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casacore::MConvertBase Class Referenceabstract

Conversion of Measures Base. More...

#include <MConvertBase.h>

Inheritance diagram for casacore::MConvertBase:
casacore::MeasConvert< M > casacore::MeasConvert< MBaseline > casacore::MeasConvert< MDirection > casacore::MeasConvert< MDoppler > casacore::MeasConvert< MEarthMagnetic > casacore::MeasConvert< MEpoch > casacore::MeasConvert< MFrequency > casacore::MeasConvert< MRadialVelocity > casacore::MeasConvert< Muvw >

Public Member Functions

virtual ~MConvertBase ()
virtual void setModel (const Measure &val)=0
 Set a new model for the conversion. More...
virtual void set (const MeasValue &val)=0
 Set a new model value only. More...
virtual void set (const Unit &inunit)=0
 Set a new model unit only. More...
virtual void addMethod (uInt method)=0
 Add a method (Note: uInt should be an enum from the appropiate Measure) More...
virtual void addFrameType (uInt tp)=0
 Add a FrameTypes used (as specified in MeasFrame::FrameTypes) More...
virtual Int nMethod () const =0
 Get number of methods. More...
virtual uInt getMethod (uInt which) const =0
 Get method. More...
virtual void print (ostream &os) const =0
 Print a conversion engine. More...

Detailed Description

Conversion of Measures Base.

Intended use:


Review Status

Reviewed By:
Date Reviewed:
Test programs:




MConvertBase can convert a Measure to the same type of Measure in a different reference frame. The MConvertBase is a templated class, but has typedefs for the allowed conversions, like MEpoch::Convert.
The basic operation is to create a MConvertBase with either of:

An empty MeasRef indicates no conversion
. The constructor, and set functions, analyse the 'template' Measure and the output reference frame, and construct a pointer (in practice a list of pointers to bypass the necessity of creating too many conversion functions) to a conversion routine. Functionals will maybe used in a later version in stead of a vector of function pointers. During the implementation process, I have, for a variety of reasons, changed the list of function pointers to a list of numbers, with the Measure having just a doConvert() function containing an appropiate switch statement.
Actual conversions are done with the () operator, which produces a new MEpoch (or other Measure).
Possible arguments are (MVEpoch is used here generic, and indicates the internal format of a Measure; possibly, to make sure distinction between values with and without units is possible, even simple Measures will have their own internal class format, e.g. MVDouble. This will also aid in the possibility that I am still pursuing to have a fully dynamic conversion possibility. However, to be able to use pointers to functions in any reasonable way for all possible input and output types, a multi-level approach is necessary, with all possible datatypes derived from some MeasValue.):

Float versions will be produced if necessary.
The conversion analyser expects that all Measure classes have a set of routines to do the actual analysing and conversion.
If the standard conversion is not sufficient, additional methods can be added at the end of the list with the addMethod() member function, or at the beginning of the list with insertMethod(). The whole list can be cleared with clearMethod().
To ease the specification of the Method, each Measure has a typedef (e.g. MEpoch_ConvType) specifying the Method type.


See Measure for an example


Conversion of Measures will in general be done on a series of values. Separating the analysis of the calculations necessary for the conversion from the actual conversion could speed up the process.

Definition at line 147 of file MConvertBase.h.

Constructor & Destructor Documentation

virtual casacore::MConvertBase::~MConvertBase ( )

Member Function Documentation

virtual void casacore::MConvertBase::addFrameType ( uInt  tp)
pure virtual
virtual void casacore::MConvertBase::addMethod ( uInt  method)
pure virtual
virtual uInt casacore::MConvertBase::getMethod ( uInt  which) const
pure virtual
virtual Int casacore::MConvertBase::nMethod ( ) const
pure virtual
virtual void casacore::MConvertBase::print ( ostream &  os) const
pure virtual
virtual void casacore::MConvertBase::set ( const MeasValue val)
pure virtual
virtual void casacore::MConvertBase::set ( const Unit inunit)
pure virtual
virtual void casacore::MConvertBase::setModel ( const Measure val)
pure virtual

The documentation for this class was generated from the following file: