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257 lines (221 loc) · 9.42 KB
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#include <map>
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/xml_parser.hpp>
#include <boost/foreach.hpp>
#include <boost/version.hpp>
#include "XmlSerializer.h"
using boost::property_tree::ptree;
using namespace IfcSchema;
static std::map<std::string, std::string> argument_name_map;
// Format an IFC attribute and maybe returns as string. Only literal scalar
// values are converted. Things like entity instances and lists are omitted.
boost::optional<std::string> format_attribute(const Argument* argument, IfcUtil::ArgumentType argument_type) {
boost::optional<std::string> value;
switch(argument_type) {
case IfcUtil::Argument_BOOL: {
const bool b = *argument;
value = b ? "true" : "false";
break; }
case IfcUtil::Argument_DOUBLE: {
const double d = *argument;
std::stringstream stream;
stream << d;
value = stream.str();
break; }
case IfcUtil::Argument_STRING:
case IfcUtil::Argument_ENUMERATION: {
value = static_cast<std::string>(*argument);
break; }
case IfcUtil::Argument_INT: {
const int v = *argument;
std::stringstream stream;
stream << v;
value = stream.str();
break; }
case IfcUtil::Argument_ENTITY: {
IfcUtil::IfcBaseClass* e = *argument;
if (Type::IsSimple(e->type())) {
IfcUtil::IfcBaseType* f = (IfcUtil::IfcBaseType*) e;
value = format_attribute(f->getArgument(0), f->getArgumentType(0));
} else if (e->is(IfcSchema::Type::IfcSIUnit) || e->is(IfcSchema::Type::IfcConversionBasedUnit)) {
// Some string concatenation to have a unit name as a XML attribute.
std::string unit_name;
if (e->is(IfcSchema::Type::IfcSIUnit)) {
IfcSchema::IfcSIUnit* unit = (IfcSchema::IfcSIUnit*) e;
unit_name = IfcSchema::IfcSIUnitName::ToString(unit->Name());
if (unit->hasPrefix()) {
unit_name = IfcSchema::IfcSIPrefix::ToString(unit->Prefix()) + unit_name;
}
} else {
IfcSchema::IfcConversionBasedUnit* unit = (IfcSchema::IfcConversionBasedUnit*) e;
unit_name = unit->Name();
}
for (std::string::iterator c = unit_name.begin(); c != unit_name.end(); ++c) *c = tolower(*c);
value = unit_name;
}
break; }
}
return value;
}
// Formats an entity instances as a ptree node, and insert into the DOM. Recurses
// over the entity attributes and writes them as xml attributes of the node.
ptree& format_entity_instance(IfcUtil::IfcBaseEntity* instance, ptree& tree, bool as_link = false) {
ptree child;
const unsigned n = instance->getArgumentCount();
for (unsigned i = 0; i < n; ++i) {
const Argument* argument = instance->getArgument(i);
if (argument->isNull()) continue;
std::string argument_name = instance->getArgumentName(i);
std::map<std::string, std::string>::const_iterator argument_name_it;
argument_name_it = argument_name_map.find(argument_name);
if (argument_name_it != argument_name_map.end()) {
argument_name = argument_name_it->second;
}
const IfcUtil::ArgumentType argument_type = instance->getArgumentType(i);
boost::optional<std::string> value;
try {
value = format_attribute(argument, argument_type);
} catch (...) {}
if (value) {
if (as_link) {
if (argument_name == "id") {
child.put("<xmlattr>.xlink:href", std::string("#") + *value);
}
} else {
std::stringstream stream;
stream << "<xmlattr>." << argument_name;
child.put(stream.str(), *value);
}
}
}
return tree.add_child(Type::ToString(instance->type()), child);
}
// A function to be called recursively. Template specialization is used
// to descend into decomposition, containment and property relationships.
template <typename A>
void descend(A* instance, ptree& tree) {
format_entity_instance(instance, tree);
}
// Returns related entity instances using IFC's objectified relationship
// model. The second and third argument require a member function pointer.
template <typename T, typename U, typename V, typename F, typename G>
typename V::list::ptr get_related(T* t, F f, G g) {
typename U::list::ptr li = (*t.*f)()->template as<U>();
typename V::list::ptr acc(new typename V::list);
for (typename U::list::it it = li->begin(); it != li->end(); ++it) {
U* u = *it;
acc->push((*u.*g)());
}
return acc;
}
// Descends into the tree by recursing into IfcRelContainedInSpatialStructure,
// IfcRelDecomposes and IfcRelDefinesByProperties relations.
template <>
void descend(IfcProduct* product, ptree& tree) {
ptree& child = format_entity_instance(product, tree);
if (product->is(Type::IfcSpatialStructureElement)) {
IfcSpatialStructureElement* structure = (IfcSpatialStructureElement*) product;
IfcProduct::list::ptr elements = get_related
<IfcSpatialStructureElement, IfcRelContainedInSpatialStructure, IfcProduct>
(structure, &IfcSpatialStructureElement::ContainsElements, &IfcRelContainedInSpatialStructure::RelatedElements);
for (IfcProduct::list::it it = elements->begin(); it != elements->end(); ++it) {
descend(*it, child);
}
}
IfcObjectDefinition::list::ptr structures = get_related
<IfcProduct, IfcRelDecomposes, IfcObjectDefinition>
(product, &IfcProduct::IsDecomposedBy, &IfcRelDecomposes::RelatedObjects);
for (IfcObjectDefinition::list::it it = structures->begin(); it != structures->end(); ++it) {
IfcObjectDefinition* ob = *it;
if (ob->is(Type::IfcSpatialStructureElement)) {
descend((IfcProduct*)ob, child);
} else {
descend(ob, child);
}
}
IfcPropertySetDefinition::list::ptr property_sets = get_related
<IfcProduct, IfcRelDefinesByProperties, IfcPropertySetDefinition>
(product, &IfcProduct::IsDefinedBy, &IfcRelDefinesByProperties::RelatingPropertyDefinition);
for (IfcPropertySetDefinition::list::it it = property_sets->begin(); it != property_sets->end(); ++it) {
IfcPropertySetDefinition* pset = *it;
if (pset->is(Type::IfcPropertySet)) {
format_entity_instance(pset, child, true);
}
}
}
// Descends into the tree by recursing into IfcRelDecomposes relations.
template <>
void descend(IfcProject* project, ptree& tree) {
ptree& child = format_entity_instance(project, tree);
IfcObjectDefinition::list::ptr structures = get_related
<IfcProject, IfcRelDecomposes, IfcObjectDefinition>
(project, &IfcProject::IsDecomposedBy, &IfcRelDecomposes::RelatedObjects);
for (IfcObjectDefinition::list::it it = structures->begin(); it != structures->end(); ++it) {
IfcObjectDefinition* ob = *it;
if (ob->is(Type::IfcSpatialStructureElement)) {
descend((IfcProduct*)ob, child);
} else {
descend(ob, child);
}
}
}
// Format IfcProperty instances and insert into the DOM. IfcComplexProperties are flattened out.
void format_properties(IfcProperty::list::ptr properties, ptree& node) {
for (IfcProperty::list::it it = properties->begin(); it != properties->end(); ++it) {
IfcProperty* p = *it;
if (p->is(Type::IfcComplexProperty)) {
IfcComplexProperty* complex = (IfcComplexProperty*) p;
format_properties(complex->HasProperties(), node);
} else {
format_entity_instance(p, node);
}
}
}
void XmlSerializer::finalize() {
argument_name_map.insert(std::make_pair("GlobalId", "id"));
IfcProject::list::ptr projects = file->entitiesByType<IfcProject>();
if (projects->size() != 1) {
Logger::Message(Logger::LOG_ERROR, "Expected a single IfcProject");
return;
}
IfcProject* project = *projects->begin();
ptree root, header, decomposition, properties;
// Write the SPF header as XML nodes.
BOOST_FOREACH(const std::string& s, file->header().file_description().description()) {
header.add_child("file_description.description", ptree(s));
}
BOOST_FOREACH(const std::string& s, file->header().file_name().author()) {
header.add_child("file_name.author", ptree(s));
}
BOOST_FOREACH(const std::string& s, file->header().file_name().organization()) {
header.add_child("file_name.organization", ptree(s));
}
BOOST_FOREACH(const std::string& s, file->header().file_schema().schema_identifiers()) {
header.add_child("file_schema.schema_identifiers", ptree(s));
}
header.put("file_description.implementation_level", file->header().file_description().implementation_level());
header.put("file_name.name", file->header().file_name().name());
header.put("file_name.time_stamp", file->header().file_name().time_stamp());
header.put("file_name.preprocessor_version", file->header().file_name().preprocessor_version());
header.put("file_name.originating_system", file->header().file_name().originating_system());
header.put("file_name.authorization", file->header().file_name().authorization());
// Descend into the decomposition structure of the IFC file.
descend(project, decomposition);
// Write all property sets and values as XML nodes.
IfcPropertySet::list::ptr psets = file->entitiesByType<IfcPropertySet>();
for (IfcPropertySet::list::it it = psets->begin(); it != psets->end(); ++it) {
IfcPropertySet* pset = *it;
ptree& node = format_entity_instance(pset, properties);
format_properties(pset->HasProperties(), node);
}
root.add_child("ifc.header", header);
root.add_child("ifc.properties", properties);
root.add_child("ifc.decomposition", decomposition);
root.put("ifc.<xmlattr>.xmlns:xlink", "http://www.w3.org/1999/xlink");
#if BOOST_VERSION >= 105600
boost::property_tree::xml_writer_settings<ptree::key_type> settings = boost::property_tree::xml_writer_make_settings<ptree::key_type>('\t', 1);
#else
boost::property_tree::xml_writer_settings<char> settings('\t', 1);
#endif
boost::property_tree::write_xml(xml_filename, root, std::locale(), settings);
}