luciad::FeatureExpressionEvaluator Class Reference

Evaluator for a Feature. More...

#include <luciad/models/features/FeatureExpressionEvaluator.h>

Public Member Functions
virtual	~FeatureExpressionEvaluator ()=default
virtual std::optional< ExpressionValue >	apply (const Feature &feature)=0
	Evaluates an expression for the given feature. More...

Static Public Member Functions
static bool	accept (const Feature &feature, const std::shared_ptr< FeatureExpressionEvaluator > &featureExpressionEvaluator)
	Convenience method to evaluate whether a feature meets a condition. More...

Detailed Description

Evaluator for a Feature.

Constructor & Destructor Documentation

~FeatureExpressionEvaluator()

virtual luciad::FeatureExpressionEvaluator::~FeatureExpressionEvaluator ( )

virtualdefault

Member Function Documentation

accept()

static bool luciad::FeatureExpressionEvaluator::accept ( const Feature &  feature, const std::shared_ptr< FeatureExpressionEvaluator > &  featureExpressionEvaluator  )

static

Convenience method to evaluate whether a feature meets a condition.

When the evaluator does not return a boolean value this method returns false.

Parameters

feature	the feature to evaluate.
featureExpressionEvaluator	the expression evaluator.

Returns

true whether the condition is met, false otherwise.

apply()

virtual std::optional< ExpressionValue > luciad::FeatureExpressionEvaluator::apply ( const Feature &  feature )

pure virtual

Evaluates an expression for the given feature.

Parameters

feature

the feature to evaluate.

Returns

the value that is the result of evaluating the expression for the given feature.