From 851cbe3927b987ec992bbbb69bd62224bf4a0dc3 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 23 Apr 2012 16:48:01 +0200
Subject: Polymorphic inheritance support

---
 odb/sqlite/simple-object-result.txx | 143 ++++++++++++++++++++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 odb/sqlite/simple-object-result.txx

(limited to 'odb/sqlite/simple-object-result.txx')

diff --git a/odb/sqlite/simple-object-result.txx b/odb/sqlite/simple-object-result.txx
new file mode 100644
index 0000000..2152a21
--- /dev/null
+++ b/odb/sqlite/simple-object-result.txx
@@ -0,0 +1,143 @@
+// file      : odb/sqlite/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/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>
+    object_result_impl<T>::
+    object_result_impl (const query& q,
+                        details::shared_ptr<select_statement> statement,
+                        statements_type& statements)
+        : base_type (statements.connection ().database ()),
+          result_impl_base (q, 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 ()
+    {
+      throw result_not_cached ();
+    }
+  }
+}
-- 
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