diff -r 666f914201fb -r 2fe1408b6811 epoc32/include/mw/lbttriggerfilterbase.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/epoc32/include/mw/lbttriggerfilterbase.h	Tue Mar 16 16:12:26 2010 +0000
@@ -0,0 +1,123 @@
+/*
+* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members
+* which accompanies this distribution, and is available
+* at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  Abstract base class for filter when listing triggers.
+*
+*/
+
+
+#ifndef LBTTRIGGERFILTERBASE_H
+#define LBTTRIGGERFILTERBASE_H
+
+#include <e32base.h>
+#include <s32strm.h>
+
+/**
+ * Abstract base class for filter when listing triggers from 
+ * Location Triggering Server.
+ *
+ * @lib lbt.lib
+ * @since S60 5.1
+ */
+class CLbtTriggerFilterBase : public CBase
+    {
+public:
+    /**
+     * Specifies the type of the filter
+     */
+    enum TFilterType
+        {
+        /**
+         * Filter based on the trigger entry's attribute value.
+         */
+        EFilterByAttribute = 1,
+        /**
+         * Filter based on the geographical area.
+         */
+        EFilterByArea = 2,
+        /**
+         * Composite filter.
+         */
+        EFilterComposite = 3
+        };
+
+    /**
+     * Returns the type of filter.
+     *
+     * @return The type of the filter.
+     */
+    virtual TFilterType Type() const = 0;
+
+    /**
+     * Destructor.
+     */
+    IMPORT_C virtual ~CLbtTriggerFilterBase();
+    
+    
+    /**
+     * Internalizes the trigger condition object's details and attributes 
+     * from stream.
+     *
+     * The presence of this function means that the standard templated 
+     * operator>>() ( defined in s32strm.h ) is available to internalize objects 
+     * of this class.
+     *
+     * @param[in] aStream Stream from which the object should be internalized.
+     */
+    IMPORT_C void InternalizeL( RReadStream& aStream );
+    
+    /**
+     * Externalizes the trigger condition object's details and attributes
+     * to stream.
+     *
+     * The presence of this function means that the standard templated 
+     * operator<<() ( defined in s32strm.h ) is available to externalize objects 
+     * of this class.
+     *
+     * @param[in] aStream Stream to which the object should be externalized.
+     */
+    IMPORT_C void ExternalizeL( RWriteStream& aStream ) const;
+    
+
+protected:    
+    /**
+     * Constructor.
+     */
+    CLbtTriggerFilterBase();
+    
+    /**
+     * Internalize method that subclass must implement.
+     * @param[in] aStream Stream from which the object should be internalized.
+     */
+    virtual void DoInternalizeL( RReadStream& aStream ) = 0;
+    
+    /**
+     * Externalize method that subclass must implement.
+     * @param[in] aStream Stream to which the object should be externalized.
+     */
+    virtual void DoExternalizeL( RWriteStream& aStream ) const = 0;
+    
+private:
+    /**
+     * By default, prohibit copy constructor
+     */
+    CLbtTriggerFilterBase( const CLbtTriggerFilterBase& );
+    
+    /**
+     * Prohibit assigment operator
+     */
+    CLbtTriggerFilterBase& operator= ( const CLbtTriggerFilterBase& );
+
+    };
+
+#endif // LBTTRIGGERFILTERBASE_H