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+// 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 ();
+ }
+ }
+}