Initial support for prepared queries

1 files changed, 65 insertions, 0 deletions

diff --git a/odb/prepared-query.hxx b/odb/prepared-query.hxx
new file mode 100644
index 0000000..60ae48d
--- /dev/null
+++ b/odb/prepared-query.hxx
@@ -0,0 +1,65 @@
+// file      : odb/prepared-query.hxx
+// copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_PREPARED_QUERY_HXX
+#define ODB_PREPARED_QUERY_HXX
+
+#include <odb/pre.hxx>
+
+#include <odb/forward.hxx>
+#include <odb/traits.hxx>
+#include <odb/result.hxx>
+
+#include <odb/details/export.hxx>
+#include <odb/details/shared-ptr.hxx>
+
+namespace odb
+{
+  struct LIBODB_EXPORT prepared_query_impl: details::shared_base
+  {
+    virtual
+    ~prepared_query_impl ();
+
+    const char* name;
+    details::shared_ptr<result_impl> (*execute) (prepared_query_impl&);
+  };
+
+  template <typename T>
+  struct prepared_query
+  {
+    result<T>
+    execute (bool cache = true)
+    {
+      typedef
+      typename result_base<T, class_traits<T>::kind>::result_impl_type
+      derived_type;
+
+      details::shared_ptr<result_impl> ri (impl_->execute (*impl_));
+      result<T> r (
+        details::shared_ptr<derived_type> (
+          static_cast<derived_type*> (ri.release ())));
+
+      if (cache)
+        r.cache ();
+
+      return r;
+    }
+
+    explicit
+    prepared_query (details::shared_ptr<prepared_query_impl> impl)
+        : impl_ (impl) {}
+
+  private:
+    details::shared_ptr<prepared_query_impl> impl_;
+  };
+
+  namespace core
+  {
+    using odb::prepared_query;
+  }
+}
+
+#include <odb/post.hxx>
+
+#endif // ODB_PREPARED_QUERY_HXX