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

 * 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 ReuseSamePort extends PortPolicy {

    //		private int port = -1;

    //

    //		@Override

    //		protected int getPort() {

    //			if (port < 0) {

    //				port = getOpenPort();

    //			}

    //			return port;

    //		}

    //	}

	private static class NewPortEachTime extends PortPolicy {

		@Override

		protected int getPort() {

			return getOpenPort();

		}

	}

	public static final PortPolicy INSTANCE;

	static {

        //		if (CoreUtil.isMac()) {

			INSTANCE = new NewPortEachTime();

        //		} else {

        //			INSTANCE = new ReuseSamePort();

        //		}

	}

	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();

}