zypp/detail/ResObjectFactory.h

   1 /*---------------------------------------------------------------------\
   2 |                          ____ _   __ __ ___                          |
   3 |                         |__  / \ / / . \ . \                         |
   4 |                           / / \ V /|  _/  _/                         |
   5 |                          / /__ | | | | | |                           |
   6 |                         /_____||_| |_| |_|                           |
   7 |                                                                      |
   8 \---------------------------------------------------------------------*/
   9 /** \file       zypp/detail/ResObjectFactory.h
  10  *
  11 */
  12 #ifndef ZYPP_DETAIL_RESOBJECTFACTORY_H
  13 #define ZYPP_DETAIL_RESOBJECTFACTORY_H
  14
  15 #include "zypp/base/PtrTypes.h"
  16
  17 ///////////////////////////////////////////////////////////////////
  18 namespace zypp
  19 { /////////////////////////////////////////////////////////////////
  20
  21   class Edition;
  22   class Arch;
  23
  24   ///////////////////////////////////////////////////////////////////
  25   namespace detail
  26   { /////////////////////////////////////////////////////////////////
  27     ///////////////////////////////////////////////////////////////////
  28     namespace _resobjectfactory_detail
  29     { /////////////////////////////////////////////////////////////////
  30
  31       template<class _Res>
  32         class ResImplConnect : public _Res
  33         {
  34         public:
  35           typedef ResImplConnect                  Self;
  36           typedef typename _Res::Impl             Impl;
  37           typedef base::shared_ptr<Impl>          ImplPtr;
  38           typedef base::intrusive_ptr<Self>       Ptr;
  39           typedef base::intrusive_ptr<const Self> constPtr;
  40         public:
  41           /** \todo protect against NULL Impl. */
  42           ResImplConnect( const std::string & name_r,
  43                           const Edition & edition_r,
  44                           const Arch & arch_r,
  45                           ImplPtr impl_r )
  46           : _Res( name_r, edition_r, arch_r )
  47           , _impl( impl_r )
  48           { _impl->_backRef = this; }
  49           virtual ~ResImplConnect()
  50           { _impl->_backRef = 0; }
  51         private:
  52           ImplPtr _impl;
  53           virtual Impl &       pimpl()       { return *_impl; }
  54           virtual const Impl & pimpl() const { return *_impl; }
  55         };
  56
  57     /////////////////////////////////////////////////////////////////
  58     } // namespace _resobjectfactory
  59     ///////////////////////////////////////////////////////////////////
  60
  61     template<class _Impl>
  62       typename _Impl::ResType::Ptr
  63       makeResolvableAndImpl( const std::string & name_r,
  64                              const Edition & edition_r,
  65                              const Arch & arch_r,
  66                              base::shared_ptr<_Impl> & impl_r )
  67       {
  68         impl_r.reset( new _Impl );
  69         return new
  70                _resobjectfactory_detail::ResImplConnect<typename _Impl::ResType>
  71                ( name_r, edition_r, arch_r, impl_r );
  72       }
  73
  74     template<class _Impl>
  75       typename _Impl::ResType::Ptr
  76       makeResolvableFromImpl( const std::string & name_r,
  77                               const Edition & edition_r,
  78                               const Arch & arch_r,
  79                               base::shared_ptr<_Impl> impl_r )
  80       {
  81         if ( ! impl_r )
  82           throw ( "makeResolvableFromImpl: NULL Impl " );
  83         if ( impl_r->self() )
  84           throw ( "makeResolvableFromImpl: Impl already managed" );
  85         return new
  86                _resobjectfactory_detail::ResImplConnect<typename _Impl::ResType>
  87                ( name_r, edition_r, arch_r, impl_r );
  88       }
  89
  90     /////////////////////////////////////////////////////////////////
  91   } // namespace detail
  92   ///////////////////////////////////////////////////////////////////
  93   /////////////////////////////////////////////////////////////////
  94 } // namespace zypp
  95 ///////////////////////////////////////////////////////////////////
  96 #endif // ZYPP_DETAIL_RESOBJECTFACTORY_H