casacore::TableExprNodeUnit Class Reference

Unit for scalar values in a table select expression tree. More...

#include <ExprUnitNode.h>

Inheritance diagram for casacore::TableExprNodeUnit:

List of all members.

Public Member Functions
	TableExprNodeUnit (TableExprNodeRep &child, const Unit &unit)
	Constrcut from the given child node and unit.
	~TableExprNodeUnit ()
virtual Double	getUnitFactor () const
	Get the unit factor.
virtual Double	getDouble (const TableExprId &id)
virtual DComplex	getDComplex (const TableExprId &id)
Static Public Member Functions
static Double	set (TableExprNodeRep &parent, const TableExprNodeRep &child, const Unit &unit)
	Calculate the conversion factor and return it.
static TableExprNodeRep *	useUnit (TableExprNodeRep *const node, const Unit &unit)
	Create a new node if unit conversion is needed.
static void	adaptUnit (TableExprNodeRep *&node, const Unit &unit)
	Use useUnit to see if a conversion is needed.
static Unit	adaptUnits (TableExprNodeRep *&node1, TableExprNodeRep *&node2, TableExprNodeRep *&node3)
	Find the unit to be used and adapt the nodes to it.
Private Attributes
Double	factor_p

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Detailed Description

Unit for scalar values in a table select expression tree.

Intended use:

Internal

Review Status

Reviewed By:

UNKNOWN

Date Reviewed:

before2004/08/25

Prerequisite

• TableExprNode
• Unit

Synopsis

This class represents a unit in a table select expression tree. It contains a unit conversion factor to convert the child to this unit. The factor is 1 if the child has no unit.

Definition at line 61 of file ExprUnitNode.h.

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Constructor & Destructor Documentation

casacore::TableExprNodeUnit::TableExprNodeUnit	(	TableExprNodeRep &	child,
		const Unit &	unit
	)

Constrcut from the given child node and unit.

casacore::TableExprNodeUnit::~TableExprNodeUnit

(

)

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Member Function Documentation

static void casacore::TableExprNodeUnit::adaptUnit	(	TableExprNodeRep *&	node,
		const Unit &	unit
	)			[static]

Use useUnit to see if a conversion is needed.

If so, adapt the reference counts and replace the node.

static Unit casacore::TableExprNodeUnit::adaptUnits	(	TableExprNodeRep *&	node1,
		TableExprNodeRep *&	node2,
		TableExprNodeRep *&	node3
	)			[static]

Find the unit to be used and adapt the nodes to it.

virtual DComplex casacore::TableExprNodeUnit::getDComplex

(

const TableExprId &

id

)

[virtual]

Reimplemented from casacore::TableExprNodeRep.

virtual Double casacore::TableExprNodeUnit::getDouble

(

const TableExprId &

id

)

[virtual]

Reimplemented from casacore::TableExprNodeRep.

virtual Double casacore::TableExprNodeUnit::getUnitFactor

(

)

const [virtual]

Get the unit factor.

Reimplemented from casacore::TableExprNodeRep.

static Double casacore::TableExprNodeUnit::set	(	TableExprNodeRep &	parent,
		const TableExprNodeRep &	child,
		const Unit &	unit
	)			[static]

Calculate the conversion factor and return it.

It is static to be useful for TableExprNodeArrayFunc as well.

static TableExprNodeRep* casacore::TableExprNodeUnit::useUnit	(	TableExprNodeRep *const	node,
		const Unit &	unit
	)			[static]

Create a new node if unit conversion is needed.

Otherwise return the current node.

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Member Data Documentation

Double casacore::TableExprNodeUnit::factor_p [private]

Definition at line 95 of file ExprUnitNode.h.

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

• casacore/tables/TaQL/ExprUnitNode.h