--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/menufw/hierarchynavigator/hnmetadatamodel/inc/hnqueryresultcollector.h	Thu Dec 17 08:40:49 2009 +0200
@@ -0,0 +1,203 @@
+/*
+* Copyright (c) 2007-2008 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 C_HNQUERYCOLLECTOR_H
+#define C_HNQUERYCOLLECTOR_H
+
+#include <e32base.h>
+
+class CLiwGenericParamList;
+class CHnMdQueries;
+class CHnServiceHandler;
+class CHnMdQuery;
+
+// CLASS DECLARATION
+/**
+ * Query Results Collector - Callback Interface 
+ * 
+ * @lib hnmetadatamodel
+ * @since S60 5.0
+ * @ingroup group_hnmetadatamodel
+ */
+class MHnQueryResultCollectorNotification
+	{
+public:
+	
+	/**
+	 * Callback function called after results are collected
+	 * 
+	 * 	 
+	 * @since S60 5.0
+     * @param aResults Results collected for the query.
+	 */
+	virtual void ResultsCollectedL( CLiwGenericParamList* aResults ) = 0; 
+	};
+
+
+// CLASS DECLARATION
+/**
+ * Query Results Collector.
+ * 
+ * This class is responsible for collecting queries results.
+ * 
+ * @lib hnmetadatamodel
+ * @since S60 5.0
+ * @ingroup group_hnmetadatamodel
+ */
+NONSHARABLE_CLASS( CHnQueryResultCollector ): public CActive
+	{
+public:
+    
+    /**
+     * Two-phase constructor.
+     *
+     * @since S60 5.0
+     * @param aQueries Queries to operate on.
+     * @param aParams Parameters.
+     * @return Fully constructed object.
+     */
+	static CHnQueryResultCollector* NewL( const CHnMdQueries& aQueries ,
+	                               const CLiwGenericParamList& aParams);
+	
+	/**
+     * Two-phase constructor.
+     *
+     * @since S60 5.0
+     * @param aQueries Queries to operate on.
+     * @param aParams Parameters.
+     * @return Fully constructed object.
+     */
+	static CHnQueryResultCollector* NewLC( const CHnMdQueries& aQueries,
+                                  const CLiwGenericParamList& aParams );
+	        
+    /**
+     * Destructor.
+     */
+	~CHnQueryResultCollector();
+
+    /**
+     * Starts performing queries asynchronously.
+     *
+     * @since S60 5.0
+     * @param aNotification callback interface - ResultCollectedL method calles
+     *                      when queries results collected.
+     */
+	void StartAsynchL( MHnQueryResultCollectorNotification* aNotification );
+    
+protected:
+    // from CActive
+    /**
+     * Resets the current query results.
+     */
+    void DoCancel();
+    
+    /**
+     * Handles query result collection.
+     */
+    void RunL();    
+
+private:
+    /**
+     * Standard C++ constructor.
+     * 
+     * @param aQueries Queries for which results are to be executed.
+     * @param aParams Parameters for the queries.
+     */
+	CHnQueryResultCollector( const CHnMdQueries& aQueries,
+	                         const CLiwGenericParamList& aParams );
+	
+    /**
+     * Standard symbian 2nd phase constructor.
+     *
+     */
+	void ConstructL();
+	
+    /**
+     * Starts performing next query from a raw.
+     * 
+     */	
+	void ExecQueryAsynchL();
+	
+	/**
+     * Resets iterator and current results.
+     */
+	void ResetL();
+	
+	/**
+     * Check if there is another query waiting.
+     * 
+     * @return ETrue if there is another query waiting.
+     */
+	TBool NextQuery();
+		
+    /**
+     * Removes items.
+     * 
+     */
+	void HandleQueryResultsL();
+    
+    /**
+     * Executes query on Service Handler.
+     * 
+     * @param aQuery Query to be executed.
+     */
+    void ExecQueryL( CHnMdQuery& aQuery );
+    
+private:
+	
+	/**
+     * Queries.
+     * Not Own.
+     */
+	const CHnMdQueries& iQueries;
+	
+	/**
+     * Own.
+     */
+	CLiwGenericParamList* iResults;
+	
+	/**
+     * Not Own.
+     */
+	const CLiwGenericParamList& iParams;
+	
+	/**
+     * Own.
+     */
+	TInt iQueryIterator;
+	
+	/**
+     * Own.
+     */
+	CLiwGenericParamList* iCurrentQueryResults;
+	
+	/**
+     * Not Own.
+     */
+	MHnQueryResultCollectorNotification* iNotification;
+	
+	/**
+     * Service handler.
+     * Own.
+     */
+    CHnServiceHandler* iSh;
+	
+	};
+
+#endif // C_HNQUERYCOLLECTOR_H