aimsGraphW.h

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/* This software and supporting documentation are distributed by
 *     Institut Federatif de Recherche 49
 *     CEA/NeuroSpin, Batiment 145,
 *     91191 Gif-sur-Yvette cedex
 *     France
 *
 * This software is governed by the CeCILL-B license under
 * French law and abiding by the rules of distribution of free software.
 * You can  use, modify and/or redistribute the software under the
 * terms of the CeCILL-B license as circulated by CEA, CNRS
 * and INRIA at the following URL "http://www.cecill.info".
 *
 * As a counterpart to the access to the source code and  rights to copy,
 * modify and redistribute granted by the license, users are provided only
 * with a limited warranty  and the software's author,  the holder of the
 * economic rights,  and the successive licensors  have only  limited
 * liability.
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 * with loading,  using,  modifying and/or developing or reproducing the
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 */

/*
 *  Region Of Interest
 */
#ifndef AIMS_IO_AIMSGRAPHW_H
#define AIMS_IO_AIMSGRAPHW_H

#include <aims/io/process.h>
#include <cartobase/object/attributed.h>

class Graph;

namespace aims
{
  struct AimsGraphWriter_Private;

  namespace internal
  {
    struct AimsGraphWriter_ElemStruct;
  }


  class AimsGraphWriter : public Process
  {
  public:
    enum SavingMode
    {
      Keep, 
      Global, 
      Local
    };

    struct Wrapper
    {
      friend class AimsGraphWriter;

      virtual ~Wrapper() {}
      virtual void destroy() {}

      virtual std::string objectType() const = 0;
      virtual std::string dataType() const = 0;

    private:
      virtual int freeindex() const = 0;
      virtual bool write( const AimsGraphWriter & ) const = 0;
    };

    template<typename T> struct ObjectWrapper : public Wrapper
    {
      friend class AimsGraphWriter;

      ObjectWrapper( T* x ) : data( x ) {}
      virtual ~ObjectWrapper() {}
      virtual void destroy() { delete data; }

      virtual std::string objectType() const;
      virtual std::string dataType() const;

      T *data;

    private:
      virtual int freeindex() const;
      virtual bool write( const AimsGraphWriter & ) const;
    };

    struct ElementInfo
    {
      Graph                     *graph;
      carto::AttributedObject   *element;
      std::string               attribute;
      Wrapper                   *object;
    };

    template<typename T> friend struct ObjectWrapper;

    AimsGraphWriter( const std::string & filename );
    virtual ~AimsGraphWriter();

    virtual void writeElements( Graph & g, SavingMode newmode = Keep, 
                                SavingMode oldmode = Keep, 
                                bool saveOnlyModified = false );

    template<class T> 
    static bool defaultTakeObject( Process &, const std::string &, Finder & );

    const ElementInfo & elementInfo() const { return( info ); }
    ElementInfo & elementInfo() { return( info ); }

  private:
    template<class T> bool write( const T & ) const;
    void writeElement( carto::AttributedObject *ao, 
                       internal::AimsGraphWriter_ElemStruct & es );

    mutable ElementInfo                 info;
    mutable AimsGraphWriter_Private     *d;
  };

}


#endif