AxesLength.hxx

Go to the documentation of this file.

//-----------------------------------------------------------------------------
// SVN: $Id: AxesLength.hxx 4813 2008-05-29 22:55:39Z RossCollins $
//-----------------------------------------------------------------------------
#ifndef AXESLENGTH_H
#define AXESLENGTH_H

#include "DataMethod.hxx"
#include "FitsFile.h"
//-----------------------------------------------------------------------------
template<typename DataType>
class AxesLength : public DataMethod<DataType>
{
public:
  AxesLength(const FitsFile& aFile)
    : mFile(aFile) { DataMethod<DataType>::methodName = "AxesLength"; }

  virtual ~AxesLength() {}

  void setSource(IntMap& tbls, IntMap& cols, StringMap units)
    { extnumColno = cols[0]; }

  void setTarget(IntMap& cols, StringMap units)
  {
    numaxesColno = cols[0];
    axis1Colno = cols[1];
    axis2Colno = cols[2];
  }

  void doit(TableData<DataType>& data, int row1, int row2)
  {
    double extNum;
    int naxes, npixx, npixy;

    for (int rowNo = row1; rowNo < row2; ++rowNo)
    {
      // move to the extension
      data.value(extnumColno, rowNo, extNum);
      mFile.movabsHdu((int)extNum);

      // get either the znaxis values for a compressed image
      // or the naxis values for an uncompressed one
      if (mFile.hasKey("ZIMAGE"))
      {
        mFile.readKey(FitsFile::ZNAXIS, naxes);
        mFile.readKey(FitsFile::ZNAXIS1, npixx);
        mFile.readKey(FitsFile::ZNAXIS2, npixy);
      }
      else
      {
        mFile.readKey(FitsFile::NAXIS, naxes);
        mFile.readKey(FitsFile::NAXIS1, npixx);
        mFile.readKey(FitsFile::NAXIS2, npixy);
      }

      data.assign(numaxesColno, rowNo, naxes);
      data.assign(axis1Colno, rowNo, npixx);
      data.assign(axis2Colno, rowNo, npixy);
    }
  }
  // No data from raw data included
  void doit2(TableData<DataType>& rawData, TableData<DataType>& data, int row1, int row2) { }

private:
  FitsFile mFile;
  int extnumColno;
  int numaxesColno;
  int axis1Colno;
  int axis2Colno;
};
//-----------------------------------------------------------------------------
#endif
//-----------------------------------------------------------------------------
// Change log:
//
// 13-Jun-2005, ETWS: First version, this file determines the image size
//                    form either ZNAXIS or NAXIS, depending if the fits
//                    file is compressed or not.
//  7-Dec-2005, ETWS: Included move of Fits Keys into class FitsFile
//  7-Apr-2008, ETWS: Upgraded to use new detection table layout.