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#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 */
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