/usr/include/odb/database.txx is in libodb-dev 2.4.0-1build1.
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// copyright : Copyright (c) 2009-2015 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, bool = object_traits<T>::auto_id> struct persist_type;
template <typename T> struct persist_type<T, true> {typedef T type;};
template <typename T> struct persist_type<T, false> {typedef const T type;};
template <typename I, typename T, database_id DB>
void database::
persist_ (I b, I e, bool cont, details::meta::no /*ptr*/)
{
// 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;
multiple_exceptions mex (typeid (object_already_persistent));
try
{
while (b != e && (cont || mex.empty ()))
{
std::size_t n (0);
T* a[object_traits::batch]; // T instead of persist_type for cache.
for (; b != e && n < object_traits::batch; ++n)
{
// Compiler error pointing here? Perhaps the passed range is
// of const objects?
//
typename persist_type<object_type>::type* p (&(*b++));
a[n] = const_cast<T*> (p);
}
// Compiler error pointing here? Perhaps the object or the
// database does not support bulk operations?
//
object_traits::persist (
*this,
const_cast<typename persist_type<object_type>::type**> (a),
n,
mex);
if (mex.fatal ())
break;
for (std::size_t i (0); i < n; ++i)
{
if (mex[i] != 0) // Don't cache objects that have failed.
continue;
mex.current (i); // Set position in case the below code throws.
typename object_traits::reference_cache_traits::position_type p (
object_traits::reference_cache_traits::insert (
*this, reference_cache_type<T>::convert (*a[i])));
object_traits::reference_cache_traits::persist (p);
}
mex.delta (n);
}
}
catch (const odb::exception& ex)
{
mex.insert (ex, true);
}
if (!mex.empty ())
{
mex.prepare ();
throw mex;
}
}
template <typename P>
struct pointer_copy
{
const P* ref;
P copy;
void assign (const P& p) {ref = &p;}
template <typename P1> void assign (const P1& p1)
{
// The passed pointer should be the same or implicit-convertible
// to the object pointer. This way we make sure the object pointer
// does not assume ownership of the passed object.
//
const P& p (p1);
copy = p;
ref = ©
}
};
template <typename I, typename T, database_id DB>
void database::
persist_ (I b, I e, bool cont, details::meta::yes /*ptr*/)
{
// 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;
multiple_exceptions mex (typeid (object_already_persistent));
try
{
while (b != e && (cont || mex.empty ()))
{
std::size_t n (0);
typename persist_type<object_type>::type* a[object_traits::batch];
pointer_copy<pointer_type> p[object_traits::batch];
for (; b != e && n < object_traits::batch; ++n)
{
p[n].assign (*b++);
a[n] = &pointer_traits<pointer_type>::get_ref (*p[n].ref);
}
// Compiler error pointing here? Perhaps the object or the
// database does not support bulk operations?
//
object_traits::persist (*this, a, n, mex);
if (mex.fatal ())
break;
for (std::size_t i (0); i < n; ++i)
{
if (mex[i] != 0) // Don't cache objects that have failed.
continue;
mex.current (i); // Set position in case the below code throws.
// Get the canonical object pointer and insert it into object cache.
//
typename object_traits::pointer_cache_traits::position_type pos (
object_traits::pointer_cache_traits::insert (
*this, pointer_cache_type<pointer_type>::convert (*p[i].ref)));
object_traits::pointer_cache_traits::persist (pos);
}
mex.delta (n);
}
}
catch (const odb::exception& ex)
{
mex.insert (ex, true);
}
if (!mex.empty ())
{
mex.prepare ();
throw mex;
}
}
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 I, database_id DB>
void database::
update_ (I b, I e, bool cont)
{
// Sun CC with non-standard STL does not have iterator_traits.
//
#ifndef _RWSTD_NO_CLASS_PARTIAL_SPEC
typedef typename std::iterator_traits<I>::value_type value_type;
#else
// Assume iterator is just a pointer.
//
typedef typename object_pointer_traits<I>::object_type value_type;
#endif
// object_pointer_traits<T>::object_type can be const.
//
typedef object_pointer_traits<value_type> opt;
typedef
typename object_traits<typename opt::object_type>::object_type
object_type;
typedef object_traits_impl<object_type, DB> object_traits;
multiple_exceptions mex (
object_traits::managed_optimistic_column_count == 0
? typeid (object_not_persistent)
: typeid (object_changed));
try
{
while (b != e && (cont || mex.empty ()))
{
std::size_t n (0);
const object_type* a[object_traits::batch];
for (; b != e && n < object_traits::batch; ++n)
a[n] = &opt::get_ref (*b++);
// Compiler error pointing here? Perhaps the object or the
// database does not support bulk operations?
//
object_traits::update (*this, a, n, mex);
if (mex.fatal ())
break;
mex.delta (n);
}
}
catch (const odb::exception& ex)
{
mex.insert (ex, true);
}
if (!mex.empty ())
{
mex.prepare ();
throw mex;
}
}
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 I, typename T, database_id DB>
void database::
erase_id_ (I b, I e, bool cont)
{
// T is explicitly specified by the caller, so assume it is object type.
//
typedef T object_type;
typedef object_traits_impl<object_type, DB> object_traits;
typedef typename object_traits::id_type id_type;
multiple_exceptions mex (typeid (object_not_persistent));
try
{
while (b != e && (cont || mex.empty ()))
{
std::size_t n (0);
const id_type* a[object_traits::batch];
for (; b != e && n < object_traits::batch; ++n)
// Compiler error pointing here? Perhaps the object id type
// and the range element type don't match?
//
a[n] = &(*b++);
// Compiler error pointing here? Perhaps the object or the
// database does not support bulk operations?
//
object_traits::erase (*this, a, n, mex);
if (mex.fatal ())
break;
mex.delta (n);
}
}
catch (const odb::exception& ex)
{
mex.insert (ex, true);
}
if (!mex.empty ())
{
mex.prepare ();
throw mex;
}
}
template <typename I, database_id DB>
void database::
erase_object_ (I b, I e, bool cont)
{
// Sun CC with non-standard STL does not have iterator_traits.
//
#ifndef _RWSTD_NO_CLASS_PARTIAL_SPEC
typedef typename std::iterator_traits<I>::value_type value_type;
#else
// Assume iterator is just a pointer.
//
typedef typename object_pointer_traits<I>::object_type value_type;
#endif
// object_pointer_traits<T>::object_type can be const.
//
typedef object_pointer_traits<value_type> opt;
typedef
typename object_traits<typename opt::object_type>::object_type
object_type;
typedef object_traits_impl<object_type, DB> object_traits;
multiple_exceptions mex (
object_traits::managed_optimistic_column_count == 0
? typeid (object_not_persistent)
: typeid (object_changed));
try
{
while (b != e && (cont || mex.empty ()))
{
std::size_t n (0);
const object_type* a[object_traits::batch];
for (; b != e && n < object_traits::batch; ++n)
a[n] = &opt::get_ref (*b++);
// Compiler error pointing here? Perhaps the object or the
// database does not support bulk operations?
//
object_traits::erase (*this, a, n, mex);
if (mex.fatal ())
break;
mex.delta (n);
}
}
catch (const odb::exception& ex)
{
mex.insert (ex, true);
}
if (!mex.empty ())
{
mex.prepare ();
throw mex;
}
}
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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