/*

* 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.Text;

using System.Text.RegularExpressions;

using System.Collections.Generic;

namespace DExcPlugin.Extractor

{

	internal class DExcExtractorEntry

    {

        #region Constructors

        public static DExcExtractorEntry NewMatchAndSave( Regex aExpression )

        {

            DExcExtractorEntry ret = new DExcExtractorEntry( aExpression );

            return ret;

        }

        public static DExcExtractorEntry NewMatchAndTransition( Regex aExpression, DExcExtractor.TState aNewState )

        {

            DExcExtractorEntry ret = new DExcExtractorEntry( aExpression, TType.ETypeMatchAndTransition, aNewState );

            return ret;

        }

        public static DExcExtractorEntry NewMatchSaveAndTransition( Regex aExpression, DExcExtractor.TState aNewState )

        {

            DExcExtractorEntry ret = new DExcExtractorEntry( aExpression, TType.ETypeMatchSaveAndTransition, aNewState );

            return ret;

        }

        #endregion

        #region Internal constructors

        private DExcExtractorEntry( Regex aExpression )

            : this( aExpression, TType.ETypeMatchAndSave, DExcExtractor.TState.EStateIdle )

		{

		}

        private DExcExtractorEntry( Regex aExpression, TType aType, DExcExtractor.TState aNewState )

        {

            iType = aType;

            iNewState = aNewState;

            iExpression = aExpression;

        }

        #endregion

		#region API

        public bool Offer( string aLine, long aLineNumber, DExcExtractorList aList, DExcExtractor aInterpreter )

        {

            Match m = iExpression.Match( aLine );

            //

            if ( m.Success )

            {

                if ( Type == TType.ETypeMatchAndTransition || Type == TType.ETypeMatchSaveAndTransition )

                {

                    aInterpreter.State = iNewState;

                }

                if ( Type == TType.ETypeMatchAndSave )

                {

                    aList.Add( m.Value );

                }

                else if ( Type == TType.ETypeMatchSaveAndTransition )

                {

                    // We have just transitioned state and we must add the line

                    // to the new state's list

                    if ( aInterpreter.CurrentList != null )

                    {

                        aInterpreter.CurrentList.Add( m.Value );

                    }

                }

            }

            //

            return m.Success;

		}

		#endregion

		#region Properties

        private TType Type

        {

            get { return iType; }

        }

		#endregion

        #region Internal enumerations

        private enum TType

        {

            ETypeMatchAndSave,

            ETypeMatchAndTransition,

            ETypeMatchSaveAndTransition

        }

        #endregion

        #region From System.Object

        public override string ToString()

        {

            return iExpression.ToString();

        }

        #endregion

        #region Data members

        private readonly TType iType;

        private readonly Regex iExpression;

        private readonly DExcExtractor.TState iNewState;

        #endregion

    }

}