/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "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:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

using System;

using System.Collections.Generic;

using System.Text;

using System.Reflection;

using SymbianUtils.BasicTypes;

using SymbianETMLib.Common.Types;

namespace SymbianETMLib.Common.Packets.Factory

{

    public static class ETMPacketFactory

    {

        public static ETMPcktBase Create( SymByte aByte )

        {

            ETMPcktBase ret = null;

            //

            if ( iPackets.Count == 0 )

            {

                CreatePackets();

            }

            //

            ret = FindPacket( aByte );

            //

            return ret;

        }

        #region Internal methods

        private static void CreatePackets()

        {

            Type pluginType = typeof( ETMPcktBase );

            Assembly assembly = Assembly.GetExecutingAssembly();

            Type[] types = assembly.GetTypes();

            foreach ( Type type in types )

            {

                if ( !type.IsAbstract && pluginType.IsAssignableFrom( type ) )

                {

                    ConstructorInfo ctor = type.GetConstructor( System.Type.EmptyTypes );

                    if ( ctor != null )

                    {

                        object instance = Activator.CreateInstance( type, null );

                        if ( instance != null )

                        {

                            iPackets.Add( (ETMPcktBase) instance );

                        }

                    }

                }

            }

            // Sort the packets into priority order

            Comparison<ETMPcktBase> comparer = delegate( ETMPcktBase aLeft, ETMPcktBase aRight )

            {

                return ( aLeft.Priority.CompareTo( aRight.Priority ) * -1 );

            };

            iPackets.Sort( comparer );

        }

        private static ETMPcktBase FindPacket( SymByte aByte )

        {

            ETMPcktBase ret = new ETMPcktUnknown();

            //

            int count = iPackets.Count;

            for ( int i = 0; i < count; i++ )

            {

                ETMPcktBase packet = iPackets[ i ];

                if ( packet.Matches( aByte ) )

                {

                    ret = packet;

                    ret.RawByte = aByte;

                    break;

                }

            }

            //

            return ret;

        }

        #endregion

        #region Data members

        private static List<ETMPcktBase> iPackets = new List<ETMPcktBase>();

        #endregion

    }

}