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/*
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* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: This class is responsible for managing all of music collection
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* databases.
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*
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*/
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#ifndef MPXDBMANAGER_H
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#define MPXDBMANAGER_H
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// INCLUDES
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#include <e32base.h>
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#include <f32file.h>
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#include <sqldb.h>
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#include <badesca.h>
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// FORWARD DECLARATIONS
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class MMPXTable;
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class RSqlStatement;
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// CONSTANTS
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const TInt KDbManagerAllDrives = 0;
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// CLASS DECLARATION
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/**
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* Generic class responsible for managing databases on multiple drives.
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*
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* @lib MPXDbPlugin.lib
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*/
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class CMPXDbManager :
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public CBase
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{
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protected: // Constructors
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/**
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* C++ default constructor
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* @param aFs file server session
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*/
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IMPORT_C CMPXDbManager(RFs& aFs);
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/**
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* The second phase constructor to safely construct things
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* that can leave
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* @param aDatabaseFile database filename
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*/
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IMPORT_C void ConstructL(const TFileName& aDatabaseFile);
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public:
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/**
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* Destructor
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*/
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IMPORT_C virtual ~CMPXDbManager();
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public: // New methods
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/**
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* Checks if all databases have been initialized.
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* @return ETrue if initialized, EFalse otherwise
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*/
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IMPORT_C TBool IsInitialized();
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/**
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* Begins a transaction on all databases.
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*/
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IMPORT_C void BeginL();
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/**
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* Commits a transaction on all databases.
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*/
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IMPORT_C void CommitL();
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/**
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* Rolls back a transaction on all databases.
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*/
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IMPORT_C void RollbackL();
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/**
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* Checks if the database is currently in a transaction
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*
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* @return ETrue if database is currently in a transaction, EFalse otherwise
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*/
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IMPORT_C TBool InTransaction();
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/**
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* Tries to create and open the databases on all specified drives.
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* If a drive is not valid (like an MC not plugged in) it will be skipped.
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* @param aDrives array of drives to create and open databases on.
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*/
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IMPORT_C void InitDatabasesL(RArray<TInt> aDrives);
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/**
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* Opens a specified database.
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* @param aDrive identifies the drive index of the database to open
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*/
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IMPORT_C void OpenDatabaseL(TInt aDrive);
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/**
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* Closes a specified database.
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* @param aDrive identifies the drive index of the database to close
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*/
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IMPORT_C void CloseDatabaseL(TInt aDrive);
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/**
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* Closes all open databases.
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*/
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IMPORT_C void CloseAllDatabases();
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/**
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* Opens all open databases.
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*/
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IMPORT_C void OpenAllDatabasesL();
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/**
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* Checks if the database on a specified drive is open.
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* @param aDrive identifies the drive index of the database to check
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* @return ETrue if the database is open, EFalse otherwise
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*/
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IMPORT_C TBool IsOpen(TInt aDrive) const;
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/**
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* Returns the number of currently open databases.
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* @return Number of databases
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*/
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IMPORT_C TInt DatabaseCount() const;
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/**
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* Returns the drive corresponding to a give index.
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* @param aIndex identifies the index in the list of drives the database uses
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* @return Drive index the database uses.
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*/
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IMPORT_C TInt DbDrive(TInt aIndex) const;
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/**
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* Recreate a specified database.
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* @param aDrive identifies the drive index ro recreate the database
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*/
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IMPORT_C void RecreateDatabaseL(TInt aDrive);
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/**
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* Recreate all databases.
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*/
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IMPORT_C void RecreateAllDatabasesL();
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/**
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* Return current DB version
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* @return the version of db structure
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*/
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IMPORT_C TVersion Version() const;
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/**
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* Return current DB version
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* @return the version of db structure
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*/
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IMPORT_C void RegisterTableL(MMPXTable& aTable);
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/**
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* Executes a select query with variable number of parameters on all
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* available drives.
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* @param aFmt query format string
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* @return resulted result set
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*/
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IMPORT_C RSqlStatement ExecuteSelectQueryL(TRefByValue<const TDesC> aFmt, ...);
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/**
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* Executes a select query with variable number of parameters
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* against a specified drive
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* @param aDrive to execute query on
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* @param aFmt query format string
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* @return resulted result set
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*/
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IMPORT_C RSqlStatement ExecuteSelectQueryL(TInt aDrive, TRefByValue<const TDesC> aFmt,
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...);
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/**
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* Executes a select query with variable number of parameters
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* on all available drives. Two values will be bound to the statement
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* @param aStatementId unique id of a statement to bind to
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* creates a new statement if the id is not found
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* @param aFirstValue TInt Value to bind as first argument
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* @param aSecondValue TInt Value to bind as second argument
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* @param aFmt query format string
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* @return resulted result set. The ownership is not passed so the caller should
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* not destroy this as it may be reused in future calls.
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*/
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IMPORT_C RSqlStatement& ExecuteSelectQueryL( TUint aStatementId,
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TInt aFirstValue, TInt aSecondValue,
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TRefByValue<const TDesC> aFmt, ...);
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/**
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* Executes a select query with variable number of parameters
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* on all available drives. Two values will be bound to the statement
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* @param aStatementId unique id of a statement to bind to
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* creates a new statement if the id is not found
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* @param aFirstValue TDesC Value to bind as first argument
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* @param aSecondValue TInt Value to bind as second argument
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* @param aFmt query format string
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* @return resulted result set. The ownership is not passed so the caller should
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* not destroy this as it may be reused in future calls.
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*/
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IMPORT_C RSqlStatement& ExecuteSelectQueryL( TUint aStatementId,
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const TDesC& aFirstValue,
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TInt aSecondValue,
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TRefByValue<const TDesC> aFmt, ...);
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/**
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* Executes a query that does not return a record set
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* @param aDrive to execute query on
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* @param aFmt query format string
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*/
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IMPORT_C void ExecuteQueryL(TInt aDrive, TRefByValue<const TDesC> aFmt, ...);
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/**
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* Prints the contents of all the databases to the log file
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* @param aDrive to execute query on
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*/
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IMPORT_C void PrintDatabaseL();
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/**
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* Returns the file server session.
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* @return file server session
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*/
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IMPORT_C RFs& Fs();
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/**
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* Checks if the space on the specified drive(s) is above the critical level
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* @param aDrive drive ID or KDbManagerAllDrives
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* @leave KErrDiskFull if the space on the specified drive(s) is below the
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* critical level
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*/
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IMPORT_C void CheckDiskSpaceL(TInt aDrive);
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/**
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* Completely recreate all databases.
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*/
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IMPORT_C void RegenerateAllDatabasesL();
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/**
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* Checks if the spefified drive is a remove drive
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*/
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IMPORT_C TBool IsRemoteDrive(TDriveNumber aDrive);
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protected:
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/**
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* Creates a database on a specified drive.
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* @param aDrive identifies the database
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*/
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IMPORT_C void CreateDatabaseL(TInt aDrive);
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/**
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* Remove the database
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* @param aDrive identifies the database
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*/
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IMPORT_C void RemoveDatabaseL(TInt aDrive);
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/**
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* Create the all tables
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* @param aDatabase the database to add tables to
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*/
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IMPORT_C void CreateTablesL(RSqlDatabase& aDatabase);
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/**
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* Drop all tables
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* @param aDatabase the database to drop tables from
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*/
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IMPORT_C void DropTablesL(RSqlDatabase& aDatabase);
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public:
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/**
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* Executes a select query with variable number of parameters
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* against a specified drive
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* @param aDrive to execute query on
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* @param aFmt query format string
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* @return resulted result set
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*/
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IMPORT_C RSqlStatement ExecuteSelectQueryOnAllDrivesL(TInt aDrive, TRefByValue<const TDesC> aFmt,
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...);
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/**
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* Copy all databases from RAM disk back to normal drive, E, F,...
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*
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* @return none
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*/
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IMPORT_C void CopyDBsFromRamL();
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/**
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* Copy all databases to RAM disk back from normal drive, E, F,...
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*
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* @return none
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*/
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IMPORT_C void CopyDBsToRamL( TBool aIsMTPInUse = EFalse);
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/**
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* Check if RAM disk is enough to operatte. If not, DBs will be copied back to drives.
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*
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* @return TInt index to the database handler
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*/
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IMPORT_C void EnsureRamSpaceL() ;
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/**
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* Move DBs from RAMDisk to disks
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*/
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//IMPORT_C void BackupDBsL();
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private:
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/**
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* Find available RAMDISK
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* @return error code
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*/
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TInt GetRAMDiskPath();
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/**
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* Check if RAM disk is available to copy.
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*
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* @return ETrue if there is enough space, EFalse otherwise
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*/
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TBool IsRamDiskSpaceAvailable();
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/**
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* To block a diskspace so that it can gurantee for a write back from RAM disk
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*
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* @return ETrue if the dummy file is created successfully, EFalse otherwise
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*/
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TBool BlockDiskSpace( TInt aIndex, TBool aIsMTPInUse = EFalse );
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/**
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* To copy db from regular drive to RAM
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*
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* @return ETrue if succeed
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*
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* No-operation if fails
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*/
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TBool DoCopyDBToRam( TInt aIndex, TBool aIsMTPInUse );
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/**
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* To copy db back regular drive from RAM
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*
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*/
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void DoCopyDBFromRam( TInt aIndex );
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/**
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* To replace dummy file with new content
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* Writes over previous dummy file without freeing disk space
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*/
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void ReplaceFileL( const TDesC& aSrcName, const TDesC& aDstName );
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/**
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* To calculate necessary file size of the dummy file
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*
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* @return TInt64 estimated file size
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*/
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TInt64 CalculateInitalDummyDBSize( const TVolumeInfo& aVol, TInt aOrigDbSize, TBool aIsMTPInUse = EFalse);
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/**
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* Get database index by giving drive index
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*
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* @return TInt index to the database handler
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*/
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TInt GetDatabaseIndex(TInt aDrive);
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/**
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* Sum up the total size in bytes of the databases.
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*
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* @param aSize - On return, the total size of the databases.
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* @return TInt System error.
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*/
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TInt GetTotalDatabasesSize(TInt& aSize);
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/**
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* Sum up the total size in bytes of the databases on the RAM drive.
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*
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* @param aSize - On return, the total size of the databases on the RAM drive.
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* @return TInt System error.
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*/
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TInt GetTotalRamDatabasesSizeL(TInt& aSize);
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/**
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* Remove dummy file
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*
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* @return TInt index to the database handler
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*/
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void RemoveDummyFile( TInt index );
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/**
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* Check if disksapce is enough to operatte. If not, it leaves with KErrDiskFull
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*
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*/
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void EnsureDiskSpaceL(TInt aDrive) ;
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/**
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* Begin transaction, leaves on error
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*/
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void DoBeginL();
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/**
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* Commit transaction, leaves on error
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*/
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void DoCommitL();
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/**
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* Create full path and filename on a specified drive unit.
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* @param aDrive identifies the drive unit
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*/
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HBufC* CreateFullFilenameL(TDriveUnit aDrive);
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protected: // Types
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typedef struct
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{
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TInt iDrive;
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TBool iOpen;
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HBufC* iAliasname;
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#ifdef __RAMDISK_PERF_ENABLE
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TBool iUseRAMdb;
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HBufC* iOrigFullFilePath;
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HBufC* iTargetFullFilePath;
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TFileName iDummyFilePath;
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#endif //__RAMDISK_PERF_ENABLE
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} DatabaseHandle;
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protected: // Data
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HBufC* iDbFile;
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RArray<MMPXTable*> iTables;
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RSqlDatabase iDatabase;
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RArray<DatabaseHandle> iDatabaseHandles;
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private:
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/**
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* Create the all tables
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* @param aDatabase the database to add tables to
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* @param aCorrupt specifies whether the database is corrupted or not
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*/
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void CreateTablesL(RSqlDatabase& aDatabase, TBool aCorrupt);
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/**
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* Opens root database at C-drive.
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*/
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void OpenRootDatabaseL();
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/**
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* Creates a specified database.
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|
463 |
* @param aDrive identifies the drive unit of the database to create
|
|
464 |
*/
|
|
465 |
void CreateDatabaseL(TDriveUnit aDrive);
|
|
466 |
|
|
467 |
/**
|
|
468 |
* Attached a specified database.
|
|
469 |
* @param aIndex Index to iDatabaseHandles
|
|
470 |
*/
|
|
471 |
void AttachDatabaseL(TInt aIndex);
|
|
472 |
|
|
473 |
/**
|
|
474 |
* Detach a specified database.
|
|
475 |
* @param aIndex Index to iDatabaseHandles
|
|
476 |
*/
|
|
477 |
void DetachDatabaseL(TInt aIndex);
|
|
478 |
|
|
479 |
/**
|
|
480 |
* Open database
|
|
481 |
* @param aIndex Index to iDatabaseHandles
|
|
482 |
*/
|
|
483 |
void OpenDatabaseAtIndexL( TInt aIndex );
|
|
484 |
|
|
485 |
/**
|
|
486 |
* Close database
|
|
487 |
* @param aIndex Index to iDatabaseHandles
|
|
488 |
*/
|
|
489 |
void CloseDatabaseAtIndexL(TInt aIndex);
|
|
490 |
|
|
491 |
/**
|
|
492 |
* Create filename on a specified drive unit.
|
|
493 |
* @param aDrive identifies the drive unit
|
|
494 |
*/
|
|
495 |
HBufC* CreateFilenameL(TDriveUnit aDrive);
|
|
496 |
|
|
497 |
|
|
498 |
/**
|
|
499 |
* Replaces specially formatted query symbols with a specified alias.
|
|
500 |
* @param aAlias identifies the alias name to use in query
|
|
501 |
*/
|
|
502 |
void ReplaceDriveAlias(TDes& aQuery, const TDesC& aAlias);
|
|
503 |
|
|
504 |
/**
|
|
505 |
* Replaces specially formatted query symbols with a specified alias.
|
|
506 |
* @param aAlias identifies the alias name to use in query
|
|
507 |
* @param aToKen replace by aAlias
|
|
508 |
*/
|
|
509 |
void ReplaceDriveAlias(TDes& aQuery, const TDesC& aAlias, const TDesC& aToKen);
|
|
510 |
|
|
511 |
/**
|
|
512 |
* Removes specially formatted query symbols from the query
|
|
513 |
* @param aQuery identifies the query to remove specially formatted symbols
|
|
514 |
*/
|
|
515 |
void RemoveDriveAlias(TDes& aQuery);
|
|
516 |
|
|
517 |
/**
|
|
518 |
* Removes specially formatted query symbols from the query
|
|
519 |
* @param aQuery identifies the query to remove specially formatted symbols
|
|
520 |
* @param aToKen identifies need remove string
|
|
521 |
*/
|
|
522 |
void RemoveDriveAlias(TDes& aQuery, const TDesC& aToKen);
|
|
523 |
|
|
524 |
/**
|
|
525 |
* Attempts to recreate database by dropping and creating tables
|
|
526 |
* used inside RecreateDatabaseL
|
|
527 |
* @param aFilename database filename
|
|
528 |
*/
|
|
529 |
void DoRecreateDatabaseL(HBufC * aFilename);
|
|
530 |
|
|
531 |
/**
|
|
532 |
* Executes SQL statement against the database.
|
|
533 |
*
|
|
534 |
* @param aDatabase database handle
|
|
535 |
* @param aStatement sql statement buffer
|
|
536 |
* @return KErrNone if successfull, error code otherwise.
|
|
537 |
*
|
|
538 |
*/
|
|
539 |
TInt ExecuteSqlStatement(RSqlDatabase& aDatabase, const TDesC& aStatement);
|
|
540 |
|
|
541 |
/**
|
|
542 |
* Formats the query.
|
|
543 |
* @param aFmt query format
|
|
544 |
* @param aList variable parameter list
|
|
545 |
* @return formatted query, the ownership is transferred.
|
|
546 |
*/
|
|
547 |
HBufC* FormatQueryLC(TRefByValue<const TDesC> aFmt, VA_LIST aList);
|
|
548 |
|
|
549 |
/**
|
|
550 |
* Executes an SQL query on all drives
|
|
551 |
* @param aQuery query string
|
|
552 |
* @return prepared SQL statement
|
|
553 |
*/
|
|
554 |
RSqlStatement ExecuteSelectQueryOnAllDrivesL(TPtr aQuery);
|
|
555 |
|
|
556 |
/**
|
|
557 |
* Executes an SQL query on all drives
|
|
558 |
* @param aDrive drive to execute the query on
|
|
559 |
* @param aQuery query string
|
|
560 |
* @return prepared SQL statement
|
|
561 |
*/
|
|
562 |
RSqlStatement ExecuteSelectQueryOnAllDrivesL(TInt aDrive,TPtr aQuery);
|
|
563 |
|
|
564 |
/**
|
|
565 |
* Executes an SQL query on a specified drive
|
|
566 |
* @param aDrive drive to execute the query on
|
|
567 |
* @param aQuery query string
|
|
568 |
* @return prepared SQL statement
|
|
569 |
*/
|
|
570 |
RSqlStatement ExecuteSelectQueryOnDriveL(TInt aDrive, TPtr aQuery);
|
|
571 |
|
|
572 |
/**
|
|
573 |
* Prepares an sql query given the statment
|
|
574 |
* @param aStatementId unique identifier of the statement
|
|
575 |
* @param aFmt query format string
|
|
576 |
* @param aList variable parameter list
|
|
577 |
* @return reference to the SQL statement
|
|
578 |
*/
|
|
579 |
RSqlStatement& PrepareQueryL( TUint aStatementId,
|
|
580 |
TRefByValue<const TDesC> aFmt,
|
|
581 |
VA_LIST aList );
|
|
582 |
|
|
583 |
/**
|
|
584 |
* Resets all prepared queries
|
|
585 |
*/
|
|
586 |
void ResetPreparedQueries();
|
|
587 |
|
|
588 |
/**
|
|
589 |
* Create Database
|
|
590 |
*/
|
|
591 |
void DoCreateDatabaseL( TDriveUnit aDrive );
|
|
592 |
|
|
593 |
#ifdef _DEBUG
|
|
594 |
|
|
595 |
/**
|
|
596 |
* Returns the number of columns from a specified SQL statement
|
|
597 |
* @param aStatement identifies the SQL query to check
|
|
598 |
*/
|
|
599 |
TInt GetColumnCountL(RSqlStatement& aStatement);
|
|
600 |
|
|
601 |
/**
|
|
602 |
* Prints the table of results from a specified SQL query to the debug log
|
|
603 |
* @param aStatement identifies the SQL query made
|
|
604 |
*/
|
|
605 |
void PrintTableValuesL(RSqlStatement& aStatement);
|
|
606 |
|
|
607 |
/**
|
|
608 |
* Finds all the tables on the main or attached drives
|
|
609 |
* @param aAlias identifies the alias name to use if a attached drive KNullDesC if main drive
|
|
610 |
* @param aTableName identifies the array of table names on the main or attached drive
|
|
611 |
*/
|
|
612 |
void FindAllTablesL(const TDesC& aAlias, RArray<HBufC*>& aTableName);
|
|
613 |
|
|
614 |
/**
|
|
615 |
* Prints the table on the main or attached drives
|
|
616 |
* @param aAlias identifies the alias name to use if a attached drive KNullDesC if main drive
|
|
617 |
* @param aTableName identifies the table name on the main or attached drive
|
|
618 |
*/
|
|
619 |
void PrintTableL(const TDesC& aAlias, const TDesC& aTableName);
|
|
620 |
|
|
621 |
#endif
|
|
622 |
private:
|
|
623 |
|
|
624 |
/*
|
|
625 |
* Structure to hold the state of a sql statement
|
|
626 |
*/
|
|
627 |
NONSHARABLE_STRUCT( TSqlStatementState )
|
|
628 |
{
|
|
629 |
TBool iPrepared;
|
|
630 |
TUint iId;
|
|
631 |
};
|
|
632 |
|
|
633 |
private:
|
|
634 |
|
|
635 |
TBool iInitialized;
|
|
636 |
TInt iTransactionCount;
|
|
637 |
RFs& iFs;
|
|
638 |
|
|
639 |
RArray<TSqlStatementState> iPreparedStatements;
|
|
640 |
RPointerArray<RSqlStatement> iStatements;
|
|
641 |
|
|
642 |
// Defined for RAM disk performance
|
|
643 |
TBool iRAMDiskPerfEnabled; // flag to indicate RAM disk feature is enabled from cenrep.
|
|
644 |
TUint64 iMaximumAllowedRAMDiskSpaceToCopy; // maximum number of megabytes allow to do RAM disk operation.
|
|
645 |
TFileName iRAMFolder;
|
|
646 |
TChar iRAMDrive;
|
|
647 |
TBool iRAMInUse;
|
|
648 |
TInt64 iEstimatedDBSizes;
|
|
649 |
};
|
|
650 |
|
|
651 |
#endif // MPXDBMANAGER_H
|