--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/predictivesearch/PcsAlgorithm/Algorithm2/inc/CPsDataPluginInterface.h	Tue Feb 02 10:12:17 2010 +0200
@@ -0,0 +1,144 @@
+/*
+* 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_ALGORITHM_2_INTERFACE_H
+#define CPS_DATA_PLUGIN_ALGORITHM_2_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_ALGORITHM_2_INTERFACE_H
+
+//End of File
\ No newline at end of file