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Diffstat (limited to 'qlparser/qtiterator.hh')
-rw-r--r-- | qlparser/qtiterator.hh | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/qlparser/qtiterator.hh b/qlparser/qtiterator.hh new file mode 100644 index 0000000..d2fad41 --- /dev/null +++ b/qlparser/qtiterator.hh @@ -0,0 +1,118 @@ +/* +* 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>. +*/ +#ifndef _QTITERATOR_ +#define _QTITERATOR_ + +#include "qlparser/qtoncstream.hh" + +#include <vector> + +/************************************************************* + * + * + * COMMENTS: + * + ************************************************************/ + +//@ManMemo: Module: {\bf qlparser} + +/*@Doc: + +It is super class for every class capable of iterating over collections of MDD. +It has a list of inputs of type QtONCStream, so every instance of type +QtONCStream or of a subtype of it can serve as an input stream for a QtIterator +object. The input streams can be combined differently, as cross product of the +inputs in class QtSelectionIterator or as simple tupels in the order they occure +in the input streams in class QtOperationIterator. + +*/ + +class QtIterator : public QtONCStream +{ + public: + /// list of QtONCStream objects + typedef std::vector<QtONCStream*> QtONCStreamList; + + /// default constructor + QtIterator(); + + /// constructor getting a pointer to the parent + QtIterator( QtNode* node ); + + /// destructor + virtual ~QtIterator(); + + /// return childs of the node + virtual QtNodeList* getChilds( QtChildType flag ); + + /// 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 ); + + //@Man: Operations of the ONC protocol + //@{ + /// + virtual void open(); + /// + virtual void close(); + /// + virtual void reset(); + //@} + + //@Man: Read/Write methods: + //@{ + /// + inline void setStreamInputs( QtONCStreamList* inputs ); + + /// Returns inputs + QtONCStreamList* getStreamInputs(); + /// exchange the stream input {\tt oldInput} with {\tt newInput} + void setStreamInput( QtONCStream* oldInput, QtONCStream* newInput ); + /// + //inline virtual void setParents(); + //@} + + /// pre optimization + //virtual void preOptimize(); + /** + Pre-Optimization step is passed to the input streams. + */ + + /// get input type tuple + void getInputTypeTuple( QtTypeTuple& typeTuple ); + + protected: + /// list of input streams + QtONCStreamList* inputs; + + private: + /// atribute for identification of nodes + static const QtNodeType nodeType; +}; + +#include "qlparser/qtiterator.icc" + +#endif + |