refs #445, value objects and containers

* common base class for DB based classes
* common base class for DB based containers
* Livery, distributor value class
* adjusted value classes to livery
* utility functions for DB values (blackmisc free functions)
* register new objects with metadata system

src/blackmisc/datastoreutility.cpp

@@ -0,0 +1,31 @@
+/* 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/datastoreutility.h"
+#include "blackmisc/blackmiscfreefunctions.h"
+
+namespace BlackMisc
+{
+    bool CDatastoreUtility::dbBoolStringToBool(const QString &dbBool)
+    {
+        return BlackMisc::stringToBool(dbBool);
+    }
+
+    int CDatastoreUtility::extractIntegerKey(const QString &stringWithKey)
+    {
+        int i1 = stringWithKey.lastIndexOf('(');
+        if (i1 < 0) { return -1; }
+        int i2 = stringWithKey.lastIndexOf(')');
+        if (i2 <= i1 + 1) { return -1;}
+        QString n(stringWithKey.mid(i1 + 1, i2 - i1 - 1));
+        bool ok = false;
+        int key = n.toInt(&ok);
+        return ok ? key : -1;
+    }
+} // namespace