// Copyright (c) 2002-2009 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:

//

#ifndef __LOGSERVCACHETYPES_H__

#define __LOGSERVCACHETYPES_H__

#include <logwrap.h>

#include <logwraplimits.h>

// Classes referenced

class CLogEventType;

class TResourceReader;

class MLogServDatabaseTransactionInterface;

/**

Every element stored in the CLogServCacheTypes is of TLogServCacheTypeEntry type. 

@see CLogServCacheTypes

@see CLogEventType

@internalComponent

*/

struct TLogServCacheTypeEntry

	{

	inline TLogServCacheTypeEntry() :

		iEventTypeId(KLogNullTypeId),

		iEventType(NULL)

		{

		}

	inline TLogServCacheTypeEntry(TLogTypeId aId, CLogEventType* aEventType) :

		iEventTypeId(aId),

		iEventType(aEventType)

		{

		}

	TLogTypeId 		iEventTypeId;

	CLogEventType*	iEventType;

	};

/**

Caches the event types.

The event type is used to set the event description.

Note: the event types are kept in a database table with name "Type".

@see CLogEvent

@see CLogAddEvent 

@see TLogServCacheTypeEntry

@see CLogEventType

@see MLogServDatabaseTransactionInterface

@internalComponent

*/

class CLogServCacheTypes : public CBase

	{

public:

	static CLogServCacheTypes* NewL(MLogServDatabaseTransactionInterface& aDatabase);

	~CLogServCacheTypes();

public:

	const TLogServCacheTypeEntry&	FindById(TLogTypeId aId) const;

	const TLogServCacheTypeEntry&	FindByUid(TUid aUid) const;

	TLogTypeId	AddTypeL(const CLogEventType& aEventType);

	TInt 		ChangeType(const CLogEventType& aEventType);

	TInt 		DeleteType(TUid aUid);

	void CreateStandardTypesL(TResourceReader& aResourceSpecifiedTypes, TBool aReadOnly = EFalse);

	void InitializeL();

	void CopyStandardTypeUidsL(RArray<TUid>& aUidsCopy);

private:

	CLogServCacheTypes(MLogServDatabaseTransactionInterface& aDatabase);

	void ConstructL();

	TLogTypeId DoAddTypeL(const CLogEventType& aEventType);

	TInt DoChangeType(const CLogEventType& aEventType);

	void InitializeColNumsL(RDbRowSet& aRowSet);

	void DestroyCache();

	//

	static TInt Compare1(const TUid* aUid, const TLogServCacheTypeEntry& aRight);

	static TInt Compare2(const TLogServCacheTypeEntry& aLeft, const TLogServCacheTypeEntry& aRight);

	void __DbgTestInvariant() const;

private:

	MLogServDatabaseTransactionInterface& iDatabase;

	RArray<TLogServCacheTypeEntry> 	iTypes;

	RArray<TUid> 					iStandardTypeUids;

	TLogServCacheTypeEntry			iInvalidCacheEntry;

	//Type table - column numbers

	TInt							iIdColNo;

	TInt							iUidColNo;

	TInt							iDescriptionColNo;

	TInt							iEnabledColNo;

	};

#endif