diff -r 000000000000 -r c53acadfccc6 metadataengine/client/inc/mdequeryimpl.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/metadataengine/client/inc/mdequeryimpl.h	Mon Jan 18 20:34:07 2010 +0200
@@ -0,0 +1,271 @@
+/*
+* 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:  Implementation of object, relation and event query
+*
+*/
+
+
+#ifndef __MDEQUERYIMPL_H__
+#define __MDEQUERYIMPL_H__
+
+#include "mdeobjectquery.h"
+#include "mderelationquery.h"
+#include "mdeeventquery.h"
+
+// Forward declaration
+class CMdESessionImpl;
+class CMdENamespaceDef;
+class CMdEObjectDef;
+class RMdEEngineSession;
+class CMdEAsynchronousFindAO;
+
+/**
+ * Object query implementation.
+ */
+NONSHARABLE_CLASS(CMdEObjectQueryImpl) : public CMdEObjectQuery
+	{
+public:
+
+    /* Constructors and destructor. */
+	/**
+	 * Two-phased constructor.
+	 */
+	static CMdEObjectQueryImpl* NewL( CMdESessionImpl& aSessionImpl, CMdENamespaceDef& aNamespaceDef, 
+			CMdEObjectDef& aObjectDef, RPointerArray<CMdEObjectDef>* aObjectDefs,
+			RMdEEngineSession& aSession );
+	
+	static CMdEObjectQueryImpl* NewLC( CMdESessionImpl& aSessionImpl, CMdENamespaceDef& aNamespaceDef, 
+			CMdEObjectDef& aObjectDef, RPointerArray<CMdEObjectDef>* aObjectDefs,
+			RMdEEngineSession& aSession );
+
+	/**
+	 * Destructor.
+	 */
+	virtual ~CMdEObjectQueryImpl();
+
+
+    /* Methods. */
+
+    /**
+     * As in CMdEQuery.
+	 */
+    void DoFindL( TUint aMaxCount, TUint aNotifyCount );
+
+    /**
+     * Notifies results
+	 */
+    void DoNotifyResultsL( RPointerArray<CMdEInstanceItem>& aResultList );
+
+    /**
+     * Notifies results of id query
+	 */
+    void DoNotifyResultsL( RArray<TItemId>& aResultIdList );
+
+    /**
+     * Notifies result of distinct values query
+     */
+    void DoNotifyResultsL( CDesCArray& aResults );
+
+    /**
+     * Notifies result of count query
+	 */
+    void DoNotifyResults( TInt aResultCount );
+    
+    /**
+     * Notifies query completed
+	 */
+    void DoNotifyCompleted( TInt aError );
+
+protected:
+    
+    /**
+     * As in CMdEQuery.
+     */
+    void DoCancel();
+    
+private:
+	/**
+	 * Constructor. Note that new queries should be created using the factory
+	 * @param aSessionImpl the session
+	 */
+	CMdEObjectQueryImpl( CMdESessionImpl& aSessionImpl, CMdENamespaceDef& aNamespaceDef, 
+			CMdEObjectDef& aObjectDef, RPointerArray<CMdEObjectDef>* aObjectDefs );
+	
+	/**
+	 * Second-phase constructor.
+	 * @param aSession reference to the engine session
+	 */
+	void ConstructL( CMdESessionImpl& aSessionImpl, RMdEEngineSession& aSession );
+
+    
+private:
+
+	/** Asynchronous find support. */
+	CMdEAsynchronousFindAO* iAsyncFind;
+    };
+
+/**
+ * Relation query stub implementation.
+ */
+class CMdERelationQueryImpl
+    : public CMdERelationQuery
+	{
+public:
+
+    /* Constructors and destructor. */
+	/**
+	 * Two-phased constructor.
+	 */
+	static CMdERelationQueryImpl* NewL( CMdESessionImpl& aSessionImpl,
+			CMdENamespaceDef& aNamespaceDef, RMdEEngineSession& aSession );
+	
+	static CMdERelationQueryImpl* NewLC( CMdESessionImpl& aSessionImpl,
+			CMdENamespaceDef& aNamespaceDef, RMdEEngineSession& aSession );
+	
+	/**
+	 * Destructor.
+	 */
+	virtual ~CMdERelationQueryImpl();
+
+
+    /* Methods from CMdERelationQuery. */
+
+    /**
+     * As in CMdEQuery.
+	 */
+    void DoFindL( TUint aMaxCount, TUint aNotifyCount );
+
+    /**
+     * Notifies results
+	 */
+    void DoNotifyResultsL( RPointerArray<CMdEInstanceItem>& aResultList );
+
+    /**
+     * Notifies results of id query
+	 */
+    void DoNotifyResultsL( RArray<TItemId>& aResultIdList );
+
+    /**
+     * Notifies result of count query
+	 */
+    void DoNotifyResults( TUint32 aResultCount );
+
+    /**
+     * Notifies query completed
+	 */
+    void DoNotifyCompleted( TInt aError );
+
+protected:
+ 
+    /**
+     * As in CMdEQuery.
+     */
+    void DoCancel();
+    
+private:
+	/**
+	 * Constructs a new relation query in the specified session.
+	 * @param aSessionImpl the session
+	 */
+	CMdERelationQueryImpl( CMdESessionImpl& aSessionImpl, CMdENamespaceDef& aNamespaceDef );
+	
+	/**
+	 * Second-phase constructor.
+	 * @param aSession reference to the engine session
+	 */
+	void ConstructL( CMdESessionImpl& aSessionImpl, RMdEEngineSession& aSession );
+
+    
+private:
+
+	/** Asynchronous find support. */
+	CMdEAsynchronousFindAO* iAsyncFind;
+    };
+
+/**
+ * Event query implementation.
+ */
+class CMdEEventQueryImpl: public CMdEEventQuery
+	{
+public:
+
+    /* Constructors and destructor. */
+
+	static CMdEEventQueryImpl* NewL( CMdESessionImpl& aSessionImpl,
+		CMdENamespaceDef& aNamespaceDef, RMdEEngineSession& aSession );
+
+	static CMdEEventQueryImpl* NewLC( CMdESessionImpl& aSessionImpl,
+		CMdENamespaceDef& aNamespaceDef, RMdEEngineSession& aSession );
+
+	/**
+	 * Destructor.
+	 */
+	virtual ~CMdEEventQueryImpl();
+
+
+    /* Methods from CMdEEventQuery. */
+
+    /**
+     * As in CMdEQuery.
+	 */
+    void DoFindL( TUint aMaxCount, TUint aNotifyCount );
+
+    /**
+     * Notifies results
+	 */
+    void DoNotifyResultsL( RPointerArray<CMdEInstanceItem>& aResultList );
+
+    /**
+     * Notifies results of id query
+	 */
+    void DoNotifyResultsL( RArray<TItemId>& aResultIdList );
+
+    /**
+     * Notifies result of count query
+	 */
+    void DoNotifyResults( TUint32 aResultCount );
+
+    /**
+     * Notifies query completed
+	 */
+    void DoNotifyCompleted( TInt aError );
+
+protected:
+    
+    /**
+     * As in CMdEQuery.
+     */
+    void DoCancel();
+    
+private:
+	/**
+	 * Constructs a new event query in the specified session.
+	 * @param aSessionImpl the session
+	 */
+	CMdEEventQueryImpl( CMdESessionImpl& aSessionImpl, CMdENamespaceDef& aNamespaceDef );
+	
+	/**
+	 * Second-phase constructor. 
+	 * @param aSession reference to the engine session
+	 */
+	void ConstructL( CMdESessionImpl& aSessionImpl, RMdEEngineSession& aSession );
+
+    
+private:
+
+	/** Asynchronous find support. */
+	CMdEAsynchronousFindAO* iAsyncFind;
+	};
+
+#endif  // __MDEQUERYIMPL_H__