/*

* 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.IO;

using System.Text;

using SymbianUtils.BasicTypes;

using SymbianETMLib.Common.Types;

using SymbianETMLib.Common.Exception;

namespace SymbianETMLib.Common.Buffer

{

    public abstract class ETBufferBase

    {

        #region Constructors

        protected ETBufferBase()

        {

        }

        protected ETBufferBase( string aFileName )

        {

            byte[] buffer = File.ReadAllBytes( aFileName );

            AddRange( buffer );

        }

        #endregion

        #region API

        public void Clear()

        {

            iData.Clear();

        }

        public void AddRange( IEnumerable<byte> aBytes )

        {

            iData.AddRange( aBytes );

        }

        public void PushBack( SymByte aByte )

        {

            iData.Insert( 0, aByte.Value );

        }

        public SymByte Dequeue()

        {

            if ( IsEmpty )

            {

                throw new ETMException( "ERROR - buffer is empty" );

            }

            //

            byte head = iData[ 0 ];

            iData.RemoveAt( 0 );

            return new SymByte( head );

        }

        #endregion

        #region Properties

        public bool IsEmpty

        {

            get { return iData.Count == 0; }

        }

        public int Count

        {

            get { return iData.Count; }

        }

        #endregion

        #region Internal methods

        protected List<byte> Data

        {

            get { return iData; }

            set { iData = value; }

        }

        #endregion

        #region Data members

        List<byte> iData = new List<byte>();

        #endregion

    }

}