Sacado_TemplateManager.hpp

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// $Id$ 
// $Source$ 
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// 
//                           Sacado Package
//                 Copyright (2006) Sandia Corporation
// 
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
// 
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//  
// 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 GNU
// Lesser General Public License for more details.
//  
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// Questions? Contact David M. Gay (dmgay@sandia.gov) or Eric T. Phipps
// (etphipp@sandia.gov).
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#ifndef SACADO_TEMPLATEMANAGER_HPP
#define SACADO_TEMPLATEMANAGER_HPP

#include <vector>
#include <typeinfo>

#include "Teuchos_RCP.hpp"

#include "Sacado_mpl_size.hpp"
#include "Sacado_mpl_find.hpp"
#include "Sacado_mpl_for_each.hpp"
#include "Sacado_mpl_apply.hpp"

#include "Sacado_TemplateIterator.hpp"

namespace Sacado {


  template <typename TypeSeq, typename BaseT, typename ObjectT>
  class TemplateManager {

    struct type_info_less {
      bool operator() (const std::type_info* a, const std::type_info* b) {
        return a->before(*b);
      }
    };

    template <typename BuilderOpT>
    struct BuildObject {
      std::vector< Teuchos::RCP<BaseT> >* objects;
      const BuilderOpT& builder;
      BuildObject(std::vector< Teuchos::RCP<BaseT> >& objects_,
                  const BuilderOpT& builder_) :
        objects(&objects_), builder(builder_) {}
      template <typename T> void operator()(T) const {
        int idx = mpl::find<TypeSeq,T>::value;
        (*objects)[idx] = builder.template build<T>();
      }
    };

  public:

    typedef TemplateIterator<BaseT> iterator;

    typedef ConstTemplateIterator<BaseT> const_iterator;

    struct DefaultBuilderOp {

      template<class ScalarT>
      Teuchos::RCP<BaseT> build() const {
        typedef typename Sacado::mpl::apply<ObjectT,ScalarT>::type type;
        return Teuchos::rcp( dynamic_cast<BaseT*>( new type ) );
      }

    };

    TemplateManager();

    ~TemplateManager();

    template <typename BuilderOpT>
    void buildObjects(const BuilderOpT& builder);

    void buildObjects();

    template<typename ScalarT>
    Teuchos::RCP<BaseT> getAsBase();

    template<typename ScalarT>
    Teuchos::RCP<const BaseT> getAsBase() const;

    template<typename ScalarT>
    Teuchos::RCP< typename Sacado::mpl::apply<ObjectT,ScalarT>::type > getAsObject();

    template<typename ScalarT>
    Teuchos::RCP< const typename Sacado::mpl::apply<ObjectT,ScalarT>::type > getAsObject() const;

    typename Sacado::TemplateManager<TypeSeq,BaseT,ObjectT>::iterator begin();

    typename Sacado::TemplateManager<TypeSeq,BaseT,ObjectT>::const_iterator 
    begin() const;

    typename Sacado::TemplateManager<TypeSeq,BaseT,ObjectT>::iterator end();

    typename Sacado::TemplateManager<TypeSeq,BaseT,ObjectT>::const_iterator 
    end() const;

  private:

    std::vector< Teuchos::RCP<BaseT> > objects;

  };

}

// Include template definitions
#include "Sacado_TemplateManagerImp.hpp"

#endif