From 534da0d899b11f6ca1fac161ea8901a62e5c07dc Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 14 Aug 2013 15:16:09 +0200
Subject: Add support for object sections

Sections are an optimization mechanism that allows the partitioning of
data members of a persistent class into groups that can be separately
loaded and/or updated.
---
 odb/sqlite/section-statements.hxx | 182 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 182 insertions(+)
 create mode 100644 odb/sqlite/section-statements.hxx

(limited to 'odb/sqlite/section-statements.hxx')

diff --git a/odb/sqlite/section-statements.hxx b/odb/sqlite/section-statements.hxx
new file mode 100644
index 0000000..3f0d9c4
--- /dev/null
+++ b/odb/sqlite/section-statements.hxx
@@ -0,0 +1,182 @@
+// file      : odb/sqlite/section-statements.hxx
+// copyright : Copyright (c) 2005-2013 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_SQLITE_SECTION_STATEMENTS_HXX
+#define ODB_SQLITE_SECTION_STATEMENTS_HXX
+
+#include <odb/pre.hxx>
+
+#include <cstddef> // std::size_t
+
+#include <odb/forward.hxx>
+#include <odb/traits.hxx>
+
+#include <odb/sqlite/version.hxx>
+#include <odb/sqlite/sqlite-types.hxx>
+#include <odb/sqlite/binding.hxx>
+#include <odb/sqlite/statement.hxx>
+#include <odb/sqlite/details/export.hxx>
+
+namespace odb
+{
+  namespace sqlite
+  {
+    class connection;
+
+    // Template argument is the section traits type.
+    //
+    template <typename T, typename ST>
+    class section_statements
+    {
+    public:
+      typedef ST traits;
+
+      typedef typename traits::image_type image_type;
+
+      typedef sqlite::select_statement select_statement_type;
+      typedef sqlite::update_statement update_statement_type;
+
+      typedef sqlite::connection connection_type;
+
+      section_statements (connection_type&,
+                          image_type&,
+                          binding& id, binding& idv);
+
+      connection_type&
+      connection () {return conn_;}
+
+      image_type&
+      image () {return image_;}
+
+      const binding&
+      id_binding () {return id_binding_;}
+
+      // Id and optimistic concurrency version (if any).
+      //
+      const binding&
+      idv_binding () {return idv_binding_;}
+
+      // Select binding.
+      //
+      std::size_t
+      select_image_version () const { return select_image_version_;}
+
+      void
+      select_image_version (std::size_t v) {select_image_version_ = v;}
+
+      binding&
+      select_image_binding () {return select_image_binding_;}
+
+      bool*
+      select_image_truncated () {return select_image_truncated_;}
+
+      // Update binding.
+      //
+      std::size_t
+      update_image_version () const { return update_image_version_;}
+
+      void
+      update_image_version (std::size_t v) {update_image_version_ = v;}
+
+      std::size_t
+      update_id_binding_version () const { return update_id_binding_version_;}
+
+      void
+      update_id_binding_version (std::size_t v) {update_id_binding_version_ = v;}
+
+      binding&
+      update_image_binding () {return update_image_binding_;}
+
+      //
+      // Statements.
+      //
+
+      select_statement_type&
+      select_statement ()
+      {
+        if (select_ == 0)
+          select_.reset (
+            new (details::shared) select_statement_type (
+              conn_,
+              traits::select_statement,
+              id_binding_,
+              select_image_binding_));
+
+        return *select_;
+      }
+
+      update_statement_type&
+      update_statement ()
+      {
+        if (update_ == 0)
+          update_.reset (
+            new (details::shared) update_statement_type (
+              conn_,
+              traits::update_statement,
+              update_image_binding_));
+
+        return *update_;
+      }
+
+    public:
+      static const std::size_t id_column_count = traits::id_column_count;
+      static const std::size_t managed_optimistic_load_column_count =
+        traits::managed_optimistic_load_column_count;
+      static const std::size_t managed_optimistic_update_column_count =
+        traits::managed_optimistic_update_column_count;
+      static const std::size_t select_column_count = traits::load_column_count;
+      static const std::size_t update_column_count =
+        traits::update_column_count;
+
+    private:
+      section_statements (const section_statements&);
+      section_statements& operator= (const section_statements&);
+
+    protected:
+      connection_type& conn_;
+
+      // These come from object_statements.
+      //
+      image_type& image_;
+      binding& id_binding_;
+      binding& idv_binding_;
+
+      // Select binding.
+      //
+      std::size_t select_image_version_;
+
+      static const std::size_t select_bind_count =
+        select_column_count != 0 || managed_optimistic_load_column_count != 0
+        ? select_column_count + managed_optimistic_load_column_count
+        : 1;
+
+      binding select_image_binding_;
+      bind select_image_bind_[select_bind_count];
+      bool select_image_truncated_[select_bind_count];
+
+      // Update binding.
+      //
+      std::size_t update_image_version_;
+      std::size_t update_id_binding_version_;
+
+      static const std::size_t update_bind_count =
+        update_column_count != 0 || managed_optimistic_update_column_count != 0
+        ? update_column_count + id_column_count +
+          managed_optimistic_update_column_count
+        : 1;
+
+      binding update_image_binding_;
+      bind update_image_bind_[update_bind_count];
+
+      details::shared_ptr<select_statement_type> select_;
+      details::shared_ptr<update_statement_type> update_;
+    };
+  }
+}
+
+#include <odb/sqlite/section-statements.txx>
+
+#include <odb/post.hxx>
+
+#endif // ODB_SQLITE_SECTION_STATEMENTS_HXX
-- 
cgit v1.1