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Diffstat (limited to 'qlparser/qtbinaryoperation.hh')
| -rw-r--r-- | qlparser/qtbinaryoperation.hh | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/qlparser/qtbinaryoperation.hh b/qlparser/qtbinaryoperation.hh new file mode 100644 index 0000000..cf15666 --- /dev/null +++ b/qlparser/qtbinaryoperation.hh @@ -0,0 +1,150 @@ +#ifndef _QTBINARYOPERATION_ +#define _QTBINARYOPERATION_ + +#ifndef CPPSTDLIB +#include <ospace/string.h> // STL<ToolKit> +#else +#include <string> +#endif + +#include <stdio.h> + +#include "qlparser/qtoperation.hh" + +/* +* 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: + +The class serves as superclass for all operation classes taking two +arguments. + +*/ + +class QtBinaryOperation : public QtOperation +{ + public: + /// default constructor + QtBinaryOperation(); + + /// constructor getting the node to the parent + QtBinaryOperation( QtNode* node ); + + /// constructor getting pointers to its operands + QtBinaryOperation( QtOperation* input1, QtOperation* input2 ); + + /// virtual destructor + virtual ~QtBinaryOperation(); + + /// simplifies the tree + virtual void simplify(); + + /// test if the two nodes have an equal meaning in the query tree + virtual bool equalMeaning( QtNode* node ); + /** + The meaning of a binary operation is equal, iff both operands have + the same meaning. In case of a commutative operation, the operands + can be switched. + */ + + /// return childs of the node + virtual QtNodeList* getChilds( QtChildType flag ); + + /// creates a unique name for a subexpression + virtual std::string getSpelling(); + + /// test if the edge to the parent node is of type mdd or atomic + virtual QtAreaType getAreaType(); + + /// method for query rewrite + inline virtual void setInput( QtOperation* inputOld, QtOperation* inputNew ); + + /// method for checking idempotency rules +// virtual void checkIdempotency(); + + /// optimizing load access + virtual void optimizeLoad( QtTrimList* trimList ); + /** + The method deletes the given {\tt trimList} and passes the {\tt optimizeLoad} + message with empty triming lists to its input trees. The method is rewritten + by some subclasses. + */ + + /// debugging method + virtual void printTree( int tab, std::ostream& s = std::cout, QtChildType mode = QT_ALL_NODES ); + + //@Man: read/write methods for the operands + //@{ + /// + /// + inline void setInput1( QtOperation* input ); + /// + inline void setInput2( QtOperation* input ); + /// + inline QtOperation* getInput1(); + /// + inline QtOperation* getInput2(); + /// + //@} + + /// returns commutativity information (by default, an operation IS commutative) + virtual bool isCommutative() const; + + protected: + /// method for testing and evaluating the input branches + bool getOperands( QtDataList* inputList, QtData* &operand1, QtData* &operand2 ); + /** + The method checks if the input branches are valid. Then it passes the evaluate message to its two + operands with the {\tt inputList} as argument. The returned results are provided through the arguments + {\tt operand1} and {\tt operand2} called by reference. The method returns {\tt true} it the operands are + valid, otherwise {\tt false}. + */ + + /// method for testing and evaluating the input branches + bool getOperand( QtDataList* inputList, QtData* &operand1, int number); + /** + The method checks if the by number specified input branch si valid. Then it passes the evaluate message to the + operand with the {\tt inputList} as argument. The returned result are provided through the argument + {\tt operand} called by reference. The method returns {\tt true} it the operand is + valid, otherwise {\tt false}. + */ + + /// first operation operand + QtOperation* input1; + /// second operation operand + QtOperation* input2; +}; + +#include "qlparser/qtbinaryoperation.icc" + +#endif + + |