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// file : odb/polymorphic-object-result.txx
// copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
// license : GNU GPL v2; see accompanying LICENSE file
#include <odb/exceptions.hxx>
namespace odb
{
//
// polymorphic_object_result_impl
//
template <typename T>
polymorphic_object_result_impl<T>::
~polymorphic_object_result_impl ()
{
}
template <typename T>
void polymorphic_object_result_impl<T>::
load ()
{
typedef typename root_traits::pointer_type root_pointer_type;
typedef typename root_traits::pointer_traits root_pointer_traits;
// First check the session.
//
const id_type& id (load_id ());
root_pointer_type rp (
object_traits::pointer_cache_traits::find (database (), id));
if (!root_pointer_traits::null_ptr (rp))
{
// Check if the types match.
//
pointer_type p (
root_pointer_traits::template dynamic_pointer_cast<
object_type> (rp));
if (!pointer_traits::null_ptr (p))
current (p, false); // Pointer from cache should not be guarded.
else
// We have an object in session that has a different type
// compared to the one in the database.
//
throw object_not_persistent (); // @@ type_mismatch?
}
else
// load() is responsible for creating the object of a correct
// dynamic type and for object cache insertion.
//
load (0, false);
}
//
// object_result_iterator
//
template <typename T, typename ID>
void object_result_iterator<T, ID, true>::
load (object_type& obj)
{
if (res_->end ())
return;
typedef odb::object_traits<object_type> object_traits;
typename object_traits::reference_cache_traits::insert_guard ig (
object_traits::reference_cache_traits::insert (
res_->database (), res_->load_id (), obj));
res_->load (&obj, false);
ig.release ();
}
}
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