/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield 
 *
 * This library is open source and may be redistributed and/or modified under  
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 * OpenSceneGraph Public License for more details.
*/

#ifndef OSGDB_ARCHIVE
#define OSGDB_ARCHIVE 1

#include <osgDB/ReaderWriter>


namespace osgDB {


/** Base class for implementing database Archives. */
class OSGDB_EXPORT Archive : public ReaderWriter
{
    public:
        Archive();
        virtual ~Archive(); 
        
        virtual const char* className() { return "Archive" };
        virtual bool acceptsExtension(const std::string& /*extension*/) { return true; }

        /** open the archive.*/
        virtual void open(const std::string& filename) {}
        
        /** close the archive.*/
        virtual void close() {}

        /** return true if file exists in archive.*/        
        virtual bool fileExists(const std::string& filename) const {}
        

        virtual ReadResult readObject(const std::string& /*fileName*/,const Options* =NULL) { return ReadResult(ReadResult::FILE_NOT_HANDLED); }
        virtual ReadResult readImage(const std::string& /*fileName*/,const Options* =NULL) { return ReadResult(ReadResult::FILE_NOT_HANDLED); }
        virtual ReadResult readHeightField(const std::string& /*fileName*/,const Options* =NULL) { return ReadResult(ReadResult::FILE_NOT_HANDLED); }
        virtual ReadResult readNode(const std::string& /*fileName*/,const Options* =NULL) { return ReadResult(ReadResult::FILE_NOT_HANDLED); }

        virtual WriteResult writeObject(const osg::Object& /*obj*/,const std::string& /*fileName*/,const Options* =NULL) {return WriteResult(WriteResult::FILE_NOT_HANDLED); }
        virtual WriteResult writeImage(const osg::Image& /*image*/,const std::string& /*fileName*/,const Options* =NULL) {return WriteResult(WriteResult::FILE_NOT_HANDLED); }
        virtual WriteResult writeHeightField(const osg::HeightField& /*heightField*/,const std::string& /*fileName*/,const Options* =NULL) {return WriteResult(WriteResult::FILE_NOT_HANDLED); }
        virtual WriteResult writeNode(const osg::Node& /*node*/,const std::string& /*fileName*/,const Options* =NULL) { return WriteResult(WriteResult::FILE_NOT_HANDLED); }

        virtual ReadResult readObject(std::istream& /*fin*/,const Options* =NULL) { return ReadResult(ReadResult::FILE_NOT_HANDLED); }
        virtual ReadResult readImage(std::istream& /*fin*/,const Options* =NULL) { return ReadResult(ReadResult::FILE_NOT_HANDLED); }
        virtual ReadResult readHeightField(std::istream& /*fin*/,const Options* =NULL) { return ReadResult(ReadResult::FILE_NOT_HANDLED); }
        virtual ReadResult readNode(std::istream& /*fin*/,const Options* =NULL) { return ReadResult(ReadResult::FILE_NOT_HANDLED); }

        virtual WriteResult writeObject(const osg::Object& /*obj*/,std::ostream& /*fout*/,const Options* =NULL) {return WriteResult(WriteResult::FILE_NOT_HANDLED); }
        virtual WriteResult writeImage(const osg::Image& /*image*/,std::ostream& /*fout*/,const Options* =NULL) {return WriteResult(WriteResult::FILE_NOT_HANDLED); }
        virtual WriteResult writeHeightField(const osg::HeightField& /*heightField*/,std::ostream& /*fout*/,const Options* =NULL) {return WriteResult(WriteResult::FILE_NOT_HANDLED); }
        virtual WriteResult writeNode(const osg::Node& /*node*/,std::ostream& /*fout*/,const Options* =NULL) { return WriteResult(WriteResult::FILE_NOT_HANDLED); }


};

}

#endif // OSGDB_ARCHIVE