/**
*  Copyright Mikael Högdahl - triyana@users.sourceforge.net
*
*  This source is distributed under the terms of the Q Public License version 1.0,
*  created by Trolltech (www.trolltech.com).
*/

#ifndef MHFileTransaction_h
#define MHFileTransaction_h

#include "MH.h"
#include "MHFile.h"
#include "MHString.h"

class MHVector;



/**
*  A file transaction object. If turned on with begin all file names
*  that are returned are temporary names. To rename them call Commit
*  or do a Rollback to delete all temporary files.
*/
class MHFileTransaction : public MH {
public:
                                MHFileTransaction ();
                                ~MHFileTransaction ();

    const char*                 Class () {return "MHFileTransaction";}
    static void                 Begin ();
    static bool                 Commit ();
    static void                 GetFileName (const char* orgName, MHString* newName, bool read) {if (MHFileTransaction::aaTransaction) MHFileTransaction::aaTransaction->getFileName (orgName, newName, read); else *newName = orgName;}
    static void                 Rollback ();

private:
    MHVector*                   aOrgFiles;
    MHVector*                   aNewFiles;
    static MHFileTransaction*   aaTransaction;

    void                        Check (bool rollback);
    bool                        commit2 ();
    void                        getFileName (const char* orgName, MHString* newName, bool read);
    void                        rollback2 ();
};

#endif