diff options
author | Boris Kolpackov <boris@codesynthesis.com> | 2012-04-23 16:48:02 +0200 |
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committer | Boris Kolpackov <boris@codesynthesis.com> | 2012-04-23 16:48:02 +0200 |
commit | 40267e1f40de8ea216688886ab1df1c7ec50e2b2 (patch) | |
tree | 046030dabdd352808c71cf1f2a9bfed706e86c2a /odb/pgsql/simple-object-result.txx | |
parent | 3405fff26a02b5bee51686c5d22200be320b87d8 (diff) |
Polymorphic inheritance support
Diffstat (limited to 'odb/pgsql/simple-object-result.txx')
-rw-r--r-- | odb/pgsql/simple-object-result.txx | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/odb/pgsql/simple-object-result.txx b/odb/pgsql/simple-object-result.txx new file mode 100644 index 0000000..f7b2e1c --- /dev/null +++ b/odb/pgsql/simple-object-result.txx @@ -0,0 +1,142 @@ +// file : odb/pgsql/simple-object-result.txx +// copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC +// license : GNU GPL v2; see accompanying LICENSE file + +#include <cassert> + +#include <odb/callback.hxx> + +#include <odb/pgsql/simple-object-statements.hxx> + +namespace odb +{ + namespace pgsql + { + template <typename T> + object_result_impl<T>:: + ~object_result_impl () + { + if (!this->end_) + statement_->free_result (); + } + + template <typename T> + object_result_impl<T>:: + object_result_impl (const query&, + details::shared_ptr<select_statement> statement, + statements_type& statements) + : base_type (statements.connection ().database ()), + statement_ (statement), + statements_ (statements) + { + } + + 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_); + + 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 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 ()); + object_traits::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 (object_traits::grow (im, statements_.select_image_truncated ())) + im.version++; + + if (im.version != statements_.select_image_version ()) + { + binding& b (statements_.select_image_binding ()); + object_traits::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 () + { + return statement_->result_size (); + } + } +} |