/*

* Copyright (c) 2010 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 CMDNSCACHEMAP_H_

#define CMDNSCACHEMAP_H_

#include <e32hashtab.h>

#include "cserviceinfo.h"

class CMDNSCacheMap : public CBase

	{

	public:

	static CMDNSCacheMap* NewL(TUint aMaxCacheEntries);

	static CMDNSCacheMap* NewLC(TUint aMaxCacheEntries);

	void UpdateL(const TDesC8& aName, CServiceInfo* aEntry);

	CServiceInfo* Find(const TDesC8& aServiceInstanceName);

	void FindEntries(const TDesC8& aName,RPointerArray <const CServiceInfo> & aEntries);

	/*?? Do I require this method??*/void AuthoritativeRecordsL(RPointerArray <const CServiceInfo> & aEntries);

	TInt DeleteL(const TDesC8& aServiceInstanceName);

	void DeleteAllEntries();

	TUint32 NumberOfEntries();

	void DumpCacheL();	

	//Used to trace the entire Cache, return number of cache activities

	CServiceInfo* NextStaleEntry(TBool aActiveCacheMgmtEnabled,TBool aIteratorReset);

	~CMDNSCacheMap();

	private:

	/*What to do if the number of entries in Hash Table exceed 200??

	 * Delete a  entries, based on Least Recently Used

	 * Need to keep track of unused entries/ least recently used

	 * in the cache ; to delete them and make room for new entries*/		

	//Algorithm to keep track of the Least Recently Used Records

	TBool DeleteLeastRecentlyUsed();

	void ConstructL();	

	CMDNSCacheMap(TUint aMaxCacheEntries);

	private:

	RHashMap<TPtrC8,CServiceInfo*> iCacheEntries;

	THashMapIter<TPtrC8,CServiceInfo*> iterate;

	TUint iMaxCacheEntries;

	/**

    FLOGGER debug trace member variable.

	 */

	__FLOG_DECLARATION_MEMBER;  

	};

#endif /*CMDNSCACHEMAP_H_*/