SDPolarizationHandler.h

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// # SDPolarizationFiller.h: fills the POLARIZATION table for the SDFITS filler
// # Copyright (C) 2000
// # 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_SDPOLARIZATIONHANDLER_H
#define MS_SDPOLARIZATIONHANDLER_H
 
#include <casacore/casa/aips.h>
#include <casacore/casa/Containers/RecordField.h>
#include <casacore/casa/Arrays/ArrayFwd.h>
 
namespace casacore {  // # NAMESPACE CASACORE - BEGIN
 
// # Forward Declarations
class ColumnsIndex;
class MeasurementSet;
class MSPolarization;
class MSPolarizationColumns;
class Record;
 
// <summary>
// </summary>
 
// <use visibility=local>   or   <use visibility=export>
 
// <reviewed reviewer="" date="yyyy/mm/dd" tests="" demos="">
// </reviewed>
 
// <prerequisite>
//   <li> SomeClass
//   <li> SomeOtherClass
//   <li> some concept
// </prerequisite>
//
// <etymology>
// </etymology>
//
// <synopsis>
// </synopsis>
//
// <example>
// </example>
//
// <motivation>
// </motivation>
//
// <templating arg=T>
//    <li>
//    <li>
// </templating>
//
// <thrown>
//    <li>
//    <li>
// </thrown>
//
// <todo asof="yyyy/mm/dd">
//   <li> add this feature
//   <li> fix this bug
//   <li> start discussion of this possible extension
// </todo>
 
class SDPolarizationHandler {
 public:
  // default ctor is not attached to a MS and hence is useless until attached
  SDPolarizationHandler();
 
  // attach this to a MS - no columns are explicitly handled here
  SDPolarizationHandler(MeasurementSet &ms, Vector<Bool> &handledCols, const Record &row);
 
  // copy ctor
  SDPolarizationHandler(const SDPolarizationHandler &other);
 
  ~SDPolarizationHandler() { clearAll(); }
 
  // assignment operator, uses copy semantics
  SDPolarizationHandler &operator=(const SDPolarizationHandler &other);
 
  // attach to a MS, the handledCols and row arguments are ignored here
  void attach(MeasurementSet &ms, Vector<Bool> &handledCols, const Record &row);
 
  // reset internals given indicated row, use the same MS; just resets the id pointer
  void resetRow(const Record &row);
 
  // fill - a new row is added only when necessary
  void fill(const Record &row, const Vector<Int> &stokes);
 
  // get the current polarization ID
  Int polarizationId() { return rownr_p; }
 
 private:
  RecordFieldPtr<Int> numCorrKey_p;
  ColumnsIndex *index_p;
  MSPolarization *msPol_p;
  MSPolarizationColumns *msPolCols_p;
 
  Int rownr_p;
 
  // from a pre-existing MS
  RORecordFieldPtr<Int> numCorrField_p;
  RORecordFieldPtr<Array<Int>> corrTypeField_p, corrProductField_p;
  RORecordFieldPtr<Bool> flagRowField_p;
 
  // decompose a stokes value into constituent parts for use
  // in making the CORR_PRODUCT matrix
  void stokesKeys(Int stokesValue, Int &key1, Int &key2);
 
  // cleanup everything
  void clearAll();
 
  void clearRow();
 
  // initialize everything
  void initAll(MeasurementSet &ms, Vector<Bool> &handledCols, const Record &row);
 
  void initRow(Vector<Bool> &handledCols, const Record &row);
};
 
}  // namespace casacore
 
#endif