casacore::MSScanParse Class Reference

Class to hold values from scan grammar parser. More...

#include <MSScanParse.h>

Inheritance diagram for casacore::MSScanParse:

Public Member Functions
	MSScanParse ()
	Default constructor.
	MSScanParse (const MeasurementSet *ms)
	Associate the ms and the shorthand.
	MSScanParse (const MeasurementSet *ms, const TableExprNode &colAsTEN)
	~MSScanParse ()
const TableExprNode *	selectRangeGTAndLT (const Int &n0, const Int &n1)
const TableExprNode *	selectRangeGEAndLE (const Int &n0, const Int &n1)
const TableExprNode *	selectScanIds (const Vector< Int > &scanids)
const TableExprNode *	selectScanIds ()
const TableExprNode *	selectScanIdsGT (const Vector< Int > &scanids)
const TableExprNode *	selectScanIdsLT (const Vector< Int > &scanids)
const TableExprNode *	selectScanIdsGTEQ (const Vector< Int > &scanids)
const TableExprNode *	selectScanIdsLTEQ (const Vector< Int > &scanids)
std::vector< Int > &	accumulateIDs (const Int id0, const Int id1=-1)
const TableExprNode	node ()
	Get table expression node object.
Vector< Int >	selectedIDs ()
void	reset ()
void	cleanup ()
void	setMaxScan (const Int &n)
Static Public Attributes
static MSScanParse *	thisMSSParser
Private Member Functions
void	appendToIDList (const Vector< Int > &v)
Private Attributes
TableExprNode	node_p
Vector< Int >	idList
std::vector< Int >	parsedIDList_p
const String	colName
Int	maxScans_p
Static Private Attributes
static TableExprNode	columnAsTEN_p

Detailed Description

Class to hold values from scan grammar parser.

Intended use:

Internal

Etymology

MSScanParse is the class used to parse a scan command.

Synopsis

MSScanParse is used by the parser of scan sub-expression statements. The parser is written in Bison and Flex in files MSScanGram.y and .l. The statements in there use the routines in this file to act upon a reduced rule. Since multiple tables can be given (with a shorthand), the table names are stored in a list. The variable names can be qualified by the table name and will be looked up in the appropriate table.

The class MSScanParse only contains information about a table used in the table command. Global variables (like a list and a vector) are used in MSScanParse.cc to hold further information.

Global functions are used to operate on the information. The main function is the global function msScanCommand. It executes the given STaQL command and returns the resulting ms. This is, in fact, the only function to be used by a user.

Motivation

It is necessary to be able to give a ms command in ASCII. This can be used in a CLI or in the table browser to get a subset of a table or to sort a table.

Definition at line 87 of file MSScanParse.h.