casacore::TableInfo Class Reference

Table type, subtype and further info. More...

#include <TableInfo.h>

Public Types
enum	Type {   PAGEDIMAGE,   PAGEDARRAY,   MEASUREMENTSET,   ANTENNA,   ARRAY,   FEED,   FIELD,   OBSERVATION,   OBSLOG,   SOURCE,   SPECTRALWINDOW,   SYSCAL,   WEATHER,   ME_CALIBRATION,   LOG,   COMPONENTLIST }
	enum for various standard Table types. More...

Public Member Functions
	TableInfo ()
	Create an empty object. More...
	TableInfo (const String &fileName)
	Create the object reading it from the given file name. More...
	TableInfo (Type which)
	Create a TableInfo object of one of the predefined types. More...
	TableInfo (const TableInfo &that)
	Copy constructor (copy semantics). More...
TableInfo &	operator= (const TableInfo &that)
	Assignment (copy semantics). More...
	~TableInfo ()
const String &	type () const
	Get the table (sub)type. More...
const String &	subType () const
const String &	readme () const
	Get the readme. More...
void	setType (const String &type)
	Set the table (sub)type. More...
void	setSubType (const String &subType)
void	readmeClear ()
	Clear the readme. More...
void	readmeAddLine (const String &readmeLine)
	Add a line to the readme. More...
void	flush (const String &fileName)
	Write the TableInfo object. More...

Static Public Member Functions
static String	type (Type tableType)
	Convert the Type enumerator to a type and subType string. More...
static String	subType (Type tableType)

Private Attributes
String	type_p
String	subType_p
String	readme_p
Bool	writeIt_p

Detailed Description

Table type, subtype and further info.

Intended use:

Internal

Review Status

Reviewed By:

UNKNOWN

Date Reviewed:

before2004/08/25

Test programs:

tTable

Etymology

TableInfo holds information (like type) about a table.

Synopsis

TableInfo holds information about a table. It contains the following information:

Type

the type of a table (e.g. IMAGE, LOG).

SubType

the subtype of a table (e.g. UVDATA, MAP or ANTENNAPATTERN for type IMAGE).

Readme

An arbitrary number of lines containing ancillary text describing the table (or maybe its history).

This information is stored in the file table.info in the table directory. Regular tables as well as reference tables (results of sort/select) have their own table.info file.
The initial table-info of a regular table is blank. It has to be set explicitly by the user.
The initial table-info of a reference table is a copy of the table-info of its parent table. The user can add lines to the readme information to describe the table in more detail. Of course, the type and/or subtype can be changed at will.

The type and subtype information are stored at the beginning of the first two lines of the file as:

Type = TypeString
SubType = SubTypeString

These lines in the table.info file can be used by external programs (like the filebrowser) to determine the type of table being handled.

The third line in the file is blank. The line(s) thereafter contain the possible readme information (note that multiple readme lines are possible). They can be added using the function readmeAddLine.

Existing tables do not have a table.info file yet. The table system will handle them correctly and use a blank type, subtype and readme string. A table.info file will be created when the table is opened for update.

To be sure that different table types have unique names, it can be useful to use enum's and to define them in one common file. For Casacore tables this enum is defined in this file.

Example

// Open a table for update.
Table table("name", Table::Update);
// Get its TableInfo object.
TableInfo& info = table.tableInfo();
// Set type and subtype.
info.setType ("IMAGE");
info.setSubType ("SubTypeString");
// Add a few readme lines. The second one adds 2 lines.
info.readmeAddLine ("the first readme string");
info.readmeAddLine ("the second readme string\nthe third readme string");
// Display the type, etc.\.
cout << info.type() << " " << info.subType() << endl;
cout << info.readme();

Motivation

External programs need to be able to determine the type of a table.

Definition at line 130 of file TableInfo.h.

Member Enumeration Documentation

enum casacore::TableInfo::Type

enum for various standard Table types.

Underscores in the enumerator indicate different sub-types

Enumerator
PAGEDIMAGE	a PagedImage is a PagedArray with coordinates and Masking (opt.)
PAGEDARRAY	a PagedArray (.../Lattices/PagedArray.h)
MEASUREMENTSET	MeasurementSet main Table.
ANTENNA	MeasurementSet Antenna table.
ARRAY	MeasurementSet Array table.
FEED	MeasurementSet Feed characteristics table.
FIELD	MeasurementSet Field table.
OBSERVATION	MeasurementSet Observation information table.
OBSLOG	MeasurementSet Oserving Log table.
SOURCE	MeasurementSet Source table.
SPECTRALWINDOW	MeasurementSet Spectral Window table.
SYSCAL	MeasurementSet System Calibration table.
WEATHER	MeasurementSet Weather table.
ME_CALIBRATION	Measurement Equation Calibration table.
LOG	Casacore Log table.
COMPONENTLIST	A ComponentList table contains parameterised representations of the sky brightness.

Definition at line 135 of file TableInfo.h.

Constructor & Destructor Documentation

casacore::TableInfo::TableInfo

(

)

Create an empty object.

casacore::TableInfo::TableInfo ( const String &  fileName )

explicit

Create the object reading it from the given file name.

If the file does not exist, type, subtype and readme are initialized to a blank string.

casacore::TableInfo::TableInfo

(

Type

which

)

Create a TableInfo object of one of the predefined types.

This is a centralised way of setting the Table type only.

casacore::TableInfo::TableInfo

(

const TableInfo &

that

)

Copy constructor (copy semantics).

casacore::TableInfo::~TableInfo

(

)

Member Function Documentation

void casacore::TableInfo::flush

(

const String &

fileName

)

Write the TableInfo object.

TableInfo& casacore::TableInfo::operator=

(

const TableInfo &

that

)

Assignment (copy semantics).

const String & casacore::TableInfo::readme ( ) const

inline

Get the readme.

Definition at line 237 of file TableInfo.h.

References readme_p.

void casacore::TableInfo::readmeAddLine

(

const String &

readmeLine

)

Add a line to the readme.

It will itself add a newline character ('
') to the end of the line.

void casacore::TableInfo::readmeClear

(

)

Clear the readme.

void casacore::TableInfo::setSubType

(

const String &

subType

)

void casacore::TableInfo::setType

(

const String &

type

)

Set the table (sub)type.

const String & casacore::TableInfo::subType ( ) const

inline

Definition at line 233 of file TableInfo.h.

References subType_p.

Referenced by casa::CalTable::type().

static String casacore::TableInfo::subType ( Type  tableType )

static

const String & casacore::TableInfo::type ( ) const

inline

Get the table (sub)type.

Definition at line 229 of file TableInfo.h.

References type_p.

Referenced by casa::CacheFactory::getCache(), and casa::CacheFactory::needNewCache().

static String casacore::TableInfo::type ( Type  tableType )

static

Convert the Type enumerator to a type and subType string.

Member Data Documentation

String casacore::TableInfo::readme_p

private

Definition at line 223 of file TableInfo.h.

Referenced by readme().

String casacore::TableInfo::subType_p

private

Definition at line 222 of file TableInfo.h.

Referenced by subType().

String casacore::TableInfo::type_p

private

Definition at line 221 of file TableInfo.h.

Referenced by type().

Bool casacore::TableInfo::writeIt_p

private

Definition at line 224 of file TableInfo.h.

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

• casa/casacore/tables/Tables/TableInfo.h