--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Core/SQLite/StatementReference.cpp	Thu Jul 19 14:32:22 2012 +0200
@@ -0,0 +1,116 @@
+/**
+ * Palantir - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012 Medical Physics Department, CHU of Liege,
+ * Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "StatementReference.h"
+
+#include "../PalantirException.h"
+
+#include <cassert>
+#include "sqlite3.h"
+
+namespace Palantir
+{
+  namespace SQLite
+  {
+    bool StatementReference::IsRoot() const
+    {
+      return root_ == NULL;
+    }
+
+    StatementReference::StatementReference()
+    {
+      root_ = NULL;
+      refCount_ = 0;
+      statement_ = NULL;
+      assert(IsRoot());
+    }
+
+    StatementReference::StatementReference(sqlite3* database,
+                                           const char* sql)
+    {
+      if (database == NULL || sql == NULL)
+      {
+        throw PalantirException(ErrorCode_ParameterOutOfRange);
+      }
+
+      root_ = NULL;
+      refCount_ = 0;
+
+      int error = sqlite3_prepare_v2(database, sql, -1, &statement_, NULL);
+      if (error != SQLITE_OK)
+      {
+        throw PalantirException("SQLite: " + std::string(sqlite3_errmsg(database)));
+      }
+
+      assert(IsRoot());
+    }
+
+    StatementReference::StatementReference(StatementReference& other)
+    {
+      refCount_ = 0;
+
+      if (other.IsRoot())
+      {
+        root_ = &other;
+      }
+      else
+      {
+        root_ = other.root_;
+      }
+
+      root_->refCount_++;
+      statement_ = root_->statement_;
+
+      assert(!IsRoot());
+    }
+
+    StatementReference::~StatementReference()
+    {
+      if (IsRoot())
+      {
+        if (refCount_ != 0)
+        {
+          // There remain references to this object
+          throw PalantirException(ErrorCode_InternalError);
+        }
+        else if (statement_ != NULL)
+        {
+          sqlite3_finalize(statement_);
+        }
+      }
+      else
+      {
+        if (root_->refCount_ == 0)
+        {
+          throw PalantirException(ErrorCode_InternalError);
+        }
+        else
+        {
+          root_->refCount_--;
+        }
+      }
+    }
+
+    uint32_t StatementReference::GetReferenceCount() const
+    {
+      return refCount_;
+    }
+  }
+}