Parsers/detail/Conversions.h

0001 #ifndef PARSERS_DETAIL_CONVERSIONS_H
0002 #define PARSERS_DETAIL_CONVERSIONS_H
0003
0004 //==========================================================================
0005 //  AIDA Detector description implementation
0006 //--------------------------------------------------------------------------
0007 // Copyright (C) Organisation europeenne pour la Recherche nucleaire (CERN)
0008 // All rights reserved.
0009 //
0010 // For the licensing terms see $DD4hepINSTALL/LICENSE.
0011 // For the list of contributors see $DD4hepINSTALL/doc/CREDITS.
0012 //
0013 // Author     : M.Frank
0014 //
0015 //==========================================================================
0016
0017 /**
0018  *  Note: Do NEVER include this file directly!
0019  *
0020  *  Use the specific include files in the XML or JSON directory!
0021  *
0022  */
0023
0024
0025 // C/C++ include files
0026 #include <map>
0027 #include <iostream>
0028
0029 // Framework include files
0030
0031
0032 /// Namespace for the AIDA detector description toolkit
0033 namespace dd4hep {
0034
0035   /// Forward declaration
0036   class Detector;
0037
0038   /// Namespace for the AIDA detector description toolkit supporting XML utilities
0039   namespace DD4HEP_CONVERSION_NS {
0040     class Handle_t;
0041   }
0042
0043   /// Basic conversion objects for handling dd4hep XML files.
0044   /**
0045    *  \author   M.Frank
0046    *  \version  1.0
0047    *  \ingroup DD4HEP_XML
0048    */
0049   template <typename T, typename ARG=DD4HEP_CONVERSION_NS::Handle_t> struct Converter {
0050   public:
0051     typedef T                to_type;
0052     typedef Converter<T,ARG> self_type;
0053     typedef void*            user_param;
0054   public:
0055     /// Reference to the detector description object
0056     Detector& description;
0057     /// Reference to optional user defined parameter
0058     user_param param;
0059     /// Reference to second optional user defined parameter
0060     user_param optional;
0061   public:
0062     /// Initializing constructor of the functor
0063     Converter(Detector& l) : description(l), param(0), optional(0) { }
0064     /// Initializing constructor of the functor with initialization of the user parameter
0065     Converter(Detector& l, user_param p) : description(l), param(p), optional(0) { }
0066     /// Initializing constructor of the functor with initialization of the user parameter
0067     Converter(Detector& l, user_param p, user_param o) : description(l), param(p), optional(o)  { }
0068     /// Callback operator to be specialized depending on the element type
0069     void operator()(ARG handle) const;
0070     /// Typed access to the 1rst. user parameter (unchecked)
0071     template <typename TYPE> TYPE* _param() const  {    return (TYPE*) param;     }
0072     /// Typed object access to the 1rst. user parameter (unchecked)
0073     template <typename TYPE> TYPE& _object() const {    return *(TYPE*) param;    }
0074     /// Typed access to the 2nd. user parameter (unchecked)
0075     template <typename TYPE> TYPE* _option() const {    return (TYPE*) optional;  }
0076   };
0077 } /* End namespace dd4hep           */
0078
0079 #endif