variableNodeMap_inl.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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 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
 *       - Christophe GONZALES(_at_AMU)                                     *
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#pragma once
 

#include <agrum/base/graphicalModels/variableNodeMap.h>   // to ease IDE parser
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
// to ease parsers in IDE
#  include <agrum/base/graphicalModels/variableNodeMap.h>
 
namespace gum {
 
  // Returns a discrete variable given it's node id.
  // @throws NotFound Raised if no nodes matches id.
  INLINE
  const DiscreteVariable& VariableNodeMap::get(NodeId id) const {
    return *(_nodes2vars_.second(id));
  }
 
  // Returns a node id given it's variable.
  // @throws NotFound Raised if no nodes matches var.
  INLINE
  NodeId VariableNodeMap::get(const DiscreteVariable& var) const {
    return _nodes2vars_.first(&var);
  }
 
  // Return true if id matches a node
  INLINE
  bool VariableNodeMap::exists(NodeId id) const { return _nodes2vars_.existsFirst(id); }
 
  // Return true if var matches a node
  INLINE
  bool VariableNodeMap::exists(const DiscreteVariable& var) const {
    return _nodes2vars_.existsSecond(&var);
  }
 
  // Return true if name matches a node
  INLINE
  bool VariableNodeMap::exists(std::string_view name) const {
    return _names2nodes_.existsFirst(name);
  }
 
  // Return the size of the map
  INLINE
  gum::Size VariableNodeMap::size() const { return _nodes2vars_.size(); }
 
  // Returns a node id given it's variable.
  // @throws NotFound Raised if no nodes matches var.
  INLINE
  const DiscreteVariable& VariableNodeMap::operator[](NodeId varId) const { return get(varId); }
 
  // Returns a node id given it's variable.
  // @throws NotFound Raised if no nodes matches var.
  INLINE
  NodeId VariableNodeMap::operator[](const DiscreteVariable& var) const { return get(var); }
 
  // Maps id with var. Var is added by copy.
  // @throw DuplicateLabel if the name already exists in the mapping
  // @throw DuplicateElement if the id already exists in the mapping
  INLINE
  NodeId VariableNodeMap::insert(NodeId id, const DiscreteVariable& var) {
    if (_names2nodes_.existsFirst(var.name())) {
      GUM_ERROR(DuplicateLabel, "Unable to insert var with the name '" << var.name() << "'.")
    }
 
    if (exists(id)) {
      GUM_ERROR(DuplicateElement, "Unable to insert a new variable with id " << id << ".")
    }
 
    _nodes2vars_.insert(id, var.clone());
    _names2nodes_.insert(var.name(), id);
 
    return id;
  }
 
  // Removes a var and it's id of this mapping. The pointer is deleted.
  INLINE
  void VariableNodeMap::erase(NodeId id) {
    const DiscreteVariable* var = _nodes2vars_.second(id);
    _names2nodes_.eraseFirst(var->name());
    delete var;
    _nodes2vars_.eraseFirst(id);
  }
 
  // Removes a var and it's id of this mapping. The pointer is deleted.
  INLINE
  void VariableNodeMap::erase(const DiscreteVariable& var) {
    NodeId id = _nodes2vars_.first(&var);
    erase(id);
  }
 
  INLINE
  NodeId VariableNodeMap::idFromName(std::string_view name) const {
    return _names2nodes_.second(name);
  }
 
  INLINE
  const DiscreteVariable& VariableNodeMap::variableFromName(std::string_view name) const {
    return *_nodes2vars_.second(idFromName(name));
  }
 
  // we allow the user to change the name of a variable
  // @throws DuplicateLabel if this name already exists
  // @throws NotFound Raised if no nodes matches id.
  INLINE
  void VariableNodeMap::changeName(NodeId id, std::string_view new_name) {
    if (_names2nodes_.existsFirst(new_name)) {
      GUM_ERROR(DuplicateLabel, "Unable to insert var with the name '" << new_name << "'.")
    }
 
    auto var = const_cast< DiscreteVariable* >(_nodes2vars_.second(id));
 
    _names2nodes_.eraseFirst(var->name());
    var->setName(new_name);
    _names2nodes_.insert(std::string(new_name), id);
  }
 
  INLINE const std::string& VariableNodeMap::name(NodeId id) const {
    return _names2nodes_.first(id);
  }
 
  INLINE const std::string& VariableNodeMap::name(const DiscreteVariable& var) const {
    return _names2nodes_.first(_nodes2vars_.first(&var));
  }
 
} /* namespace gum */
 
#endif /*DOXYGEN_SHOULD_SKIP_THIS*/