/*

* 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.Text;

using System.Threading;

using System.Collections;

using System.Collections.Generic;

using SymbianUtils;

using SymbianUtils.Range;

using SymbianUtils.Tracer;

using SymbolLib.Generics;

using SymbolLib.CodeSegDef;

using SymbolLib.Sources.Symbol.Symbol;

using SymbolLib.Sources.Symbol.File;

using SymbolLib.Sources.Symbol.Parser;

using SymbolLib.Sources.Symbol.Collection;

namespace SymbolLib.Sources.Symbol.Engine

{

    public class SymbolFileEngineCollection : GenericSymbolEngine

    {

        #region Delegates & Events

        public event AsyncReaderBase.Observer Observer;

        #endregion

        #region Constructorss

        internal SymbolFileEngineCollection( ITracer aTracer, SymbolFileEngine.TActivationType aActivationType, bool aAllowNonRomSymbols )

            : base( aTracer )

        {

            iActivationType = aActivationType;

            iAllowNonRomSymbols = aAllowNonRomSymbols;

        }

        #endregion

        #region API

        public static bool IsSymbolFile( string aFileName )

        {

            return SymbolFileEngine.IsSymbolFile( aFileName );

        }

        public void LoadFromFile( string aSymbolFileName, TSynchronicity aSynchronicity )

        {

            // Check if already exists

            SymbolFileEngine engine = null;

            //

            lock ( this )

            {

                engine = EngineByFileName( aSymbolFileName );

                if ( engine != null )

                {

                    iFiles.Remove( engine );

                }

            }

            engine = new SymbolFileEngine( this, iActivationType, iAllowNonRomSymbols );

            lock ( this )

            {

                iFiles.Add( engine );

            }

            engine.Observer += new AsyncReaderBase.Observer( SymbolEngine_ObserverProxy );

            engine.LoadFromFile( aSymbolFileName, aSynchronicity );

        }

        public bool Load( CodeSegDefinition aDefinition )

        {

            bool ret = false;

            //

            foreach ( SymbolFileEngine engine in iFiles )

            {

                if ( engine.Load( aDefinition ) )

                {

                    ret = true;

                    break;

                }

            }

            //

            return ret;

        }

        public bool Unload( CodeSegDefinition aDefinition )

        {

            bool ret = false;

            //

            foreach ( SymbolFileEngine engine in iFiles )

            {

                if ( engine.Unload( aDefinition ) )

                {

                    ret = true;

                    break;

                }

            }

            //

            return ret;

        }

        public void UnloadAll()

        {

            foreach ( SymbolFileEngine engine in iFiles )

            {

                engine.UnloadAll();

            }

        }

        public bool IsLoaded( CodeSegDefinition aDefinition )

        {

            bool ret = false;

            //

            foreach ( SymbolFileEngine engine in iFiles )

            {

                if ( engine.IsLoaded( aDefinition ) )

                {

                    ret = true;

                    break;

                }

            }

            //

            return ret;

        }

        public string SymbolFileName( int aIndex )

        {

            return iFiles[ aIndex ].SymbolFileName;

        }

        #endregion

        #region Properties

        public int SymbolFileCount

        {

            get { return iFiles.Count; }

        }

        public GenericSymbolEngine SymbolFileEngineAt( int aIndex )

        {

            return iFiles[ aIndex ];

        }

        public string[] BinaryFileNames

        {

            get

            {

                List<string> fileNames = new List<string>( AllSymbols.Count );

                //

                foreach ( GenericSymbolCollection collection in AllSymbols )

                {

                    fileNames.Add( collection.HostBinaryFileName );

                }

                //

                return fileNames.ToArray();

            }

        }

        public string[] SymbolFileNames

        {

            get

            {

                List<string> fileNames = new List<string>( iFiles.Count );

                //

                foreach ( SymbolFileEngine engine in iFiles )

                {

                    fileNames.Add( engine.SymbolFileName );

                }

                //

                return fileNames.ToArray();

            }

        }

        public SymbolsForBinaryCollection AllSymbols

        {

            get

            {

                SymbolsForBinaryCollection ret = new SymbolsForBinaryCollection();

                //

                foreach ( SymbolFileEngine engine in iFiles )

                {

                    ret.Add( engine.AllSymbols );

                }

                //

                return ret;

            }

        }

        #endregion

        #region From GenericSymbolEngine

        public override void Reset()

        {

            iFiles.Clear();

        }

        public override bool IsLoaded( string aFileName )

        {

            SymbolFileEngine engine = EngineByFileName( aFileName );

            return engine != null;

        }

        public override bool IsReady

        {

            get

            {

                int readyCount = 0;

                //

                foreach ( SymbolFileEngine engine in iFiles )

                {

                    if ( engine.IsReady )

                    {

                        ++readyCount;

                    }

                }

                //

                return ( readyCount == iFiles.Count );

            }

        }

        public override GenericSymbolCollection this[ int aIndex ]

        {

            get

            {

                GenericSymbolCollection ret = null;

                //

                foreach ( SymbolFileEngine engine in iFiles )

                {

                    int count = engine.NumberOfCollections;

                    if ( aIndex < count )

                    {

                        ret = engine[ aIndex ];

                        break;

                    }

                    else

                    {

                        aIndex -= count;

                    }

                }

                //

                return ret;

            }

        }

        public override AddressRange Range

        {

            get

            {

                AddressRange ret = new AddressRange();

                //

                foreach ( SymbolFileEngine engine in iFiles )

                {

                    ret.Update( engine.Range );

                }

                //

                return ret;

            }

        }

        internal override void UnloadUntagged()

        {

        }

        #endregion

        #region From IGenericSymbolCollectionStatisticsInterface

        public override int NumberOfCollections

        {

            get

            {

                int count = 0;

                //

                foreach ( SymbolFileEngine engine in iFiles )

                {

                    count += engine.NumberOfCollections;

                }

                //

                return count;

            }

        }

        #endregion

        #region Event handlers

        private void SymbolEngine_ObserverProxy( SymbianUtils.AsyncReaderBase.TEvent aEvent, SymbianUtils.AsyncReaderBase aSender )

        {

            if ( Observer != null )

            {

                Observer( aEvent, aSender );

            }

        }

        #endregion

        #region Internal methods

        private SymbolFileEngine EngineByFileName( string aFileName )

        {

            SymbolFileEngine ret = null;

            //

            foreach ( SymbolFileEngine engine in iFiles )

            {

                if ( engine.SymbolFileName.ToLower() == aFileName.ToLower() )

                {

                    ret = engine;

                    break;

                }

            }

            //

            return ret;

        }

        #endregion

        #region Data members

        private readonly SymbolFileEngine.TActivationType iActivationType;

        private readonly bool iAllowNonRomSymbols;

        private List<SymbolFileEngine> iFiles = new List<SymbolFileEngine>();

        #endregion

    }

}