Abstract base class for aggregate functions giving a string scalar. More...

#include <ExprGroup.h>

Inheritance diagram for casacore::TableExprGroupFuncString:

Public Member Functions
	TableExprGroupFuncString (TableExprNodeRep *node, const String &initValue=String())

virtual	~TableExprGroupFuncString ()

virtual String	getString (const vector< TableExprId > &)

Public Member Functions inherited from casacore::TableExprGroupFuncBase
	TableExprGroupFuncBase (TableExprNodeRep *node)
	Construct from the TaQL aggregation node. More...

virtual	~TableExprGroupFuncBase ()

virtual Bool	isLazy () const
	Does the aggregate function use lazy semantics? The default implementation returns False. More...

uInt	seqnr () const
	Get the function's sequence nr. More...

void	setSeqnr (uInt seqnr)
	Set the function's sequence nr. More...

virtual void	apply (const TableExprId &id)=0
	Get the operand's value for the given row and apply it to the aggregation. More...

virtual void	finish ()
	If needed, finish the aggregation. More...

virtual CountedPtr< vector < TableExprId > >	getIds () const
	Get the assembled TableExprIds of a group. More...

virtual Bool	getBool (const vector< TableExprId > &=vector< TableExprId >())
	Get the aggregated value. More...

virtual Int64	getInt (const vector< TableExprId > &=vector< TableExprId >())

virtual Double	getDouble (const vector< TableExprId > &=vector< TableExprId >())

virtual DComplex	getDComplex (const vector< TableExprId > &=vector< TableExprId >())

virtual MVTime	getDate (const vector< TableExprId > &=vector< TableExprId >())

virtual MArray< Bool >	getArrayBool (const vector< TableExprId > &=vector< TableExprId >())

virtual MArray< Int64 >	getArrayInt (const vector< TableExprId > &=vector< TableExprId >())

virtual MArray< Double >	getArrayDouble (const vector< TableExprId > &=vector< TableExprId >())

virtual MArray< DComplex >	getArrayDComplex (const vector< TableExprId > &=vector< TableExprId >())

virtual MArray< MVTime >	getArrayDate (const vector< TableExprId > &=vector< TableExprId >())

virtual MArray< String >	getArrayString (const vector< TableExprId > &=vector< TableExprId >())

Protected Attributes
String	itsValue

Protected Attributes inherited from casacore::TableExprGroupFuncBase
TableExprNodeRep *	itsNode

TableExprNodeRep *	itsOperand

uInt	itsSeqnr

Detailed Description

Abstract base class for aggregate functions giving a string scalar.

Intended use:

Internal

Review Status

Test programs:: tExprGroup

Synopsis

This class is derived from TableExprGroupFuncBase and acts as the abstract base class for aggregate functions resulting in a string scalar.
Derived classes can use itsValue to contain the aggregated value. It that case they do not need to implement the get function.

Definition at line 606 of file ExprGroup.h.

Constructor & Destructor Documentation

casacore::TableExprGroupFuncString::TableExprGroupFuncString	(	TableExprNodeRep *	node,
		const String &	initValue = `String()`
	)

inlineexplicit

Definition at line 609 of file ExprGroup.h.

virtual casacore::TableExprGroupFuncString::~TableExprGroupFuncString ( )

virtual

Member Function Documentation

virtual String casacore::TableExprGroupFuncString::getString ( const vector< TableExprId > & )

virtual

Reimplemented from casacore::TableExprGroupFuncBase.

Member Data Documentation

String casacore::TableExprGroupFuncString::itsValue

protected

Definition at line 617 of file ExprGroup.h.

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

tables/TaQL/ExprGroup.h

Public Member Functions