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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
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