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Diffstat (limited to 'odb/pgsql/polymorphic-object-result.txx')
-rw-r--r-- | odb/pgsql/polymorphic-object-result.txx | 287 |
1 files changed, 0 insertions, 287 deletions
diff --git a/odb/pgsql/polymorphic-object-result.txx b/odb/pgsql/polymorphic-object-result.txx deleted file mode 100644 index bad2091..0000000 --- a/odb/pgsql/polymorphic-object-result.txx +++ /dev/null @@ -1,287 +0,0 @@ -// file : odb/pgsql/polymorphic-object-result.txx -// license : GNU GPL v2; see accompanying LICENSE file - -#include <cassert> - -#include <odb/callback.hxx> -#include <odb/exceptions.hxx> // object_not_persistent - -#include <odb/pgsql/polymorphic-object-statements.hxx> - -namespace odb -{ - namespace pgsql - { - template <typename T> - polymorphic_object_result_impl<T>:: - ~polymorphic_object_result_impl () - { - if (!this->end_) - statement_->free_result (); - } - - template <typename T> - void polymorphic_object_result_impl<T>:: - invalidate () - { - if (!this->end_) - { - statement_->free_result (); - this->end_ = true; - } - - statement_.reset (); - } - - template <typename T> - polymorphic_object_result_impl<T>:: - polymorphic_object_result_impl (const query_base&, - details::shared_ptr<select_statement> st, - statements_type& sts, - const schema_version_migration* svm) - : base_type (sts.connection ()), - statement_ (st), - statements_ (sts), - tc_ (svm), - count_ (0) - { - } - - template <typename T> - void polymorphic_object_result_impl<T>:: - load (object_type* pobj, bool fetch) - { - if (fetch) - load_image (); - - typename statements_type::root_statements_type& rsts ( - statements_.root_statements ()); - - // This is a top-level call so the statements cannot be locked. - // - assert (!rsts.locked ()); - typename statements_type::auto_lock l (rsts); - - typename object_traits::image_type& i (statements_.image ()); - typename root_traits::image_type& ri (rsts.image ()); - - id_type id (root_traits::id (ri)); - - // Determine this object's dynamic type. - // - typedef typename root_traits::info_type info_type; - discriminator_type d (root_traits::discriminator (ri)); - discriminator_type disc (d); - - // Use the polymorphic_info() helper to get concrete_info if - // object_type is concrete and NULL if it is abstract. - // - const info_type* spi (polymorphic_info (object_traits::info)); - const info_type& pi ( - spi != 0 && spi->discriminator == d - ? *spi - : root_traits::map->find (d)); - - typedef typename root_traits::pointer_type root_pointer_type; - typedef typename root_traits::pointer_traits root_pointer_traits; - - typename object_traits::pointer_cache_traits::insert_guard ig; - - if (pobj == 0) - { - // Need to create a new instance of the dynamic type. - // - root_pointer_type rp (pi.create ()); - pointer_type p ( - root_pointer_traits::template static_pointer_cast<object_type> (rp)); - - // Insert it as a root pointer (for non-unique pointers, rp should - // still be valid and for unique pointers this is a no-op). - // - ig.reset ( - object_traits::pointer_cache_traits::insert (this->db_, id, rp)); - - pobj = &pointer_traits::get_ref (p); - current (p); - } - else - { - // We are loading into an existing instance. If the static and - // dynamic types differ, then make sure the instance is at least - // of the dynamic type. - // - if (&pi != &object_traits::info) - { - const info_type& dpi (root_traits::map->find (typeid (*pobj))); - - if (&dpi != &pi && dpi.derived (pi)) - throw object_not_persistent (); // @@ type_mismatch ? - } - } - - callback_event ce (callback_event::pre_load); - pi.dispatch (info_type::call_callback, this->db_, pobj, &ce); - - tc_.init (*pobj, i, &this->db_); - - // Initialize the id image and binding and load the rest of the object - // (containers, dynamic part, etc). - // - typename object_traits::id_image_type& idi (statements_.id_image ()); - root_traits::init (idi, id); - - binding& idb (statements_.id_image_binding ()); - if (idi.version != statements_.id_image_version () || idb.version == 0) - { - object_traits::bind (idb.bind, idi); - statements_.id_image_version (idi.version); - idb.version++; - } - - tc_.load_ (statements_, *pobj, false); - - // Load the dynamic part of the object unless static and dynamic - // types are the same. - // - if (&pi != &object_traits::info) - { - std::size_t d (object_traits::depth); - pi.dispatch (info_type::call_load, this->db_, pobj, &d); - }; - - rsts.load_delayed (tc_.version ()); - l.unlock (); - - ce = callback_event::post_load; - pi.dispatch (info_type::call_callback, this->db_, pobj, &ce); - object_traits::pointer_cache_traits::load (ig.position ()); - ig.release (); - } - - template <typename T> - typename polymorphic_object_result_impl<T>::id_type - polymorphic_object_result_impl<T>:: - load_id () - { - load_image (); - return root_traits::id (statements_.root_statements ().image ()); - } - - template <typename T> - typename polymorphic_object_result_impl<T>::discriminator_type - polymorphic_object_result_impl<T>:: - load_discriminator () - { - load_image (); - return root_traits::discriminator ( - statements_.root_statements ().image ()); - } - - template <typename T> - void polymorphic_object_result_impl<T>:: - next () - { - this->current (pointer_type ()); - - if (statement_->next ()) - count_++; - else - { - statement_->free_result (); - this->end_ = true; - } - } - - template <typename T, typename R> - struct polymorphic_image_rebind - { - // Derived type version. - // - typedef object_traits_impl<T, id_pgsql> traits; - - static bool - rebind (typename traits::statements_type& sts, - const schema_version_migration* svm) - { - typename traits::image_type& im (sts.image ()); - - if (traits::check_version (sts.select_image_versions (), im)) - { - binding& b (sts.select_image_binding (traits::depth)); - object_traits_calls<T> tc (svm); - tc.bind (b.bind, 0, 0, im, statement_select); - traits::update_version ( - sts.select_image_versions (), im, sts.select_image_bindings ()); - return true; - } - - return false; - } - }; - - template <typename R> - struct polymorphic_image_rebind<R, R> - { - // Root type version. - // - typedef object_traits_impl<R, id_pgsql> traits; - - static bool - rebind (typename traits::statements_type& sts, - const schema_version_migration* svm) - { - typename traits::image_type& im (sts.image ()); - - if (im.version != sts.select_image_version ()) - { - binding& b (sts.select_image_binding ()); - object_traits_calls<R> tc (svm); - tc.bind (b.bind, im, statement_select); - sts.select_image_version (im.version); - b.version++; - return true; - } - - return false; - } - }; - - template <typename T> - void polymorphic_object_result_impl<T>:: - load_image () - { - typedef polymorphic_image_rebind<object_type, root_type> image_rebind; - - // The image can grow between calls to load() as a result of other - // statements execution. - // - image_rebind::rebind (statements_, tc_.version ()); - - select_statement::result r (statement_->load ()); - - if (r == select_statement::truncated) - { - typename object_traits::image_type& im (statements_.image ()); - - if (tc_.grow (im, statements_.select_image_truncated ())) - im.version++; - - if (image_rebind::rebind (statements_, tc_.version ())) - statement_->reload (); - } - } - - template <typename T> - void polymorphic_object_result_impl<T>:: - cache () - { - } - - template <typename T> - std::size_t polymorphic_object_result_impl<T>:: - size () - { - return this->end_ ? count_ : statement_->result_size (); - } - } -} |