--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mtpfws/mtpfw/inc/cmtphandleallocator.h	Tue Feb 02 01:11:40 2010 +0200
@@ -0,0 +1,141 @@
+// Copyright (c) 2006-2009 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:
+//
+
+/**
+ @file
+ @internalTechnology
+*/
+ 
+#ifndef CMTPHANDLEALLOCATOR_H
+#define CMTPHANDLEALLOCATOR_H
+
+#include <e32base.h>
+
+class CMTPObjectStore;
+/** 
+Defines the handle allocator which centralize the allocation of object handles
+
+@internalTechnology
+ 
+*/
+class CMTPHandleAllocator : public CBase
+	{
+public:
+	static CMTPHandleAllocator* NewL( CMTPObjectStore& aObjectStore );
+	~CMTPHandleAllocator();
+
+	TUint32 NextIdL(TUint aDataProviderId);
+	void SetIdL( TUint32 aHandleID, TInt64 aPOUID );
+	TInt64 NextPOUIDL();
+	
+   TBool AppendHandleBlockL( TUint aDataProviderId, TUint aNextID, TInt aSpace );
+	   
+private:
+	CMTPHandleAllocator( CMTPObjectStore& aObjectStore );	
+	void ConstructL();
+    void ExtendArrayL(TUint aDataProviderId);
+
+	TUint32 NextIDFromPoolL( TUint aDataProviderId );
+	
+    /*
+     * Defines the HandleID cache of one data provider. The HandleIDs have been allocated, but now
+     * they are available because the corresponding Object have been deleted or ... 
+     *  
+     * When the HandleID of one data provider is over flow, we have to search the DB to get the available
+     * HandleIDs that are not registed in DB.
+     * 
+     */
+    class CDPHandleCache : public CBase
+        {
+    public:
+        
+        class THandleBlock
+            {
+            public:
+                THandleBlock( TUint aNextID, TInt aSpace );
+            public:
+                TUint    iNextID;
+                TInt     iSpace;
+            };
+        
+    public:
+        static TInt HanldeCacheOrderFromAscending( const CDPHandleCache& aL, const CDPHandleCache& aR);
+        static TInt HanldeCacheOrderFromKeyAscending( const TUint* aL, const CDPHandleCache& aR);
+        
+    public:
+        static CDPHandleCache* NewLC( TUint aDataProviderId );
+        
+        ~CDPHandleCache();
+        
+        TUint32 NextHandleID();
+        void AppendL( const THandleBlock& aBlock );
+        
+        inline TUint DPID() const
+            {
+            return iDPID;
+            }
+        
+        inline TBool HasCache() const
+            {
+            return (iBlocks.Count() != 0);
+            }
+        
+        inline TInt  BlocksCount() const
+            {
+            return iBlocks.Count();
+            }
+        
+        static inline TInt MaxNumOfBlocks()
+            {
+            return iNumOfBlocks;
+            }
+        
+    private:
+        CDPHandleCache(TUint aDataProviderId);
+        void ConstructL();
+        
+    private:
+        /*
+         * The number of blocks 
+         */
+        static const TInt           iNumOfBlocks = 10;
+        
+        /*
+         * Data Provider ID
+         */
+        TUint                       iDPID;
+        
+        /*
+         * HandleID Blocks
+         */
+        RArray<THandleBlock>        iBlocks;
+        };
+    
+private:
+    CMTPObjectStore&                iObjectStore;
+    
+	RArray<TUint>					iNextIds;	
+
+	TInt64							iNextPOUID;
+	
+	//For ObjectID overflow
+	RPointerArray<CDPHandleCache>   iNextIDPool;
+	};
+#endif //CMTPHANDLEALLOCATOR_H	
+
+
+
+
+