casa::ConcatRows Class Reference

Class holding the row numbers in a ConcatTable. More...

#include <ConcatRows.h>

List of all members.

Public Member Functions
	ConcatRows ()
	Construct an empty block.
void	reserve (uInt ntable)
	Reserve the block for the given nr of tables.
void	add (uInt nrow)
	Add a table with the given nr of rows.
uInt	ntable () const
	Give the nr of tables.
uInt	nrow () const
	Get the total nr of rows.
uInt	operator[] (uInt i) const
	Give the nr of rows for the i-th table.
uInt	offset (uInt i) const
	Give the offset for the i-th table.
void	mapRownr (uInt &tableNr, uInt &tabRownr, uInt rownr) const
	Map an overall row number to a table and row number.
Private Member Functions
void	findRownr (uInt rownr) const
	Find the row number and fill in the lastXX_p values.
Private Attributes
Block< uInt >	itsRows
uInt	itsNTable
uInt	itsLastStRow
uInt	itsLastEndRow
uInt	itsLastTableNr

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Detailed Description

Class holding the row numbers in a ConcatTable.

Intended use:

Internal

Review Status

Reviewed By:

UNKNOWN

Test programs:

tConcatRows

Prerequisite

• Block

Synopsis

ConcatRows is used to hold the row numbers forming the concatenation of oher tables. table. It contains a vector which can hold the row numbers in 2 ways:

1. As a normal series of row numbers. This is used by e.g. class ConcatTable
2. As a series of Slices. In this case 3 subsequent entries in the vector are used to represent start, end, and increment. This is used by a function like ScalarColumn::getColumnRange.

Class ConcatRowsIter can be used to iterate through a ConcatRows object. Each step in the iteration goes to the next slice. If the ConcatRows object contains a simple series of row numbers, each slice contains only one row number. This can degrade performance, so it is possible to use shortcuts by testing if the object contains slices (using isSliced()) and getting the row number vector directly (using rowVector()).

Motivation

ConcatRows is meant to have one class representing the various ways of picking row numbers. This simplifies the interface of the table and data manager classes dealing with getting/putting the data.

Definition at line 82 of file ConcatRows.h.

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Constructor & Destructor Documentation

casa::ConcatRows::ConcatRows

(

)

[inline]

Construct an empty block.

Definition at line 86 of file ConcatRows.h.

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Member Function Documentation

void casa::ConcatRows::add

(

uInt

nrow

)

Add a table with the given nr of rows.

void casa::ConcatRows::findRownr

(

uInt

rownr

)

const [private]

Find the row number and fill in the lastXX_p values.

Referenced by mapRownr().

void casa::ConcatRows::mapRownr	(	uInt &	tableNr,
		uInt &	tabRownr,
		uInt	rownr
	)		const [inline]

Map an overall row number to a table and row number.

Definition at line 117 of file ConcatRows.h.

References findRownr(), itsLastEndRow, itsLastStRow, and itsLastTableNr.

uInt casa::ConcatRows::nrow

(

)

const [inline]

Get the total nr of rows.

Definition at line 105 of file ConcatRows.h.

References itsNTable, and itsRows.

uInt casa::ConcatRows::ntable

(

)

const [inline]

Give the nr of tables.

Definition at line 101 of file ConcatRows.h.

References itsNTable.

uInt casa::ConcatRows::offset

(

uInt

i

)

const [inline]

Give the offset for the i-th table.

Definition at line 113 of file ConcatRows.h.

References itsRows.

uInt casa::ConcatRows::operator[]

(

uInt

i

)

const [inline]

Give the nr of rows for the i-th table.

Definition at line 109 of file ConcatRows.h.

References itsRows.

void casa::ConcatRows::reserve

(

uInt

ntable

)

[inline]

Reserve the block for the given nr of tables.

Definition at line 94 of file ConcatRows.h.

References itsRows, and casa::Block< T >::resize().

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Member Data Documentation

uInt casa::ConcatRows::itsLastEndRow [mutable, private]

Definition at line 134 of file ConcatRows.h.

Referenced by mapRownr().

uInt casa::ConcatRows::itsLastStRow [mutable, private]

Definition at line 133 of file ConcatRows.h.

Referenced by mapRownr().

uInt casa::ConcatRows::itsLastTableNr [mutable, private]

Definition at line 135 of file ConcatRows.h.

Referenced by mapRownr().

uInt casa::ConcatRows::itsNTable [private]

Definition at line 132 of file ConcatRows.h.

Referenced by nrow(), and ntable().

Block<uInt> casa::ConcatRows::itsRows [private]

Definition at line 131 of file ConcatRows.h.

Referenced by nrow(), offset(), operator[](), and reserve().

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

• casacore/tables/Tables/ConcatRows.h