MSFeedParse.h

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// # MSFeedParse.h: Classes to hold results from feed grammar parser
// # Copyright (C) 2015
// # 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: casa-feedback@nrao.edu.
// #        Postal address: AIPS++ Project Office
// #                        National Radio Astronomy Observatory
// #                        520 Edgemont Road
// #                        Charlottesville, VA 22903-2475 USA
 
#ifndef MS_MSFEEDPARSE_H
#define MS_MSFEEDPARSE_H
 
// # Includes
#include <casacore/casa/aips.h>
#include <casacore/ms/MSSel/MSParse.h>
#include <casacore/ms/MSSel/MSSelectionErrorHandler.h>
#include <casacore/casa/Arrays/Matrix.h>
 
namespace casacore {  // # NAMESPACE CASACORE - BEGIN
 
// # Forward Declarations
 
// <summary>
// Class to hold values from feed grammar parser
// </summary>
 
// <use visibility=local>
 
// <reviewed reviewer="" date="" tests="">
// </reviewed>
 
// <prerequisite>
// # Classes you should understand before using this one.
// </prerequisite>
 
// <etymology>
// MSFeedParse is the class used to parse a feed command.
// </etymology>
 
// <synopsis>
// MSFeedParse is used by the parser of feed sub-expression statements.
// The parser is written in Bison and Flex in files MSFeedGram.yy and .ll.
// The statements there use the routines in this file to act
// upon a reduced rule.
// Since multiple tables can be given (with a shorthand), the table
// names are stored in a list. The variable names can be qualified
// by the table name and will be looked up in the appropriate table.
//
// The class MSFeedParse only contains information about a table
// used in the table command. Global variables (like a list and a vector)
// are used in MSFeedParse.cc to hold further information.
//
// Global functions are used to operate on the information.
// The main function is the global function msFeedCommand.
// It executes the given STaQL command and returns the resulting ms.
// This is, in fact, the only function to be used by a user.
// </synopsis>
 
// <motivation>
// It is necessary to be able to give a ms command in ASCII.
// This can be used in a CLI or in the table browser to get a subset
// of a table or to sort a table.
// </motivation>
 
// # <todo asof="$DATE:$">
// # A List of bugs, limitations, extensions or planned refinements.
// # </todo>
 
class MSFeedParse : public MSParse {
 public:
  // Define the operator types (&&&, &&, and &).
  // NB: Keeping the same notation as Antenna parser, even tho not a baseline here!
  enum BaselineListType { AutoCorrOnly = 0, AutoCorrAlso, CrossOnly };
 
  // Default constructor
  MSFeedParse();
 
  // Associate the ms.
  MSFeedParse(const MeasurementSet* ms);
 
  MSFeedParse(const MSFeed& feedSubTable, const TableExprNode& feed1AsTEN,
              const TableExprNode& feed2AsTEN);
 
  ~MSFeedParse() {
    column1AsTEN_p = TableExprNode();
    column2AsTEN_p = TableExprNode();
  }
 
  // Add the given feed selection.
  const TableExprNode* selectFeedIds(const Vector<Int>& feedIds,
                                     BaselineListType baselineType = CrossOnly,
                                     Bool negate = False);
 
  // Add the given "baseline" selection.
  const TableExprNode* selectFeedIds(const Vector<Int>& feedIds1, const Vector<Int>& feedIds2,
                                     BaselineListType baselineType = CrossOnly,
                                     Bool negate = False);
 
  // Get a pointer to the table expression node object.
  TableExprNode node() const { return node_p; }
  const Vector<Int>& selectedFeed1() const { return feed1List; }
  const Vector<Int>& selectedFeed2() const { return feed2List; }
  const Matrix<Int>& selectedFeedPairs() const { return feedPairList; }
 
  MSFeed& subTable() { return msSubTable_p; }
 
 private:
  const TableExprNode* setTEN(TableExprNode& condition, BaselineListType baselineType = CrossOnly,
                              Bool negate = False);
  void makeFeedPairList(const Vector<Int>& f1, const Vector<Int>& f2, Matrix<Int>& fp,
                        BaselineListType baselineType = CrossOnly, Bool negate = False);
  void makeFeedList(Vector<Int>& feedList, const Vector<Int>& thisList, Bool negate = False);
  Bool addFeedPair(const Matrix<Int>& feedpairlist, const Int feed1, const Int feed2,
                   BaselineListType baselineType = CrossOnly);
 
  // # Data members.
 public:
  static MSFeedParse* thisMSFParser;
  static std::shared_ptr<MSSelectionErrorHandler> thisMSFErrorHandler;
  static void cleanupErrorHandler() { thisMSFErrorHandler.reset(); }
 
 private:
  TableExprNode node_p;
  const String colName1, colName2;
  Vector<Int> feed1List, feed2List;
  Matrix<Int> feedPairList;
  MSFeed msSubTable_p;
  static TableExprNode column1AsTEN_p, column2AsTEN_p;
};
 
}  // namespace casacore
 
#endif