Teuchos_AbstractFactoryStd.hpp

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// 
//                    Teuchos: Common Tools Package
//                 Copyright (2004) Sandia Corporation
// 
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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// Lesser General Public License for more details.
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#ifndef TEUCHOS_ABSTRACT_FACTORY_STD_HPP
#define TEUCHOS_ABSTRACT_FACTORY_STD_HPP

#include "Teuchos_AbstractFactory.hpp"

namespace Teuchos {

template<class T_impl>
class PostModNothing {
public:
  void initialize(T_impl* p) const {} // required!
};

template<class T_impl>
class AllocatorNew {
public:
  typedef Teuchos::RefCountPtr<T_impl>  ptr_t;                         // required!
  const ptr_t allocate() const { return Teuchos::rcp(new T_impl()); }  // required!
};

template<class T_itfc, class T_impl
         ,class T_PostMod = PostModNothing<T_impl>
         ,class T_Allocator = AllocatorNew<T_impl>
        >
class AbstractFactoryStd : public AbstractFactory<T_itfc> {
public:

  typedef typename Teuchos::AbstractFactory<T_itfc>::obj_ptr_t   obj_ptr_t;  // RAB: 20030916: G++ 3.2 complains without this
/*
#ifdef _MIPS_CXX
  typedef typename MemMngPack::AbstractFactory<T_itfc>::obj_ptr_t   obj_ptr_t;
    typedef T_PostMod                                                 post_mod_t;
    typedef T_Allocator                                               allocator_t;
#endif
*/

  AbstractFactoryStd( const T_PostMod& post_mod = T_PostMod(), const T_Allocator& alloc = T_Allocator() );

  obj_ptr_t create() const;

private:
  T_PostMod    post_mod_;
  T_Allocator  alloc_;

}; // end class AbstractFactorStd

template<class T_itfc, class T_impl, class T_Allocator >
const Teuchos::RefCountPtr<const AbstractFactory<T_itfc> >
abstract_factory_std_alloc(
  const T_Allocator&  alloc = T_Allocator()
  )
{
  return rcp(
    new AbstractFactoryStd<T_itfc,T_impl,PostModNothing<T_impl>,T_Allocator>(
      PostModNothing<T_impl>(), alloc )
    );
}

// ///////////////////////////////////////////////////////
// Template member definitions

template<class T_itfc, class T_impl, class T_PostMod, class T_Allocator>
inline
AbstractFactoryStd<T_itfc,T_impl,T_PostMod,T_Allocator>::AbstractFactoryStd(
  const T_PostMod& post_mod, const T_Allocator& alloc
  )
  :post_mod_(post_mod)
  ,alloc_(alloc)
{}

template<class T_itfc, class T_impl, class T_PostMod, class T_Allocator>
inline
typename AbstractFactoryStd<T_itfc,T_impl,T_PostMod,T_Allocator>::obj_ptr_t
AbstractFactoryStd<T_itfc,T_impl,T_PostMod,T_Allocator>::create() const
{
  typename T_Allocator::ptr_t
    ptr = alloc_.allocate();
  post_mod_.initialize(ptr.get());
  return ptr;
}

} // end Teuchos

#endif // TEUCHOS_ABSTRACT_FACTORY_STD_HPP

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