--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crashanalysercmd/PerfToolsSharedLibraries/Engine/SymbianUtils/TextUtilities/Readers/Filters/AsyncTextReaderFilterCollection.cs	Thu Feb 11 15:50:58 2010 +0200
@@ -0,0 +1,152 @@
+/*
+* 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;
+
+namespace SymbianUtils
+{
+	public class AsyncTextReaderFilterCollection : IEnumerable
+	{
+		#region Enumerations
+		public enum TCombinationType
+		{
+			ECombinationTypeUndefined = 0,
+			ECombinationTypeOR,
+			ECombinationTypeAND,
+			ECombinationTypeNOT
+		}
+		#endregion
+
+		#region Constructors
+		public AsyncTextReaderFilterCollection()
+		{
+		}
+		#endregion
+
+		#region API - Filter processing
+		public bool ProcessFilters( ref string aLine )
+		{
+			bool propagateLine = false;
+			//
+			if	( aLine.Length > 0 ) 
+			{
+				int matchCount = 0;
+				int filterCount = Count;
+
+				// First phase: check for filter matches
+				for ( int i = 0; i < filterCount; i++ )
+				{
+					AsyncTextReaderFilter filter = this[ i ];
+					//
+					bool matchedFilter = filter.Matches( aLine );
+					if ( matchedFilter )
+					{
+						++matchCount;
+					}
+				}
+
+				// Second phase: check for overall match against combined
+				// criteria.
+				propagateLine = ( filterCount == 0 ); // Default to true when no filters
+				switch ( CombinationType )
+				{
+					case TCombinationType.ECombinationTypeOR:
+						propagateLine = ( matchCount > 0 );
+						break;
+					case TCombinationType.ECombinationTypeAND:
+						propagateLine = ( matchCount == filterCount );
+						break;
+					case TCombinationType.ECombinationTypeNOT:
+						propagateLine = ( matchCount == 0 );
+						break;
+					default:
+					case TCombinationType.ECombinationTypeUndefined:
+						break;
+				}
+
+				// Third phase: process filter
+				if	( propagateLine )
+				{
+					for ( int i = 0; i < filterCount; i++ )
+					{
+						AsyncTextReaderFilter filter = this[ i ];
+						filter.Process( ref aLine );
+					}
+				}
+			}
+
+			return propagateLine;
+		}
+		#endregion
+
+		#region API - Filter management
+		public void Add( AsyncTextReaderFilter aFilter )
+		{
+			iFilters.Add( aFilter );
+		}
+
+		public void RemoveAt( int aIndex )
+		{
+			iFilters.RemoveAt( aIndex );
+		}
+
+		public void Remove( AsyncTextReaderFilter aFilter )
+		{
+			iFilters.Remove( aFilter );
+		}
+
+		public void Clear()
+		{
+			iFilters.Clear();
+		}
+
+		#endregion
+
+		#region Properties
+		public int Count
+		{
+			get { return iFilters.Count; }
+		}
+
+		public AsyncTextReaderFilter this[ int aIndex ]
+		{
+			get { return (AsyncTextReaderFilter) iFilters[ aIndex ]; }
+		}
+
+		public TCombinationType CombinationType
+		{
+			get { return iCombinationType; }
+			set { iCombinationType = value; }
+		}
+		#endregion
+
+		#region IEnumerable Members
+		public IEnumerator GetEnumerator()
+		{
+			return new AsyncTextReaderFilterCollectionEnumerator( this );
+		}
+		#endregion
+
+		#region Data members
+		private TCombinationType iCombinationType = TCombinationType.ECombinationTypeUndefined;
+		private ArrayList iFilters = new ArrayList();
+		#endregion
+	}
+}