GeometryExtracter.h
/**********************************************************************
*
* GEOS - Geometry Engine Open Source
* http://geos.osgeo.org
*
* Copyright (C) 2011 Sandro Santilli <strk@kbt.io>
* Copyright (C) 2001-2002 Vivid Solutions Inc.
* Copyright (C) 2006 Refractions Research Inc.
*
* This is free software; you can redistribute and/or modify it under
* the terms of the GNU Lesser General Public Licence as published
* by the Free Software Foundation.
* See the COPYING file for more information.
*
**********************************************************************
*
* Last port: geom/util/GeometryExtracter.java r320 (JTS-1.12)
*
**********************************************************************/
#pragma once
#include <geos/export.h>
#include <geos/geom/GeometryFilter.h>
#include <geos/geom/GeometryCollection.h>
#include <vector>
namespace geos {
namespace geom { // geos.geom
namespace util { // geos.geom.util
class GEOS_DLL GeometryExtracter {
public:
template <class ComponentType, class TargetContainer>
static void
extract(const Geometry& geom, TargetContainer& lst)
{
if(const ComponentType* p_c = dynamic_cast<const ComponentType*>(&geom)) {
lst.push_back(p_c);
}
else if(const GeometryCollection* p_c1 =
dynamic_cast<const GeometryCollection*>(&geom)) {
GeometryExtracter::Extracter<ComponentType, TargetContainer> extracter(lst);
p_c1->apply_ro(&extracter);
}
}
private:
template <class ComponentType, class TargetContainer>
struct Extracter: public GeometryFilter {
Extracter(TargetContainer& comps) : comps_(comps) {}
TargetContainer& comps_;
void
filter_ro(const Geometry* geom) override
{
if(const ComponentType* c = dynamic_cast<const ComponentType*>(geom)) {
comps_.push_back(c);
}
}
// Declare type as noncopyable
Extracter(const Extracter& other);
Extracter& operator=(const Extracter& rhs);
};
// Declare type as noncopyable
GeometryExtracter(const GeometryExtracter& other) = delete;
GeometryExtracter& operator=(const GeometryExtracter& rhs) = delete;
};
} // namespace geos.geom.util
} // namespace geos.geom
} // namespace geos
geos::geom::GeometryCollection
Represents a collection of heterogeneous Geometry objects.
Definition GeometryCollection.h:51
geos::geom::GeometryFilter
Geometry classes support the concept of applying a Geometry filter to the Geometry.
Definition GeometryFilter.h:45
geos::geom::Geometry
Basic implementation of Geometry, constructed and destructed by GeometryFactory.
Definition Geometry.h:196
geos::geom::util::GeometryExtracter::extract
static void extract(const Geometry &geom, TargetContainer &lst)
Definition GeometryExtracter.h:48
geos::geom::util
Provides classes that parse and modify Geometry objects.
Definition ComponentCoordinateExtracter.h:28
geos::geom
Definition Angle.h:26
geos
Basic namespace for all GEOS functionalities.
Definition geos.h:38