refs #649, added flags amd configuration class for caching strategies of DB data

(use cache? TTL? ...)

src/blackmisc/db/dbflags.cpp

@@ -0,0 +1,52 @@
+/* Copyright (C) 2015
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#include "blackmisc/db/dbflags.h"
+#include "blackmisc/verify.h"
+
+#include <QStringList>
+#include <QtGlobal>
+
+namespace BlackMisc
+{
+    namespace Db
+    {
+        QString CDbFlags::flagToString(CDbFlags::DataRetrievalModeFlag flag)
+        {
+            switch (flag)
+            {
+            case Unspecified: return "Unspecified";
+            case DbDirect: return "Direct DB access";
+            case Shared: return "Shared data";
+            case Cached: return "Cached data";
+            default:
+                BLACK_VERIFY_X(false, Q_FUNC_INFO, "wrong flags");
+                return "wrong flags";
+            }
+        }
+
+        QString CDbFlags::flagToString(BlackMisc::Db::CDbFlags::DataRetrievalMode flag)
+        {
+            QStringList list;
+            if (flag.testFlag(Unspecified)) list << "Unspecified";
+            if (flag.testFlag(DbDirect)) list << "Direct DB access";
+            if (flag.testFlag(Shared)) list << "Shared data";
+            if (flag.testFlag(Cached)) list << "Cached data";
+            return list.join(',');
+        }
+
+        void CDbFlags::registerMetadata()
+        {
+            // this is no value class and I register enums here,
+            // that's why I do not use the Mixins
+            qRegisterMetaType<CDbFlags::DataRetrievalModeFlag>();
+            qRegisterMetaType<CDbFlags::DataRetrievalMode>();
+        }
+    } // namespace
+} // namespace