1 files changed, 64 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/store/ms-sql/BlobAdapter.cpp b/qpid/cpp/src/qpid/store/ms-sql/BlobAdapter.cpp
new file mode 100644
index 0000000000..1889f34e41
--- /dev/null
+++ b/qpid/cpp/src/qpid/store/ms-sql/BlobAdapter.cpp
@@ -0,0 +1,64 @@
+/*
+ *
+ * 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 "BlobAdapter.h"
+#include <qpid/Exception.h>
+
+namespace qpid {
+namespace store {
+namespace ms_sql {
+
+void
+BlobAdapter::extractBuff()
+{
+    // To give a valid Buffer back, lock the safearray, obtaining a pointer to
+    // the actual data. Record the pointer in the Buffer so the destructor
+    // knows to unlock the safearray.
+    if (buff.getPointer() == 0) {
+        char *blob;
+        SafeArrayAccessData(this->parray, (void **)&blob);
+        qpid::framing::Buffer lockedBuff(blob, buff.getSize());
+        buff = lockedBuff;
+    }
+}
+
+
+BlobAdapter::~BlobAdapter()
+{
+    // If buff's pointer is set, the safearray is locked, so unlock it
+    if (buff.getPointer() != 0)
+        SafeArrayUnaccessData(this->parray);
+}
+
+BlobAdapter::operator qpid::framing::Buffer& ()
+{
+    extractBuff();
+    return buff;
+}
+
+BlobAdapter::operator qpid::framing::FieldTable& ()
+{
+    extractBuff();
+    fields.decode(buff);
+    return fields;
+}
+
+}}}  // namespace qpid::store::ms_sql