connected");

        // connected

        sc.connect(server);

        SocketAddress remote = sc.getRemoteAddress();

        if (!remote.equals(server))

            throw new RuntimeException("getRemoteAddress returned incorrect address");

        // closed

        sc.close();

        try {

            sc.getRemoteAddress();

            throw new RuntimeException("ClosedChannelException expected");

        } catch (ClosedChannelException e) { }

        ssc.close();

    }

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

        ChannelFactory factory;

        // -- SocketChannel --

        factory = new ChannelFactory() {

            public NetworkChannel open() throws IOException {

                return SocketChannel.open();

            }

        };

        bindTests(factory);

        localAddressTests(factory);

        connectedAddressTests();

        // -- ServerSocketChannel --

        factory = new ChannelFactory() {

            public NetworkChannel open() throws IOException {

                return ServerSocketChannel.open();

            }

        };

        bindTests(factory);

        localAddressTests(factory);

        // backlog values

        ServerSocketChannel.open()

            .bind(new InetSocketAddress(0), 100).close();

        ServerSocketChannel.open()

            .bind(new InetSocketAddress(0), 0).close();

        ServerSocketChannel.open()

            .bind(new InetSocketAddress(0), -1).close();

        // -- DatagramChannel --

        factory = new ChannelFactory() {

            public NetworkChannel open() throws IOException {

                return DatagramChannel.open();

            }

        };

        bindTests(factory);

        localAddressTests(factory);

    }

}