/*

 * Copyright (c) 2002, 2010, 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.

 */

/**

 * Utility class for tests. A simple "in-thread" server to accept connections

 * and write bytes.

 * @author kladko

 */

import java.net.Socket;

import java.net.ServerSocket;

import java.net.SocketAddress;

import java.net.InetSocketAddress;

import java.io.IOException;

import java.io.Closeable;

public class ByteServer implements Closeable {

    private final ServerSocket ss;

    private Socket s;

    ByteServer() throws IOException {

        this.ss = new ServerSocket(0);

    }

    SocketAddress address() {

        return new InetSocketAddress(ss.getInetAddress(), ss.getLocalPort());

    }

    void acceptConnection() throws IOException {

        if (s != null)

            throw new IllegalStateException("already connected");

        this.s = ss.accept();

    }

    void closeConnection() throws IOException {

        Socket s = this.s;

        if (s != null) {

            this.s = null;

            s.close();

        }

    }

    void write(int count) throws IOException {

        if (s == null)

            throw new IllegalStateException("no connection");

        s.getOutputStream().write(new byte[count]);

    }

    public void close() throws IOException {

        if (s != null)

            s.close();

        ss.close();

    }

}