--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/metadataengine/server/inc/mdssqlfindoperation.h	Mon Jan 18 20:34:07 2010 +0200
@@ -0,0 +1,259 @@
+/*
+* Copyright (c) 2005-2009 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:  Manages object search from database using SQL,*
+*/
+
+#ifndef __MDSSQLFINDOPERATION_H__
+#define __MDSSQLFINDOPERATION_H__
+
+#include <e32base.h>
+
+#include "mdccommon.h"
+#include "mdssqliteconnection.h"
+
+// FORWARD DECLARATIONS
+class CMdSSqLiteConnection;
+class CMdSFindSqlClause;
+class CMdSFindSequence;
+class CMdCSerializationBuffer;
+class CDesC16Array;
+class RRowData;
+
+
+/**
+* Find operation class represents a single synchronous
+* or asynchronous find.
+*/
+class CMdSSqlFindOperation: public CBase
+    {
+    public:
+	    /** state of operation */
+	    enum TOperationState
+	    	{
+	        EStateIdle,     // not working
+	        EStateRunning,  // active state
+	        EStateStop,     // stop instructed
+	        EStateDead,     // find stopped
+	        };
+
+        /**
+        * constructs a find operation        
+        * @param aFind the master class that runs this operation        
+        * @param aSetSize maximum size of a single result set
+        */
+        static CMdSSqlFindOperation* NewL(            
+            CMdSFindSequence& aFind,            
+            TUint aSetSize
+             );
+
+        /**
+        * constructs a find operation, leaves in cleanup stack.
+        */
+        static CMdSSqlFindOperation* NewLC(            
+            CMdSFindSequence& aFind,            
+            TUint aSetSize
+             );
+
+        virtual ~CMdSSqlFindOperation();
+
+        /**
+        * from MMdSFindOperation
+        */
+        TInt ExecuteL();
+
+        /**
+        * from MMdSFindOperation
+        */
+        TInt ContinueL();
+
+        /**
+        * from MMdSFindOperation
+        */
+        TInt State();
+
+        /**
+        * from MMdSFindOperation
+        */
+        void Cancel();
+
+        /**
+        * from MMdSFindOperation
+        */
+        CMdSFindSqlClause& FindCriteria();
+
+        /**
+        * Moves ownership of the result buffer to caller
+        */
+        CMdCSerializationBuffer* Results();
+
+		void SetLimit(TUint32 aLimit);
+
+		void SetOffset(TUint32 aOffset);
+
+        /**
+         * Returns query freetext array from CMdSFindSqlClause
+         * @return freetext array
+         */
+        RPointerArray<HBufC>& QueryFreeText();
+
+    private: // private construction for friends only
+
+        /**
+        * Construction
+        */
+        CMdSSqlFindOperation(            
+            CMdSFindSequence& aFind,
+            TUint aSetSize = KMaxTUint
+             );
+
+        /** 2nd phase constructor */
+        void ConstructL();
+
+    private: // Private functions
+
+        /**
+        * iterates results from database,
+        * places them in results container
+        * @return error code, KErrNone or KSetReady
+        */
+        TInt FetchResultsL();
+
+		TInt EstimateBaseResultSize();
+
+		TInt EstimateResultRowSizeL( RRowData& aRow );
+
+        /**
+        * Gets query results from the rowbuffer, creates
+        * corresponding object structure and adds into the
+        * results container.
+        * @param aDb database connection
+        * @param aRow database row to add into container
+        * @return true, if data was added to container
+        */
+	    void AddToContainerL();
+
+        /**
+        * Special treatment for Object, which is complicated
+        * because of heavy optimization
+        * @param aRow database row to add into container
+        * @param aFreespaceOffset offset to free space in buffer
+        */
+	    TMdCOffset AddObjectToContainerL( RRowData& aRow, TMdCOffset aFreespaceOffset );
+
+        /**
+        * Marks the current database rows consumed
+        */
+        void ConsumeRows();
+        
+        /**
+        * Add data to container 
+        * @param aRow database row to add into container
+        * @param aFreespaceOffset offset to free space in buffer
+        */
+        TMdCOffset AddItemToContainerL( RRowData &aRow, TMdCOffset aFreespaceOffset );
+    
+        /**
+        * Add data to container 
+        * @param aId item ID to add into container
+        */
+        void AddIdToContainerL( TItemId aId );
+    
+        /**
+        * Creates Item for serialization
+        */
+        void CreateItemL();
+    
+        /**
+        * Creates count for serialization
+        */
+        void CreateCountL();
+    
+        /**
+        * Creates Id for serialization
+        */
+        void CreateIdL();
+                
+        /**
+        * Creates distinct properties for serialization
+        */
+        void CreateDistinctL();
+    
+    private: // Member data
+    
+        /** Find type */
+        TQueryType iQueryType;
+
+		/** Result mode */
+		TQueryResultMode iResultMode;
+
+        /**
+        * Data row in find.
+        * Note: RRowData constructor cannot leave, since it is initialized (aInStack==EFalse)
+        */
+		RRowData* iResultRow;
+
+        /**
+        * Fetched result rows. Used when result mode is items or distinct.
+        * Note: RRowData constructor cannot leave, since it is initialized (aInStack==EFalse)
+        */
+        RPointerArray<RRowData> iResultRows;
+
+        /**
+        * Fetched result IDs. Used when result mode is IDs.
+        */
+        RArray<TItemId> iResultIds;
+
+        /**
+        * Fetched result count. Used when result mode is count.
+        */
+        TUint32 iResultCount;
+
+        /** container for result objects */
+        CMdCSerializationBuffer* iResults;
+
+        /** the object find back reference */
+        CMdSFindSequence& iFind;
+
+        /** the find SQL clause */
+        CMdSFindSqlClause* iFindClause;
+
+        /** asynchronous run state */
+        TOperationState iState;
+
+        /** the query ID */
+        RMdsStatement iQueryId;
+
+        /** maximum size of a single set */
+        const TUint32 iSetSize;
+
+        /** counter for results in this set */
+        TUint iSetCounter;
+
+        /** maximum size of the whole search */
+        TUint iLimit;
+
+        /** maximum size of the whole search */
+        TUint iLimitCounter;
+
+        /** offset from beginning of the sequence */
+        TUint iOffset;
+
+        /** used memory from set buffer */
+        TInt iMemoryLimit;
+        
+        /** harvesting prioritization URI count */
+        TInt iHarvestingPrioritizationCount;
+    };
+
+#endif // __MDSSQLFINDOPERATION_H__