QgsExpression::Node Class Reference

#include <qgsexpression.h>

Inheritance diagram for QgsExpression::Node:

List of all members.

Public Member Functions
virtual	~Node ()
virtual void	accept (Visitor &v) const =0
virtual QString	dump () const =0
virtual QVariant	eval (QgsExpression *parent, QgsFeature *f)=0
virtual bool	needsGeometry () const =0
virtual NodeType	nodeType () const =0
virtual bool	prepare (QgsExpression *parent, const QgsFields &fields)=0
virtual QStringList	referencedColumns () const =0

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Detailed Description

Definition at line 326 of file qgsexpression.h.

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Constructor & Destructor Documentation

virtual QgsExpression::Node::~Node

(

)

[inline, virtual]

Definition at line 329 of file qgsexpression.h.

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Member Function Documentation

virtual void QgsExpression::Node::accept

(

Visitor &

v

)

const [pure virtual]

Implemented in QgsExpression::NodeCondition, QgsExpression::NodeColumnRef, QgsExpression::NodeLiteral, QgsExpression::NodeFunction, QgsExpression::NodeInOperator, QgsExpression::NodeBinaryOperator, and QgsExpression::NodeUnaryOperator.

Referenced by QgsExpression::acceptVisitor().

virtual QString QgsExpression::Node::dump

(

)

const [pure virtual]

Implemented in QgsExpression::NodeCondition, QgsExpression::NodeColumnRef, QgsExpression::NodeLiteral, QgsExpression::NodeFunction, QgsExpression::NodeInOperator, QgsExpression::NodeBinaryOperator, and QgsExpression::NodeUnaryOperator.

Referenced by QgsExpression::dump(), QgsExpression::NodeList::dump(), and QgsExpression::NodeCondition::dump().

virtual QVariant QgsExpression::Node::eval	(	QgsExpression *	parent,
		QgsFeature *	f
	)		[pure virtual]

Implemented in QgsExpression::NodeCondition, QgsExpression::NodeColumnRef, QgsExpression::NodeLiteral, QgsExpression::NodeFunction, QgsExpression::NodeInOperator, QgsExpression::NodeBinaryOperator, and QgsExpression::NodeUnaryOperator.

Referenced by QgsExpression::NodeInOperator::eval(), QgsExpression::NodeFunction::eval(), QgsExpression::NodeCondition::eval(), and QgsExpression::evaluate().

virtual bool QgsExpression::Node::needsGeometry

(

)

const [pure virtual]

Implemented in QgsExpression::NodeCondition, QgsExpression::NodeColumnRef, QgsExpression::NodeLiteral, QgsExpression::NodeFunction, QgsExpression::NodeInOperator, QgsExpression::NodeBinaryOperator, and QgsExpression::NodeUnaryOperator.

Referenced by QgsExpression::needsGeometry(), QgsExpression::NodeInOperator::needsGeometry(), QgsExpression::NodeFunction::needsGeometry(), and QgsExpression::NodeCondition::needsGeometry().

virtual NodeType QgsExpression::Node::nodeType

(

)

const [pure virtual]

Implemented in QgsExpression::NodeCondition, QgsExpression::NodeColumnRef, QgsExpression::NodeLiteral, QgsExpression::NodeFunction, QgsExpression::NodeInOperator, QgsExpression::NodeBinaryOperator, and QgsExpression::NodeUnaryOperator.

Referenced by QgsOgcUtils::expressionBinaryOperatorToOgcFilter(), QgsOgcUtils::expressionFunctionToOgcFilter(), QgsOgcUtils::expressionNodeToOgcFilter(), and isGeometryColumn().

virtual bool QgsExpression::Node::prepare	(	QgsExpression *	parent,
		const QgsFields &	fields
	)		[pure virtual]

Implemented in QgsExpression::NodeCondition, QgsExpression::NodeColumnRef, QgsExpression::NodeLiteral, QgsExpression::NodeFunction, QgsExpression::NodeInOperator, QgsExpression::NodeBinaryOperator, and QgsExpression::NodeUnaryOperator.

Referenced by QgsExpression::prepare(), QgsExpression::NodeInOperator::prepare(), QgsExpression::NodeFunction::prepare(), and QgsExpression::NodeCondition::prepare().

virtual QStringList QgsExpression::Node::referencedColumns

(

)

const [pure virtual]

Implemented in QgsExpression::NodeCondition, QgsExpression::NodeColumnRef, QgsExpression::NodeLiteral, QgsExpression::NodeFunction, QgsExpression::NodeInOperator, QgsExpression::NodeBinaryOperator, and QgsExpression::NodeUnaryOperator.

Referenced by QgsExpression::referencedColumns(), QgsExpression::NodeInOperator::referencedColumns(), QgsExpression::NodeFunction::referencedColumns(), and QgsExpression::NodeCondition::referencedColumns().

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

• src/core/qgsexpression.h