PRMInstance_tpl.h

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/****************************************************************************
 *   This file is part of the aGrUM/pyAgrum library.                        *
 *                                                                          *
 *   Copyright (c) 2005-2026 by                                             *
 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
 *       - Christophe GONZALES(_at_AMU)                                     *
 *                                                                          *
 *   The aGrUM/pyAgrum library is free software; you can redistribute it    *
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 *   SPDX-FileCopyrightText: Copyright 2005-2026                            *
 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
 *       - Christophe GONZALES(_at_AMU)                                     *
 *   SPDX-License-Identifier: LGPL-3.0-or-later OR MIT                      *
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 *   Contact  : info_at_agrum_dot_org                                       *
 *   homepage : http://agrum.gitlab.io                                      *
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 ****************************************************************************/
 
#pragma once
 

 
#include <agrum/base/multidim/implementations/multiDimSparse.h>
#include <agrum/PRM/elements/PRMInstance.h>
 
namespace gum {
  namespace prm {
    template < GUM_Numeric GUM_SCALAR >
    PRMInstance< GUM_SCALAR >::PRMInstance(std::string_view name, PRMClass< GUM_SCALAR >& type) :
        PRMObject(name), _instantiated_(false), _type_(&type) {
      GUM_CONSTRUCTOR(PRMInstance);
 
      // First we create attributes for each aggregate in type
      for (const auto agg: _type_->aggregates())
        _copyAggregates_(agg);
 
      // We add attributes in type by reference for inner ones and by copy for
      // output ones
      for (const auto attr: _type_->attributes())
        _copyAttribute_(attr);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    PRMInstance< GUM_SCALAR >::~PRMInstance() {
      GUM_DESTRUCTOR(PRMInstance);
 
      for (const auto& elt: _nodeIdMap_)
        delete elt.second;
 
      for (const auto& elt: _referenceMap_)
        delete elt.second;
 
      for (const auto& elt: _referingAttr_)
        delete elt.second;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    void PRMInstance< GUM_SCALAR >::instantiate() {
      if (!_instantiated_) {
        _instantiated_ = true;
        _doInstantiate_();
      }
    }
 
    template < GUM_Numeric GUM_SCALAR >
    void PRMInstance< GUM_SCALAR >::_doInstantiate_() {
      // First retrieving any referenced instance
      for (const auto chain: type().slotChains()) {
        _instantiateSlotChain_(chain);
      }
 
      // Now we need to add referred instance to each input node
      // For Attributes we first add parents, then we initialize CPF
      for (const auto attr: type().attributes()) {
        _copyAttributeCPF_(_nodeIdMap_[(*attr).id()]);
      }
 
      // For PRMAggregate<GUM_SCALAR> we add parents
      for (const auto agg: type().aggregates()) {
        PRMAttribute< GUM_SCALAR >& attr = get(agg->safeName());
 
        for (const auto node: type().containerDag().parents(agg->id())) {
          if (auto p_node = _nodeIdMap_.tryGet(node)) {
            attr.addParent(*(*p_node));
          } else {
            auto elt = &(type().get(node));
            auto sc  = static_cast< PRMSlotChain< GUM_SCALAR >* >(elt);
 
            if (auto p_ref = _referenceMap_.tryGet(sc->id())) {
              for (const auto inst: *(*p_ref)) {
                attr.addParent(inst->get(sc->lastElt().safeName()));
              }
            }
          }
        }
      }
    }
 
    template < GUM_Numeric GUM_SCALAR >
    void PRMInstance< GUM_SCALAR >::_instantiateSlotChain_(PRMSlotChain< GUM_SCALAR >* sc) {
      auto first_id = sc->chain()[0]->id();
      auto p_first  = _referenceMap_.tryGet(first_id);
      if (!p_first) { return; }
      auto set = new Set< PRMInstance< GUM_SCALAR >* >(*(*p_first));
      // We proceed with a width-first run of the slot chain
      for (Size idx = 1; idx < sc->chain().size() - 1; ++idx) {
        auto temp = new Set< PRMInstance< GUM_SCALAR >* >();
        for (auto current: *set) {
          auto& ref = current->type().get(sc->chain()[idx]->name());
          for (auto next: *(current->_referenceMap_[ref.id()])) {
            temp->insert(next);
          }
        }
        delete set;
        set = temp;
      }
 
      GUM_ASSERT(set->size() > 0);
      // set contains all the instances references by sc
      if (auto p_ref = _referenceMap_.tryGet(sc->id())) {
        delete *p_ref;
        *p_ref = set;
      } else {
        _referenceMap_.insert(sc->id(), set);
      }
 
      // Add refering instances
      for (auto i: *set) {
        _addReferingInstance_(sc, i);
      }
 
      // If sc is not multiple so it can be added as a parent of an attribute
      if (!sc->isMultiple()) {
        // We should have only one instance
        // Less ugly way to get the single instance in set
        for (auto instance: *set) {
          auto& attr = instance->get(sc->lastElt().safeName());
          _bijection_.insert(&(sc->type().variable()), &(attr.type().variable()));
        }
      }
    }
 
    template < GUM_Numeric GUM_SCALAR >
    void PRMInstance< GUM_SCALAR >::add(NodeId id, PRMInstance< GUM_SCALAR >& instance) {
      if (!type().exists(id))
        GUM_ERROR(NotFound, "no ClassElement<GUM_SCALAR> matches the given id")
      PRMClassElement< GUM_SCALAR >* elt = &(type().get(id));
 
      switch (elt->elt_type()) {
        case PRMClassElement< GUM_SCALAR >::prm_refslot : {
          PRMReferenceSlot< GUM_SCALAR >* ref = static_cast< PRMReferenceSlot< GUM_SCALAR >* >(elt);
 
          // Checking if instance's type is legal
          if (!instance.type().isSubTypeOf(ref->slotType())) {
            GUM_ERROR(PRMTypeError,
                      "given Instance type is not a proper "
                      "subclass of the ReferenceSlot<GUM_SCALAR> slot type");
          }
 
          // Checking the reference's size limit
          if (auto p_ref_slot = _referenceMap_.tryGet(id);
              p_ref_slot
              && (!static_cast< PRMReferenceSlot< GUM_SCALAR >& >(type().get(id)).isArray())
              && ((*p_ref_slot)->size() == 1)) {
            GUM_ERROR(OutOfBounds, "ReferenceSlot<GUM_SCALAR> size limit reached")
          }
 
          break;
        }
 
        case PRMClassElement< GUM_SCALAR >::prm_slotchain : {
          PRMSlotChain< GUM_SCALAR >& sc
              = static_cast< PRMSlotChain< GUM_SCALAR >& >(type().get(id));
 
          // Checking if instance's type is legal
          if (!instance.type().isSubTypeOf(sc.end())) {
            GUM_ERROR(PRMTypeError,
                      "given Instance type is not a proper "
                      "subclass of the ClassElementContainer pointed"
                      " by the SlotChain<GUM_SCALAR>");
          }
 
          // Checking the reference's size limit
          if (auto p_ref_sc = _referenceMap_.tryGet(id);
              p_ref_sc && (!static_cast< PRMSlotChain< GUM_SCALAR >& >(type().get(id)).isMultiple())
              && ((*p_ref_sc)->size() == 1)) {
            GUM_ERROR(OutOfBounds, "SlotChain<GUM_SCALAR> size limit reached")
          }
 
          break;
        }
 
        default : {
          if (!type().isOutputNode(*elt)) {
            GUM_ERROR(WrongClassElement, "given ClassElement<GUM_SCALAR> is not an output node")
          }
        }
      }
 
      auto p_ref_add = _referenceMap_.tryGet(id);
      if (!p_ref_add) {
        _referenceMap_.insert(id, new Set< PRMInstance< GUM_SCALAR >* >());
        p_ref_add = _referenceMap_.tryGet(id);
      }
 
      (*p_ref_add)->insert(&instance);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    Size PRMInstance< GUM_SCALAR >::size() const {
      return _nodeIdMap_.size();
    }
 
    template < GUM_Numeric GUM_SCALAR >
    void PRMInstance< GUM_SCALAR >::_copyAggregates_(PRMAggregate< GUM_SCALAR >* source) {
      auto attr = new PRMScalarAttribute< GUM_SCALAR >(source->name(),
                                                       source->type(),
                                                       source->buildImpl());
      GUM_ASSERT(&(attr->type().variable()) != &(source->type().variable()));
      attr->setId(source->id());
      _nodeIdMap_.insert(attr->id(), attr);
      _bijection_.insert(&(source->type().variable()), &(attr->type().variable()));
    }
 
    template < GUM_Numeric GUM_SCALAR >
    void PRMInstance< GUM_SCALAR >::_copyAttribute_(PRMAttribute< GUM_SCALAR >* source) {
      auto attr = new PRMScalarAttribute< GUM_SCALAR >(source->name(), source->type());
      GUM_ASSERT(&(attr->type().variable()) != &(source->type().variable()));
      // The tensor is copied when instantiate() is called
      attr->cpf().fill((GUM_SCALAR)0);
      attr->setId(source->id());
      _bijection_.insert(&(source->type().variable()), &(attr->type().variable()));
      _nodeIdMap_.insert(attr->id(), attr);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    PRMInstance< GUM_SCALAR >::PRMInstance(const PRMInstance< GUM_SCALAR >& source) :
        PRMObject(source), _type_(source._type_) {
      GUM_CONS_CPY(PRMInstance);
      GUM_ERROR(FatalError, "do not copy Instance")
    }
 
    template < GUM_Numeric GUM_SCALAR >
    PRMInstance< GUM_SCALAR >& /**/
        PRMInstance< GUM_SCALAR >::operator=(const PRMClass< GUM_SCALAR >& from) {
      GUM_ERROR(FatalError, "do not copy Instance")
    }
 
    template < GUM_Numeric GUM_SCALAR >
    PRMObject::prm_type PRMInstance< GUM_SCALAR >::obj_type() const {
      return PRMObject::prm_type::INSTANCE;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    PRMClass< GUM_SCALAR >& PRMInstance< GUM_SCALAR >::type() {
      return *_type_;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    const PRMClass< GUM_SCALAR >& PRMInstance< GUM_SCALAR >::type() const {
      return *_type_;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    bool PRMInstance< GUM_SCALAR >::exists(NodeId id) const {
      return _nodeIdMap_.exists(id);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    bool PRMInstance< GUM_SCALAR >::exists(std::string_view name) const {
      return _type_->exists(name) && exists(_type_->get(name).id());
    }
 
    template < GUM_Numeric GUM_SCALAR >
    PRMAttribute< GUM_SCALAR >& PRMInstance< GUM_SCALAR >::get(NodeId id) {
      auto p = _nodeIdMap_.tryGet(id);
      if (!p) GUM_ERROR(NotFound, "no PRMAttribute<GUM_SCALAR> with the given NodeId")
      return *(*p);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    const PRMAttribute< GUM_SCALAR >& PRMInstance< GUM_SCALAR >::get(NodeId id) const {
      auto p = _nodeIdMap_.tryGet(id);
      if (!p) GUM_ERROR(NotFound, "no PRMAttribute<GUM_SCALAR> with the given NodeId")
      return *(*p);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    PRMAttribute< GUM_SCALAR >& PRMInstance< GUM_SCALAR >::get(std::string_view name) {
      if (!exists(name)) GUM_ERROR(NotFound, "no PRMAttribute<GUM_SCALAR> with the given name")
      return *(_nodeIdMap_[type().get(name).id()]);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    const PRMAttribute< GUM_SCALAR >& PRMInstance< GUM_SCALAR >::get(std::string_view name) const {
      if (!exists(name)) GUM_ERROR(NotFound, "no PRMAttribute<GUM_SCALAR> with the given name")
      return *(_nodeIdMap_[type().get(name).id()]);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    void PRMInstance< GUM_SCALAR >::_addReferingInstance_(PRMSlotChain< GUM_SCALAR >* sc,
                                                          PRMInstance< GUM_SCALAR >*  i) {
      NodeId      id   = i->get(sc->lastElt().safeName()).id();
      std::string name = sc->name();
 
      auto p_rm = i->_referenceMap_.tryGet(id);
      if (!p_rm) {
        i->_referenceMap_.insert(id, new Set< PRMInstance< GUM_SCALAR >* >());
        i->_referingAttr_.insert(id, new std::vector< pair >());
        p_rm = i->_referenceMap_.tryGet(id);
      }
      (*p_rm)->insert(this);
      (*i->_referingAttr_.tryGet(id))->push_back(std::make_pair(this, name));
    }
 
    template < GUM_Numeric GUM_SCALAR >
    const Bijection< const DiscreteVariable*, const DiscreteVariable* >&
        PRMInstance< GUM_SCALAR >::bijection() const {
      return _bijection_;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    const PRMInstance< GUM_SCALAR >& PRMInstance< GUM_SCALAR >::getInstance(NodeId id) const {
      auto p = _referenceMap_.tryGet(id);
      if (!p)
        GUM_ERROR(NotFound,
                  "no ReferenceSlot<GUM_SCALAR> or SlotChain<GUM_SCALAR> "
                  "matches the given NodeId")
      if ((*p)->size() > 0) {
        return **((*p)->begin());
      } else {
        GUM_ERROR(UndefinedElement, "no Instance associated with the given NodeId")
      }
    }
 
    template < GUM_Numeric GUM_SCALAR >
    const Set< PRMInstance< GUM_SCALAR >* >&
        PRMInstance< GUM_SCALAR >::getInstances(NodeId id) const {
      auto p = _referenceMap_.tryGet(id);
      if (!p)
        GUM_ERROR(NotFound,
                  "no ReferenceSlot<GUM_SCALAR> or SlotChain<GUM_SCALAR> "
                  "matches the given NodeId")
      return *(*p);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    typename PRMInstance< GUM_SCALAR >::iterator PRMInstance< GUM_SCALAR >::begin() {
      return _nodeIdMap_.begin();
    }
 
    template < GUM_Numeric GUM_SCALAR >
    const typename PRMInstance< GUM_SCALAR >::iterator& PRMInstance< GUM_SCALAR >::end() {
      return _nodeIdMap_.end();
    }
 
    template < GUM_Numeric GUM_SCALAR >
    typename PRMInstance< GUM_SCALAR >::const_iterator PRMInstance< GUM_SCALAR >::begin() const {
      return _nodeIdMap_.begin();
    }
 
    template < GUM_Numeric GUM_SCALAR >
    const typename PRMInstance< GUM_SCALAR >::const_iterator&
        PRMInstance< GUM_SCALAR >::end() const {
      return _nodeIdMap_.end();
    }
 
    template < GUM_Numeric GUM_SCALAR >
    typename PRMInstance< GUM_SCALAR >::RefIterator PRMInstance< GUM_SCALAR >::begin(NodeId id) {
      auto p = _referenceMap_.tryGet(id);
      if (!p) GUM_ERROR(NotFound, "no referred instances from this NodeId")
      return PRMInstance< GUM_SCALAR >::RefIterator(*(*p));
    }
 
    template < GUM_Numeric GUM_SCALAR >
    typename PRMInstance< GUM_SCALAR >::RefConstIterator
        PRMInstance< GUM_SCALAR >::begin(NodeId id) const {
      auto p = _referenceMap_.tryGet(id);
      if (!p) GUM_ERROR(NotFound, "no referred instances from this NodeId")
      return PRMInstance< GUM_SCALAR >::RefConstIterator(*(*p));
    }
 
    template < GUM_Numeric GUM_SCALAR >
    PRMInstance< GUM_SCALAR >::RefIterator::RefIterator(Set< PRMInstance< GUM_SCALAR >* >& set) :
        _set_(set), _iter_(set.begin()) {
      GUM_CONSTRUCTOR(PRMInstance< GUM_SCALAR >::RefIterator);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    PRMInstance< GUM_SCALAR >::RefIterator::RefIterator(const RefIterator& from) :
        _set_(const_cast< Set< PRMInstance< GUM_SCALAR >* >& >(from._set_)), _iter_(from._iter_) {
      GUM_CONS_CPY(PRMInstance< GUM_SCALAR >::RefIterator);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    PRMInstance< GUM_SCALAR >::RefIterator::~RefIterator() {
      GUM_DESTRUCTOR(PRMInstance< GUM_SCALAR >::RefIterator);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    typename PRMInstance< GUM_SCALAR >::RefIterator&
        PRMInstance< GUM_SCALAR >::RefIterator::operator=(const RefIterator& from) {
      _iter_ = from._iter_;
      return *this;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    typename PRMInstance< GUM_SCALAR >::RefIterator&
        PRMInstance< GUM_SCALAR >::RefIterator::operator++() {
      ++_iter_;
      return *this;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    bool PRMInstance< GUM_SCALAR >::RefIterator::isEnd() const {
      return _iter_ == _set_.end();
    }
 
    template < GUM_Numeric GUM_SCALAR >
    bool PRMInstance< GUM_SCALAR >::RefIterator::operator!=(const RefIterator& from) const {
      return _iter_ != from._iter_;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    bool PRMInstance< GUM_SCALAR >::RefIterator::operator==(const RefIterator& from) const {
      return _iter_ == from._iter_;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    PRMInstance< GUM_SCALAR >& PRMInstance< GUM_SCALAR >::RefIterator::operator*() const {
      return **_iter_;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    PRMInstance< GUM_SCALAR >* PRMInstance< GUM_SCALAR >::RefIterator::operator->() const {
      return *_iter_;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    PRMInstance< GUM_SCALAR >::RefConstIterator::RefConstIterator(
        const Set< PRMInstance< GUM_SCALAR >* >& set) : _set_(set), _iter_(set.begin()) {
      GUM_CONSTRUCTOR(PRMInstance< GUM_SCALAR >::RefConstIterator);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    PRMInstance< GUM_SCALAR >::RefConstIterator::RefConstIterator(const RefConstIterator& from) :
        _set_(from._set_), _iter_(from._iter_) {
      GUM_CONS_CPY(PRMInstance< GUM_SCALAR >::RefConstIterator);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    PRMInstance< GUM_SCALAR >::RefConstIterator::~RefConstIterator() {
      GUM_DESTRUCTOR(PRMInstance< GUM_SCALAR >::RefConstIterator);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    typename PRMInstance< GUM_SCALAR >::RefConstIterator&
        PRMInstance< GUM_SCALAR >::RefConstIterator::operator=(const RefConstIterator& from) {
      _iter_ = from._iter_;
      return *this;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    typename PRMInstance< GUM_SCALAR >::RefConstIterator&
        PRMInstance< GUM_SCALAR >::RefConstIterator::operator++() {
      ++_iter_;
      return *this;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    bool PRMInstance< GUM_SCALAR >::RefConstIterator::isEnd() const {
      return _iter_ == _set_.end();
    }
 
    template < GUM_Numeric GUM_SCALAR >
    bool PRMInstance< GUM_SCALAR >::RefConstIterator::operator!=(
        const RefConstIterator& from) const {
      return _iter_ != from._iter_;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    bool PRMInstance< GUM_SCALAR >::RefConstIterator::operator==(
        const RefConstIterator& from) const {
      return _iter_ == from._iter_;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    const PRMInstance< GUM_SCALAR >&
        PRMInstance< GUM_SCALAR >::RefConstIterator::operator*() const {
      return **_iter_;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    const PRMInstance< GUM_SCALAR >*
        PRMInstance< GUM_SCALAR >::RefConstIterator::operator->() const {
      return *_iter_;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    typename PRMInstance< GUM_SCALAR >::InvRefIterator PRMInstance< GUM_SCALAR >::beginInvRef() {
      return _referingAttr_.begin();
    }
 
    template < GUM_Numeric GUM_SCALAR >
    const typename PRMInstance< GUM_SCALAR >::InvRefIterator&
        PRMInstance< GUM_SCALAR >::endInvRef() {
      return _referingAttr_.end();
    }
 
    template < GUM_Numeric GUM_SCALAR >
    typename PRMInstance< GUM_SCALAR >::InvRefConstIterator
        PRMInstance< GUM_SCALAR >::beginInvRef() const {
      return _referingAttr_.begin();
    }
 
    template < GUM_Numeric GUM_SCALAR >
    const typename PRMInstance< GUM_SCALAR >::InvRefConstIterator&
        PRMInstance< GUM_SCALAR >::endInvRef() const {
      return _referingAttr_.end();
    }
 
    template < GUM_Numeric GUM_SCALAR >
    std::vector< std::pair< PRMInstance< GUM_SCALAR >*, std::string > >&
        PRMInstance< GUM_SCALAR >::getRefAttr(NodeId id) {
      return *(_referingAttr_[id]);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    const std::vector< std::pair< PRMInstance< GUM_SCALAR >*, std::string > >&
        PRMInstance< GUM_SCALAR >::getRefAttr(NodeId id) const {
      return *(_referingAttr_[id]);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    bool PRMInstance< GUM_SCALAR >::hasRefAttr(NodeId id) const {
      auto p = _referingAttr_.tryGet(id);
      return p && (!(*p)->empty());
    }
 
    template < GUM_Numeric GUM_SCALAR >
    void PRMInstance< GUM_SCALAR >::_copyAttributeCPF_(PRMAttribute< GUM_SCALAR >* attr) {
      const auto& type_attr
          = static_cast< const PRMAttribute< GUM_SCALAR >& >(type().get(attr->safeName()));
      attr->copyCpf(bijection(), type_attr);
      GUM_ASSERT(attr->cpf().contains(attr->type().variable()));
    }
 
  } /* namespace prm */
} /* namespace gum */