Class representing a cone search in table select expression. More...

#include <ExprConeNode.h>

Inheritance diagram for casa::TableExprConeNode:

Public Member Functions
	TableExprConeNode (FunctionType, NodeDataType, ValueType, const TableExprNodeSet &source, uInt origin)
	Constructor.
	~TableExprConeNode ()
	Destructor.
Bool	getBool (const TableExprId &id)
	'get' Functions to get the desired result of a function.
Int64	getInt (const TableExprId &id)
Array< Bool >	getArrayBool (const TableExprId &id)
	Get an array value for this node in the given row.
Array< Int64 >	getArrayInt (const TableExprId &id)
Static Public Member Functions
static NodeDataType	checkOperands (Block< Int > &dtypeOper, ValueType &resVT, Block< Int > &vtypeOper, FunctionType, PtrBlock< TableExprNodeRep * > &)
	Check the data and value types of the operands.
static TableExprNodeRep *	fillNode (TableExprConeNode thisNode, PtrBlock< TableExprNodeRep > &nodes, const Block< Int > &dtypeOper)
	Link the children to the node and convert the children to constants if possible.
static void	fillChildNodes (TableExprConeNode thisNode, PtrBlock< TableExprNodeRep > &nodes, const Block< Int > &dtypeOper)
	Link the children to the node and convert the children to constants if possible.
Private Member Functions
void	tryToConst ()
	Try if the function gives a constant result.
Static Private Member Functions
static Int	findNelem (const TableExprNodeRep *node)
	Find the number of elements in an argument.
Private Attributes
uInt	origin_p

Detailed Description

Class representing a cone search in table select expression.

Intended use:

Internal

Review Status

Reviewed By:: UNKNOWN
Date Reviewed:: before2004/08/25

Prerequisite

TableExprFuncNode

Synopsis

The class represents a cone search. It is a specialization of the TableExprFuncNode class. Currently the implementation is straightforward, but in the future it can do smarter things. For instance:

If the cone positions and radii are constant, one can use an integer zone number (e.g. floor(dec)) to avoid the much more expensive sine/cosine calculations. Each cone will get a minzone and maxzone value (derived from cone position and radius).
Multiple cones can be ordered on minzone and maxzone.

Definition at line 66 of file ExprConeNode.h.

Constructor & Destructor Documentation

casa::TableExprConeNode::TableExprConeNode	(	FunctionType	,
		NodeDataType	,
		ValueType	,
		const TableExprNodeSet &	source,
		uInt	origin
	)

Constructor.

casa::TableExprConeNode::~TableExprConeNode ( )

Destructor.

Member Function Documentation

static NodeDataType casa::TableExprConeNode::checkOperands	(	Block< Int > &	dtypeOper,
		ValueType &	resVT,
		Block< Int > &	vtypeOper,
		FunctionType	,
		PtrBlock< TableExprNodeRep * > &
	)		`[static]`

Check the data and value types of the operands.

It sets the exptected data and value types of the operands. Set the value type of the function result and returns the data type of the function result.

Reimplemented from casa::TableExprFuncNode.

static void casa::TableExprConeNode::fillChildNodes	(	TableExprConeNode *	thisNode,
		PtrBlock< TableExprNodeRep * > &	nodes,
		const Block< Int > &	dtypeOper
	)		`[static]`

Link the children to the node and convert the children to constants if possible.

static TableExprNodeRep* casa::TableExprConeNode::fillNode	(	TableExprConeNode *	thisNode,
		PtrBlock< TableExprNodeRep * > &	nodes,
		const Block< Int > &	dtypeOper
	)		`[static]`

Link the children to the node and convert the children to constants if possible.

Also convert the node to constant if possible.

static Int casa::TableExprConeNode::findNelem ( const TableExprNodeRep * node ) [static, private]

Find the number of elements in an argument.

It returns -1 if unknown.

Array<Bool> casa::TableExprConeNode::getArrayBool ( const TableExprId & id ) [virtual]

Get an array value for this node in the given row.

The appropriate functions are implemented in the derived classes and will usually invoke the get in their children and apply the operator on the resulting values.

Reimplemented from casa::TableExprNodeRep.

Array<Int64> casa::TableExprConeNode::getArrayInt ( const TableExprId & id ) [virtual]