MSFieldParse.h

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// # MSFieldParse.h: Classes to hold results from field grammar parser
// # Copyright (C) 1994,1995,1997,1998,1999,2000,2001,2003
// # 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_MSFIELDPARSE_H
#define MS_MSFIELDPARSE_H
 
// # Includes
#include <casacore/casa/aips.h>
#include <casacore/ms/MeasurementSets/MSField.h>
#include <casacore/ms/MeasurementSets/MSFieldColumns.h>
#include <casacore/ms/MSSel/MSParse.h>
#include <casacore/ms/MSSel/MSSelectionError.h>
#include <casacore/ms/MSSel/MSSelectableTable.h>
namespace casacore {  // # NAMESPACE CASACORE - BEGIN
 
// # Forward Declarations
 
// <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>
 
// <summary>
// Class to hold values from field grammar parser
// </summary>
 
// <use visibility=local>
 
// <reviewed reviewer="" date="" tests="">
// </reviewed>
 
// <prerequisite>
// # Classes you should understand before using this one.
// </prerequisite>
 
// <etymology>
// MSFieldParse is the class used to parse a field command.
// </etymology>
 
// <synopsis>
// MSFieldParse is used by the parser of field sub-expression statements.
// The parser is written in Bison and Flex in files MSFieldGram.y and .l.
// The statements in 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 MSFieldParse only contains information about a table
// used in the table command. Global variables (like a list and a vector)
// are used in MSFieldParse.cc to hold further information.
//
// Global functions are used to operate on the information.
// The main function is the global function msFieldCommand.
// 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>
 
class MSFieldParse : public MSParse {
 public:
  // Default constructor
  MSFieldParse();
  MSFieldParse(const MeasurementSet* ms);
  MSFieldParse(const MSField& fieldSubTable, const TableExprNode& columnAsTEN);
  ~MSFieldParse() { columnAsTEN_p = TableExprNode(); }
 
  const TableExprNode* selectFieldIds(const Vector<Int>& fieldIds);
 
  // Get table expression node object.
  static const TableExprNode* node();
  static MSFieldParse* thisMSFParser;
  static Vector<Int> selectedIDs() { return idList; }
  static void reset();
  static void cleanup() {
    if (node_p) delete node_p;
    node_p = 0x0;
  }
  MSField& subTable() { return msFieldSubTable_p; }
 
 private:
  static TableExprNode* node_p;
  const String colName;
  static Vector<Int> idList;
  MSField msFieldSubTable_p;
  static TableExprNode columnAsTEN_p;
};
 
}  // namespace casacore
 
#endif
 
//---------------------OLD CODE START (Feb. 2012)-------------------
// #ifndef MS_MSFIELDPARSE_H
// #define MS_MSFIELDPARSE_H
 
// //# Includes
// #include <casacore/ms/MSSel/MSParse.h>
// #include <casacore/ms/MSSel/MSSelectionError.h>
// #include <casacore/ms/MSSel/MSSelectableTable.h>
// namespace casacore { //# NAMESPACE CASACORE - BEGIN
 
//   //# Forward Declarations
 
//   // <summary>
//   // Class to hold values from field grammar parser
//   // </summary>
 
//   // <use visibility=local>
 
//   // <reviewed reviewer="" date="" tests="">
//   // </reviewed>
 
//   // <prerequisite>
//   //# Classes you should understand before using this one.
//   // </prerequisite>
 
//   // <etymology>
//   // MSFieldParse is the class used to parse a field command.
//   // </etymology>
 
//   // <synopsis>
//   // MSFieldParse is used by the parser of field sub-expression statements.
//   // The parser is written in Bison and Flex in files MSFieldGram.y and .l.
//   // The statements in 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 MSFieldParse only contains information about a table
//   // used in the table command. Global variables (like a list and a vector)
//   // are used in MSFieldParse.cc to hold further information.
//   //
//   // Global functions are used to operate on the information.
//   // The main function is the global function msFieldCommand.
//   // 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 MSFieldParse : public MSParse
//   {
 
//   public:
//     // Default constructor
//     MSFieldParse ();
//     //  ~MSFieldParse() {idList.resize(0);}
//     // Associate the ms and the shorthand.
//     MSFieldParse (const MeasurementSet* ms);
//     MSFieldParse (MSSelectableTable* msLike);
//     //~MSFieldParse() {if (node_p) delete node_p;node_p=0x0;}
 
//     const TableExprNode *selectFieldIds(const Vector<Int>& fieldIds);
//     //    const TableExprNode *selectFieldOrSource(const String& fieldName);
 
//     // Get table expression node object.
//     static const TableExprNode* node();
//     static MSFieldParse* thisMSFParser;
//     static Vector<Int> selectedIDs() {return idList;}
//     static void reset();//{idList.resize(0);}
//     static void cleanup() {if (node_p) delete node_p;node_p=0x0;}
//   private:
//     static TableExprNode* node_p;
//     const String colName;
//     static  Vector<Int> idList;
 
//   };
 
// } //# NAMESPACE CASACORE - END
 
// #endif
//---------------------OLD CODE END (Feb. 2012)-------------------