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// file : odb/database.txx
// copyright : Copyright (c) 2009-2013 Code Synthesis Tools CC
// license : GNU GPL v2; see accompanying LICENSE file
#include <odb/section.hxx>
#include <odb/exceptions.hxx>
#include <odb/no-op-cache-traits.hxx>
#include <odb/pointer-traits.hxx>
namespace odb
{
template <typename T>
result<T> database::
query (const odb::query<T>& q, bool cache)
{
// T is always object_type. We also don't need to check for transaction
// here; object_traits::query () does this.
//
result<T> r (query_<T, id_common>::call (*this, q));
if (cache)
r.cache ();
return r;
}
// Implementations (i.e., the *_() functions).
//
template <typename T, database_id DB>
typename object_traits<T>::id_type database::
persist_ (T& obj)
{
// T can be const T while object_type will always be T.
//
typedef typename object_traits<T>::object_type object_type;
typedef object_traits_impl<object_type, DB> object_traits;
object_traits::persist (*this, obj);
typename object_traits::reference_cache_traits::position_type p (
object_traits::reference_cache_traits::insert (
*this, reference_cache_type<T>::convert (obj)));
object_traits::reference_cache_traits::persist (p);
return object_traits::id (obj);
}
template <typename T, database_id DB>
typename object_traits<T>::id_type database::
persist_ (const typename object_traits<T>::pointer_type& pobj)
{
// T can be const T while object_type will always be T.
//
typedef typename object_traits<T>::object_type object_type;
typedef typename object_traits<T>::pointer_type pointer_type;
typedef object_traits_impl<object_type, DB> object_traits;
T& obj (pointer_traits<pointer_type>::get_ref (pobj));
object_traits::persist (*this, obj);
// Get the canonical object pointer and insert it into object cache.
//
typename object_traits::pointer_cache_traits::position_type p (
object_traits::pointer_cache_traits::insert (
*this, pointer_cache_type<pointer_type>::convert (pobj)));
object_traits::pointer_cache_traits::persist (p);
return object_traits::id (obj);
}
template <typename T, database_id DB>
typename object_traits<T>::pointer_type database::
load_ (const typename object_traits<T>::id_type& id)
{
// T is always object_type.
//
typedef typename object_traits<T>::pointer_type pointer_type;
pointer_type r (find_<T, DB> (id));
if (pointer_traits<pointer_type>::null_ptr (r))
throw object_not_persistent ();
return r;
}
template <typename T, database_id DB>
void database::
load_ (const typename object_traits<T>::id_type& id, T& obj)
{
if (!find_<T, DB> (id, obj))
throw object_not_persistent ();
}
template <typename T, database_id DB>
void database::
load_ (T& obj, section& s)
{
connection_type& c (transaction::current ().connection ());
// T is always object_type.
//
if (object_traits_impl<T, DB>::load (c, obj, s))
s.reset (true, false); // Loaded, unchanged.
else
throw section_not_in_object ();
}
template <typename T, database_id DB>
void database::
reload_ (T& obj)
{
// T should be object_type (cannot be const). We also don't need to
// check for transaction here; object_traits::reload () does this.
//
if (!object_traits_impl<T, DB>::reload (*this, obj))
throw object_not_persistent ();
}
template <typename T, database_id DB>
void database::
update_ (const T& obj, const section& s)
{
if (!s.loaded ())
throw section_not_loaded ();
transaction& t (transaction::current ());
// T is always object_type.
//
if (object_traits_impl<T, DB>::update (t.connection (), obj, s))
{
if (s.changed ())
s.reset (true, false, &t); // Clear the change flag.
}
else
throw section_not_in_object ();
}
template <typename T, database_id DB>
struct database::query_<T, DB, class_object>
{
template <typename Q>
static result<T>
call (database& db, const Q& q)
{
return object_traits_impl<T, DB>::query (db, q);
}
};
template <typename T, database_id DB>
struct database::query_<T, DB, class_view>
{
template <typename Q>
static result<T>
call (database& db, const Q& q)
{
return view_traits_impl<T, DB>::query (db, q);
}
};
}
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