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

Detailed Description

Definition at line 335 of file qgsexpression.h.

Constructor & Destructor Documentation

virtual QgsExpression::Node::~Node ( )

inlinevirtual

Definition at line 338 of file qgsexpression.h.

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, const 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(), QgsSymbolLayerV2Utils::fieldOrExpressionFromExpression(), geometryFromConstExpr(), 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:

• /tmp/buildd/qgis-2.2.0+wheezy1/src/core/qgsexpression.h