Geometry_grouper< Base_type > Class Template Reference

Retrieve from a geometry collection geometries of the same base type into a multi-xxx geometry object. More...

Inheritance diagram for Geometry_grouper< Base_type >:

Public Member Functions
	Geometry_grouper (Group_type *out)
	Geometry_grouper (Gis_geometry_collection *out, String *gcbuf)
void	on_wkb_start (Geometry::wkbByteOrder, Geometry::wkbType geotype, const void *wkb, uint32, bool) override
	Notified when scanner sees the start of a geometry WKB. More...
void	on_wkb_end (const void *wkb_end) override
	Notified when scanner sees the end of a geometry WKB. More...
Public Member Functions inherited from WKB_scanner_event_handler
virtual	~WKB_scanner_event_handler ()=default
virtual bool	continue_scan () const

Private Types
typedef Gis_wkb_vector< Base_type >	Group_type

Private Attributes
std::vector< Geometry::wkbType >	m_types
std::vector< const void * >	m_ptrs
Group_type *	m_group
Gis_geometry_collection *	m_collection
String *	m_gcbuf
Geometry::wkbType	m_target_type

Detailed Description

template<typename Base_type>
class Geometry_grouper< Base_type >

Retrieve from a geometry collection geometries of the same base type into a multi-xxx geometry object.

For example, group all points and multipoints into a single multipoint object, where the base type is point.

Template Parameters

Base_type

the base type to group.

Member Typedef Documentation

Group_type

template<typename Base_type >

typedef Gis_wkb_vector<Base_type> Geometry_grouper< Base_type >::Group_type

private

Constructor & Destructor Documentation

Geometry_grouper() [1/2]

template<typename Base_type >

Geometry_grouper< Base_type >::Geometry_grouper ( Group_type *  out )

inlineexplicit

Geometry_grouper() [2/2]

template<typename Base_type >

Geometry_grouper< Base_type >::Geometry_grouper ( Gis_geometry_collection *  out, String *  gcbuf  )

inline

Member Function Documentation

on_wkb_end()

template<typename Base_type >

void Geometry_grouper< Base_type >::on_wkb_end ( const void *  wkb )

inlineoverridevirtual

Notified when scanner sees the end of a geometry WKB.

Parameters

wkb	the position of the first byte after the WKB byte string which the scanner just scanned.

Implements WKB_scanner_event_handler.

on_wkb_start()

template<typename Base_type >

void Geometry_grouper< Base_type >::on_wkb_start ( Geometry::wkbByteOrder  bo, Geometry::wkbType  geotype, const void *  wkb, uint32  len, bool  has_hdr  )

inlineoverridevirtual

Notified when scanner sees the start of a geometry WKB.

Parameters

bo	byte order of the WKB.
geotype	geometry type of the WKB;
wkb	WKB byte string, the first byte after the WKB header if any.
len	NO. of bytes of the WKB byte string starting from wkb. There can be many geometries in the [wkb, wkb+len) buffer.
has_hdr	whether there is a WKB header right before 'wkb' in the byte string.

Implements WKB_scanner_event_handler.

Member Data Documentation

m_collection

template<typename Base_type >

Gis_geometry_collection* Geometry_grouper< Base_type >::m_collection

private

m_gcbuf

template<typename Base_type >

String* Geometry_grouper< Base_type >::m_gcbuf

private

m_group

template<typename Base_type >

Group_type* Geometry_grouper< Base_type >::m_group

private

m_ptrs

template<typename Base_type >

std::vector<const void *> Geometry_grouper< Base_type >::m_ptrs

private

m_target_type

template<typename Base_type >

Geometry::wkbType Geometry_grouper< Base_type >::m_target_type

private

m_types

template<typename Base_type >

std::vector<Geometry::wkbType> Geometry_grouper< Base_type >::m_types

private

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

• sql/item_geofunc.cc