source: osgVisual/include/extLink/dataIO_extLink.h @ 32

#pragma once
/* -*-c++-*- osgVisual - Copyright (C) 2009-2010 Torben Dannhauer
 *
 * This library is based on OpenSceneGraph, 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.
 *
 * osgVisual requires for some proprietary modules a license from the correspondig manufacturer.
 * You have to aquire licenses for all used proprietary modules.
 * 
 * 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.
*/

#include <osg/Referenced>
#include <osg/Node>
#include <dataIO_slot.h>


namespace osgVisual
{ 

/**
 * \brief This class is the interface definition class for valid externalLink (extLink) implementations.
 * 
 * This class is an abstract class, thus cannot be instantiated. Derive this class for usage.
 * 
 * @author Torben Dannhauer
 * @date  Sep 2009
 */ 

class dataIO_extLink : public osg::Referenced
{
public:
        /**
         * \brief Empty constructor
         * 
         */ 
        dataIO_extLink(std::vector<osgVisual::dataIO_slot>& dataSlots_) : dataSlots(dataSlots_){}

        /**
         * \brief Empty destructor
         * 
         * @return 
         */ 
        virtual ~dataIO_extLink() {}

        /**
         * \brief Pure virtual function for initialization. Must be implemented in derived class.
         * 
         */ 
        virtual void init() = 0;

        virtual void shutdown() = 0;

        /**
         * \brief Pure virtual function for reading TO_OBJ values form the external link. Must be implemented in derived class.
         * 
         * @return : See derived class.
         */ 
        virtual bool readTO_OBJvalues() = 0;

        /**
         * \brief Pure virtual function for writing return values back to the external link. Must be implemented in derived class.
         * 
         * @return : See derived class.
         */ 
        virtual bool writebackFROM_OBJvalues() = 0;

protected:
        /**
         * Nested external link for more then one external source.
         */ 
        osg::ref_ptr<dataIO_extLink> extLink;

        /**
         * Flag to indicate if this class is initialized.
         */ 
        bool initialized;

        /**
         * Reference to dataIO's central managed dataSlots.
         * This central dataSlot array is filled with available slots by this extLink class.
         */ 
        std::vector<dataIO_slot>& dataSlots;
 
};

}       // END NAMESPACE