osmscout::FeatureReader< F > Class Template Reference

Helper template class for easy access to flag-like Features. More...

#include <FeatureReader.h>

Public Member Functions
	FeatureReader (const TypeConfig &typeConfig)
bool	GetIndex (const FeatureValueBuffer &buffer, size_t &index) const
	Returns the index of the Feature/FeatureValue within the given FeatureValueBuffer.
bool	IsSet (const FeatureValueBuffer &buffer) const
	Returns true, if the feature is set for the given FeatureValueBuffer.

Detailed Description

template<class F>
class osmscout::FeatureReader< F >

Helper template class for easy access to flag-like Features.

Each type may have stored the feature in request at a different index. The FeatureReader caches the index for each type once in the constructor and later on allows access to the feature in O(1) - without iterating of all feature(values) of an object.

Constructor & Destructor Documentation

FeatureReader()

template<class F >

osmscout::FeatureReader< F >::FeatureReader ( const TypeConfig &  typeConfig )

explicit

References osmscout::TypeConfig::GetFeature(), osmscout::TypeConfig::GetTypeCount(), and osmscout::TypeConfig::GetTypes().

Member Function Documentation

GetIndex()

template<class F >

bool osmscout::FeatureReader< F >::GetIndex	(	const FeatureValueBuffer &	buffer,
		size_t &	index
	)		const

Returns the index of the Feature/FeatureValue within the given FeatureValueBuffer.

Parameters

buffer	The FeatureValueBuffer instance
index	The index

Returns

true, if there is a valid index 8because the type has such feature), else false

References osmscout::FeatureValueBuffer::GetType().

IsSet()

template<class F >

bool osmscout::FeatureReader< F >::IsSet

(

const FeatureValueBuffer &

buffer

)

const

Returns true, if the feature is set for the given FeatureValueBuffer.

Parameters

buffer

The FeatureValueBuffer instance

Returns

true if set, else false

References osmscout::FeatureValueBuffer::GetType(), and osmscout::FeatureValueBuffer::HasFeature().

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

• FeatureReader.h