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Work on a C++ representation of the parsed EXPRESS schema
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/********************************************************************************
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* *
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* This file is part of IfcOpenShell. *
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* *
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* IfcOpenShell is free software: you can redistribute it and/or modify *
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* it under the terms of the Lesser GNU General Public License as published by *
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* the Free Software Foundation, either version 3.0 of the License, or *
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* (at your option) any later version. *
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* *
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* IfcOpenShell is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* Lesser GNU General Public License for more details. *
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* *
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* You should have received a copy of the Lesser GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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* *
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********************************************************************************/
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#ifndef IFCSCHEMA_H
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#define IFCSCHEMA_H
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#include <string>
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#include <vector>
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#include <algorithm>
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class declaration;
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class type_declaration;
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class select_type;
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class enumeration_type;
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class entity;
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class parameter_type {
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};
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class named_type : public parameter_type {
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protected:
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declaration* declared_type_;
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public:
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named_type(declaration* declared_type)
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: declared_type_(declared_type) {}
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declaration* declared_type() const { return declared_type_; }
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};
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class simple_type : public parameter_type {
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public:
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typedef enum { binary_type, boolean_type, integer_type, logical_type, number_type, real_type, string_type } data_type;
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protected:
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data_type declared_type_;
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public:
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simple_type(data_type declared_type)
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: declared_type_(declared_type) {}
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data_type declared_type() const { return declared_type_; }
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};
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class aggregation_type : public parameter_type {
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public:
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typedef enum { array_type, bag_type, list_type, set_type } aggregate_type;
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protected:
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aggregate_type type_of_aggregation_;
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int bound1_, bound2_;
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parameter_type* type_of_element_;
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public:
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aggregation_type(aggregate_type type_of_aggregation, int bound1, int bound2, parameter_type* type_of_element)
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: type_of_aggregation_(type_of_aggregation)
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, bound1_(bound1)
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, bound2_(bound2)
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, type_of_element_(type_of_element)
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{}
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aggregate_type type_of_aggregation() const { type_of_aggregation_; }
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int bound1() const { return bound1_; }
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int bound2() const { return bound2_; }
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parameter_type* type_of_element() const { return type_of_element_; }
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};
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class declaration {
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protected:
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std::string name_;
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public:
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declaration(const std::string& name)
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: name_(name) {}
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const std::string& name() const { return name_; }
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virtual const type_declaration* as_type_declaration() const { return static_cast<type_declaration*>(0); }
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virtual const select_type* as_select_type() const { return static_cast<select_type*>(0); }
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virtual const enumeration_type* as_enumeration_type() const { return static_cast<enumeration_type*>(0); }
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virtual const entity* as_entity() const { return static_cast<entity*>(0); }
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};
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class type_declaration : public declaration {
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protected:
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const parameter_type* declared_type_;
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public:
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type_declaration(const std::string& name, const parameter_type* declared_type)
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: declaration(name)
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, declared_type_(declared_type) {}
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const parameter_type* declared_type() const { return declared_type_; }
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virtual const type_declaration* as_type_declaration() const { return this; }
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};
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class select_type : public declaration {
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protected:
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std::vector<const declaration*> select_list_;
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public:
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select_type(const std::string& name, const std::vector<const declaration*>& select_list)
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: declaration(name)
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, select_list_(select_list) {}
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const std::vector<const declaration*>& select_list() const { return select_list_; }
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virtual const select_type* as_select_type() const { return this; }
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};
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class enumeration_type : public declaration {
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protected:
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std::vector<std::string> enumeration_items_;
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public:
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enumeration_type(const std::string& name, const std::vector<std::string>& enumeration_items)
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: declaration(name)
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, enumeration_items_(enumeration_items) {}
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const std::vector<std::string>& enumeration_items() const { return enumeration_items_; }
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virtual const enumeration_type* as_enumeration_type() const { return this; }
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};
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class entity : public declaration {
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public:
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class attribute {
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protected:
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std::string name_;
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const parameter_type* type_of_attribute_;
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bool optional_;
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public:
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attribute(const std::string& name, parameter_type* type_of_attribute, bool optional)
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: name_(name)
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, type_of_attribute_(type_of_attribute)
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, optional_(optional) {}
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const std::string& name() const { return name_; }
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const parameter_type* type_of_attribute() const { return type_of_attribute_; }
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bool optional() const { return optional_; }
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};
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protected:
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const entity* supertype_; /* NB: IFC explicitly allows only single inheritance */
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std::vector<const entity*> subtypes_;
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std::vector<const attribute*> attributes_;
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std::vector<bool> derived_;
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public:
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entity(const std::string& name, entity* supertype)
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: declaration(name)
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, supertype_(supertype)
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{}
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void set_subtypes(const std::vector<const entity*>& subtypes) {
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subtypes_ = subtypes;
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}
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void set_attributes(const std::vector<const attribute*>& attributes, const std::vector<bool>& derived) {
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attributes_ = attributes;
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derived_ = derived;
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}
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const std::vector<const entity*>& subtypes() const { return subtypes_; }
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const std::vector<const attribute*>& attributes() const { return attributes_; }
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const std::vector<bool>& derived() const { return derived_; }
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const std::vector<const attribute*> all_attributes() const {
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std::vector<const attribute*> attrs;
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attrs.reserve(derived_.size());
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std::vector<const attribute*>::iterator it = attrs.begin();
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if (supertype_) {
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const std::vector<const attribute*> supertype_attrs = supertype_->all_attributes();
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it = std::copy(supertype_attrs.begin(), supertype_attrs.end(), it);
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}
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std::copy(attributes_.begin(), attributes_.end(), it);
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return attrs;
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}
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virtual const entity* as_entity() const { return this; }
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};
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class schema_definition {
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private:
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std::string name_;
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std::vector<const declaration*> declarations_;
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std::vector<const type_declaration*> type_declarations_;
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std::vector<const select_type*> select_types_;
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std::vector<const enumeration_type*> enumeration_types_;
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class declaration_by_name_cmp : public std::binary_function<const declaration*, const std::string&, bool> {
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public:
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bool operator()(const declaration* decl, const std::string& name) {
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return decl->name() < name;
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}
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};
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public:
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schema_definition(const std::string& name, const std::vector<const declaration*>& declarations)
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: name_(name)
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, declarations_(declarations)
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{
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for (std::vector<const declaration*>::const_iterator it = declarations_.begin(); it != declarations_.end(); ++it) {
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if ((**it).as_type_declaration()) type_declarations_.push_back((**it).as_type_declaration());
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if ((**it).as_select_type()) select_types_.push_back((**it).as_select_type());
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if ((**it).as_enumeration_type()) enumeration_types_.push_back((**it).as_enumeration_type());
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}
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}
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~schema_definition() {
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for (std::vector<const declaration*>::const_iterator it = declarations_.begin(); it != declarations_.end(); ++it) {
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delete *it;
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}
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}
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const declaration* declaration_by_name(const std::string& name) {
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std::vector<const declaration*>::const_iterator it = std::lower_bound(declarations_.begin(), declarations_.end(), name, declaration_by_name_cmp());
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if (it == declarations_.end() || (**it).name() != name) {
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throw;
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} else {
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return *it;
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}
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}
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const std::vector<const declaration*>& declarations() { return declarations_; }
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const std::vector<const type_declaration*>& type_declarations() { return type_declarations_; }
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const std::vector<const select_type*>& select_types() { return select_types_; }
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const std::vector<const enumeration_type*>& enumeration_types() { return enumeration_types_; }
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};
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#endif
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