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authorBoris Kolpackov <boris@codesynthesis.com>2013-02-05 15:50:06 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2013-02-05 15:50:06 +0200
commit2b856f69d490f6cedffac03ecbed8fef318ecc43 (patch)
tree0876ef0d3539bb313a9dd66659e805e6980399aa /odb/vector-traits.hxx
parent20daa3c4285c91dfcd35361f6550f80315e008a5 (diff)
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.
Diffstat (limited to 'odb/vector-traits.hxx')
-rw-r--r--odb/vector-traits.hxx104
1 files changed, 104 insertions, 0 deletions
diff --git a/odb/vector-traits.hxx b/odb/vector-traits.hxx
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+// 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