From 9fe985cdce9f0e1f9bee0e3cfc7a834b842f1906 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 5 Sep 2012 14:58:54 +0200
Subject: Support for Qt QUuid persistence

This support was added to the basic sub-profile. New test: qt/common/basic.
Updated the qt example to use QUuid as an object id.
---
 odb/qt/basic/sqlite/default-mapping.hxx |  7 +++
 odb/qt/basic/sqlite/quuid-traits.hxx    | 75 +++++++++++++++++++++++++++++++++
 2 files changed, 82 insertions(+)
 create mode 100644 odb/qt/basic/sqlite/quuid-traits.hxx

(limited to 'odb/qt/basic/sqlite')

diff --git a/odb/qt/basic/sqlite/default-mapping.hxx b/odb/qt/basic/sqlite/default-mapping.hxx
index 1b5296d..bdb19b3 100644
--- a/odb/qt/basic/sqlite/default-mapping.hxx
+++ b/odb/qt/basic/sqlite/default-mapping.hxx
@@ -7,6 +7,7 @@
 
 #include <QtCore/QString>
 #include <QtCore/QByteArray>
+#include <QtCore/QUuid>
 
 // Map QString to SQLite TEXT by default. Allow NULL values by default as
 // QString provides a null representation.
@@ -18,4 +19,10 @@
 //
 #pragma db value(QByteArray) type("BLOB") null
 
+// By default map QUuid to SQLite BLOB and use NULL to represent null UUIDs.
+// If NULL is disabled (e.g., at the member level), then we store the null
+// UUID (i.e., all bytes are zero).
+//
+#pragma db value(QUuid) type("BLOB") null
+
 #endif // ODB_QT_BASIC_SQLITE_DEFAULT_MAPPING_HXX
diff --git a/odb/qt/basic/sqlite/quuid-traits.hxx b/odb/qt/basic/sqlite/quuid-traits.hxx
new file mode 100644
index 0000000..c99a417
--- /dev/null
+++ b/odb/qt/basic/sqlite/quuid-traits.hxx
@@ -0,0 +1,75 @@
+// file      : odb/qt/basic/sqlite/uuid-traits.hxx
+// copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_QT_BASIC_SQLITE_UUID_TRAITS_HXX
+#define ODB_QT_BASIC_SQLITE_UUID_TRAITS_HXX
+
+#include <odb/pre.hxx>
+
+#include <cstring> // std::memcpy
+#include <cassert>
+
+#include <QtCore/QUuid>
+
+#include <odb/sqlite/traits.hxx>
+
+namespace odb
+{
+  namespace sqlite
+  {
+    template <>
+    struct default_value_traits<QUuid, id_blob>
+    {
+      typedef QUuid value_type;
+      typedef value_type query_type;
+      typedef details::buffer image_type;
+
+      static void
+      set_value (value_type& v,
+                 const details::buffer& b,
+                 std::size_t n,
+                 bool is_null)
+      {
+        if (!is_null)
+        {
+          assert (n == 16);
+          std::memcpy (&v.data1, b.data (), 16);
+        }
+        else
+          v = QUuid ();
+      }
+
+      static void
+      set_image (details::buffer& b,
+                 std::size_t& n,
+                 bool& is_null,
+                 const value_type& v)
+      {
+        // If we can, store nil as NULL. Otherwise, store it as a value.
+        //
+        is_null = is_null && v.isNull ();
+
+        if (!is_null)
+        {
+          n = 16;
+
+          if (n > b.capacity ())
+            b.capacity (n);
+
+          std::memcpy (b.data (), &v.data1, n);
+        }
+      }
+    };
+
+    template <>
+    struct default_type_traits<QUuid>
+    {
+      static const database_type_id db_type_id = id_blob;
+    };
+  }
+}
+
+#include <odb/post.hxx>
+
+#endif // ODB_QT_BASIC_SQLITE_UUID_TRAITS_HXX
-- 
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