QgsExpression::Node Class Reference

#include <qgsexpression.h>

Inheritance diagram for QgsExpression::Node:

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

Constructor & Destructor Documentation

virtual QgsExpression::Node::~Node ( )

inlinevirtual

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.

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.

virtual QVariant QgsExpression::Node::eval ( QgsExpression *  parent, const QgsFeature *  f  )

pure virtual

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

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.

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.

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.

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.

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

• /tmp/buildd/qgis-2.6.0+wheezy1/src/core/qgsexpression.h