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Diffstat (limited to 'qpid/cpp/src/qpid/store/ms-sql/BlobAdapter.h')
-rw-r--r-- | qpid/cpp/src/qpid/store/ms-sql/BlobAdapter.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/store/ms-sql/BlobAdapter.h b/qpid/cpp/src/qpid/store/ms-sql/BlobAdapter.h new file mode 100644 index 0000000000..1c666392bc --- /dev/null +++ b/qpid/cpp/src/qpid/store/ms-sql/BlobAdapter.h @@ -0,0 +1,62 @@ +#ifndef QPID_STORE_MSSQL_BLOBADAPTER_H +#define QPID_STORE_MSSQL_BLOBADAPTER_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> +#include <qpid/framing/Buffer.h> +#include <qpid/framing/FieldTable.h> + +namespace qpid { +namespace store { +namespace ms_sql { + +/** + * @class BlobAdapter + * + * Adapter for accessing a blob (varbinary SQL field) as a qpid::framing::Buffer + * in an exception-safe way. + */ +class BlobAdapter : public _variant_t { +private: + // This Buffer's pointer indicates whether or not a safearray has + // been locked; if it's 0, no locking was done. + qpid::framing::Buffer buff; + qpid::framing::FieldTable fields; + + void extractBuff(); + +public: + // Initialize with the known length of the data that will come. + // Assigning a _variant_t to this object will set up the array to be + // accessed with the operator Buffer&() + BlobAdapter(long blobSize) : _variant_t(), buff(0, blobSize) {} + ~BlobAdapter(); + BlobAdapter& operator=(_variant_t& var_t_Src) + { _variant_t::operator=(var_t_Src); return *this; } + operator qpid::framing::Buffer& (); + operator qpid::framing::FieldTable& (); +}; + +}}} // namespace qpid::store::ms_sql + +#endif /* QPID_STORE_MSSQL_BLOBADAPTER_H */ |