--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/srsf/sisrscontrollerplugin/src/sidatabase.h	Wed Sep 01 12:29:17 2010 +0100
@@ -0,0 +1,211 @@
+/*
+* Copyright (c) 2004-2007 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:  This class implements the SI Controller Plugin database.
+*
+*/
+
+
+
+#ifndef SIDATABASE_H
+#define SIDATABASE_H
+
+//  INCLUDES
+#include <d32dbms.h>
+#include <e32svr.h>
+#include <sysutil.h> // Critical Level check
+#include <f32file.h>
+
+
+class CNssBackupObserver;
+
+// CLASS DECLARATION
+
+/**
+*  This class is the base class for all SI Controller Plugin DB classes.
+*  It provides the common functionality for the DB classes.
+*
+*  @lib SIControllerPlugin.lib
+*  @since 2.8
+*/
+class CSIDatabase : public CBase
+    {
+    public:  // Constructors and destructor
+
+        /**
+        * Two-phased constructor.
+        */
+        static CSIDatabase* NewL(TFileName aDatabaseFileName);
+
+ 		/**
+        * Destructor.
+        */
+        virtual ~CSIDatabase();
+
+    public: // New functions
+
+        /**
+        * Begins a database transaction if not already.
+        * @since 2.8
+        * @return	Reference to the database.
+        */
+		void BeginTransactionL();
+
+        /**
+        * Commits all changes to the database.
+        * @since 2.8
+        */
+		void CommitChangesL( TBool aCompact );
+
+        /**
+        * Rollback all changes to the database.
+        * @since 2.8
+        */
+		void Rollback();
+
+        /**
+        * Checks to see if ID tables exist.
+        * @since 2.8
+        * @return	ETrue if ID tables exist; EFalse otherwise.
+        */
+		TBool DoIDTablesExistL();
+
+        /**
+        * @todo Add comments
+        */
+        TBool DoesLockTableExistL();
+
+        /**
+        * @todo Add comments
+        */
+        TBool DoesModelBankTableExistL();
+
+        /**
+        * @todo Add comments
+        */
+        TBool DoesLexiconTableExistL();
+
+        /**
+        * @todo Add comments
+        */
+        TBool DoesGrammarTableExistL();
+
+
+        /**
+        * Returns a reference to the database.
+        * @since 2.8
+        * @return	Reference to the database.
+        */
+		RDbNamedDatabase& SIDatabase();
+
+        /**
+        * Returns a reference to DB session.
+        * @since 2.8
+        * @return	Reference to the database.
+        */
+		RDbs& DbSession();
+
+        /**
+        * Returns a drive for DB file.
+        * @since 2.8
+        * @return	Reference to the session.
+        */
+		TInt DbDrive();
+
+        /**
+        * Creates a small table to the database. Writing of this table is tried
+        * when acquiring for a write lock.
+        */
+        void CreateLockTableL();
+
+		/**
+		* Permit transactions. Used when e.g. backup or restore begins 
+		* @since 3.1
+		*/
+		void LockTransactionsL();
+
+		/**
+		* Allow transactions. Used when e.g. backup or restore ends 
+		* @since 3.1
+		*/
+		void UnlockTransactionsL();
+		
+        /**
+        * Opens a database session.  If database file doesn't exist, it creates one.
+        * @since 2.8
+        */
+        void OpenDatabaseL();
+        
+        /**
+	    * Close database.
+	    * @since 3.1
+	    * @return Symbian-wide error codes
+	    */
+		TInt  CloseDatabase();
+		
+     private:
+
+        /**
+        * C++ default constructor.
+        */
+        CSIDatabase(TFileName aDbFileName);
+
+        /**
+        * By default Symbian 2nd phase constructor is private.
+        */
+        void ConstructL();
+
+        /**
+        * Creates a new database file.
+        * @since 2.8
+        */
+		void CreateDatabaseL();
+
+
+
+
+    public:    // Data
+
+		// Database session
+		RDbs iDbSession;
+
+		// Database
+        RDbNamedDatabase iDb;
+
+		// Indication for outstanding transaction by this client
+		TBool iOpenTransaction;
+
+		// Name of the database file	
+		TFileName iDatabaseFileName;
+
+        // drive for the database file
+        TInt iDatabaseDrive;
+
+        // Indication if database connection is open
+        TBool iDatabaseOpen;
+
+        // Mutex for DB write lock
+        // Makes sure that only one process gets the DB lock
+        RMutex iMutex; 
+        
+        // Critical section is used in locking transactions inside one object
+        RCriticalSection iCriticalSection;
+        
+        // backup and restore observer
+        CNssBackupObserver* iBackupObserver;
+        
+    };
+
+#endif // SIDATABASE_H
+
+// End of File