static std::list<TYPE> extractFromList( api::object value ) {
std::list<TYPE> retList;
for( Py_ssize_t i = 0; i < PyList_Size( value.ptr() ); i++ ) {
retList.push_back( convert( api::object( handle<>( borrowed( PyList_GetItem( value.ptr(), i ) ) ) ) ).as<TYPE>() );
}
return retList;
}
inline extract<T>::extract(api::object const& o)
: base(o.ptr())
{
}
/** @short Convert a python object into the Deska::Db::Value */
Value Py_2_DeskaDbValue(const api::object &o)
{
// None
if (o == api::object())
return Value();
// string
extract<std::string> get_str(o);
if (get_str.check())
return NonOptionalValue(get_str());
// set<string>
extract<std::set<std::string> > get_str_set(o);
if (get_str_set.check())
return NonOptionalValue(get_str_set());
// bool
// This check has to be performed using low-level Python functions to prevent boost::python from treating ints as bools and vice versa.
// An alternative is a project-wide define, which is not exactly an etalon of elegance.
// See http://boost.2283326.n4.nabble.com/Avoiding-implicit-boost-python-extract-lt-gt-conversions-td3433520.html for details
if (PyBool_Check(o.ptr())) {
extract<bool> get_bool(o);
BOOST_ASSERT(get_bool.check());
return NonOptionalValue(get_bool());
}
// int
extract<int> get_int(o);
if (get_int.check())
return NonOptionalValue(get_int());
// double
extract<double> get_double(o);
if (get_double.check())
return NonOptionalValue(get_double());
// IPv4 address
extract<boost::asio::ip::address_v4> get_ipv4(o);
if (get_ipv4.check())
return NonOptionalValue(get_ipv4());
// IPv6 address
extract<boost::asio::ip::address_v6> get_ipv6(o);
if (get_ipv6.check())
return NonOptionalValue(get_ipv6());
// MAC address
extract<MacAddress> get_mac(o);
if (get_mac.check())
return NonOptionalValue(get_mac());
// boost::posix_time::ptime
extract<boost::posix_time::ptime> get_ptime(o);
if (get_ptime.check())
return NonOptionalValue(get_ptime());
// boost::gregorian::date
extract<boost::gregorian::date> get_date(o);
if (get_date.check())
return NonOptionalValue(get_date());
throw std::runtime_error("Unsupported type of a python object");
}
