extMtlParamDb.h

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/*******************************************************************************
** Copyright (c) 2004 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/
/*******************************************************************************
** $RCSfile: extMtlParamDb.h,v $ $Revision: 1.2 $ $State: Exp $
*******************************************************************************/

#ifndef DtExtMtlParameterDb_H_
#define DtExtMtlParameterDb_H_

#include "vrfobjparam/mtlParamDb.h"

//class DtExtMtlParameterDb:
//
//Instances of DtExtMtlParameterDb extend the DtMtlParameterDb class to 
//create derived kinds of DtMtlParamDbReader and DtMtlParamDbWriter classes
//that know how to preserve comments when loading and saving parameter
//database files.

class DtExtMtlParameterDb : public DtMtlParameterDb
{
public:

   //default constructor
   DtExtMtlParameterDb();

   //destructor
   virtual ~DtExtMtlParameterDb();

   //Saves contents of parameter database to file.  Filename will be
   //given .opd file extension if it does not already exist.  Creates
   //subdirectory of the same name minus the .opd extension and places
   //individual object parameter entry files (.ope) for each entry in the
   //database.  Object parameter database file will contain list of filenames
   //referencing individual .ope files.
   //Override to register callback to look up and write out any associated
   //comments before calling putself.
   virtual bool save(const DtFilename& filename);

protected:

   //Override to create a DtExtMtlParameterDbEntry.
   virtual DtVrfParameterDbEntry* createParameterEntry() const;

   //Override to create an instance of DtExtMtlParameterDbReader.
   virtual DtMtlParameterDbReader* createParamDbReader();

   //Override to create an instance of DtExtMtlParameterDbWriter.
   virtual DtMtlParameterDbWriter* createMtlParamDbWriter();

   //copy constructor - not implemented
   DtExtMtlParameterDb(const DtExtMtlParameterDb& orig);

   //assignment operator - not implemented
   DtExtMtlParameterDb& operator=(const DtExtMtlParameterDb& orig);
};

#endif