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Diffstat (limited to 'libodb-sqlite/odb/sqlite/simple-object-result.txx')
-rw-r--r-- | libodb-sqlite/odb/sqlite/simple-object-result.txx | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/libodb-sqlite/odb/sqlite/simple-object-result.txx b/libodb-sqlite/odb/sqlite/simple-object-result.txx new file mode 100644 index 0000000..f27b226 --- /dev/null +++ b/libodb-sqlite/odb/sqlite/simple-object-result.txx @@ -0,0 +1,158 @@ +// file : odb/sqlite/simple-object-result.txx +// license : GNU GPL v2; see accompanying LICENSE file + +#include <cassert> + +#include <odb/callback.hxx> +#include <odb/exceptions.hxx> // result_not_cached + +#include <odb/sqlite/simple-object-statements.hxx> + +namespace odb +{ + namespace sqlite + { + template <typename T> + object_result_impl<T>:: + ~object_result_impl () + { + if (!this->end_) + statement_->free_result (); + } + + template <typename T> + void object_result_impl<T>:: + invalidate () + { + if (!this->end_) + { + statement_->free_result (); + this->end_ = true; + } + + params_.reset (); + statement_.reset (); + } + + template <typename T> + object_result_impl<T>:: + object_result_impl (const query_base& q, + const details::shared_ptr<select_statement>& s, + statements_type& sts, + const schema_version_migration* svm) + : base_type (sts.connection ()), + params_ (q.parameters ()), + statement_ (s), + statements_ (sts), + tc_ (svm) + { + } + + template <typename T> + void object_result_impl<T>:: + load (object_type& obj, bool fetch) + { + if (fetch) + load_image (); + + // This is a top-level call so the statements cannot be locked. + // + assert (!statements_.locked ()); + typename statements_type::auto_lock l (statements_); + + object_traits::callback (this->db_, obj, callback_event::pre_load); + + typename object_traits::image_type& i (statements_.image ()); + tc_.init (obj, i, &this->db_); + + // Initialize the id image and binding and load the rest of the object + // (containers, etc). + // + typename object_traits::id_image_type& idi (statements_.id_image ()); + object_traits::init (idi, object_traits::id (i)); + + 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_, obj, false); + statements_.load_delayed (tc_.version ()); + l.unlock (); + object_traits::callback (this->db_, obj, callback_event::post_load); + } + + template <typename T> + typename object_result_impl<T>::id_type + object_result_impl<T>:: + load_id () + { + load_image (); + return object_traits::id (statements_.image ()); + } + + template <typename T> + void object_result_impl<T>:: + next () + { + this->current (pointer_type ()); + + if (!statement_->next ()) + { + statement_->free_result (); + this->end_ = true; + } + } + + template <typename T> + void object_result_impl<T>:: + load_image () + { + // The image can grow between calls to load() as a result of other + // statements execution. + // + typename object_traits::image_type& im (statements_.image ()); + + if (im.version != statements_.select_image_version ()) + { + binding& b (statements_.select_image_binding ()); + tc_.bind (b.bind, im, statement_select); + statements_.select_image_version (im.version); + b.version++; + } + + select_statement::result r (statement_->load ()); + + if (r == select_statement::truncated) + { + if (tc_.grow (im, statements_.select_image_truncated ())) + im.version++; + + if (im.version != statements_.select_image_version ()) + { + binding& b (statements_.select_image_binding ()); + tc_.bind (b.bind, im, statement_select); + statements_.select_image_version (im.version); + b.version++; + statement_->reload (); + } + } + } + + template <typename T> + void object_result_impl<T>:: + cache () + { + } + + template <typename T> + std::size_t object_result_impl<T>:: + size () + { + throw result_not_cached (); + } + } +} |