/usr/include/casacore/tables/TaQL/TaQLNodeVisitor.h is in casacore-dev 2.2.0-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 | //# TaQLNodeVisitor.h: Class to visit the nodes in the raw TaQL parse tree
//# Copyright (C) 2005
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library 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 Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: aips2-request@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//#
//# $Id$
#ifndef TABLES_TAQLNODEVISITOR_H
#define TABLES_TAQLNODEVISITOR_H
//# Includes
#include <casacore/casa/aips.h>
#include <casacore/tables/TaQL/TaQLNode.h>
#include <casacore/tables/TaQL/TaQLNodeDer.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
// <summary>
// Class to visit the nodes in the raw TaQL parse tree.
// </summary>
// <use visibility=local>
// <reviewed reviewer="" date="" tests="tTableGram">
// </reviewed>
// <prerequisite>
//# Classes you should understand before using this one.
// <li> <linkto class=TaQLNode>TaQLNode</linkto>
// <li> Note 199 describing
// <a href="../notes/199.html">
// TaQL</a>
// </prerequisite>
// <synopsis>
// TaQLNodeVisitor is the abstract base class for classes that want to
// visit a TaQLNode tree, i.e. traverse the tree.
// Each visit results in a TaQLNodeResult object which acts as the basis
// for the actual result object.
// <br>
// A specialization of TaQLNodeVisitor (e.g. class
// <linkto class=TaQLNodeHandler>TaQLNodeHandler</linkto> needs to implement
// the various visitXXNode functions. A visit function will process a node
// which usually means visiting its children, etc..
// </synopsis>
// <motivation>
// The visitor design pattern separates the tree from the way it is processed.
// In this way any handler can be created. For instance, a query optimizer
// could be a future other handler.
// </motivation>
class TaQLNodeVisitor
{
public:
virtual ~TaQLNodeVisitor();
// Define the functions to visit each node type.
// <group>
virtual TaQLNodeResult visitConstNode (const TaQLConstNodeRep& node) = 0;
virtual TaQLNodeResult visitRegexNode (const TaQLRegexNodeRep& node) = 0;
virtual TaQLNodeResult visitUnaryNode (const TaQLUnaryNodeRep& node) = 0;
virtual TaQLNodeResult visitBinaryNode (const TaQLBinaryNodeRep& node) = 0;
virtual TaQLNodeResult visitMultiNode (const TaQLMultiNodeRep& node) = 0;
virtual TaQLNodeResult visitFuncNode (const TaQLFuncNodeRep& node) = 0;
virtual TaQLNodeResult visitRangeNode (const TaQLRangeNodeRep& node) = 0;
virtual TaQLNodeResult visitIndexNode (const TaQLIndexNodeRep& node) = 0;
virtual TaQLNodeResult visitKeyColNode (const TaQLKeyColNodeRep& node) = 0;
virtual TaQLNodeResult visitTableNode (const TaQLTableNodeRep& node) = 0;
virtual TaQLNodeResult visitColNode (const TaQLColNodeRep& node) = 0;
virtual TaQLNodeResult visitColumnsNode (const TaQLColumnsNodeRep& node) = 0;
virtual TaQLNodeResult visitJoinNode (const TaQLJoinNodeRep& node) = 0;
virtual TaQLNodeResult visitGroupNode (const TaQLGroupNodeRep& node) = 0;
virtual TaQLNodeResult visitSortKeyNode (const TaQLSortKeyNodeRep& node) = 0;
virtual TaQLNodeResult visitSortNode (const TaQLSortNodeRep& node) = 0;
virtual TaQLNodeResult visitLimitOffNode (const TaQLLimitOffNodeRep& node) = 0;
virtual TaQLNodeResult visitGivingNode (const TaQLGivingNodeRep& node) = 0;
virtual TaQLNodeResult visitUpdExprNode (const TaQLUpdExprNodeRep& node) = 0;
virtual TaQLNodeResult visitSelectNode (const TaQLSelectNodeRep& node) = 0;
virtual TaQLNodeResult visitUpdateNode (const TaQLUpdateNodeRep& node) = 0;
virtual TaQLNodeResult visitInsertNode (const TaQLInsertNodeRep& node) = 0;
virtual TaQLNodeResult visitDeleteNode (const TaQLDeleteNodeRep& node) = 0;
virtual TaQLNodeResult visitCountNode (const TaQLCountNodeRep& node) = 0;
virtual TaQLNodeResult visitCalcNode (const TaQLCalcNodeRep& node) = 0;
virtual TaQLNodeResult visitCreTabNode (const TaQLCreTabNodeRep& node) = 0;
virtual TaQLNodeResult visitColSpecNode (const TaQLColSpecNodeRep& node) = 0;
virtual TaQLNodeResult visitRecFldNode (const TaQLRecFldNodeRep& node) = 0;
virtual TaQLNodeResult visitUnitNode (const TaQLUnitNodeRep& node) = 0;
virtual TaQLNodeResult visitAltTabNode (const TaQLAltTabNodeRep& node) = 0;
virtual TaQLNodeResult visitAddColNode (const TaQLAddColNodeRep& node) = 0;
virtual TaQLNodeResult visitSetKeyNode (const TaQLSetKeyNodeRep& node) = 0;
virtual TaQLNodeResult visitRenDropNode (const TaQLRenDropNodeRep& node) = 0;
virtual TaQLNodeResult visitAddRowNode (const TaQLAddRowNodeRep& node) = 0;
virtual TaQLNodeResult visitConcTabNode (const TaQLConcTabNodeRep& node) = 0;
virtual TaQLNodeResult visitShowNode (const TaQLShowNodeRep& node) = 0;
// </group>
protected:
// A convenience function to visit the given node using this visitor.
TaQLNodeResult visitNode (const TaQLNode& node)
{ return node.visit (*this); }
};
} //# NAMESPACE CASACORE - END
#endif
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