/*******************************************************************************

 * Copyright (c) 2009 Symbian Foundation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Symbian Foundation - initial contribution.

 * Contributors:

 * Description:

 * Overview:

 * Details:

 * Platforms/Drives/Compatibility:

 * Assumptions/Requirement/Pre-requisites:

 * Failures and causes:

 *******************************************************************************/

package org.symbian.tools.tmw.debug.internal.launch;

import java.io.IOException;

import java.net.ServerSocket;

import org.symbian.tools.tmw.debug.internal.Activator;

public abstract class PortPolicy {

    private static class NewPortEachTime extends PortPolicy {

        @Override

        protected int getPort() {

            return getOpenPort();

        }

    }

    public static final PortPolicy INSTANCE;

    static {

        INSTANCE = new NewPortEachTime();

    }

    public static synchronized int getPortNumber() {

        return INSTANCE.getPort();

    }

    public int getOpenPort() {

        try {

            final ServerSocket socket = new ServerSocket(0);

            int port = socket.getLocalPort();

            socket.close();

            return port;

        } catch (IOException e) {

            Activator.log(e);

            return 7222;

        }

    }

    protected abstract int getPort();

}