diff -r 89c329efa980 -r e48454f237ca hgcacheproxymodel/inc/hgbuffermanager.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hgcacheproxymodel/inc/hgbuffermanager.h	Mon May 03 13:32:54 2010 +0300
@@ -0,0 +1,60 @@
+/*
+* Copyright (c) 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:
+*
+*  Version     : %version: 1 %
+*/
+#ifndef HGBUFFERMANAGER_H_
+#define HGBUFFERMANAGER_H_
+
+class HgBufferManagerObserver;
+
+class HgBufferManager
+{
+public:    
+    
+    HgBufferManager(
+                    HgBufferManagerObserver* aObserver,
+                    int aBufferSize,
+                    int aBufferTreshold,
+                    int aInitialPosition,
+                    int aTotalCount );
+	~HgBufferManager();
+
+	void setPosition( int aIndex );
+	void resetBuffer( int aPosition, int aTotalCount);
+	void itemCountChanged( int aIndex, bool aRemoved, int aNewTotalCount );
+	void resizeCache(int newSize, int newTreshold);
+	
+private:
+	void calculate();
+
+private:
+	HgBufferManagerObserver* mObserver; 
+    
+	int mBufferSize;
+	int mBufferTreshold;
+	int mBufferPosition;
+	int mDiff;
+	int mTotalCount;
+
+	bool mResetOrdered;
+
+	int mRequestStart;
+	int mRequestCount;
+	int mReleaseStart;
+	int mReleaseCount;
+};
+
+#endif // HGBUFFERMANAGER_H_