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+#ifndef _QTMDDACCESS_
+#define _QTMDDACCESS_
+
+#include "qlparser/qtoncstream.hh"
+
+#ifndef CPPSTDLIB
+#include <ospace/string.h> // STL<ToolKit>
+#else
+#include <string>
+#endif
+
+// forward declarations
+class MDDColl;
+class MDDCollIter;
+
+/*
+* This file is part of rasdaman community.
+*
+* Rasdaman community 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.
+*
+* Rasdaman community 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 rasdaman community. If not, see <http://www.gnu.org/licenses/>.
+*
+* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
+rasdaman GmbH.
+*
+* For more information please see <http://www.rasdaman.org>
+* or contact Peter Baumann via <baumann@rasdaman.com>.
+*/
+/*************************************************************
+ *
+ *
+ * COMMENTS:
+ *
+ ************************************************************/
+
+//@ManMemo: Module: {\bf qlparser}
+
+/*@Doc:
+
+This class encapsulates a MDDCollection. It gives access to the elements
+through the ONC protocol. The list returned by next() consists of just one
+element.
+
+*/
+
+class QtMDDAccess : public QtONCStream
+{
+ public:
+ /// constructor getting the collection name if no iterator name is specified
+ QtMDDAccess( const std::string& collectionName );
+
+ /// constructor getting collection and iterator name
+ QtMDDAccess( const std::string& collectionName, const std::string& iteratorName );
+
+ /// destructor
+ virtual ~QtMDDAccess();
+
+ //@Man: Operations of the ONC protocol
+ //@{
+ ///
+ void open();
+ ///
+ QtDataList* next();
+ ///
+ void close();
+ ///
+ void reset();
+ //@}
+
+ /// prints the tree
+ virtual void printTree( int tab, std::ostream& s = std::cout, QtChildType mode = QT_ALL_NODES );
+
+ /// prints the algebraic expression
+ virtual void printAlgebraicExpression( std::ostream& s = std::cout );
+
+ /// method for identification of nodes
+ inline virtual const QtNodeType getNodeType() const;
+
+ /// method for retrieving the current MDD collection
+ inline MDDColl* getMDDColl();
+
+ /// type checking
+ virtual const QtTypeTuple& checkType();
+
+ private:
+ /// name of the MDD collection
+ std::string collectionName;
+
+ /// name of the iterator
+ std::string iteratorName;
+
+ /// pointer to the MDD collection
+ MDDColl* mddColl;
+
+ /// pointer to the curent iterator
+ MDDCollIter* mddIter;
+
+ /// attribute for identification of nodes
+ static const QtNodeType nodeType;
+};
+
+#include "qlparser/qtmddaccess.icc"
+
+#endif
+