GEOS 3.13.1
geos::geom::util::GeometryMapper Class Reference

#include <GeometryMapper.h>

Public Types

typedef std::function< std::unique_ptr< Geometry >(const Geometry &)> mapOp

Static Public Member Functions

static std::unique_ptr< Geometrymap (const Geometry &geom, mapOp op)
static std::unique_ptr< GeometryflatMap (const Geometry &geom, int emptyDim, mapOp op)

Detailed Description

Methods to map various collections of Geometrys via defined mapping functions.

Author
Martin Davis

Member Typedef Documentation

◆ mapOp

typedef std::function<std::unique_ptr<Geometry>(const Geometry&)> geos::geom::util::GeometryMapper::mapOp

An interface for geometry functions that map a geometry input to a geometry output. The output may be nullptr if there is no valid output value for the given input value.

Member Function Documentation

◆ flatMap()

std::unique_ptr< Geometry > geos::geom::util::GeometryMapper::flatMap ( const Geometry & geom,
int emptyDim,
mapOp op )
static

Maps the atomic elements of a Geometry (which may be atomic or composite) using a mapOp mapping operation into an atomic Geometry or a flat collection of the most specific type. null and empty values returned from the mapping operation are discarded.

Parameters
geomthe geometry to map
emptyDimthe dimension of empty geometry to create
opthe mapping operation
Returns
the mapped result

References flatMap().

Referenced by flatMap().

◆ map()

std::unique_ptr< Geometry > geos::geom::util::GeometryMapper::map ( const Geometry & geom,
mapOp op )
static

Maps the members of a Geometry (which may be atomic or composite) into another Geometry of most specific type. null results are skipped. In the case of hierarchical GeometryCollections, only the first level of members are mapped.

Parameters
geomthe input atomic or composite geometry
opthe mapping operation
Returns
a result collection or geometry of most specific type

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