--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/predictivesearch/PcsAlgorithm/Algorithm1/inc/CPsDataPluginInterface.h	Tue Feb 02 10:12:17 2010 +0200
@@ -0,0 +1,148 @@
+/*
+* Copyright (c) 2007 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:  
+*
+*/
+
+#ifndef CPS_DATA_PLUGIN_INTERFACE_H
+#define CPS_DATA_PLUGIN_INTERFACE_H
+
+// INCLUDE FILES
+#include <coemain.h>
+
+#include "CPcsDefs.h"
+#include "CPsData.h"
+#include "mdatastoreobserver.h"
+#include "mstorelistobserver.h"
+
+// FORWARD DECLARATION	
+class CPsDataPlugin;
+
+/**
+* Class is used to instantiate the required plugins when the search has been
+* asked. Acts as interface to all Plugins.
+*/
+
+class CPsDataPluginInterface: public CBase 
+{
+	public:
+		
+		/** 
+		* Symbian OS 2 phased constructor.
+		* @param aObserverForDataStore  An observer instance for data store
+		* @param aStoreListObserver     A store list observer instance
+		* @return	A pointer to the created instance of CPsDataPluginInterface.
+		*/
+		static CPsDataPluginInterface* NewL(MDataStoreObserver* aObserverForDataStore,
+											MStoreListObserver* aStoreListObserver);
+
+		/** 
+		* Symbian OS 2 phased constructor.
+		* @param aObserverForDataStore  An observer instance for data store
+		* @param aStoreListObserver     A store list observer instance
+		* @return	A pointer to the created instance of CPsDataPluginInterface.
+		*/
+		static CPsDataPluginInterface* NewLC(MDataStoreObserver* aObserverForDataStore,
+											MStoreListObserver* aStoreListObserver);
+
+		/**
+		 * Destructor.
+		 */      
+		virtual ~CPsDataPluginInterface();		
+
+		/**
+		* Instantiates the required data store plug-ins known by the ecom framework.	
+		*/
+		void InstantiateAllPlugInsL();
+
+		/**
+		* Unloads all plugins
+		* This should internally call  REComSession::DestroyedImplementation( iDtor_ID_Key )
+		* and then REComSession::FinalClose()
+		*/
+		void UnloadPlugIns(); 
+			
+		/**
+		* Lists all implementations which satisfy this ecom interface
+		*
+		* @param aImplInfoArray On return, contains the list of available implementations
+		* 
+		*/   
+		 inline void ListAllImplementationsL( RImplInfoPtrArray& aImplInfoArray )
+		 {
+		     REComSession::ListImplementationsL( KPsDataStoreInterfaceUid, aImplInfoArray );
+		 }
+
+         /**
+         * Requests the DataStore for data 
+         */
+		 void  RequestForDataL(TDesC& aDataStore);                              
+                                     
+ 
+         /**
+         * Retrieve all the supported URIs from data adapters
+         */
+         void GetAllSupportedDataStoresL(RPointerArray<TDesC>& aDataStores);
+         
+         
+         /**
+         * Retrieve the supported data fields from adapters
+         */
+         void GetSupportedDataFieldsL(TDesC& aUri, RArray<TInt>& aDataFields);
+
+ 
+    private: 
+      	
+	    /** 
+	     * Performs the first phase of two phase construction.
+	     */
+	     CPsDataPluginInterface();  
+    	
+ 		/** 
+		* Symbian OS 2 phased constructor.
+		*/
+       	void ConstructL(MDataStoreObserver* aObserverForDataStore,
+						MStoreListObserver* aStoreListObserver);
+		
+        /**
+		* Instantiates a data store plug-in, knowing the implementation uid.
+		* @param aImpUid imp uID
+		*/
+	    CPsDataPlugin* InstantiatePlugInFromImpUidL( const TUid& aImpUid, 
+	    											 MDataStoreObserver* aObserverForDataStore,
+													 MStoreListObserver* aStoreListObserver );
+	    
+	  
+	private: 
+	  
+		TUid iDtor_ID_Key;
+
+		// List of plugins that this interface will interact with
+		RPointerArray<CPsDataPlugin>  iPsDataPluginInstances; 
+		
+		/**
+	    *  An observer instance used to
+	    *  send the data from adapters to data cache
+	    */
+		MDataStoreObserver* iObserverForDataStore;
+		
+		/**
+	    * An observer instance used to send the datastore to the adapter
+	    */
+		MStoreListObserver* iStoreListObserver;
+};
+
+#endif // CPS_DATA_PLUGIN_INTERFACE_H
+
+//End of File