/*

* 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.IO;

using System.Collections;

using System.Collections.Generic;

using System.Text;

using SymbianUtils;

using CrashItemLib.PluginAPI;

using CrashItemLib.Crash.Source;

using CrashItemLib.Crash.Container;

namespace CrashItemLib.Engine.Sources.Types

{

    internal sealed class CIEngineSourceReaderNative : CIEngineSourceReader

    {

        #region Constructors

        public CIEngineSourceReaderNative( CIEngineSource aSource, CFFSource aPluginSource )

            : base( aSource )

        {

            iPluginSource = aPluginSource;

        }

        #endregion

        #region From CIEngineSourceReader

        public override CIEngineSource.TState Read()

        {

            CIEngineSource.TState ret = CIEngineSource.TState.EStateReadyCorrupt;

            CFFReader reader = iPluginSource.Reader;

            //

            try

            {

                reader.Observer += new CFFReader.ReaderObserver( CFFReader_Observer );

                reader.ExceptionHandler += new CFFReader.ReaderExceptionHandler( CFFReader_ExceptionHandler );

                // Perform synchronous read

                reader.OnNativeReadInit();

                // Decide final state

                CFFReader.TState readerState = reader.State;

                switch ( readerState )

                {

                default:

                case CFFReader.TState.EStateProcessing:

                case CFFReader.TState.EStateUninitialised:

                    SymbianUtils.SymDebug.SymDebugger.Assert( false );

                    break;

                case CFFReader.TState.EStateCorrupt:

                    ret = CIEngineSource.TState.EStateReadyCorrupt;

                    break;

                case CFFReader.TState.EStateReady:

                    if ( base.CrashItemCount > 0 )

                    {

                        ret = CIEngineSource.TState.EStateReady;

                    }

                    else

                    {

                        ret = CIEngineSource.TState.EStateReadyNoItems;

                    }

                    break;

                }

            }

            finally

            {

                reader.Observer -= new CFFReader.ReaderObserver( CFFReader_Observer );

                reader.ExceptionHandler -= new CFFReader.ReaderExceptionHandler( CFFReader_ExceptionHandler );

            }

            //

            return ret;

        }

        public override CFFSource.TReaderOperationType OpType

        {

            get { return CFFSource.TReaderOperationType.EReaderOpTypeNative; }

        }

        #endregion

        #region Properties

        #endregion

        #region Event Handlers

        private void CFFReader_Observer( CFFReader.TEvent aEvent, CFFReader aReader, object aContext )

        {

            base.Trace( "[CIEngineSourceNative] CFFReader_Observer() - START - aEvent: " + aEvent + ", file: " + base.Source.FileName );

            // This method is called for both native and trace based events

            if ( aEvent == CFFReader.TEvent.EReadingContainerCreated )

            {

                CIContainer container = aContext as CIContainer;

                if ( container != null )

                {

                    base.SaveCrash( container );

                }

            }

            else if ( aEvent == CFFReader.TEvent.EReadingProgress )

            {

                int progress = ( aContext != null && aContext is int ) ? (int) aContext : 0;

                base.Source.OnSourceReadingProgress( progress );

            }

            base.Trace( "[CIEngineSourceNative] CFFReader_Observer() - END - aEvent: " + aEvent + ", file: " + base.Source.FileName );

        }

        private void CFFReader_ExceptionHandler( Exception aException, CFFReader aReader )

        {

            base.AddException( aException );

        }

        #endregion

        #region Internal methods

        #endregion

        #region Data members

        private readonly CFFSource iPluginSource;

        #endregion

    }

}