QgsExpression::Node Class Reference

#include <qgsexpression.h>

Inheritance diagram for QgsExpression::Node:

List of all members.

Public Member Functions
virtual	~Node ()
virtual QVariant	eval (QgsExpression *parent, QgsFeature *f)=0
virtual bool	prepare (QgsExpression *parent, const QgsFieldMap &fields)=0
virtual QString	dump () const =0
virtual void	toOgcFilter (QDomDocument &doc, QDomElement &element) const
virtual QStringList	referencedColumns () const =0
virtual bool	needsGeometry () const =0
virtual void	accept (Visitor &v)=0
Static Public Member Functions
static QgsExpression::Node *	createFromOgcFilter (QDomElement &element, QString &errorMessage)

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Detailed Description

Definition at line 219 of file qgsexpression.h.

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Constructor & Destructor Documentation

virtual QgsExpression::Node::~Node

(

)

[inline, virtual]

Definition at line 222 of file qgsexpression.h.

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Member Function Documentation

virtual void QgsExpression::Node::accept

(

Visitor &

v

)

[pure virtual]

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

Referenced by QgsExpression::acceptVisitor().

QgsExpression::Node * QgsExpression::Node::createFromOgcFilter	(	QDomElement &	element,
		QString &	errorMessage
	)		[static]

Reimplemented in QgsExpression::NodeColumnRef, QgsExpression::NodeLiteral, QgsExpression::NodeFunction, QgsExpression::NodeBinaryOperator, and QgsExpression::NodeUnaryOperator.

Definition at line 630 of file qgsexpression.cpp.

References QgsExpression::BinaryOgcOperatorText, QgsExpression::boAnd, QgsExpression::boGE, QgsExpression::boLE, and QgsExpression::UnaryOgcOperatorText.

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 bool QgsExpression::Node::prepare	(	QgsExpression *	parent,
		const QgsFieldMap &	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().

virtual void QgsExpression::Node::toOgcFilter	(	QDomDocument &	doc,
		QDomElement &	element
	)		const [inline, virtual]

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

Definition at line 233 of file qgsexpression.h.

Referenced by QgsExpression::NodeList::toOgcFilter(), QgsExpression::NodeBinaryOperator::toOgcFilter(), QgsExpression::NodeInOperator::toOgcFilter(), and QgsExpression::toOgcFilter().

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

• src/core/qgsexpression.h
• src/core/qgsexpression.cpp