From 2b856f69d490f6cedffac03ecbed8fef318ecc43 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 5 Feb 2013 15:50:06 +0200
Subject: Add support for change-tracking containers

ODB now supports "smart" ordered containers. Such containers get extra
functions for updating and deleting individual elements. Based on this
functionality implement two change-tracking containers: odb::vector
(equivalent to std::vector) and QOdbList (equivalent to QList). New
tests: common/container/change-tracking and qt/common/container/change-
tracking.
---
 odb/vector-traits.hxx | 104 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 odb/vector-traits.hxx

(limited to 'odb/vector-traits.hxx')

diff --git a/odb/vector-traits.hxx b/odb/vector-traits.hxx
new file mode 100644
index 0000000..874480b
--- /dev/null
+++ b/odb/vector-traits.hxx
@@ -0,0 +1,104 @@
+// file      : odb/vector-traits.hxx
+// copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_VECTOR_TRAITS_HXX
+#define ODB_VECTOR_TRAITS_HXX
+
+#include <odb/pre.hxx>
+
+#include <odb/vector.hxx>
+#include <odb/vector-impl.hxx>
+#include <odb/container-traits.hxx>
+#include <odb/transaction.hxx>
+
+namespace odb
+{
+  template <typename V, typename A>
+  class access::container_traits<vector<V, A> >
+  {
+  public:
+    static const container_kind kind = ck_ordered;
+    static const bool smart = true;
+
+    typedef vector<V, A> container_type;
+
+    typedef V value_type;
+    typedef typename container_type::size_type index_type;
+
+    typedef smart_ordered_functions<index_type, value_type> functions;
+    typedef ordered_functions<index_type, value_type> dumb_functions;
+
+  public:
+    static void
+    persist (const container_type& c, const functions& f)
+    {
+      for (index_type i (0), n (c.size ()); i < n; ++i)
+        f.insert (i, c[i]);
+
+      // Now that this container is persistent, start tracking changes.
+      //
+      c._start ();
+    }
+
+    static void
+    load (container_type& c, bool more, const functions& f)
+    {
+      // Stop tracking changes.
+      //
+      c._stop ();
+
+      // Load.
+      //
+      c.clear ();
+      while (more)
+      {
+        index_type dummy;
+        c.push_back (value_type ());
+        more = f.select (dummy, c.modify_back ());
+      }
+
+      // Start tracking changes.
+      //
+      c._start ();
+    }
+
+    static void
+    update (const container_type&, const functions&);
+
+    static void
+    erase (const container_type* c, const functions& f)
+    {
+      f.delete_ (0);
+
+      // Stop tracking changes.
+      //
+      if (c != 0)
+        c->_stop ();
+    }
+
+    // Version of load() for dumb functions. Used to support
+    // inverse members of the container type. The implementation
+    // is identical to the smart one except we don't turn off/on
+    // change tracking.
+    //
+    static void
+    load (container_type& c, bool more, const dumb_functions& f)
+    {
+      c.clear ();
+
+      while (more)
+      {
+        index_type dummy;
+        c.push_back (value_type ());
+        more = f.select (dummy, c.modify_back ());
+      }
+    }
+  };
+}
+
+#include <odb/vector-traits.txx>
+
+#include <odb/post.hxx>
+
+#endif // ODB_VECTOR_TRAITS_HXX
-- 
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