A class to provide easy read-write access to NewCalTable columns. More...

#include <CTColumns.h>

Inheritance diagram for casa::CTColumns:

Public Member Functions
	CTColumns (NewCalTable &caltable)
	Create a columns object that accesses the data in the specified caltable.
	~CTColumns ()
	The destructor does nothing special.
CTObservationColumns &	observation ()
	Read-write access to required subtables.
CTAntennaColumns &	antenna ()
CTFieldColumns &	field ()
CTHistoryColumns &	history ()
CTSpWindowColumns &	spectralWindow ()
const ROCTObservationColumns &	observation () const
	Read-write access to optional subtables.
const ROCTAntennaColumns &	antenna () const
const ROCTFieldColumns &	field () const
const ROCTHistoryColumns &	history () const
const ROCTSpWindowColumns &	spectralWindow () const
Private Attributes
CTObservationColumns	observation_p
	protected: friend class NewCalTable;
CTAntennaColumns	antenna_p
CTFieldColumns	field_p
CTHistoryColumns	history_p
CTSpWindowColumns	spectralWindow_p

Detailed Description

A class to provide easy read-write access to NewCalTable columns.

Intended use:

Public interface

Prerequisite

Etymology

CTColumns stands for NewCalTable columns.

Synopsis

This class provides access to all the subtables and direct access to all the columns in the NewCalTable. It does the declaration of all the Scalar and ArrayColumns with the correct types, so the application programmer doesn't have to worry about getting those right. There is an access function for every predefined column. Access to non-predefined columns will still have to be done with explicit declarations.

Example

    // use as follows
    NewCalTable newcalt("mynewcalt",Table::Update);
    CTColumns nctc(newcalt);
    // show time from row 5
    cout << nctc.time()(5);
    // change name of antenna on row 3 in antenna table
    nctc.antenna().name().put(3,"NewAnt-3");

Motivation

Having to type long lists of Scalar and Array column declarations gets very tedious. This class attempts to relieve some of that tedium, while at the same time concentrating all the declarations in one place, making Type errors in the column declaration (only caught at run-time) less probable. Type errors in the use of the columns is caught at compile time.

Definition at line 179 of file CTColumns.h.