casacore::MSSelection Class Reference

MSSelection: Class to represent a selection on an MS. More...

#include <MSSelection.h>

Public Types
enum	MSExprType { NO_EXPR, ANTENNA_EXPR, CORR_EXPR, FIELD_EXPR, SPW_EXPR, SCAN_EXPR, ARRAY_EXPR, TIME_EXPR, UVDIST_EXPR, POLN_EXPR, STATE_EXPR, OBSERVATION_EXPR, FEED_EXPR, TAQL_EXPR, MAX_EXPR }
enum	MSSMode { PARSE_NOW, PARSE_LATE }
Public Member Functions
	MSSelection ()
	Default null constructor, and destructor.
virtual	~MSSelection ()
	MSSelection (const MeasurementSet &ms, const MSSMode &mode=PARSE_NOW, const String &timeExpr="", const String &antennaExpr="", const String &fieldExpr="", const String &spwExpr="", const String &uvDistExpr="", const String &taqlExpr="", const String &polnExpr="", const String &scanExpr="", const String &arrayExpr="", const String &stateExpr="", const String &observationExpr="", const String &feedExpr="")
	Construct using an MS and the various selection expressions to be applied to the given MS.
	MSSelection (const Record &selectionItem)
	Construct from a record representing a selection item at the CLI or user interface level.
	MSSelection (const MSSelection &other)
	Copy constructor.
MSSelection &	operator= (const MSSelection &other)
	Assignment operator.
Bool	setAntennaExpr (const String &antennaExpr)
	Expression setters.
Bool	setFieldExpr (const String &fieldExpr)
Bool	setSpwExpr (const String &spwExpr)
Bool	setScanExpr (const String &scanExpr)
Bool	setArrayExpr (const String &ArrayExpr)
Bool	setTimeExpr (const String &timeExpr)
Bool	setUvDistExpr (const String &uvDistExpr)
Bool	setTaQLExpr (const String &taqlExpr)
Bool	setPolnExpr (const String &polnExpr)
Bool	setStateExpr (const String &stateExpr)
Bool	setObservationExpr (const String &observationExpr)
Bool	setFeedExpr (const String &feedExpr)
const String	getExpr (const MSExprType type=NO_EXPR)
	Accessor for the various selection expressions as strings.
TableExprNode	getTEN (const MeasurementSet *ms=NULL)
	Accessor for result of parsing all of the selection expressions.
Vector< Int >	getScanList (const MeasurementSet *ms=NULL)
	Accessor for the list of the selected scan IDs.
Vector< Int >	getObservationList (const MeasurementSet *ms=NULL)
	Accessor for the list of the selected observation IDs.
Vector< Int >	getFeed1List (const MeasurementSet *ms=NULL)
	Accessor for the list of the selected feed1 IDs.
Vector< Int >	getFeed2List (const MeasurementSet *ms=NULL)
	Accessor for the list of the selected feed2 IDs.
Matrix< Int >	getFeedPairList (const MeasurementSet *ms=NULL)
	Similar to baselines for antennas.
Vector< Int >	getSubArrayList (const MeasurementSet *ms=NULL)
	Accessor for the list of selected sub-array IDs.
Vector< Int >	getAntenna1List (const MeasurementSet *ms=NULL)
	Accessor for the list of antenna-1 of the selected baselines.
Vector< Int >	getAntenna2List (const MeasurementSet *ms=NULL)
	Accessor for the list of antenna-2 of the selected baselines.
Matrix< Int >	getBaselineList (const MeasurementSet *ms=NULL)
	Accessor for the list of selected baselines.
Vector< Int >	getFieldList (const MeasurementSet *ms=NULL)
	Accessor for the list of selected field IDs.
Vector< Int >	getStateObsModeList (const MeasurementSet *ms=NULL)
	Accessor for the list of selected state Obs_Modes.
Matrix< Double >	getTimeList (const MeasurementSet *ms=NULL)
	Accessor for the list of the specified time range(s) as the start and end MJD values.
Matrix< Double >	getUVList (const MeasurementSet *ms=NULL)
	Accessor for the list of the specified uv-range(s) as the start and end values in units used in the MS.
Vector< Bool >	getUVUnitsList (const MeasurementSet *ms=NULL)
	Accessor for the list of user defined units for the uv-range(s).
Vector< Int >	getSpwList (const MeasurementSet *ms=NULL)
	Accessor for the list of the selected Spectral Window IDs.
Matrix< Int >	getChanList (const MeasurementSet *ms=NULL, const Int defaultStep=1, const Bool sorted=False)
	Accessor for the table (as a nx4 Matrix) of the selected Spectral Windows and associated ranges of selected channels.
Matrix< Double >	getChanFreqList (const MeasurementSet *ms=NULL, const Bool sorted=False)
	Same as getChanList, except that the channels and steps are in Hz.
Vector< Int >	getDDIDList (const MeasurementSet *ms=NULL)
	Accessor for the list of the selected Data Description IDs (DDID) from the polarization expression parsing.
Vector< Int >	getSPWDDIDList (const MeasurementSet *ms=NULL)
	Accessor for the list of the selected Data Description IDs from the SPW expression parsing.
OrderedMap< Int, Vector< Int > >	getPolMap (const MeasurementSet *ms=NULL)
	The key in the ordered map returned by getPolMap() is the Data Description ID (DDID).
OrderedMap< Int, Vector < Vector< Int > > >	getCorrMap (const MeasurementSet *ms=NULL)
	The key in the ordered map returned by getCorrMap() is the pol.
void	getChanSlices (Vector< Vector< Slice > > &chanslices, const MeasurementSet *ms=NULL, const Int defaultChanStep=1)
	Methods to convert the maps return by getChanList and getCorrMap to a list of Slice which can be directly used by Table system for in-row selection of frequency channels and polarizations.
void	getCorrSlices (Vector< Vector< Slice > > &corrslices, const MeasurementSet *ms=NULL)
void	clear (const MSExprType type=NO_EXPR)
	Clear sub-expression and reset priority.
void	clearErrorHandlers ()
	Set all error handlers to a known state (NULL).
Bool	exprIsNull (const MSExprType type=NO_EXPR)
void	deleteNodes ()
	Convey to the various parsers to delete the TENs they hold.
void	deleteErrorHandlers ()
	Delete error handlers (mostly the internally allocated ones).
TableExprNode	toTableExprNode (const MeasurementSet *ms)
	Convert to TableExprNode format (C++ interface to TaQL).
TableExprNode	toTableExprNode (MSSelectableTable *msLike)
	Convert to TableExprNode format (C++ interface to TaQL).
Bool	getSelectedMS (MeasurementSet &selectedMS, const String &outMSName="")
	Return the selected MS.
void	resetMS (const MeasurementSet &ms)
void	resetTEN ()
void	reset (const MeasurementSet &ms, const MSSMode &mode=PARSE_NOW, const String &timeExpr="", const String &antennaExpr="", const String &fieldExpr="", const String &spwExpr="", const String &uvDistExpr="", const String &taqlExpr="", const String &polnExpr="", const String &scanExpr="", const String &arrayExpr="", const String &stateExpr="", const String &observationExpr="")
	The MSSelection object is designed to be re-usable object.
void	reset2 (const MeasurementSet &ms, const MSSMode &mode=PARSE_NOW, const String &timeExpr="", const String &antennaExpr="", const String &fieldExpr="", const String &spwExpr="", const String &uvDistExpr="", const String &taqlExpr="", const String &polnExpr="", const String &scanExpr="", const String &arrayExpr="", const String &stateExpr="", const String &observationExpr="", const String &feedExpr="")
	Add feedExpr; keep old signature for backwards compatibility.
void	reset (MSSelectableTable &msLike, const MSSMode &mode=PARSE_NOW, const String &timeExpr="", const String &antennaExpr="", const String &fieldExpr="", const String &spwExpr="", const String &uvDistExpr="", const String &taqlExpr="", const String &polnExpr="", const String &scanExpr="", const String &arrayExpr="", const String &stateExpr="", const String &observationExpr="")
	This version of reset() works with generic MSSelectableTable object.
void	reset2 (MSSelectableTable &msLike, const MSSMode &mode=PARSE_NOW, const String &timeExpr="", const String &antennaExpr="", const String &fieldExpr="", const String &spwExpr="", const String &uvDistExpr="", const String &taqlExpr="", const String &polnExpr="", const String &scanExpr="", const String &arrayExpr="", const String &stateExpr="", const String &observationExpr="", const String &feedExpr="")
	Add feedExpr; keep old signature for backwards compatibility.
void	setMaxScans (const Int &n=1000)
	Set the maximum value acceptable for SCAN, OBSERVATION or SUB-ARRAY IDs.
void	setMaxObs (const Int &n=1000)
void	setMaxArray (const Int &n=1000)
void	setErrorHandler (const MSExprType type, MSSelectionErrorHandler *mssEH, const Bool overRide=True)
	Set the error handler to be used for reporting errors while parsing the type of expression give by the first argument.
void	initErrorHandler (const MSExprType tye=NO_EXPR)
	Initialize the error handler.
void	runErrorHandler ()
	Execute the handleError() method of the error-handlers.
const MeasurementSet *	getMS (MSSelectableTable *msLike)
	Return the pointer to the MS used internally.
Static Public Member Functions
static String	indexExprStr (Vector< Int > index)
	Helper method for converting index vectors to expression strings.
static String	nameExprStr (Vector< String > name)
	Helper method for converting name vectors to expression strings.
Private Member Functions
Bool	setOrder (MSSelection::MSExprType type)
	Set into the order of the selection expression.
void	fromSelectionItem (const Record &selectionItem)
	Initialize from a Record representing a selection item from the user interface or CLI.
Bool	definedAndSet (const Record &inpRec, const String &fieldName)
	Check if record field exists and is not unset.
Private Attributes
TableExprNode	fullTEN_p
	Convert an MS select string to TaQL const String msToTaQL(const String& msSelect) {};.
const MeasurementSet *	ms_p
String	antennaExpr_p
	Selection expressions.
String	fieldExpr_p
String	spwExpr_p
String	scanExpr_p
String	arrayExpr_p
String	timeExpr_p
String	uvDistExpr_p
String	polnExpr_p
String	taqlExpr_p
String	stateExpr_p
String	observationExpr_p
String	feedExpr_p
Vector< Int >	exprOrder_p
	Priority.
Vector< Int >	antenna1IDs_p
Vector< Int >	antenna2IDs_p
Vector< Int >	fieldIDs_p
Vector< Int >	spwIDs_p
Vector< Int >	scanIDs_p
Vector< Int >	arrayIDs_p
Vector< Int >	ddIDs_p
Vector< Int >	stateObsModeIDs_p
Vector< Int >	observationIDs_p
Vector< Int >	spwDDIDs_p
Vector< Int >	feed1IDs_p
Vector< Int >	feed2IDs_p
Matrix< Int >	chanIDs_p
Matrix< Int >	baselineIDs_p
Matrix< Int >	feedPairIDs_p
Matrix< Double >	selectedTimesList_p
Matrix< Double >	selectedUVRange_p
Vector< Bool >	selectedUVUnits_p
OrderedMap< Int, Vector< Int > >	selectedPolMap_p
OrderedMap< Int, Vector < Vector< Int > > >	selectedSetupMap_p
Int	maxScans_p
Int	maxObs_p
Int	maxArray_p
Bool	isMS_p
Bool	toTENCalled_p

Detailed Description

MSSelection: Class to represent a selection on an MS.

Intended use:

Public interface

Prerequisite

MeasurementSet module

Etymology

From "MeasurementSet" and "selection".

Synopsis

The MSSelection class represents a selection on a MeasurementSet (MS). This class is used in translating MS selections represented as selection items in the user interface, and for converting between MS selection and pure TaQL selection.

The purpose of this class is to provides a simple expression based selection mechanism to both the end-user and developer wishing to perform query operations over a measurement set. This is accomplished by abstracting the TaQL interface through an adapter/translation interface which converts STaQL (Simple Table Query Language) expressions into the equivalent table expression form, reducing the knowledge necessary to perform powerful query operations directly in TaQL. It is also possible to supply pure TaQL expression(s) as sub-expressions if required. For a complete list of the STaQL interface refer to the MeasurementSet Selection Syntax document at: Data Selection

The sub-expressions are interpreted in the order which they were set. The order however in not important - any dependency on the order in which the expressions are evaluated is handled internally. The result of parsing the expressions is TableExprNode (TEN). All TENs from sub-expressions are finally ANDed and the resultant TEN is used to select the rows of the MS table.

Example

 // Create a MS and a MS selection
 MeasurementSet ms(msName);
 MSSelection select;
 // Setup any sub-expressions of interest directly
 // (or optionally send this information through a Record)
 select.setFieldExpr("0,1");
 select.setSpwExpr(">0");
 // Create a table expression over a MS representing the selection
 TableExprNode node = select.toTableExprNode(&ms);
 // Optionally create a table and new MS based on this node
 Table tablesel(ms.tableName(), Table::Update);
 MeasurementSet mssel(tablesel(node, node.nrow()));

Motivation

This class is used by the MS access classes.

Definition at line 118 of file MSSelection.h.

Member Enumeration Documentation

enum casacore::MSSelection::MSExprType

Enumerator:

NO_EXPR
ANTENNA_EXPR
CORR_EXPR
FIELD_EXPR
SPW_EXPR
SCAN_EXPR
ARRAY_EXPR
TIME_EXPR
UVDIST_EXPR
POLN_EXPR
STATE_EXPR
OBSERVATION_EXPR
FEED_EXPR
TAQL_EXPR
MAX_EXPR

Definition at line 121 of file MSSelection.h.

enum casacore::MSSelection::MSSMode

Enumerator:

PARSE_NOW
PARSE_LATE

Definition at line 136 of file MSSelection.h.

Constructor & Destructor Documentation

casacore::MSSelection::MSSelection ( )

Default null constructor, and destructor.

virtual casacore::MSSelection::~MSSelection ( ) [virtual]

casacore::MSSelection::MSSelection	(	const MeasurementSet &	ms,
		const MSSMode &	mode = `PARSE_NOW`,
		const String &	timeExpr = `""`,
		const String &	antennaExpr = `""`,
		const String &	fieldExpr = `""`,
		const String &	spwExpr = `""`,
		const String &	uvDistExpr = `""`,
		const String &	taqlExpr = `""`,
		const String &	polnExpr = `""`,
		const String &	scanExpr = `""`,
		const String &	arrayExpr = `""`,
		const String &	stateExpr = `""`,
		const String &	observationExpr = `""`,
		const String &	feedExpr = `""`
	)

Construct using an MS and the various selection expressions to be applied to the given MS.

By default, the expressions will be parsed immediately. With mode=PARSE_LATE, the parsing will be done with a call to toTableExprNode().

casacore::MSSelection::MSSelection ( const Record & selectionItem )

Construct from a record representing a selection item at the CLI or user interface level.

This is functionally same as the constructor above with mode=PARSE_LATE.

casacore::MSSelection::MSSelection ( const MSSelection & other )

Copy constructor.

Member Function Documentation

void casacore::MSSelection::clear ( const MSExprType type = NO_EXPR )

Clear sub-expression and reset priority.

Default behavior is to reset all sub-expressions.

void casacore::MSSelection::clearErrorHandlers ( )

Set all error handlers to a known state (NULL).

Bool casacore::MSSelection::definedAndSet	(	const Record &	inpRec,
		const String &	fieldName
	)			`[private]`

Check if record field exists and is not unset.

void casacore::MSSelection::deleteErrorHandlers ( )

Delete error handlers (mostly the internally allocated ones).

void casacore::MSSelection::deleteNodes ( )

Convey to the various parsers to delete the TENs they hold.

Bool casacore::MSSelection::exprIsNull ( const MSExprType type = NO_EXPR )

void casacore::MSSelection::fromSelectionItem ( const Record & selectionItem ) [private]

Initialize from a Record representing a selection item from the user interface or CLI.

Vector<Int> casacore::MSSelection::getAntenna1List ( const MeasurementSet * ms = NULL ) [inline]

Accessor for the list of antenna-1 of the selected baselines.

Antennas affected by the baseline negation operator have the antenna IDs multiplied by -1.

Definition at line 229 of file MSSelection.h.

References antenna1IDs_p, and getTEN().

Vector<Int> casacore::MSSelection::getAntenna2List ( const MeasurementSet * ms = NULL ) [inline]

Accessor for the list of antenna-2 of the selected baselines.

Antennas affected by the baseline negation operator have the antenna IDs multiplied by -1.

Definition at line 236 of file MSSelection.h.

References antenna2IDs_p, and getTEN().

Matrix<Int> casacore::MSSelection::getBaselineList ( const MeasurementSet * ms = NULL ) [inline]

Accessor for the list of selected baselines.

The list is a Nx2 Matrix with one row per baseline containing the antenna IDs of the two antenna associated with the baseline.

Baselines affected by the negation operator in the baseline selection expression are reported with one or both the antenna IDs multiplied by -1. E.g. a baseline selection expression "!1" will result in a baseline list

[-1, 2], [-1, 3], [-1, 4], ...\.

The expression "!1&10" will result in a baseline list [-1, -10]. Etc..\.

Definition at line 257 of file MSSelection.h.

References baselineIDs_p, and getTEN().

Matrix<Double> casacore::MSSelection::getChanFreqList	(	const MeasurementSet *	ms = `NULL`,
		const Bool	sorted = `False`
	)

Same as getChanList, except that the channels and steps are in Hz.

Matrix<Int> casacore::MSSelection::getChanList	(	const MeasurementSet *	ms = `NULL`,
		const Int	defaultStep = `1`,
		const Bool	sorted = `False`
	)

Accessor for the table (as a nx4 Matrix) of the selected Spectral Windows and associated ranges of selected channels.

Each row of the Matrix has the following elements:

SpwID StartCh StopCh Step

where StartCh, StopCh and Step are the first and the last selected channels and step is the step size. If no step size was supplied as part of the expression, the value of Step is replaced with the value of the defaultStep parameter. Multiple channel specifications for the same Spectral Window selection, results in multiple rows in the Matrix. If sorted is True, the rows of the output Matrix will be sorted by the SPW IDs (the entries in the first column).

void casacore::MSSelection::getChanSlices	(	Vector< Vector< Slice > > &	chanslices,
		const MeasurementSet *	ms = `NULL`,
		const Int	defaultChanStep = `1`
	)

Methods to convert the maps return by getChanList and getCorrMap to a list of Slice which can be directly used by Table system for in-row selection of frequency channels and polarizations.

OrderedMap<Int, Vector<Vector<Int> > > casacore::MSSelection::getCorrMap ( const MeasurementSet * ms = NULL ) [inline]

The key in the ordered map returned by getCorrMap() is the pol.

in the Data Description ID (DDID) sub-table. The value is a Vector of two Vectors.

The returned Map<T> has a key that maps to two vectors: Key ----> Vector1 Vector2

Key : Row index in the POLARIZATION sub-table

Vector1 : List of poln. indices selected from the row pointed by Key. These are the in-row indices to pick-out the desired (selected) polarization products from the selected rows of the MS (or equivalently, the list of indices for the vector in the corrType column of the POLARIZATION sub-table).

Vector2 : List of selected rows from the DATA_DESCRIPTION sub-table

An example: following are the sub-tables used for the example explaination below:

POLARIZATION Sub-table ====================== Row Poln ------------ 0 RR, LL 1 RR, LR, RL, LL

DATA_DESCRIPTION Sub-table ========================== Row PolnID SpwID ------------------------------ 0 0 0 1 1 1 2 1 2 3 1 3 4 1 4 5 1 5 6 1 6 7 1 7 8 1 8

E.g., the expression poln='LL'

returns the Map:

corrmap = (0, [[1], [0]]) (1, [[3], [0,1,2,3,4,5,6,7,8]] )

The rows from the POLARIZATION table selected are 0 and 1, These are two keys for the two entries in the map.

1. The two vectors in map 1 are: [1] and [0]. The this reads as: From the 0th. row of the POLARIZATION table, use the indices [1]. The relevant list of associated DD rows are [0]

2. The two vectors in map 2 are: [3] and [0,1,2,3,4,5,6,7,8]. This reads as: From the 1st. row of the POLARIZATION table, use the indices [3]. The relevant list of associated DD rows are [0,1,2,3,4,5,6,7,8].

For a client code:

o To get a list of the DDIDs selected, iterate over all entries of the map and collate the second vector from each entry.

Or, use getDDIDList().

o To get the list of the selected poln. *in-row indices*, collate the first vector from each entry.

o To get a list of POLARIZATION IDs selected (rows of the POLARIZATION table), make a list of all the keys of this map.

Definition at line 421 of file MSSelection.h.

References getTEN(), and selectedSetupMap_p.

void casacore::MSSelection::getCorrSlices	(	Vector< Vector< Slice > > &	corrslices,
		const MeasurementSet *	ms = `NULL`
	)

Vector<Int> casacore::MSSelection::getDDIDList ( const MeasurementSet * ms = NULL ) [inline]

Accessor for the list of the selected Data Description IDs (DDID) from the polarization expression parsing.

The actual selected DDIDs would be an intersection of the DDIDs selected from polarization and SPW expressions parsing (see getSPWDDIDList() below).

Definition at line 320 of file MSSelection.h.

References ddIDs_p, getTEN(), and casacore::ArrayBase::nelements().

const String casacore::MSSelection::getExpr ( const MSExprType type = NO_EXPR )

Accessor for the various selection expressions as strings.

Vector<Int> casacore::MSSelection::getFeed1List ( const MeasurementSet * ms = NULL ) [inline]

Accessor for the list of the selected feed1 IDs.

Definition at line 211 of file MSSelection.h.

References feed1IDs_p, and getTEN().

Vector<Int> casacore::MSSelection::getFeed2List ( const MeasurementSet * ms = NULL ) [inline]

Accessor for the list of the selected feed2 IDs.

Definition at line 215 of file MSSelection.h.

References feed2IDs_p, and getTEN().

Matrix<Int> casacore::MSSelection::getFeedPairList ( const MeasurementSet * ms = NULL ) [inline]

Similar to baselines for antennas.

Definition at line 219 of file MSSelection.h.

References feedPairIDs_p, and getTEN().

Vector<Int> casacore::MSSelection::getFieldList ( const MeasurementSet * ms = NULL ) [inline]

Accessor for the list of selected field IDs.

Definition at line 261 of file MSSelection.h.

References fieldIDs_p, and getTEN().

const MeasurementSet* casacore::MSSelection::getMS ( MSSelectableTable * msLike )

Return the pointer to the MS used internally.

Vector<Int> casacore::MSSelection::getObservationList ( const MeasurementSet * ms = NULL ) [inline]

Accessor for the list of the selected observation IDs.

Definition at line 207 of file MSSelection.h.

References getTEN(), and observationIDs_p.

OrderedMap<Int, Vector<Int> > casacore::MSSelection::getPolMap ( const MeasurementSet * ms = NULL ) [inline]

The key in the ordered map returned by getPolMap() is the Data Description ID (DDID).

The value is a vector containing the list of in-row indices to pick out the selected polarizations (or equivalently, the list of indices for the vector in the corrType column of the POLARIZATION sub-table). These are also what the user intended (i.e., e.g. not all DD IDs due to user POL expression might be selected due to SPW expressions).

Definition at line 345 of file MSSelection.h.

References getTEN(), and selectedPolMap_p.

Vector<Int> casacore::MSSelection::getScanList ( const MeasurementSet * ms = NULL ) [inline]

Accessor for the list of the selected scan IDs.

Definition at line 203 of file MSSelection.h.

References getTEN(), and scanIDs_p.

Bool casacore::MSSelection::getSelectedMS	(	MeasurementSet &	selectedMS,
		const String &	outMSName = `""`
	)

Return the selected MS.

The selected MS reflects only row selections (as against in-row selections). If outMSName != "", the selected MS is also written to the disk (a shallow copy).

For in-row selection, use the appropriate global function mssSetData() MSSelectionTools.h which also returns the in-row (corr/chan) slices that can be supplied to the VisIter object for on-the-fly in-row selection.

Vector<Int> casacore::MSSelection::getSPWDDIDList ( const MeasurementSet * ms = NULL ) [inline]

Accessor for the list of the selected Data Description IDs from the SPW expression parsing.

The actual selected DDIDs would be an intersection of the DDIDs selected from polarization and SPW expressions parsing (see getDDIDList() above).

The actual DDIDs selected will be an intersection of the lists from getDDIDList() and getSPWDDIDList() (which can be generated using the set_intersection(Vector<Int>&, Vector<Int>&) global method in MSSelectionTool.{cc,h}).

Definition at line 333 of file MSSelection.h.

References getTEN(), casacore::ArrayBase::nelements(), and spwDDIDs_p.

Vector<Int> casacore::MSSelection::getSpwList ( const MeasurementSet * ms = NULL ) [inline]

Accessor for the list of the selected Spectral Window IDs.

Definition at line 287 of file MSSelection.h.

References getTEN(), and spwIDs_p.

Vector<Int> casacore::MSSelection::getStateObsModeList ( const MeasurementSet * ms = NULL ) [inline]

Accessor for the list of selected state Obs_Modes.

Definition at line 266 of file MSSelection.h.

References getTEN(), casacore::ArrayBase::nelements(), and stateObsModeIDs_p.

Vector<Int> casacore::MSSelection::getSubArrayList ( const MeasurementSet * ms = NULL ) [inline]

Accessor for the list of selected sub-array IDs.

Definition at line 223 of file MSSelection.h.

References arrayIDs_p, and getTEN().

TableExprNode casacore::MSSelection::getTEN ( const MeasurementSet * ms = NULL )

Accessor for result of parsing all of the selection expressions.

The final TableExprNode (TEN) is the result of ANDing the TENs for the individual expressions.

Referenced by getAntenna1List(), getAntenna2List(), getBaselineList(), getCorrMap(), getDDIDList(), getFeed1List(), getFeed2List(), getFeedPairList(), getFieldList(), getObservationList(), getPolMap(), getScanList(), getSPWDDIDList(), getSpwList(), getStateObsModeList(), getSubArrayList(), getTimeList(), getUVList(), and getUVUnitsList().

Matrix<Double> casacore::MSSelection::getTimeList ( const MeasurementSet * ms = NULL ) [inline]

Accessor for the list of the specified time range(s) as the start and end MJD values.

The time ranges are stored as columns, i.e. the output Matrix is 2 x n_ranges.

Definition at line 272 of file MSSelection.h.

References getTEN(), and selectedTimesList_p.

Matrix<Double> casacore::MSSelection::getUVList ( const MeasurementSet * ms = NULL ) [inline]

Accessor for the list of the specified uv-range(s) as the start and end values in units used in the MS.

Definition at line 277 of file MSSelection.h.

References getTEN(), and selectedUVRange_p.

Vector<Bool> casacore::MSSelection::getUVUnitsList ( const MeasurementSet * ms = NULL ) [inline]

Accessor for the list of user defined units for the uv-range(s).

The uv-range(s) return by getUVList is always in the units used in the MS.

Definition at line 283 of file MSSelection.h.

References getTEN(), and selectedUVUnits_p.

static String casacore::MSSelection::indexExprStr ( Vector< Int > index ) [static]

Helper method for converting index vectors to expression strings.

void casacore::MSSelection::initErrorHandler ( const MSExprType tye = NO_EXPR )

Initialize the error handler.

This is set the error-handler to the user supplied error handler via setErrorHandler() or to the default built-in error handler.

static String casacore::MSSelection::nameExprStr ( Vector< String > name ) [static]

Helper method for converting name vectors to expression strings.

MSSelection& casacore::MSSelection::operator= ( const MSSelection & other )

Assignment operator.

void casacore::MSSelection::reset	(	MSSelectableTable &	msLike,
		const MSSMode &	mode = `PARSE_NOW`,
		const String &	timeExpr = `""`,
		const String &	antennaExpr = `""`,
		const String &	fieldExpr = `""`,
		const String &	spwExpr = `""`,
		const String &	uvDistExpr = `""`,
		const String &	taqlExpr = `""`,
		const String &	polnExpr = `""`,
		const String &	scanExpr = `""`,
		const String &	arrayExpr = `""`,
		const String &	stateExpr = `""`,
		const String &	observationExpr = `""`
	)

This version of reset() works with generic MSSelectableTable object.

Accessing the services of the MSSelection module via this interface is recommended over the version of reset() that uses MeasurementSet.

void casacore::MSSelection::reset	(	const MeasurementSet &	ms,
		const MSSMode &	mode = `PARSE_NOW`,
		const String &	timeExpr = `""`,
		const String &	antennaExpr = `""`,
		const String &	fieldExpr = `""`,
		const String &	spwExpr = `""`,
		const String &	uvDistExpr = `""`,
		const String &	taqlExpr = `""`,
		const String &	polnExpr = `""`,
		const String &	scanExpr = `""`,
		const String &	arrayExpr = `""`,
		const String &	stateExpr = `""`,
		const String &	observationExpr = `""`
	)

The MSSelection object is designed to be re-usable object.

The following reset() methods set the internal state of the object to same state as with the equivalent constructor.

mode can be one of the MSSModes. MSSMode::PARSE_NOW will parse the given expressions and internally hold the final TEN (i.e. will also internally call toTableExprNode()). The internal TEN can be accessed via the getTEN() method. MSSMode::PARSE_LATER will only set the expression strings. Parsing will be done later with a call to toTableExprNode().

This version, here for backward compatibility reasons, internally constructs a MSSelectableTable object and calls the reset() method below that works with MSSelectableTable.

void casacore::MSSelection::reset2	(	MSSelectableTable &	msLike,
		const MSSMode &	mode = `PARSE_NOW`,
		const String &	timeExpr = `""`,
		const String &	antennaExpr = `""`,
		const String &	fieldExpr = `""`,
		const String &	spwExpr = `""`,
		const String &	uvDistExpr = `""`,
		const String &	taqlExpr = `""`,
		const String &	polnExpr = `""`,
		const String &	scanExpr = `""`,
		const String &	arrayExpr = `""`,
		const String &	stateExpr = `""`,
		const String &	observationExpr = `""`,
		const String &	feedExpr = `""`
	)

Add feedExpr; keep old signature for backwards compatibility.

void casacore::MSSelection::reset2	(	const MeasurementSet &	ms,
		const MSSMode &	mode = `PARSE_NOW`,
		const String &	timeExpr = `""`,
		const String &	antennaExpr = `""`,
		const String &	fieldExpr = `""`,
		const String &	spwExpr = `""`,
		const String &	uvDistExpr = `""`,
		const String &	taqlExpr = `""`,
		const String &	polnExpr = `""`,
		const String &	scanExpr = `""`,
		const String &	arrayExpr = `""`,
		const String &	stateExpr = `""`,
		const String &	observationExpr = `""`,
		const String &	feedExpr = `""`
	)

Add feedExpr; keep old signature for backwards compatibility.

void casacore::MSSelection::resetMS ( const MeasurementSet & ms ) [inline]

Definition at line 479 of file MSSelection.h.

References ms_p, and resetTEN().

void casacore::MSSelection::resetTEN ( ) [inline]

Definition at line 480 of file MSSelection.h.

References fullTEN_p.

Referenced by resetMS().

void casacore::MSSelection::runErrorHandler ( )

Execute the handleError() method of the error-handlers.

This is called in the catch code for any exceptions emitted from any of the parsers. It is also called at the end of the parsing cycle.

Bool casacore::MSSelection::setAntennaExpr ( const String & antennaExpr )

Expression setters.

The following set*Expr() methods only set the expressions. Parsing is done with a call to toTableExprNode().

Bool casacore::MSSelection::setArrayExpr ( const String & ArrayExpr )

void casacore::MSSelection::setErrorHandler	(	const MSExprType	type,
		MSSelectionErrorHandler *	mssEH,
		const Bool	overRide = `True`
	)

Set the error handler to be used for reporting errors while parsing the type of expression give by the first argument.

Bool casacore::MSSelection::setFeedExpr ( const String & feedExpr )

Bool casacore::MSSelection::setFieldExpr ( const String & fieldExpr )

void casacore::MSSelection::setMaxArray ( const Int & n = 1000 ) [inline]

Definition at line 572 of file MSSelection.h.

References maxArray_p.

void casacore::MSSelection::setMaxObs ( const Int & n = 1000 ) [inline]

Definition at line 571 of file MSSelection.h.

References maxObs_p.

void casacore::MSSelection::setMaxScans ( const Int & n = 1000 ) [inline]

Set the maximum value acceptable for SCAN, OBSERVATION or SUB-ARRAY IDs.

The main-table columns for these do not refere to rows of sub-tables and therefore there is no cheap way to find a valid range for these which can be used in the parsers to generate error or warning messages if a value outside the range is used in the expressions. The default maximum value for scan, observation and sub-array IDs is 1000.

Definition at line 570 of file MSSelection.h.

References maxScans_p.

Bool casacore::MSSelection::setObservationExpr ( const String & observationExpr )

Bool casacore::MSSelection::setOrder ( MSSelection::MSExprType type ) [private]

Set into the order of the selection expression.

Bool casacore::MSSelection::setPolnExpr ( const String & polnExpr )

Bool casacore::MSSelection::setScanExpr ( const String & scanExpr )

Bool casacore::MSSelection::setSpwExpr ( const String & spwExpr )

Bool casacore::MSSelection::setStateExpr ( const String & stateExpr )

Bool casacore::MSSelection::setTaQLExpr ( const String & taqlExpr )

Bool casacore::MSSelection::setTimeExpr ( const String & timeExpr )

Bool casacore::MSSelection::setUvDistExpr ( const String & uvDistExpr )

TableExprNode casacore::MSSelection::toTableExprNode ( MSSelectableTable * msLike )

Convert to TableExprNode format (C++ interface to TaQL).

The MSSelectableTable is a pure-virtual base class which provides a generic interface both to MeasurementSet and CalTable (in the synthesis module) services used in MSSelection. The actual objects used for supplying MeasurementSet or CalTable to MSSelection are MSInterface and CTInterface classes respectively. With this, MSSelection module can be used for selection on MeasurementSet or CalTable.

TableExprNode casacore::MSSelection::toTableExprNode ( const MeasurementSet * ms )

Convert to TableExprNode format (C++ interface to TaQL).

This is now for purely backwards compatibility and ease of use. It internally constructs the MSSelectableTable from the supplied MS and calls the generic version of toTableExprNode below (which works with MSSelectableTable object).