| # Gaudi Framework, version v21r8 |

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# AlgFactory.h

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    00001 // $Header: /tmp/svngaudi/tmp.jEpFh25751/Gaudi/GaudiKernel/GaudiKernel/AlgFactory.h,v 1.10 2008/10/09 21:00:37 marcocle Exp $
    00002 #ifndef GAUDIKERNEL_ALGFACTORY_H
    00003 #define GAUDIKERNEL_ALGFACTORY_H
    00004
    00005 #include "GaudiKernel/Kernel.h"
    00006 #include "Reflex/PluginService.h"
    00007 #include "RVersion.h"
    00008
    00009 // The following is needed to be backward compatible with the old factories of Gaudi. Otherwise the components
    00010 // having the constructor/destructor protected will not be working
    00011
    00012 class IAlgorithm;
    00013 class ISvcLocator;
    00014
    00015 template <typename T> class AlgFactory {
    00016 public:
    00017   static IAlgorithm* create(const std::string& name, ISvcLocator *svcloc) {
    00018     return new T(name, svcloc );
    00019   }
    00020 };
    00021
    00022 namespace {
    00023   template < typename P > class Factory<P, IAlgorithm*(std::string, ISvcLocator*)> {
    00024   public:
    00025 #if ROOT_VERSION_CODE < ROOT_VERSION(5,21,6)
    00026     static void* Func( void*, const std::vector<void*>& arg, void*) {
    00027       return AlgFactory<P>::create(*(std::string*)(arg[0]), (ISvcLocator*)(arg[1]));
    00028     }
    00029 #else
    00030     static void Func( void *retaddr, void*, const std::vector<void*>& arg, void*) {
    00031       *(IAlgorithm**) retaddr = AlgFactory<P>::create(*(std::string*)(arg[0]), (ISvcLocator*)(arg[1]));
    00032     }
    00033 #endif
    00034   };
    00035 }
    00036
    00037 // Macros to declare component factories
    00038 #define DECLARE_ALGORITHM_FACTORY(x)          PLUGINSVC_FACTORY(x,IAlgorithm*(std::string, ISvcLocator*))
    00039 #define DECLARE_NAMED_ALGORITHM_FACTORY(x,n)  PLUGINSVC_FACTORY_WITH_ID(x,std::string(#n), IAlgorithm*(std::string, ISvcLocator*))
    00040
    00041 #define DECLARE_NAMESPACE_ALGORITHM_FACTORY(n,x)  using n::x; PLUGINSVC_FACTORY(x,IAlgorithm*(std::string, ISvcLocator*))
    00042 #define DECLARE_ALGORITHM(x)  /*dummy*/
    00043 #define DECLARE_NAMESPACE_ALGORITHM(n,x) /*dummy*/
    00044
    00045 #endif // GAUDIKERNEL_ALGFACTORY_H