projectionRegister4MultiDim_tpl.h

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 *   This file is part of the aGrUM/pyAgrum library.                        *
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 *   Copyright (c) 2005-2026 by                                             *
 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
 *       - Christophe GONZALES(_at_AMU)                                     *
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 *   SPDX-FileCopyrightText: Copyright 2005-2026                            *
 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
 *       - Christophe GONZALES(_at_AMU)                                     *
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#pragma once
 

 
#include <agrum/base/multidim/utils/operators/projectionRegister4MultiDim.h>   // to ease IDE parser
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
#  include <agrum/agrum.h>
 
#  include <agrum/base/multidim/utils/operators/projectionRegister4MultiDim.h>
 
namespace gum {
 
  // adds a new entry into the register
  template < typename GUM_ELEMENT >
  void ProjectionRegister4MultiDim< GUM_ELEMENT >::insert(
      std::string_view                                                   projection_name,
      std::string_view                                                   type_multidim,
      typename ProjectionRegister4MultiDim< GUM_ELEMENT >::ProjectionPtr newFunction) {
    // insert the new entry
    ProjectionSet* theset;
 
    if (!_set_.exists(projection_name)) {
      theset = _set_.insert(std::string{projection_name}, new ProjectionSet).second;
#  ifdef GUM_DEBUG_MODE
      // for debugging purposes, we should inform the aGrUM's debugger that
      // the hashtable contained within the ProjectionRegister4MultiDim will be
      // removed at the end of the program's execution.
      __debug__::_inc_deletion_("HashTable", __FILE__, __LINE__, "destructor of", (void*)theset);
#  endif /* GUM_DEBUG_MODE */
    } else {
      theset = _set_[projection_name];
    }
 
    theset->insert(std::string{type_multidim}, newFunction);
  }
 
  // removes a given entry from the register
  template < typename GUM_ELEMENT >
  void ProjectionRegister4MultiDim< GUM_ELEMENT >::erase(std::string_view projection_name,
                                                         std::string_view type_multidim) {
    if (!_set_.exists(projection_name)) return;
 
    ProjectionSet* theset = _set_[projection_name];
 
    theset->erase(type_multidim);
  }
 
  // indicates whether a given entry exists in the register
  template < typename GUM_ELEMENT >
  bool ProjectionRegister4MultiDim< GUM_ELEMENT >::exists(std::string_view projection_name,
                                                          std::string_view type_multidim) const {
    if (!_set_.exists(projection_name)) return false;
 
    const ProjectionSet& theset = *(_set_[projection_name]);
    return theset.exists(type_multidim);
  }

  template < typename GUM_ELEMENT >
  typename ProjectionRegister4MultiDim< GUM_ELEMENT >::ProjectionPtr
      ProjectionRegister4MultiDim< GUM_ELEMENT >::get(std::string_view projection_name,
                                                      std::string_view type_multidim) const {
    const ProjectionSet& theset = *(_set_[projection_name]);
    return theset[type_multidim];
  }
 
  // a named constructor that constructs one and only one Register per data
  // type
  template < typename GUM_ELEMENT >
  ProjectionRegister4MultiDim< GUM_ELEMENT >&
      ProjectionRegister4MultiDim< GUM_ELEMENT >::Register() {
    // Here, this initialization is thread-safe due to Meyer’s Singleton property
    static ProjectionRegister4MultiDim container;
 
#  ifdef GUM_DEBUG_MODE
    static std::atomic_flag first = ATOMIC_FLAG_INIT;
    if (!first.test_and_set()) {
      // for debugging purposes, we should inform the aGrUM's debugger that
      // the hashtable contained within the ProjectionRegister4MultiDim will be
      // removed at the end of the program's execution.
      __debug__::_inc_deletion_("HashTable",
                                __FILE__,
                                __LINE__,
                                "destructor of",
                                (void*)&container._set_);
    }
#  endif /* GUM_DEBUG_MODE */
 
    return container;
  }
 
  // Default constructor: creates an empty register
  template < typename GUM_ELEMENT >
  ProjectionRegister4MultiDim< GUM_ELEMENT >::ProjectionRegister4MultiDim() = default;
 
  // destructor
  template < typename GUM_ELEMENT >
  ProjectionRegister4MultiDim< GUM_ELEMENT >::~ProjectionRegister4MultiDim() {
    // remove all the sets
    for (typename HashTable< std::string, ProjectionSet* >::iterator_safe iter = _set_.beginSafe();
         iter != _set_.endSafe();
         ++iter)
      delete iter.val();
  }
 
  // a function to more easily register new projection functions in MultiDims
  template < typename GUM_ELEMENT >
  void registerProjection(
      std::string_view                                                   projection_name,
      std::string_view                                                   type_multidim,
      typename ProjectionRegister4MultiDim< GUM_ELEMENT >::ProjectionPtr function) {
    ProjectionRegister4MultiDim< GUM_ELEMENT >::Register().insert(projection_name,
                                                                  type_multidim,
                                                                  function);
  }
 
} /* namespace gum */
 
#endif /* DOXYGEN_SHOULD_SKIP_THIS */