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authorBoris Kolpackov <boris@codesynthesis.com>2011-09-06 16:54:06 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2011-09-06 16:54:06 +0200
commit1b1cb92a27592da6ab9300b2c5c8384f7588e2af (patch)
tree2c4a92f14c303ff3aaced4e7b073f7180c0c5d6a /odb/sqlite/view-result.txx
parent7d3f2b0badf4298bca53936d22a0a22c74538713 (diff)
Support for views; native part
Diffstat (limited to 'odb/sqlite/view-result.txx')
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+// file : odb/sqlite/view-result.txx
+// author : Boris Kolpackov <boris@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/exceptions.hxx>
+
+#include <odb/sqlite/view-statements.hxx>
+
+namespace odb
+{
+ namespace sqlite
+ {
+ template <typename T>
+ result_impl<T, class_view>::
+ ~result_impl ()
+ {
+ }
+
+ template <typename T>
+ result_impl<T, class_view>::
+ result_impl (const query& q,
+ details::shared_ptr<select_statement> statement,
+ view_statements<view_type>& statements)
+ : base_type (statements.connection ().database ()),
+ result_impl_base (q, statement),
+ statements_ (statements)
+ {
+ }
+
+ template <typename T>
+ void result_impl<T, class_view>::
+ load (view_type& view)
+ {
+ // The image can grow between calls to load() as a result of other
+ // statements execution.
+ //
+ typename view_traits::image_type& im (statements_.image ());
+
+ if (im.version != statements_.image_version ())
+ {
+ binding& b (statements_.image_binding ());
+ view_traits::bind (b.bind, im);
+ statements_.image_version (im.version);
+ b.version++;
+ }
+
+ select_statement::result r (statement_->load ());
+
+ if (r == select_statement::truncated)
+ {
+ if (view_traits::grow (im, statements_.image_truncated ()))
+ im.version++;
+
+ if (im.version != statements_.image_version ())
+ {
+ binding& b (statements_.image_binding ());
+ view_traits::bind (b.bind, im);
+ statements_.image_version (im.version);
+ b.version++;
+ statement_->reload ();
+ }
+ }
+
+ odb::database& db (this->database ());
+
+ view_traits::callback (db, view, callback_event::pre_load);
+ view_traits::init (view, im);
+ view_traits::callback (db, view, callback_event::post_load);
+ }
+
+ template <typename T>
+ void result_impl<T, class_view>::
+ next ()
+ {
+ this->current (pointer_type ());
+
+ if (!statement_->next ())
+ this->end_ = true;
+ }
+
+ template <typename T>
+ void result_impl<T, class_view>::
+ cache ()
+ {
+ }
+
+ template <typename T>
+ std::size_t result_impl<T, class_view>::
+ size ()
+ {
+ throw result_not_cached ();
+ }
+ }
+}