diff options
author | Boris Kolpackov <boris@codesynthesis.com> | 2011-09-06 16:56:07 +0200 |
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committer | Boris Kolpackov <boris@codesynthesis.com> | 2011-09-06 16:56:07 +0200 |
commit | 7ce07d1c371e32e474897e8b03da7e330aaefb57 (patch) | |
tree | 2ee49af4fc317f189b9b12259fbabf16712cddb4 /odb/pgsql/object-result.txx | |
parent | 3ee1f474f72d093e27974e040372c53342702b12 (diff) |
Support for views; native part
Diffstat (limited to 'odb/pgsql/object-result.txx')
-rw-r--r-- | odb/pgsql/object-result.txx | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/odb/pgsql/object-result.txx b/odb/pgsql/object-result.txx new file mode 100644 index 0000000..f4ee961 --- /dev/null +++ b/odb/pgsql/object-result.txx @@ -0,0 +1,135 @@ +// file : odb/pgsql/object-result.txx +// author : Constantin Michael <constantin@codesynthesis.com> +// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC +// license : GNU GPL v2; see accompanying LICENSE file + +#include <odb/callback.hxx> + +#include <odb/pgsql/object-statements.hxx> + +namespace odb +{ + namespace pgsql + { + template <typename T> + result_impl<T, class_object>:: + ~result_impl () + { + } + + template <typename T> + result_impl<T, class_object>:: + result_impl (const query&, + details::shared_ptr<select_statement> statement, + object_statements<object_type>& statements) + : base_type (statements.connection ().database ()), + statement_ (statement), + statements_ (statements) + { + } + + template <typename T> + void result_impl<T, class_object>:: + load (object_type& obj) + { + load_image (); + + // This is a top-level call so the statements cannot be locked. + // + assert (!statements_.locked ()); + typename object_statements<object_type>::auto_lock l (statements_); + + odb::database& db (this->database ()); + object_traits::callback (db, obj, callback_event::pre_load); + + typename object_traits::image_type& i (statements_.image ()); + object_traits::init (obj, i, 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++; + } + + object_traits::load_ (statements_, obj); + statements_.load_delayed (); + l.unlock (); + object_traits::callback (db, obj, callback_event::post_load); + } + + template <typename T> + typename result_impl<T, class_object>::id_type + result_impl<T, class_object>:: + load_id () + { + load_image (); + return object_traits::id (statements_.image ()); + } + + template <typename T> + void result_impl<T, class_object>:: + next () + { + this->current (pointer_type ()); + + if (!statement_->next ()) + this->end_ = true; + } + + template <typename T> + void result_impl<T, class_object>:: + 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_.out_image_version ()) + { + binding& b (statements_.out_image_binding ()); + object_traits::bind (b.bind, im, true); + statements_.out_image_version (im.version); + b.version++; + } + + select_statement::result r (statement_->load ()); + + if (r == select_statement::truncated) + { + if (object_traits::grow (im, statements_.out_image_truncated ())) + im.version++; + + if (im.version != statements_.out_image_version ()) + { + binding& b (statements_.out_image_binding ()); + object_traits::bind (b.bind, im, true); + statements_.out_image_version (im.version); + b.version++; + statement_->reload (); + } + } + } + + template <typename T> + void result_impl<T, class_object>:: + cache () + { + } + + template <typename T> + std::size_t result_impl<T, class_object>:: + size () + { + return statement_->result_size (); + } + } +} |