From 5daaa1a6d9c8f5d3a4ad3d7009df564bc6506424 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Sat, 6 Nov 2010 18:00:43 +0200
Subject: Add support for container persistence

Generalize statements that were used for persisting objects to work for
both objects and containers. Implement a cache for container statements.
---
 odb/mysql/object-statements.hxx | 185 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 185 insertions(+)
 create mode 100644 odb/mysql/object-statements.hxx

(limited to 'odb/mysql/object-statements.hxx')

diff --git a/odb/mysql/object-statements.hxx b/odb/mysql/object-statements.hxx
new file mode 100644
index 0000000..a16af88
--- /dev/null
+++ b/odb/mysql/object-statements.hxx
@@ -0,0 +1,185 @@
+// file      : odb/mysql/object-statements.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2005-2010 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_MYSQL_OBJECT_STATEMENTS_HXX
+#define ODB_MYSQL_OBJECT_STATEMENTS_HXX
+
+#include <odb/pre.hxx>
+
+#include <odb/forward.hxx>
+#include <odb/traits.hxx>
+
+#include <odb/mysql/mysql.hxx>
+#include <odb/mysql/version.hxx>
+#include <odb/mysql/statement.hxx>
+
+#include <odb/details/shared-ptr.hxx>
+
+#include <odb/mysql/details/export.hxx>
+
+namespace odb
+{
+  namespace mysql
+  {
+    class connection;
+
+    class LIBODB_MYSQL_EXPORT object_statements_base:
+      public details::shared_base
+    {
+    public:
+      virtual
+      ~object_statements_base ();
+
+    protected:
+      object_statements_base (connection& conn)
+          : conn_ (conn)
+      {
+      }
+
+    protected:
+      connection& conn_;
+    };
+
+    template <typename T>
+    class object_statements: public object_statements_base
+    {
+    public:
+      typedef odb::object_traits<T> object_traits;
+      typedef typename object_traits::image_type image_type;
+      typedef typename object_traits::id_image_type id_image_type;
+
+      typedef
+      typename object_traits::container_statement_cache_type
+      container_statement_cache_type;
+
+      typedef mysql::insert_statement persist_statement_type;
+      typedef mysql::select_statement find_statement_type;
+      typedef mysql::update_statement update_statement_type;
+      typedef mysql::delete_statement erase_statement_type;
+
+      object_statements (connection&);
+
+      image_type&
+      image ()
+      {
+        return image_;
+      }
+
+      binding&
+      image_binding ()
+      {
+        return image_binding_;
+      }
+
+      my_bool*
+      image_error ()
+      {
+        return image_error_;
+      }
+
+      id_image_type&
+      id_image ()
+      {
+        return id_image_;
+      }
+
+      binding&
+      id_image_binding ()
+      {
+        return id_image_binding_;
+      }
+
+      persist_statement_type&
+      persist_statement ()
+      {
+        if (persist_ == 0)
+          persist_.reset (
+            new (details::shared) persist_statement_type (
+              conn_, object_traits::persist_statement, image_binding_));
+
+        return *persist_;
+      }
+
+      find_statement_type&
+      find_statement ()
+      {
+        if (find_ == 0)
+          find_.reset (
+            new (details::shared) find_statement_type (
+              conn_,
+              object_traits::find_statement,
+              id_image_binding_,
+              image_binding_));
+
+        return *find_;
+      }
+
+      update_statement_type&
+      update_statement ()
+      {
+        if (update_ == 0)
+          update_.reset (
+            new (details::shared) update_statement_type (
+              conn_,
+              object_traits::update_statement,
+              id_image_binding_,
+              image_binding_));
+
+        return *update_;
+      }
+
+      erase_statement_type&
+      erase_statement ()
+      {
+        if (erase_ == 0)
+          erase_.reset (
+            new (details::shared) erase_statement_type (
+              conn_,
+              object_traits::erase_statement,
+              id_image_binding_));
+
+        return *erase_;
+      }
+
+      // Container statement cache.
+      //
+      container_statement_cache_type&
+      container_statment_cache ()
+      {
+        return container_statement_cache_;
+      }
+
+    private:
+      object_statements (const object_statements&);
+      object_statements& operator= (const object_statements&);
+
+    private:
+      container_statement_cache_type container_statement_cache_;
+
+      // The last element is the id parameter. The update statement
+      // depends on this being one contiguous arrays.
+      //
+      MYSQL_BIND image_bind_[object_traits::column_count + 1];
+
+      image_type image_;
+      my_bool image_error_[object_traits::column_count];
+      binding image_binding_;
+
+      id_image_type id_image_;
+      binding id_image_binding_;
+
+      details::shared_ptr<persist_statement_type> persist_;
+      details::shared_ptr<find_statement_type> find_;
+      details::shared_ptr<update_statement_type> update_;
+      details::shared_ptr<erase_statement_type> erase_;
+    };
+  }
+}
+
+#include <odb/mysql/object-statements.txx>
+
+#include <odb/post.hxx>
+
+#endif // ODB_MYSQL_OBJECT_STATEMENTS_HXX
-- 
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