Как бихте премахнали възел от дървото на свойствата на boost xml?
Имам такъв документ:
<folders>
<folder>some/folder</folder>
<folder>some/folder</folder>
<folder>some/folder</folder>
</folders>
Знам как да повторя и отпечатам всички папки, но как да премахна един от елементите и да запазя xml обратно?
Вероятно бих опитал:
boost::property_tree::ptree pt;
pt.erase(key);
Е, направих го по следния начин:
void Backups::removeGeneric(const std::string key, const std::string value)
{
boost::property_tree::ptree pt;
boost::property_tree::xml_parser::read_xml(Backups::getBackupFile(), pt);
bool remove = true;
try {
pt.get_child(key);
}
catch(boost::exception &ex)
{
std::cout << "There is nothing to remove." << std::endl;
remove = false;
}
if(remove)
{
bool exists = false;
boost::property_tree::ptree newPt;
BOOST_FOREACH(boost::property_tree::ptree::value_type &v, pt.get_child(key))
{
if(v.second.data() != value)
newPt.add("scheme", v.second.data());
if(v.second.data() == value)
exists = true;
}
if(exists)
{
pt.put_child(key, newPt);
boost::property_tree::xml_parser::write_xml(Backups::getBackupFile(), pt);
std::cout << value << " was removed." << std::endl;
}
else
std::cout << value << " is not added." << std::endl;
}
}
