Initial checkin of portable message store plugin and MS SQL-specific storage provider. Goes with QPID-2017

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk/qpid@827870 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 61 insertions, 0 deletions

diff --git a/cpp/src/qpid/store/ms-sql/VariantHelper.h b/cpp/src/qpid/store/ms-sql/VariantHelper.h
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+++ b/cpp/src/qpid/store/ms-sql/VariantHelper.h
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+#ifndef QPID_STORE_MSSQL_VARIANTHELPER_H
+#define QPID_STORE_MSSQL_VARIANTHELPER_H
+
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+
+#include <comutil.h>
+
+namespace qpid {
+namespace store {
+namespace ms_sql {
+
+/**
+ * @class VariantHelper
+ *
+ * Class template to wrap the details of working with _variant_t objects.
+ */
+template <class Wrapped> class VariantHelper {
+private:
+    _variant_t var;
+
+public:
+    VariantHelper();
+    VariantHelper(const Wrapped &init);
+
+    VariantHelper& operator =(const Wrapped& rhs);
+    operator const _variant_t& () const;
+};
+
+// Specialization for using _variant_t to wrap a std::string
+template<> class VariantHelper<std::string> {
+private:
+    _variant_t var;
+
+public:
+    VariantHelper(const std::string &init);
+    VariantHelper& operator =(const std::string& rhs);
+    operator const _variant_t& () const;
+};
+
+}}}  // namespace qpid::store::ms_sql
+
+#endif /* QPID_STORE_MSSQL_VARIANTHELPER_H */