MySQL  8.0.28
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wkb_size_visitor.h
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1 #ifndef SQL_GIS_WKB_SIZE_VISITOR_H_INCLUDED
2 #define SQL_GIS_WKB_SIZE_VISITOR_H_INCLUDED
3 
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25 
27 
28 #include <cstddef> // std::size_t
29 
30 namespace gis {
31 
32 /// A visitor that computes the size of a WKB representation of a geometry.
33 class Wkb_size_visitor : public Nop_visitor {
34  private:
35  /// The size of the geometry.
36  std::size_t m_size;
37 
38  public:
39  /// Construct a new WKB visitor.
41  std::size_t size() const { return m_size; }
42 
44  bool visit_enter(Geometry *g) override;
45  bool visit_enter(Linestring *ls) override;
46  bool visit_enter(Linearring *lr) override;
47  bool visit_enter(Polygon *py) override;
48  bool visit_enter(Geometrycollection *gc) override;
49 
50  using Nop_visitor::visit;
51  bool visit(Point *pt) override;
52 };
53 
54 } // namespace gis
55 
56 #endif // SQL_GIS_WKB_SIZE_VISITOR_H_INCLUDED
Abstract superclass for all geometric objects.
Definition: geometries.h:99
A collection of geometries.
Definition: geometries.h:409
A ring-shaped linestring.
Definition: geometries.h:319
A string of connected line segments.
Definition: geometries.h:255
A visitor that implements the entire interface and does nothing.
Definition: geometry_visitor.h:121
bool visit_enter(Geometry *) override
Enters a compound geometry.
Definition: geometry_visitor.h:123
bool visit(Geometry *) override
Visits a geometry.
Definition: geometry_visitor.h:158
A 2d point.
Definition: geometries.h:149
A polygon consisting of an outer ring and zero or more interior rings defining holes in the polygon.
Definition: geometries.h:348
A visitor that computes the size of a WKB representation of a geometry.
Definition: wkb_size_visitor.h:33
Wkb_size_visitor()
Construct a new WKB visitor.
Definition: wkb_size_visitor.h:40
std::size_t m_size
The size of the geometry.
Definition: wkb_size_visitor.h:36
bool visit_enter(Geometry *) override
Definition: geometry_visitor.h:123
bool visit(Geometry *) override
Definition: geometry_visitor.h:158
std::size_t size() const
Definition: wkb_size_visitor.h:41
The geometries implement a hierarchical visitor pattern.
Definition: area.cc:46